Localized accounting method for ammonia emission and emission reduction of large-scale livestock and poultry farm

Abstract

The invention discloses a localized accounting method for ammonia emission and emission reduction of a large-scale livestock and poultry farm. The method comprises the following steps: dividing the large-scale livestock and poultry farm into a colony house ammonia emission node, a liquid manure treatment link ammonia emission node and a solid manure treatment link ammonia emission node according to ammonia emission nodes; determining an ammonia emission coefficient of each ammonia emission node, a nitrogen loss ratio of ammonia at each node, a localized correction coefficient of each node and an ammonia emission reduction rate of implementing an ammonia emission reduction measure, determining an ammonia emission amount of each ammonia emission node according to the parameters, adding the ammonia emission amounts of the ammonia emission nodes, and determining the ammonia emission amount of each ammonia emission node according to the added ammonia emission amount. The ammonia emission of the large-scale livestock and poultry farm is obtained; calculating the difference between the standard year ammonia emission and the target year ammonia emission of the large-scale livestock and poultry farm to obtain the emission reduction, and finally obtaining the total emission reduction of the target year ammonia of the large-scale livestock and poultry farm in the target area. The method covers the ammonia emission link of the whole chain of the farm, avoids the missing of potential emission sources, and remarkably improves the accounting precision.

Description

Technical Field

[0001] The present invention belongs to the technical field of ammonia emission detection and relates to a localized accounting method for ammonia emission and emission reduction in large-scale livestock and poultry farms. Background Art

[0002] Ammonia (NH3) is a 2.5 ) is one of the key precursors of the formation of atmospheric ammonia, which mainly comes from agricultural activities and has become a constraint on further improvement of air quality in key areas. Domestic and foreign studies have revealed the relationship between atmospheric ammonia emissions and atmospheric environmental pollution. 2.5 In the formation process, atmospheric ammonia plays an important role and plays a key role in the formation of haze. On the one hand, ammonia, as the most important alkaline gas in the atmosphere, can react with sulfur dioxide (SO2) and nitrogen oxides (NO x ) and other reactions to generate secondary inorganic particles such as ammonium sulfate and ammonium nitrate, which become PM 2.5 It is an important component of the atmosphere. On the other hand, the generation rate of secondary inorganic particulate matter is significantly accelerated with the participation of ammonia. When ammonia is sufficient, the gas phase or heterogeneous reaction of ammonia will increase the conversion rate of gaseous precursors and the generation rate of secondary inorganic salts, causing a substantial increase in components such as ammonium sulfate ((NH4)2SO4) and ammonium nitrate (NH4NO3). Anthropogenic sources are the main source of ammonia in the atmosphere. Anthropogenic sources mainly include agricultural ammonia emissions, biomass combustion emissions and other sources. Agricultural ammonia emissions are the main source of anthropogenic ammonia in the atmosphere, accounting for 90% of the total global anthropogenic emissions. Agricultural ammonia emissions mainly come from farmland fertilization and livestock and poultry breeding. Among them, farmland fertilization ammonia emissions account for about 40% of the total agricultural ammonia emissions, and livestock and poultry breeding accounts for about 50%.

[0003] Regarding ammonia emissions and reduction calculations, my country has issued the "Regulations on the Management of Pollution Prevention and Control in Livestock and Poultry Farming" and the "Pollutant Emission Standards for Livestock and Poultry Farming," which set odor emission standards. However, these standards only cover farm boundaries and lack specific ammonia emission calculation specifications specific to farm scale and key ammonia emission links. This has resulted in a lack of guidance for local governments on achieving ammonia emission reduction baselines and targets, severely hindering ammonia emission control efforts. To improve and revise these standards, it is urgent to develop a method for calculating ammonia emission reductions for large-scale livestock and poultry farms to provide a basis for accurate calculation of livestock and poultry ammonia emissions and environmental quality management in my country. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a localized accounting method for ammonia emissions and emission reductions in large-scale livestock and poultry farms in response to the above-mentioned existing deficiencies.

[0005] In order to achieve the above technical objectives, the technical solution adopted by the present invention is:

[0006] A localized accounting method for ammonia emissions and emission reductions in large-scale livestock and poultry farms.

[0007] Step 1: Classify large-scale livestock and poultry farms into ammonia emission nodes in the pen, ammonia emission nodes in the liquid manure treatment link, and ammonia emission nodes in the solid manure treatment link according to ammonia emission nodes;

[0008] Step 2: Determine the ammonia emission coefficient EF of each ammonia emission node and the nitrogen loss ratio Frac of ammonia at each node NH3 , the localized correction coefficient f of each node and the ammonia reduction rate η of the ammonia emission reduction measures implemented, and determine the ammonia emissions of each ammonia emission node based on the above parameters. The ammonia emissions of each ammonia emission node are added together to obtain the ammonia emissions of large-scale livestock and poultry farms;

[0009] Step 3: Calculate the difference between the ammonia emissions of large-scale livestock and poultry farms in the base year and the target year to obtain the emission reduction amount, then sum up the emission reduction amounts of all large-scale livestock and poultry farms in the target area, and finally obtain the overall ammonia emission reduction amount of large-scale livestock and poultry farms in the target area in the target year.

[0010] To optimize the above technical solutions, specific measures taken also include:

[0011] The calculation method for ammonia emissions from the ammonia emission node in the barn is:

[0012]

[0013] in:

[0014] E h(i) is the ammonia emission of the i-th large-scale livestock and poultry farm;

[0015] T is the livestock species, and the value range includes: pigs, dairy cows, beef cattle, laying hens or broilers;

[0016] A (T,i) is the activity data of the T-th type of livestock and poultry in the ith large-scale livestock and poultry farm. The annual output of pigs, beef cattle, and broilers is used, and the end-of-year inventory of dairy cows and laying hens is used;

[0017] PC (T) is the breeding cycle of the T-type livestock and poultry;

[0018] a is the method of manure removal in the pen, with a range of values: dry manure removal, straw bedding, raised bed culture, water flushing or water soaking;

[0019] EF h(T,a) is the ammonia emission coefficient of the pen under the a-type manure cleaning method for the T-type livestock and poultry;

[0020] ar is the ammonia emission reduction technology in the barn, and its value range includes: optimized barn manure cleaning technology, in-barn spraying technology, biological fermentation bed technology, biological fermentation bed adding solid adsorbent technology, and closed barn exhaust gas purification technology;

[0021] η h( T ,ar) It is the emission reduction rate of the Tth type of livestock and poultry using the arth type of ammonia emission reduction technology in the pen. If there is no ammonia emission reduction technology, the value is 0.

[0022] Ammonia emission coefficient EF for the Tth type of livestock and poultry under the ath type of pen manure cleaning method h(T,a) The calculation method is:

[0023] EF h(T,a) =Nex (T) ×(1-CR N(a) )×Frac NH3_h ×γ×f h

[0024] in:

[0025] Nex (T) is the unit annual average nitrogen excretion of the T-type livestock and poultry;

[0026] CR N(a) is the collection rate of nitrogen in manure into the manure treatment facility under the first type of manure cleaning method;

[0027] Frac NH3_h is the proportion of ammonia in the nitrogen loss in the barn;

[0028] γ is the nitrogen-atmospheric ammonia conversion coefficient, which is taken as 1.214;

[0029] f h is the localized correction factor for ammonia emissions from pens, dimensionless.

[0030] The calculation method for ammonia emissions at the ammonia emission node in the liquid manure treatment process is:

[0031]

[0032] in:

[0033] E l(i) is the ammonia emission from the liquid manure treatment facility of the i-th large-scale livestock and poultry farm;

[0034] b is the liquid manure treatment method, and the range of values ​​includes: solid-liquid separation, fertilizer water storage, anaerobic fermentation, aerobic treatment, liquid organic fertilizer production, oxidation pond treatment, artificial wetland or membrane treatment;

[0035] EF l(T,a,b)is the ammonia emission coefficient of the liquid manure treatment facility for the Tth type of livestock and poultry under the ath type of pen manure removal method and the bth type of liquid manure treatment method;

[0036] br is ammonia emission reduction technology for liquid manure treatment facilities, and the range of values ​​includes: liquid manure acidification storage technology, liquid manure covered storage technology, or liquid manure covered waste gas treatment technology;

[0037] η l( T ,br) It is the emission reduction rate of the Tth type of livestock and poultry using the brth type of ammonia emission reduction technology in the liquid manure treatment facility. If there is no ammonia emission reduction technology, the value is 0.

[0038] The ammonia emission coefficient EF of the liquid manure treatment facility for the Tth type of livestock and poultry under the ath type of pen manure cleaning method and the bth type of liquid manure treatment method l(T,a,b) The calculation method is:

[0039] EF l(T,a,b) =Nex (T) ×CR N(a) ×β l ×(1-R N_l(b) )×Frac NH3_l ×γ×f m

[0040] in:

[0041] β l The mass ratio of liquid manure to total manure. If the manure is not cleaned with straw bedding, the value for livestock is 50% and for poultry is 0. If the manure is cleaned with straw bedding, the value is 0.

[0042] R N_l(b) The nitrogen retention rate of liquid manure treatment facilities under type b;

[0043] Frac NH3_l is the proportion of ammonia in nitrogen losses from liquid manure treatment facilities;

[0044] f m is the localized correction factor for ammonia emissions from manure treatment facilities, dimensionless.

[0045] The calculation method for ammonia emissions at the ammonia emission node in the solid manure treatment process is:

[0046]

[0047] in:

[0048] E s(i) is the ammonia emission from the solid manure treatment facility of the i-th large-scale livestock and poultry farm;

[0049] c is the solid manure treatment method, and the range of values ​​includes: composting, organic fertilizer production, biogas production, bedding production or substrate production;

[0050] EF s(T,a,c) is the ammonia emission coefficient of the solid manure treatment facility for the Tth type of livestock and poultry under the ath type of pen manure removal method and the cth type of solid manure treatment;

[0051] cr is the ammonia emission reduction technology for solid manure treatment facilities, and the range of values ​​includes: solid manure closed composting technology, solid manure closed composting technology, compost bio-based deodorization technology, solid manure closed composting tail gas treatment technology, and compost tail gas purification or filtration collection and treatment technology;

[0052] η s( T ,cr) It is the emission reduction rate of the Tth type of livestock and poultry using the crth type of ammonia emission reduction technology in the solid manure treatment facility. If there is no ammonia emission reduction technology, the value is 0.

[0053] The ammonia emission coefficient EF of the solid manure treatment facility for the Tth type of livestock and poultry under the ath type of pen manure cleaning method and the cth type of solid manure treatment is s(T,a,c) The calculation method is:

[0054] EFs(T,a,c)=Nex (T) ×CR N(a) ×β l ×(1-R N_s(s) )×Frac NH3_s ×γ×f m

[0055] in:

[0056] R N_s(c) The nitrogen retention rate of solid manure treatment facilities in type c;

[0057] Frac NH3_s is the proportion of ammonia in nitrogen losses from solid manure treatment facilities.

[0058] The proportion of ammonia in nitrogen loss in the barn NH3_h , the proportion of ammonia in nitrogen loss in liquid manure treatment facilities NH3_l and ammonia as a proportion of nitrogen losses in solid manure treatment facilities NH3_s The nitrogen loss in the barn is mainly due to the conversion of organic nitrogen in manure into NH3, so the Frac of all livestock species is NH3_h The nitrogen losses in liquid manure treatment facilities and solid manure treatment facilities include N2, NO, and N2O gases in addition to NH3. Therefore, the Frac of pigs NH3_lis 97.3%, Frac NH3_s The Frac of dairy cows is 47.5%. NH3_l is 98.8%, Frac NH3_s The Frac of beef cattle is 49.2%. NH3_l is 98.8%, Frac NH3_s The percentage is 49.2%, and there is no Frac in laying hens and broilers. NH3_l , Frac of laying hens NH3_s The Frac of broiler chickens is 20.4%. NH3_s It is 49.0%.

[0059] Localized correction factor f for ammonia emissions from pens h and localized correction factor f for ammonia emissions from manure and sewage treatment facilities m The method of determining is: obtaining the measured EF through census h(T,a) EF l(T,a,b) and EF s(T,a,c) The data is divided into a derivation set and a validation set, and the following operations are performed on the data in the derivation set: h(T,α) EF l(T,a,b) and EF s(T,a,c) The calculation formula is used to infer the local correction coefficient f of ammonia emissions from the pens. h and localized correction factor f for ammonia emissions from manure and sewage treatment facilities m , and then f h and f m Correlate with the local temperature to obtain f h and f m The correlation coefficient with the local temperature is then verified using the validation set. h and f m The accuracy of the correlation coefficient with the local temperature finally leads to the conclusion that the f h is 1, and when the temperature of dairy cows and beef cattle is less than 10℃, f h is 0.8, 10℃~20℃, f h is 1, when >20℃, f h is 1.4, all livestock species at 10℃~20℃, f m is 1, when >20℃, f m is 1.3, for pigs and broilers at <10℃, f m is 0.7, when the temperature of dairy cows is less than 10℃, f m is 0.8, when the temperature of laying hens and beef cattle is less than 10℃, f m is 0.9.

[0060] The calculation method for the overall ammonia emission reduction of large-scale livestock and poultry farms in the target area in the target year is as follows:

[0061]

[0062] in:

[0063] ΔE is the overall ammonia emission reduction of large-scale livestock and poultry farms in the target area in the target year;

[0064] n is the total number of large-scale livestock and poultry farms in the region in the target year;

[0065] i is the i-th large-scale livestock and poultry farm in the target year;

[0066] E 基准年(i) is the ammonia emissions of the i-th large-scale livestock and poultry farm in the base year;

[0067] E 目标年(i) is the ammonia emissions of the i-th large-scale livestock and poultry farm in the target year.

[0068] Compared with the prior art, the present invention has the following beneficial effects:

[0069] 1. This invention divides ammonia emissions into three key areas: housing, liquid manure treatment, and solid manure treatment. This system covers all aspects of ammonia emissions throughout the entire farm chain, avoiding missing potential emission sources. By combining the differentiated characteristics of different livestock and poultry types (pigs, dairy cows, poultry, etc.), manure cleaning methods (dry cleaning, straw bedding, etc.), and treatment processes (composting, anaerobic fermentation, etc.), a targeted calculation formula is established, significantly improving accounting accuracy.

[0070] 2. In addition to determining the ammonia emission coefficient EF of each ammonia emission node, the present invention also determines the nitrogen loss ratio Frac of ammonia at each node. NH3 , introduce the temperature-dependent localized correction factor (f h and f m ), and use the validation set to verify f h and f m The accuracy of the correlation coefficient with local temperature enhances the adaptability of the model to different climate zones and further improves the calculation accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0071] Figure 1 This is a diagram of ammonia emissions and reduction processes in large-scale livestock and poultry farms;

[0072] Figure 2 This is a chart showing the number of data items on ammonia emission coefficients in the pens of large-scale livestock and poultry farms in my country.

[0073] Figure 3 This is a chart showing the number of data items on ammonia emission coefficients in the manure treatment process of large-scale livestock and poultry farms in my country.

[0074] Figure 4 is the local temperature and pig housing localization correction factor (fh ) relationship diagram;

[0075] Figure 5 is the local temperature and the local correction factor of the laying hen house link (f h ) relationship diagram;

[0076] Figure 6 is the local temperature and broiler house localization correction factor (f h ) relationship diagram;

[0077] Figure 7 is the local temperature and dairy cow housing localization correction factor (f h ) relationship diagram;

[0078] Figure 8 is the local temperature and cattle housing localization correction factor (f h ) relationship diagram;

[0079] Figure 9 is the local temperature and the local correction coefficient of pig manure treatment (f m ) relationship diagram;

[0080] Figure 10 is the local temperature and the local correction coefficient for the laying hen manure treatment process (f m ) relationship diagram;

[0081] Figure 11 is the local temperature and the local correction coefficient for broiler manure treatment (f m ) relationship diagram;

[0082] Figure 12 is the local temperature and the local correction coefficient of the dairy manure treatment link (f m ) relationship diagram;

[0083] Figure 13 is the local temperature and the local correction coefficient of the beef cattle manure treatment link (f m ) relationship diagram;

[0084] Figure 14 This is the derivation and verification diagram of the localization correction coefficient of the pig housing link;

[0085] Figure 15 This is the derivation and verification diagram of the localization correction coefficient for the laying hen housing segment;

[0086] Figure 16 This is the derivation and verification diagram of the localization correction coefficient for the broiler housing segment;

[0087] Figure 17 This is the derivation and verification diagram of the localization correction coefficient of the dairy cow housing link;

[0088] Figure 18 This is the derivation and verification diagram of the localization correction coefficient for beef cattle housing;

[0089] Figure 19 This is the derivation and verification diagram of the localized correction coefficient for the pig manure treatment process;

[0090] Figure 20 This is the derivation and verification diagram of the localized correction coefficient for laying hen manure treatment;

[0091] Figure 21 This is the derivation and verification diagram of the localized correction coefficient for broiler manure treatment;

[0092] Figure 22 This is the derivation and verification diagram of the localized correction coefficient for the dairy cow manure treatment process;

[0093] Figure 23 This is the derivation and verification diagram of the localized correction coefficient for the treatment of beef cattle manure;

[0094] Figure 24 This is a diagram of the actual measurement of ammonia emissions;

[0095] Figure 25 This is a diagram showing the actual ammonia emission reduction rate. DETAILED DESCRIPTION

[0096] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the present application is described and illustrated below in conjunction with the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely used to explain this application and are not intended to limit this application. Based on the embodiments provided in this application, all other embodiments obtained by those of ordinary skill in the art without making any creative efforts are within the scope of protection of this application.

[0097] The principle of localized accounting for ammonia emissions and reductions in large-scale livestock and poultry farms of the present invention is as follows:

[0098] This accounting process adopts the emission coefficient method. According to the nitrogen substance flow process in livestock and poultry manure, the emission reduction rate of each node (sty, liquid manure treatment facility, solid manure treatment facility) is considered for the exposure nodes of the sty and manure treatment facility. The ammonia emission of each node is calculated separately, and the ammonia emission of the large-scale farm is finally obtained by adding them up (such as Figure 1 ).

[0099] Specifically, ammonia in large-scale livestock and poultry farms comes from the fermentation of nitrogen-containing substances in livestock and poultry manure, which can be represented by nitrogen excretion (Nex, kgN / head (feather) / year); in the pen link, uncollected manure will be converted into gaseous nitrogen such as ammonia through fermentation and lost. Therefore, Nex multiplied by the proportion of nitrogen loss in this link (FracNH3_h ,%), which is equal to the ammonia emission factor (EF h , kgNH3 / head (feather) / year); the collected nitrogen enters the manure treatment link, and after solid-liquid separation, part of it enters the liquid manure treatment link, and the other part enters the solid manure treatment link; in the manure treatment link, the uncollected manure also suffers gaseous nitrogen loss, of which ammonia accounts for the proportion of nitrogen loss in this link (Frac NH3 l and Frac NH3 s ) multiplied by the amount of nitrogen entering the corresponding manure treatment link, that is, the ammonia emission coefficient (EF) of this link. l and EF s ); the collected manure is eventually returned to the fields as manure. In addition, since temperature conditions are an important influencing factor of ammonia emissions and my country has a vast territory, in order to achieve the purpose of accurate accounting, it is necessary to conduct local correction of the ammonia emission coefficient of each ammonia emission node in farms located in different regions, so the local correction factor (f) is introduced. Accordingly, ammonia emission reduction in large-scale livestock and poultry farms can be specifically divided into ammonia emission reduction in pens, liquid manure treatment facilities and solid manure treatment facilities. For different ammonia emission reduction measures, there are corresponding emission reduction rates (η, %). In summary, the key to implementing accounting lies in clarifying the ammonia emission coefficient (EF) of each node, the proportion of nitrogen loss of ammonia at each node (Frac NH3 The ammonia emission reduction amount for large-scale livestock and poultry farms in the target year is calculated by taking the difference between the base year and the target year ammonia emissions of large-scale livestock and poultry farms, the localized correction factor (f) for each link in the ammonia emission coefficient, and the ammonia emission reduction rate (η) of the implemented ammonia emission reduction measures. The emission reduction amount is then summed for all large-scale livestock and poultry farms in the target area (for example, within a county), ultimately determining the overall ammonia emission reduction amount for large-scale livestock and poultry farms in the target area in the target year. Newly built large-scale livestock and poultry farms after the base year are not included in the accounting.

[0100] The calculation steps are as follows:

[0101] 1.1 Derivation process of accounting method

[0102] (1) Ammonia emission reduction in large-scale livestock and poultry farms in the target area

[0103] The ammonia emission reduction of large-scale livestock and poultry farms in the target area is the difference between the ammonia emissions in the base year and the ammonia emissions in the target year, and is calculated according to formula (1):

[0104]

[0105] in:

[0106] ΔE – the total ammonia emission reduction of large-scale livestock and poultry farms in the target area in the target year, kgNH3 / year;

[0107] n——the total number of large-scale livestock and poultry farms in the region in the target year, number;

[0108] i——the i-th large-scale livestock and poultry farm in the target year;

[0109] E 基准年(i) ——Ammonia emissions from the i-th large-scale livestock and poultry farm in the base year, kg NH3 / year;

[0110] E 目标年(i) ——Ammonia emissions from the i-th large-scale livestock and poultry farm in the target year, kg NH3 / year.

[0111] (2) Total ammonia emissions from the i-th large-scale livestock and poultry farm

[0112] In the target area, the total annual ammonia emissions of the i-th large-scale livestock and poultry farm are the sum of the ammonia emissions generated by the housing, liquid manure, and solid manure processes within the farm. This is calculated using formula (2):

[0113] E (i) =E h(i) +E l(i) +E s(i) (2)

[0114] in:

[0115] i——the i-th large-scale livestock and poultry farm in the target year;

[0116] E (i) ——Total ammonia emissions from the i-th large-scale livestock and poultry farm, kgNH3 / year;

[0117] E h(i) ——Ammonia emissions from the sties of the i-th large-scale livestock and poultry farm, kg NH3 / year;

[0118] E l(i) ——Ammonia emissions from the liquid manure treatment facilities of the i-th large-scale livestock and poultry farm, kg NH3 / year;

[0119] E s(i) ——Ammonia emissions from solid manure treatment facilities at the i-th large-scale livestock and poultry farm, kgNH3 / year.

[0120] (3) Ammonia emissions from the i-th large-scale livestock and poultry farm

[0121] In the target area, the ammonia emissions from the pens of the i-th large-scale livestock and poultry farm are calculated according to formula (3):

[0122]

[0123] in:

[0124] EF h(T,a) ——Ammonia emission coefficient of the pen under the manure cleaning method of the Tth type of livestock and poultry;

[0125] ar – Ammonia emission reduction technology in pens, with a range of values ​​including: optimized sty cleaning technology, in-pens spraying technology, bio-fermentation bed technology, bio-fermentation bed technology with solid adsorbents, and closed sty exhaust gas purification technology;

[0126] η h(T,ar) ——The emission reduction rate of the Tth type of livestock and poultry using the arth type of ammonia emission reduction technology in the pen, %. If there is no ammonia emission reduction technology, the value is 0.

[0127] (4) Ammonia emissions from the liquid manure treatment process of the i-th large-scale livestock and poultry farm

[0128] The ammonia emissions from the liquid manure treatment facilities of the i-th large-scale livestock and poultry farm are calculated according to formula (4):

[0129]

[0130] in:

[0131] EF l(T,a,b) - ammonia emission coefficient of liquid manure treatment facilities for type T livestock and poultry under type a pen manure removal method and type b liquid manure treatment method;

[0132] br——Ammonia emission reduction technology for liquid manure treatment facilities, the range of values ​​includes: Ammonia emission reduction technology for liquid manure treatment facilities, the range of values ​​includes liquid manure acidification storage technology, liquid manure covered storage technology, or liquid manure covered waste gas treatment technology;

[0133] η l( T,br)——the emission reduction rate of the brth ammonia emission reduction technology for the Tth type of livestock and poultry in the liquid manure treatment facility, %. If there is no ammonia emission reduction technology, the value is 0.

[0134] (5) Ammonia emissions from solid manure treatment at the i-th large-scale livestock and poultry farm

[0135] The ammonia emissions from the solid manure treatment facilities of the i-th large-scale livestock and poultry farm are calculated according to formula (5):

[0136]

[0137] in:

[0138] EF s(T,a,c)——Ammonia emission coefficient of solid manure treatment facilities for T-type livestock and poultry under type a of pen manure removal method and type c of solid manure treatment;

[0139] cr – ammonia emission reduction technology for solid manure treatment facilities, with the range of values ​​including: closed solid manure composting technology, closed solid manure composting technology, bio-based compost deodorization technology, closed solid manure composting tail gas treatment technology, and composting tail gas purification or filtration collection and treatment technology;

[0140] η s( T ,cr) ——The emission reduction rate of the Tth type of livestock and poultry using the crth type of ammonia emission reduction technology in solid manure treatment facilities, %. If there is no ammonia emission reduction technology, the value is 0.

[0141] (6) Ammonia emission coefficient of the pen

[0142] The ammonia emission coefficient of the pen is the average ammonia emission (kgNH3) per animal per unit time (year), and is calculated according to formula (6):

[0143] EF h(T,a) =Nex (T) ×(1-CR N(a) ×Frac NH3_h ×γ×f h (6)

[0144] in:

[0145] Nex (T) ——The average annual nitrogen excretion per head (feather) of the T-type livestock and poultry, kgN / head (feather) / year;

[0146] CR N(a) ——The collection rate of nitrogen in manure into the manure treatment facility under the first type of manure cleaning method, %;

[0147] Frac NH3_h ——the proportion of ammonia in the nitrogen loss in the barn, %;

[0148] γ——Nitrogen-atmospheric ammonia conversion coefficient, for livestock and poultry farming, take 1.214;

[0149] f h ——Localized correction factor for ammonia emissions from the barn, dimensionless.

[0150] (7) Ammonia emission coefficient of liquid manure treatment facilities

[0151] The ammonia emission coefficient of liquid manure treatment facilities is calculated according to formula (7):

[0152]

[0153] β l - The mass proportion of liquid manure to total manure, in %. If the manure is not cleaned with straw or bedding, take 50% for livestock and 0 for poultry. If the manure is cleaned with straw or bedding, take 0;

[0154] R N_l(b) ——Nitrogen retention rate after treatment in type b liquid manure treatment facilities, %;

[0155] Frac NH3_l ——% of ammonia in nitrogen losses from liquid manure treatment facilities;

[0156] f m ——Localized correction factor for ammonia emissions from manure treatment facilities, dimensionless.

[0157] (8) Ammonia emission coefficient of solid manure treatment facilities

[0158] The ammonia emission coefficient of solid manure treatment facilities is calculated according to formula (8):

[0159]

[0160] in:

[0161] R N_s(c) ——Nitrogen retention rate after treatment in type c solid manure treatment facility, %;

[0162] Frac NH3_s ——% of ammonia in nitrogen losses from solid wastewater treatment facilities;

[0163] 1.2 Derivation and verification of key parameters

[0164] Ammonia emissions reductions for livestock farms are calculated as the difference between base-year and target-year ammonia emissions. Ammonia emissions are influenced by four parameters: livestock activity data (A, head (feather), annual output or year-end inventory), the production cycle (PC, days), the ammonia emission factor (EF, kgNH3 / head (feather) / year), and the reduction rate (η) of the ammonia reduction technology. A and PC can be directly obtained from farm-reported information, while EF and η require accurate calibration. Therefore, accurately obtaining EF and scientifically assessing η are key to improving the accuracy of model calculations.

[0165] (1) Livestock breeding cycle

[0166] As shown in the following table:

[0167] Table 1. Breeding cycle of livestock species

[0168] livestock and poultry species Breeding cycle (days) pigs 152 dairy cow 365 beef cattle 660 laying hens 365 broiler chicken 48

[0169] (2) Ammonia emission coefficient

[0170] The ammonia emission factor (EF) in this standard is calculated using a nitrogen mass flow model and refers to a combination of the Tier 1 and Tier 2 methods of the IPCC Guidelines. Based on the standard nitrogen excretion of different livestock species, combined with the nitrogen loss rate under different manure cleaning modes within each exposure node and the proportion of ammonia in nitrogen loss, the ammonia release in the nitrogen excreted by each livestock species is converted to the ammonia emission factor corresponding to the livestock species. According to formulas (6) to (8), the specific key parameters are the proportion of ammonia in nitrogen loss at each link, Frac NH3 (%) and the localized correction factor f (dimensionless) of ammonia emissions at each node.

[0171] a.Frac NH3 Rate

[0172] From formulas (6) to (8), it can be seen that the calculation results of ammonia emission coefficient are affected by nitrogen excretion Nex (kg N / head (feather) / year), pen nitrogen collection rate CR N , nitrogen retention rate R under manure treatment facilities N , the mass proportion of liquid manure to total manure β l and the proportion of ammonia in nitrogen loss Frac NH3 Among them, Nex, CR N 、R N The values ​​of the three parameters are based on the "Method for Calculating the Carrying Capacity of Land with Livestock and Poultry Manure" (NY / T 3877-2021) issued by the Ministry of Agriculture and Rural Affairs; β l Refer to the Technical Guidelines for Compilation of Atmospheric Ammonia Source Emission Inventory (Trial) (Ministry of Environmental Protection Announcement No. 55 of 2014) issued by the former Ministry of Environmental Protection. NH3 Due to the lack of domestic standards or guidelines for direct reference, the value of this parameter was calibrated with reference to relevant international official guidelines.

[0173] After livestock and poultry manure is generated in the pen, the nitrogen it contains is lost in two forms: volatilization and leaching or runoff. Currently, large-scale livestock and poultry farms in my country generally use hardened flooring in their pens, and manure treatment facilities are also treated to prevent seepage. Therefore, nitrogen loss through leaching or runoff is almost nonexistent. Nitrogen loss in large-scale livestock and poultry farms is primarily through volatilization, with the main products including NH3, N2, NO, N2O, and NO2. NO2 is converted from NO and is not included in the calculation.

[0174] Since there are no clear guidelines and literature data support in China, this standard refers to the nitrogen material flow accounting method for ammonia emissions from livestock and poultry farms proposed in the 2019 Refinement to the 2006 IPCC Guidelines for National Greenhouse Gas Inventories (IPCC Guidelines) and the 2019 EMEP / EEA Air Pollutant Emission Inventory Guidebook 2019 (EEA Guidelines) of the European Environment Agency (EEA). The nitrogen loss at the pen node is mainly the conversion of organic nitrogen in manure into NH3. Therefore, the proportion of the five types of ammonia in the nitrogen loss at the pen node in this standard (Frac NH3_h ) The recommended value is 100%. In manure treatment facilities, NH3 is converted into N2, NO, N2O and other gases during the nitrification and denitrification process, so there are:

[0175] Frac NH3 =Ratio of NH3 in nitrogen loss / Sum of total nitrogen loss ratios

[0176] =EF' NH3 / (EF' NH3 +EF' N2O +EF' N2 +EF' NO )

[0177] Where: EF' is the Tier 2 emission factor, the unit is %TAN (the EF adopted in this standard is a mixed method of Tier 1 and Tier 2, so the Tier 2 emission factor uses the EF' symbol to avoid confusion).

[0178] The EEA and IPCC guidelines clearly give the specific values ​​of the above EF', as shown in Table 2.

[0179] Table 2 Frac of manure treatment process NH3 Calibration results

[0180]

[0181] Finally, the recommended values ​​for the proportion of ammonia in nitrogen loss in each link are shown in Table 3.

[0182] Table 3 Recommended values ​​of ammonia ratio in nitrogen loss

[0183]

[0184] b. Calibration of the localization correction factor (f)

[0185] Because temperature is a significant factor influencing ammonia emissions, and my country is vast, significant differences in ammonia emission coefficients were found among large-scale livestock and poultry farms in different regions during the Second Pollution Survey. Therefore, when using the standard model, significant discrepancies between the measured EF and the model-predicted EF may occur. To balance the model formula and achieve accurate calculations, ammonia emission coefficients in different regions must be locally corrected. Therefore, a local correction factor (f) is introduced, and the value of f is calibrated using the local temperature and measured EF of the farm.

[0186] The compilation team collected and compiled data records on ammonia emission coefficients of large-scale livestock and poultry farms in my country from relevant domestic and foreign publicly published literature and the Second Pollution Survey, as well as the local temperature at that time for local correction of the ammonia emission coefficient. Among them, 105 research papers were collected through Web of Science and China National Knowledge Infrastructure, 337 data records were obtained, and 1047 data records were obtained through the Second Pollution Survey, totaling 1384. 227 data of the sty link came from literature, 548 from the Second Pollution Survey, totaling 791; 653 data were randomly selected to derive the local correction coefficient f for the sty link h , the remaining 153 pieces of data are used for verification ( Figure 2 110 data items on manure and sewage treatment were obtained from literature, and 499 items were obtained from the Second Pollution Survey, totaling 609 items. 487 items were randomly selected to derive the localization correction coefficient f for manure and sewage treatment. m , the remaining 122 pieces of data are used for verification ( Figure 3 ).

[0187] According to the collected measured EF data, f is obtained by reverse deduction through formulas (6) to (8): h and f m , which is related to the local temperature as follows Figures 4 to 13 As shown. Figures 4 to 13 It can be seen that f is basically positively correlated with temperature, and f is basically close to 1 in the temperature range of 10-20℃. For the convenience of management and use, referring to the "Technical Guidelines for the Preparation of Atmospheric Ammonia Source Emission Inventory (Trial)", the annual average temperature of the region (county) where the temperature ammonia farm is located is divided into three temperature ranges: <10℃, 10-20℃ and >20℃. For different links of each livestock species, in each temperature range, 80% of the data are randomly selected as the derivation data set, and their mean is calculated as f h or f m At the same time, the remaining 20% ​​of the data is used as a validation data set, and its mean is calculated and a difference test (independent sample t test) is performed with the former to verify the derived f h and f m accuracy.

[0188] fh and f m The derivation and verification results are as follows Figures 14-23 The results of the independent sample t-test showed that there was no significant statistical difference between the constructed f and the verified f in each livestock species, stage, and temperature range grouping (P>0.05), indicating that the derived f values ​​were consistent with the actual situation.

[0189] Since the pens of large-scale pig, laying hen and broiler farms in my country have achieved constant temperature and closed breeding, EF is almost unaffected by the external environment temperature. Figures 4 to 8 and Figures 14-18 It can be seen that at the pen node, the f(f h ) is close to 1. For ease of use, the f(f h ) can be uniformly determined to be 1, while the other f values ​​are given by the mean of the corresponding estimated data. The final derived localization correction coefficients are shown in Table 4.

[0190] Table 4 Recommended values ​​of local correction coefficients for ammonia emission coefficients at various nodes in large-scale livestock and poultry farms

[0191]

[0192] In summary, the key parameter Frac NH3 The optimization of f and f, that is, the optimization of the key accounting coefficient EF is completed.

[0193] c. Other parameters

[0194] Nitrogen excretion: Nitrogen excretion of different livestock species (Nex (T) ) The recommended values ​​refer to the "Method for Calculating the Carrying Capacity of Land with Livestock and Poultry Manure" (NY / T 3877-2021), as shown in the following table:

[0195] Table 5 Recommended values ​​of nitrogen excretion for different livestock and poultry

[0196]

[0197] Nitrogen capture rate (CR) entering manure treatment facilities N(a) ): Refer to the "Calculation Method of Land Carrying Capacity of Livestock and Poultry Manure" (NY / T3877-2021), as shown in the following table:

[0198] Table 6 Recommended nitrogen collection rates for manure treatment facilities

[0199] How to clean manure in the barn Nitrogen collection rate (%) Dry manure removal 88 Straw bedding 84.5 Raised bed culture 88 Water flushing feces 87 Watery feces 89

[0200] The mass ratio of liquid manure to total manure (β l): Refer to the "Technical Guidelines for the Preparation of Atmospheric Ammonia Source Emission Inventory (Trial)" (Ministry of Environmental Protection Announcement No. 55 of 2014). If the method of manure removal in the pen is not straw bedding, the rate for livestock is 50% and for poultry is 0; if the method of manure removal in the pen is straw bedding, the rate is 0.

[0201] Nitrogen retention rate after treatment by manure treatment facilities: Refer to the "Method for Calculating the Carrying Capacity of Land for Livestock and Poultry Manure" (NY / T3877-2021), as shown in the following table:

[0202] Table 7 Recommended values ​​of nitrogen retention rate under treatment of manure and sewage treatment facilities

[0203]

[0204] 3) Ammonia emission reduction technology and recommended range of emission reduction rate

[0205] The detailed ammonia emission reduction technologies and recommended reduction rate ranges are shown in Table 8:

[0206] Table 8 Recommended ranges of ammonia emission reduction technologies and reduction rates for large-scale livestock and poultry farms

[0207]

[0208] Specific examples:

[0209] In August and September 2024, the emission reduction rate of two large-scale pig farms (Farm A and Farm B) in Taikang County, Nanyang City, Henan Province, which have implemented ammonia emission reduction measures, was monitored on site. Figure 24 ), two pens were selected for each farm to carry out ammonia emission reduction monitoring. Both farms used closed-house exhaust gas purification technology. Farm A operated with clean water (the emission reduction facilities had just been built and no chemicals were added), and Farm B operated with chemicals (sodium hypochlorite). The other environmental indicators were the same.

[0210] Each site was monitored continuously for five days, with four rounds of monitoring each day: morning (6-8 a.m.), noon (12-14 p.m.), evening (18-20 p.m.), and night (00-02 a.m.). A total of 240 measured data points were obtained, measuring ammonia concentrations before and after exhaust gas purification and calculating emission reduction rates. The accuracy of the emission reduction rates recommended in this guideline was verified by comparing the ammonia emission reduction rate range recommended by this standard with the measured ammonia emission reduction rates. The measured emission reduction rates are shown in Table 9. The final results show that the measured emission reduction rates all fell within the recommended range of this method, confirming the accuracy of the measured results.

[0211] Table 9 Actual ammonia emission reduction

[0212]

[0213] Accounting trial calculation case demonstration:

[0214] Taking Farm A, a large-scale pig farm in my country, as an example, calculate the target annual ammonia emission reduction of the farm.

[0215] 1) Information Collection

[0216] Through data collection, on-site surveys, personnel interviews, etc., basic information such as relevant activity data, breeding models and manure treatment process information of pig farm A was collected. The relevant breeding conditions in the target year and the base year are shown in Table 10.

[0217] Table 10 Pig Farm A breeding situation in target year and base year

[0218]

[0219] 2) Obtaining emission coefficient

[0220] According to the breeding conditions of Farm A in the target year and the base year, and referring to Appendix B, the calculation parameters of the ammonia emission coefficient are obtained, as shown in Table 11.

[0221] Table 11 Calculation parameters of ammonia emission coefficients for pig farm A in the target and base years

[0222]

[0223] Obtain the target year and base year ammonia emission coefficients for pig farm A:

[0224] a. Ammonia emission coefficient of the A farm shed in the base year:

[0225] EF h(T,a) =Nex (T) ×(1-CR N(a) )×Frac NH3_h ×γ×f h

[0226] =10.95×(1-88%)×100%×1.214×1

[0227] =1.60 (kg NH3 / head / year)

[0228] b. Ammonia emission coefficient of liquid manure treatment facilities at Site A in the base year:

[0229] EF l(T,a,b) =Nex (T) ×CR N(a) ×β l ×(1-R N_l(b) )×Frac NH3_l ×γ×f m

[0230] =10.95×88%×50%×(1-75%)×97.3%×1.214×1

[0231] =1.42 (kg NH3 / head / year)

[0232] c. Ammonia emission coefficient of solid manure treatment facility at site A in the base year:

[0233] EF l(T,a,b) =Nex (T) ×CR N(a) ×(1-β l )×(1-R N_s(c) )×Frac NH3_s ×γ×f m

[0234] =10.95×88%×(1-50%)×(1-68.5%)×47.5%×1.214×1

[0235] =0.88 (kg NH3 / head / year)

[0236] Similarly, the target annual ammonia emission coefficients for the barns, liquid manure treatment facilities, and solid manure treatment facilities of Farm A are 1.60 kg NH3 / head / year, 1.42 kg NH3 / head / year, and 0.88 kg NH3 / head / year, respectively.

[0237] (3) Calculation of emissions

[0238] According to the breeding conditions of Farm A in the target year and the base year, the corresponding ammonia emission reduction technology reduction rate is obtained. The relevant parameters are shown in Table 12.

[0239] Table 12 Emission reduction rates of pig farm A in the target year and base year

[0240]

[0241]

[0242] in:

[0243] η h(T,ar) ——Reduction rate of ammonia emission reduction technology of type T livestock and poultry in pens, %. If not adopted, the value is 0;

[0244] η l(T,br) ——The emission reduction rate of the brth ammonia emission reduction technology used in the liquid manure treatment facilities for the Tth type of livestock and poultry, %. If not used, the value is 0;

[0245] η s(T,br) ——Reduction rate of ammonia emission reduction technology cr in solid manure treatment facilities for type T livestock and poultry, %. If not adopted, the value is 0;

[0246] A (T,i)——Activity data of the Tth type of livestock and poultry in the ith large-scale livestock and poultry farm. The annual output of pigs, beef cattle and broiler chickens is used, and the year-end inventory of dairy cows and laying hens is used.

[0247] PC (T) ——The breeding cycle of the T type of livestock and poultry, days.

[0248] Obtain the target year and base year ammonia emission coefficients for pig farm A.

[0249] (1) Ammonia emissions from the A-pen in the base year:

[0250] E h(i) =A (T,i) ×[PC (T) / 365]×EF h(T,a) ×(1-η h(T,ar) )

[0251] =2000×(152 / 365)×1.60×67.5%

[0252] =899.51(kg NH3)

[0253] (2) Ammonia emissions from liquid manure treatment facilities at Site A in the base year:

[0254] E l(i) =A (T,i) ×[PC (T) / 365]×EF l(T,a,b) ×(1-η l(T,br) )

[0255] =2000×(152 / 365)×1.42×60%

[0256] =709.61(kg NH3)

[0257] (3) Ammonia emissions from solid wastewater treatment facilities at Site A in the base year:

[0258] E s(i) =A (T,i) ×[PC (T) / 365]×EF s(T,a,b) ×(1-η s(T,cr) )

[0259] =2000×(152 / 365)×0.88×65%

[0260] =476.41 (kg NH3)

[0261] (4) Ammonia emissions from Site A in the base year:

[0262] E (i) =E h(i) +El(i) +E s(i)

[0263] =899.51+709.61+476.41

[0264] =2085.53 (kg NH3)

[0265] Similarly, the target year ammonia emissions from site A are E 基准年(i) It is 3248.21kgNH3.

[0266] (4) Calculation of ammonia emission reduction

[0267] The final target annual ammonia emission reduction for pig farm A is:

[0268] ΔE=E 基准年(i) -E 目标年(i)

[0269] =3248.21-2085.53

[0270] =1162.68 (kg NH3)

[0271] The above embodiments are preferred implementations of the present invention, but the implementation of the present invention is not limited to the embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be considered equivalent replacement methods and are included in the scope of protection of the present invention.

Claims

1. A localized accounting method for ammonia emissions and emission reductions in large-scale livestock and poultry farms, characterized by: Step 1: Classify large-scale livestock and poultry farms into ammonia emission nodes in the pen, ammonia emission nodes in the liquid manure treatment link, and ammonia emission nodes in the solid manure treatment link according to ammonia emission nodes; Step 2: Determine the ammonia emission coefficient EF of each ammonia emission node and the nitrogen loss ratio Frac of ammonia at each node NH3 , the localized correction coefficient f of each node and the ammonia reduction rate η of the ammonia emission reduction measures implemented, and determine the ammonia emissions of each ammonia emission node based on the above parameters. The ammonia emissions of each ammonia emission node are added together to obtain the ammonia emissions of large-scale livestock and poultry farms; Step 3: Calculate the difference between the ammonia emissions of large-scale livestock and poultry farms in the base year and the target year to obtain the emission reduction amount, then sum up the emission reduction amounts of all large-scale livestock and poultry farms in the target area, and finally obtain the overall ammonia emission reduction amount of large-scale livestock and poultry farms in the target area in the target year.

2. The localized accounting method for ammonia emissions and emission reductions in large-scale livestock and poultry farms according to claim 1 is characterized by: The calculation method for the ammonia emission amount of the ammonia emission node of the housing is: in: E h(i) is the ammonia emission of the i-th large-scale livestock and poultry farm; T is the livestock species, and the value range includes: pigs, dairy cows, beef cattle, laying hens or broilers; A (T,i) is the activity data of the T-th type of livestock and poultry in the ith large-scale livestock and poultry farm. The annual output of pigs, beef cattle, and broilers is used, and the end-of-year inventory of dairy cows and laying hens is used; PC (T) is the breeding cycle of the T-type livestock and poultry; a is the method of manure removal in the pen, with a range of values: dry manure removal, straw bedding, raised bed culture, water flushing or water soaking; EF h(T,a) is the ammonia emission coefficient of the pen under the a-type manure cleaning method for the T-type livestock and poultry; ar is the ammonia emission reduction technology in the barn, and its value range includes: optimized barn manure cleaning technology, in-barn spraying technology, biological fermentation bed technology, biological fermentation bed adding solid adsorbent technology, and closed barn exhaust gas purification technology; η h(T,ar) It is the emission reduction rate of the Tth type of livestock and poultry using the arth type of ammonia emission reduction technology in the pen. If there is no ammonia emission reduction technology, the value is 0.

3. The localized accounting method for ammonia emissions and reductions in large-scale livestock and poultry farms according to claim 2 is characterized by: Ammonia emission coefficient EF of the pen under the a-type manure cleaning method for T-type livestock and poultry h(T,a) The calculation method is: EF h(T,a) =Nex (T) ×(1-CR N(a) )×Frac NH3_h ×γ×f h in: Nex (T) is the unit annual average nitrogen excretion of the T-type livestock and poultry; CR N(a) is the collection rate of nitrogen in manure into the manure treatment facility under the first type of manure cleaning method; Frac NH3_h is the proportion of ammonia in the nitrogen loss in the barn; γ is the nitrogen-atmospheric ammonia conversion coefficient, which is taken as 1.214; f h is the localized correction factor for ammonia emissions from pens, dimensionless.

4. The localized accounting method for ammonia emissions and emission reductions in large-scale livestock and poultry farms according to claim 3 is characterized by: The calculation method for ammonia emissions from the ammonia emission node in the liquid manure treatment process is as follows: in: E l(i) is the ammonia emission from the liquid manure treatment facility of the i-th large-scale livestock and poultry farm; b is the liquid manure treatment method, and the range of values ​​includes: solid-liquid separation, fertilizer water storage, anaerobic fermentation, aerobic treatment, liquid organic fertilizer production, oxidation pond treatment, artificial wetland or membrane treatment; EF l(T,a,b) is the ammonia emission coefficient of the liquid manure treatment facility for the Tth type of livestock and poultry under the ath type of pen manure removal method and the bth type of liquid manure treatment method; br is ammonia emission reduction technology for liquid manure treatment facilities, and the range of values ​​includes: liquid manure acidification storage technology, liquid manure covered storage technology, or liquid manure covered waste gas treatment technology; η l(T,br) It is the emission reduction rate of the Tth type of livestock and poultry using the brth type of ammonia emission reduction technology in the liquid manure treatment facility. If there is no ammonia emission reduction technology, the value is 0.

5. The localized accounting method for ammonia emissions and reductions in large-scale livestock and poultry farms according to claim 4 is characterized by: The ammonia emission coefficient EF of the liquid manure treatment facility for T types of livestock and poultry under the a-type pen manure cleaning method and the b-type liquid manure treatment method l(T,a,b) The calculation method is: EF l(T,a,b) =Nex (T) ×CR N(a) ×β l ×(1-R N_l(b) )×Frac NH3_l ×γ×f m in: β l The mass ratio of liquid manure to total manure. If the manure is not cleaned with straw bedding, the value for livestock is 50% and for poultry is 0. If the manure is cleaned with straw bedding, the value is 0. R N_l(b) The nitrogen retention rate of liquid manure treatment facilities under type b; Frac NH3_l is the proportion of ammonia in nitrogen losses from liquid manure treatment facilities; f m is the localized correction factor for ammonia emissions from manure treatment facilities, dimensionless.

6. The localized accounting method for ammonia emissions and reductions in large-scale livestock and poultry farms according to claim 5 is characterized by: The calculation method for ammonia emissions from the ammonia emission node in the solid manure treatment process is as follows: in: E s(i) is the ammonia emission from the solid manure treatment facility of the i-th large-scale livestock and poultry farm; c is the solid manure treatment method, and the range of values ​​includes: composting, organic fertilizer production, biogas production, bedding production or substrate production; EF s(T,a,c) is the ammonia emission coefficient of the solid manure treatment facility for the Tth type of livestock and poultry under the ath type of pen manure removal method and the cth type of solid manure treatment; cr is the ammonia emission reduction technology for solid manure treatment facilities, and the range of values ​​includes: solid manure closed composting technology, solid manure closed composting technology, compost bio-based deodorization technology, solid manure closed composting tail gas treatment technology, and compost tail gas purification or filtration collection and treatment technology; η s(T,cr) It is the emission reduction rate of the Tth type of livestock and poultry using the crth type of ammonia emission reduction technology in the solid manure treatment facility. If there is no ammonia emission reduction technology, the value is 0.

7. The localized accounting method for ammonia emissions and reductions in large-scale livestock and poultry farms according to claim 6 is characterized by: The ammonia emission coefficient EF of the solid manure treatment facility for T types of livestock and poultry under the a-type pen manure cleaning method and the c-type solid manure treatment method s(T,a,c) The calculation method is: EFs(T,a,C)=Nex (T) ×CR N(a) ×β l ×(1-R N_s(c) )×Frac NH3_s ×γ×f m in: R N_s(c) The nitrogen retention rate of solid manure treatment facilities in type c; Frac NH3_s is the proportion of ammonia in nitrogen losses from solid manure treatment facilities.

8. The localized accounting method for ammonia emissions and reductions in large-scale livestock and poultry farms according to claim 7 is characterized by: The proportion of ammonia in the nitrogen loss of the barn is Frac NH3_h , the proportion of ammonia in nitrogen loss in liquid manure treatment facilities NH3_l and ammonia as a proportion of nitrogen losses in solid manure treatment facilities NH3_s The nitrogen loss in the barn is mainly due to the conversion of organic nitrogen in manure into NH3, so the Frac of all livestock species is NH3_h The nitrogen losses in liquid manure treatment facilities and solid manure treatment facilities include N2, NO, and N2O gases in addition to NH3. Therefore, the Frac of pigs NH3_l is 97.3%, Frac NH3_s The Frac of dairy cows is 47.5%. NH3_l is 98.8%, Frac NH3_s The Frac of beef cattle is 49.2%. NH3_l is 98.8%, Frac NH3_s The percentage is 49.2%, and there is no Frac in laying hens and broilers. NH3_l , Frac of laying hens NH3_s The Frac of broiler chickens is 20.4%. NH3_s It is 49.0%.

9. The localized accounting method for ammonia emissions and reductions in large-scale livestock and poultry farms according to claim 7 is characterized by: Localized correction factor f for ammonia emissions from pens h and localized correction factor f for ammonia emissions from manure and sewage treatment facilities m The method of determining is: obtaining the measured EF through census h(T,a) EF l(T,a,b) and EF s(T,a,c) The data is divided into a derivation set and a validation set, and the following operations are performed on the data in the derivation set: h(T,a) EF l(T,a,b) and EF s(T,a,c) The calculation formula is used to infer the local correction coefficient f of ammonia emissions from the pens. h and localized correction factor f for ammonia emissions from manure and sewage treatment facilities m , and then f h and f m Correlate with the local temperature to obtain f h and f m The correlation coefficient with the local temperature is then verified using the validation set. h and f m The accuracy of the correlation coefficient with the local temperature finally leads to the conclusion that the f h is 1, and when the temperature of dairy cows and beef cattle is less than 10℃, f h is 0.8, 10℃~20℃, f h is 1, when >20℃, f h is 1.4, all livestock species at 10℃~20℃, f m is 1, when >20℃, f m is 1.3, for pigs and broilers at <10℃, f m is 0.7, when the temperature of dairy cows is less than 10℃, f m is 0.8, when the temperature of laying hens and beef cattle is less than 10℃, f m is 0.

9.

10. The localized accounting method for ammonia emissions and reductions in large-scale livestock and poultry farms according to claim 7 is characterized by: The calculation method for the overall ammonia emission reduction of large-scale livestock and poultry farms in the target area in the target year is as follows: in: ΔE is the overall ammonia emission reduction of large-scale livestock and poultry farms in the target area in the target year; n is the total number of large-scale livestock and poultry farms in the region in the target year; i is the i-th large-scale livestock and poultry farm in the target year; E 基准年(i) is the ammonia emissions of the i-th large-scale livestock and poultry farm in the base year; E 目标年(i) is the ammonia emissions of the i-th large-scale livestock and poultry farm in the target year.

Images