Pig farm excrement collecting and discharging device and method in the area around Poyang Lake

Abstract

The application discloses a pig farm excrement collection and discharge device and method in a Poyang Lake region, and the pig farm excrement collection and discharge device comprises a film covering collection system and a pollutant treatment efficient degradation system. The film covering collection system comprises a primary sedimentation zone, an intermediate sedimentation zone and a final sedimentation zone which are sequentially arranged. The pollutant treatment efficient degradation system adopts an S-shaped treatment mode and specifically comprises three parts, namely a first section, an intermediate section and a tail section. The pig farm excrement collection and discharge device and method provided in the application remove COD and SS by adopting an anaerobic method, and the anaerobic depth and time determine the primary removal effect. The amount of the sediment in the primary sedimentation zone is the largest, a sediment discharge outlet is arranged to timely discharge the solid sediment, and the pollutant can be degraded layer by layer, so that the traditional water quality pollutants such as C, N and P in the pig farm wastewater can be efficiently removed, and the impact of the climate temperature difference on the wastewater treatment system can be overcome.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of the breeding industry, and particularly relates to a pig farm excrement collection and discharge device and method in the Poyang Lake region. BACKGROUND

[0002] China's pig production ranks first in the world, and pork is the main consumer product of residents. Jiangxi is a large pig breeding province, and in recent years, the pig output ranks 10th in the country. With the rapid increase in pig breeding, the treatment and discharge of excrement generated by breeding have become increasingly prominent. According to the "Second National Pollution Source Census Bulletin" released on June 8, 2020, the COD, NH3-N, TN, and TP emissions of water pollutants in the livestock and poultry breeding industry accounted for 93.76%, 51.30%, 42.14%, and 56.46% of the total agricultural source emissions, respectively. Livestock and poultry breeding is still the key prevention and control object of agricultural non-point source pollution in China.

[0003] Jiangxi is a large pig breeding province, and there are more than 2,000 livestock and poultry breeding farms in 13 counties around Poyang Lake in Jiangxi Province. From the analysis of breeding density, the pig carrying capacity per mu of cultivated land and the pig output per capita in Jiangxi Province are higher than the national average, which indicates that the pig breeding output in Jiangxi Province is high, and the pressure on the environment is also increasing. Jiangxi is located in the sensitive area of the southern water network environment, and the area of the five river basins of Poyang Lake accounts for 94% of the province, and the outflow of Poyang Lake accounts for about 16.7% of the runoff of the lower reaches of the Yangtze River. The Ecological Environment Department "Notice on Strengthening the Prevention and Control of Nitrogen and Phosphorus Pollution from Fixed Sources" (H2O

[2018] No. 16) pointed out that "total phosphorus has gradually become the primary pollutant of key lakes and reservoirs and the Yangtze River economic belt surface water"; the environmental protection level of Jiangxi's pig industry is related to the "one lake of clean water" of Poyang Lake and the safety of the Yangtze River ecological protection.

[0004] Pig farm wastewater is high-concentration organic wastewater, characterized by high COD, ammonia nitrogen, TP, and solid particle content, and strong odor. If it is directly discharged into water bodies, it will cause water eutrophication, destroy the ecological balance of water bodies, and seriously affect the environment. The main methods for treating pig farm wastewater at the present stage are three types: field application, ecological treatment, and biochemical treatment.

[0005] At present, pig breeding produces fecal pollution, especially sewage, which generally adopts the resource utilization mode of combining agriculture and animal husbandry. The sewage utilization shall meet the "Farmland Irrigation Water Quality Standard" (GB 5084-2021) standard, and the COD content of dry land crops is 200 mg / L, and the SS is 100 mg / L; the COD content of paddy crops is 150 mg / L, and the SS is 80 mg / L. Due to its special geographical location, Jiangxi Province has formulated the provincial mandatory local standard "Water Pollutant Discharge Standard of Poyang Lake Ecological Economic Zone" (DB36 / 852-2015), which requires that the COD content of the core protection area of the Poyang Lake Ecological Economic Zone and the lakeside control development zone is 60 mg / L, and the SS is 50 mg / L, which is much better than the national standard limit.

[0006] Therefore, a pig farm fecal pollution collection and discharge device and method in the Poyang Lake region are designed to make the sewage indicators after fecal pollution treatment meet the requirements of the core protection area of the Poyang Lake Ecological Economic Zone and the lakeside control development zone, which has become a research topic for those skilled in the art. SUMMARY

[0007] The application provides a pig farm fecal pollution collection and discharge device and method in the Poyang Lake region, which is used to make the sewage indicators after fecal pollution treatment meet the requirements of the core protection area of the Poyang Lake Ecological Economic Zone and the lakeside control development zone.

[0008] To achieve the above application purposes, the technical solutions adopted by the application are as follows:

[0009] The application provides a pig farm fecal pollution collection and discharge device in the Poyang Lake region, which comprises a film collection system and a pollution treatment high-efficiency degradation system.

[0010] The film collection system comprises a primary sedimentation zone, an intermediate sedimentation zone and a final sedimentation zone arranged in sequence, the intermediate sedimentation zone has a height difference with the primary sedimentation zone, and the final sedimentation zone has a height difference with the intermediate sedimentation zone.

[0011] A first inlet is arranged at the upstream of the primary sedimentation zone, and a first regulating valve is arranged at the position of the first inlet; a second inlet is arranged at the primary sedimentation zone, and a second regulating valve is arranged at the position of the second inlet; a third inlet is arranged at the final sedimentation zone, and a fourth inlet is arranged at the upstream of the pollution treatment high-efficiency degradation system.

[0012] The first inlet and the second inlet are located on the same side of the whole device, and the second inlet, the third inlet and the fourth inlet are arranged in a staggered manner.

[0013] The primary sedimentation zone is provided with a W-shaped flow channel, and the whole is inclined toward the intermediate sedimentation zone, the head end of the W-shaped flow channel is communicated with the first inlet, and the tail end is communicated with the second inlet.

[0014] The bottom of the primary sedimentation zone is provided with a plurality of gratings, and the bottom of the primary sedimentation zone is further provided with a solid removal device.

[0015] The opening degrees of the first and second regulating valves are used to adjust the residence time of the fecal sludge in the primary sedimentation zone.

[0016] Optionally, a sensor is arranged in the primary sedimentation zone to detect the height of the bottom sediment; when the sensor detects that the height of the bottom sediment reaches a first threshold value, the solid removal device is triggered to start to remove the bottom sediment from one side of the device to the other side.

[0017] Optionally, a first COD and SS measuring probe is arranged in the intermediate sedimentation zone; when it is detected that the fecal sludge in the intermediate sedimentation zone reaches a first pollutant setting value, the fecal sludge enters the final sedimentation zone through the third inlet.

[0018] Optionally, a second COD and SS measuring probe is arranged in the final sedimentation zone.

[0019] When it is detected that the fecal sludge in the final sedimentation zone reaches a second pollutant setting value, the fecal sludge flows into the pollutant treatment high-efficiency degradation system through the fourth inlet.

[0020] Optionally, the pollutant treatment high-efficiency degradation system adopts an S-shaped treatment mode, which specifically includes three parts, i.e., a first section, an intermediate section and a tail section.

[0021] The first section of the S-shaped treatment mode is provided with an anaerobic biofilm reactor.

[0022] The second section adds a flocculating agent in the intermediate section of the S-shaped treatment mode.

[0023] The third section adds a strong oxidizing agent in the tail section of the S-shaped treatment mode.

[0024] Optionally, an inductive probe is arranged in the first section and the second section of the pollutant treatment high-efficiency degradation system.

[0025] Through detection by the inductive probe, if the fecal sludge reaches a third pollutant setting value after passing through the first section and the second section, the fecal sludge is directly discharged without passing through the third section; otherwise, the third section is started.

[0026] Optionally, functional bacteria are added in the intermediate sedimentation zone and the final sedimentation zone.

[0027] Optionally, the functional bacteria are EM functional bacteria, and a cake-shaped nanometer material is hung at a position 30-80 cm below the water surface, so that the nanometer material provides a good and stable growth environment for the EM functional bacteria and resists the impact of severe water conditions on the microorganisms.

[0028] Optionally, a collection pipeline is arranged to collect the gas generated in the anaerobic fermentation process of the film collection system, including methane, NH3, H2S, odor gas;

[0029] For these gases, the removal of acidic odor is achieved by alkali absorption; the removal of basic odor is achieved by dilute acid absorption, and the methane remaining after acid and alkali absorption is used for power generation by combustion.

[0030] The application further provides a pig manure collection and discharge method for a region around Poyang Lake, which is applied to the pig manure collection and discharge device for the region around Poyang Lake, and the sensor, the first COD and SS measuring probe, the second COD and SS measuring probe and the inductive probe are connected to the controller, and the controller is further connected to the first switch, the second switch, the third switch, the first regulating valve, the second regulating valve and the solid-state removal device.

[0031] The method comprises the following steps:

[0032] In S110, the height of the bottom sediment in the primary sedimentation zone is detected by the sensor, and if the height of the bottom sediment is greater than or equal to the first threshold value, the solid-state removal device is controlled to be turned on, otherwise, the solid-state removal device is controlled to be turned off.

[0033] In S130, the opening degrees of the first regulating valve and the second regulating valve are adjusted to control the residence time of the pig manure in the primary sedimentation zone to reach the first preset time length.

[0034] In S150, the parameters of the intermediate sedimentation zone are measured by the first COD and SS measuring probe, and if the pig manure reaches the first pollutant setting value, the first switch is controlled to be turned on, otherwise, the first switch is controlled to be turned off.

[0035] In S170, the parameters of the final sedimentation zone are measured by the second COD and SS measuring probe, and if the pig manure reaches the second pollutant setting value, the second switch is controlled to be turned on, otherwise, the second switch is controlled to be turned off.

[0036] In S190, the parameters of the middle section of the S-shaped section are measured by the inductive probe, and if the pig manure reaches the third pollutant setting value, the pig manure is controlled to flow out from the second outlet by controlling the third switch, otherwise, the pig manure is controlled to flow out from the third outlet by controlling the third switch.

[0037] Compared with the prior art, the application has the following beneficial effects:

[0038] The application embodiment provides a pig farm excrement collecting and discharging device and method in a Poyang Lake region, which adopts an integrated device and can efficiently treat pig farm excrement. Specifically, the anaerobic method is adopted to remove COD and SS, and the anaerobic depth and time determine the primary removal effect. The largest amount of precipitate is in the primary sedimentation zone, and the precipitate discharge outlet (i.e., the first outlet) is arranged to timely discharge the solid precipitate, thereby ensuring the effective excrement treatment capacity of the device. The pig farm excrement collecting and discharging device in the Poyang Lake region can promote the degradation of pollutants layer by layer. Due to the influence of climate and feed, especially the large difference between winter and summer in the south, the feed intake and feed formula change affect the excrement content change and the difference is large. However, the pig farm excrement collecting and discharging device provided by the application embodiment is only affected by the excrement content at the inlet, and the residence time and degradation scheme are adjusted in time according to the degradation conditions in each region, so that the pollutants are explained scientifically and efficiently, and finally the emission standard is realized. The pig farm excrement collecting and discharging device in the Poyang Lake region overcomes the impact of climate temperature difference on the wastewater treatment system on the basis of efficiently removing traditional water quality pollutants such as C, N and P in pig farm wastewater, and properly solves the problem of discharging pollutants such as NH3, H2S and odor. BRIEF DESCRIPTION OF DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the application embodiments, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0040] Figure 1 A top view schematic diagram of a pig farm excrement collecting and discharging device in a Poyang Lake region provided by the application embodiment is shown;

[0041] Figure 2 A control system diagram of a pig farm excrement collecting and discharging device in a Poyang Lake region provided by the application embodiment is shown.

[0042] DESCRIPTION OF DRAWINGS

[0043] 10, primary sedimentation zone; 11, W-shaped flow channel; 12, first inlet; 121, first regulating valve; 13, first outlet; 14, grid; 15, sensor; 16, solid-state removal device;

[0044] 20, intermediate sedimentation zone; 21, second inlet; 211, second regulating valve; 22, first COD and SS measuring probe;

[0045] 30, final sedimentation zone; 31, third inlet; 311, first switch; 32, second COD and SS measuring probe;

[0046] 40, pollutant treatment high-efficiency degradation system; 41, first section of S shape; 42, middle section of S shape; 421, inductive probe; 43, tail section of S shape; 44, fourth inlet; 441, second switch; 45, second outlet; 451, third switch; 46, third outlet;

[0047] 50, film collection system;

[0048] 60, controller. DETAILED DESCRIPTION

[0049] In order to make the technical problems to be solved by the present application, technical solutions and beneficial effects more clearly understood, the present application will be further described in detail below in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not intended to limit the present application.

[0050] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0051] In addition, the terms "first", "second" are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified.

[0052] In order to illustrate the technical solutions described in the present application, the following will be described by specific embodiments.

[0053] Referring to Figure 1 and Figure 2 As shown in the drawings, the embodiment of the present application provides a kind of ring Poyanghuai area pig farm manure collection and discharge device, including two parts, one part is film collection system 50, another part is pollutant treatment high-efficiency degradation system 40.

[0054] As an example, the capacity of film collection system 50 is designed to store more than 120d (days) of storage capacity according to the amount of manure. Film collection system 50 is divided into three areas according to height, the first area is primary sedimentation zone 10, which accounts for 50% of the entire film area; The second area is the intermediate sedimentation zone 20, which is 2m (i.e. 2m lower) higher than the primary sedimentation zone 10, which accounts for 30% of the entire film area; The third area is the final sedimentation zone 30, which is 2m (i.e. 2m lower) higher than the intermediate sedimentation zone 20, which accounts for 20% of the entire film area.

[0055] The primary precipitation zone 10, the intermediate precipitation zone 20 and the final precipitation zone 30 are sequentially arranged, and the primary precipitation zone 10 is provided with a first inlet 12 for the pig farm excrement to enter. As an example, a first regulating valve 121 can be arranged at the first inlet 12, and by adjusting the opening degree of the first regulating valve 121, the flow rate of the excrement entering the primary precipitation zone 10 can be changed, so as to indirectly control the residence time of the excrement in the primary precipitation zone 10. The intermediate precipitation zone 20 is provided with a second inlet 21 for the excrement flowing out of the primary precipitation zone 10 to enter. The final precipitation zone 30 is provided with a third inlet 31 for the excrement flowing out of the intermediate precipitation zone 20 to enter. The upstream of the pollutant treatment high-efficiency degradation system 40 is provided with a fourth inlet 44 for the excrement flowing out of the final precipitation zone 30 to enter.

[0056] It should be noted that the first inlet 12 and the second inlet 21 are located on the same side of the entire device, and the second inlet 21, the third inlet 31 and the fourth inlet 44 are staggered, so that the residence time of the excrement can be improved. For example, the primary precipitation zone 10 is provided with a bent flow channel, which is a W-shaped flow channel 11. The W-shaped flow channel 11 is connected to the first inlet 12 and the second inlet 21 at the two ends respectively. The W-shaped flow channel 11 is used to prolong the effective length of the flow channel between the first inlet 12 and the second inlet 21, so as to improve the residence time and improve the fermentation effect. For another example, since the intermediate precipitation zone 20 and the final precipitation zone 30 are not divided into zones, the second inlet 21, the third inlet 31 and the fourth inlet 44 are staggered, so that the effective length of the flow channel between the second inlet 21 and the fourth inlet 44 can be prolonged, the residence time of the excrement in the intermediate precipitation zone 20 and the final precipitation zone 30 can be improved, and the fermentation effect can be improved.

[0057] In some embodiments of the present application, the primary precipitation zone 10 is provided with a W-shaped flow channel 11, and the whole is inclined towards the intermediate precipitation zone 20. The W-shaped flow channel 11 is connected to the first inlet 12 at the leading end and connected to the second inlet 21 at the trailing end. The W-shaped flow channel 11 can prolong the residence time of the excrement in the primary precipitation zone 10. The purpose of being inclined is to make the excrement flow automatically downstream. It should be noted that in order to ensure sufficient residence time (60 days), the inclination angle is small, for example, about 5°.

[0058] In some embodiments of the present application, the bottom of the primary precipitation zone 10 is inclined and provided with a plurality of gratings 14, which can trap large particle suspensions and most of the pig manure, so as to achieve partial removal of COD, ammonia nitrogen, TP and SS. As an example, the grating 14 is generally arranged at an angle of 60° with the horizontal plane.

[0059] In some embodiments of the present application, the bottom of the primary precipitation zone 10 is also provided with a solid-state removal device 16 Figure 1In some embodiments of the present application, a sensor 15 (not shown in the figure) can be arranged in the primary sedimentation zone 10 to detect the height of the bottom sediment. When the sensor 15 detects that the bottom sediment reaches 1 m, the solid-state removal device 16 is triggered to start removing the bottom sediment from one side of the device to the other side.

[0060] As an example, the fecal sludge stays in the primary sedimentation zone 10 for about 60 days.

[0061] It should be noted that the residence time of the fecal sludge in the primary sedimentation zone 10 can be adjusted by arranging a second regulating valve 211 at the position of the second inlet 21 and adjusting the opening degree of the second regulating valve 211. In this way, the opening degrees of the first regulating valve 121 and the second regulating valve 211 can be arranged to control the inflow and outflow respectively, so as to comprehensively adjust the residence time of the fecal sludge in the primary sedimentation zone 10.

[0062] In some embodiments of the present application, a sensor 15 (not shown in the figure) can be arranged in the primary sedimentation zone 10 to detect the height of the bottom sediment. When the sensor 15 detects that the bottom sediment reaches 1 m, the solid-state removal device 16 is triggered to start removing the bottom sediment from one side of the device to the other side. Figure 1

[0063] In some embodiments of the present application, a first COD and SS measuring probe 22 is arranged in the intermediate sedimentation zone 20. When the fecal sludge entering the intermediate sedimentation zone 20 reaches a first pollutant setting value, the fecal sludge enters the final sedimentation zone 30 through the third inlet 31.

[0064] In other words, when the fecal sludge in the intermediate sedimentation zone 20 does not reach the first pollutant setting value, the fecal sludge needs to be forced to continue to ferment in the intermediate sedimentation zone 20. Therefore, as an example, a first switch 311 (for example, a switch valve) can be arranged at the third inlet 31 to control whether the fecal sludge in the intermediate sedimentation zone 20 enters the final sedimentation zone 30. The final sedimentation zone 30 is used for further anaerobic sedimentation of the fecal sludge. The final sedimentation zone 30 is provided with a second COD and SS measuring probe 32.

[0065] In some embodiments of the present application, in order to improve the efficiency of anaerobic fermentation and prevent short-circuit flow and dead water zone, functional bacteria can be added in the intermediate sedimentation zone 20 and the final sedimentation zone 30. For example, a cake-shaped nanometer material (diameter 8-12 cm, thickness 2-3 cm) is hung at a depth of 30-80 cm below the water surface, which provides a good and stable growth environment for EM functional bacteria by using the huge specific surface area of the nanometer material to resist the impact of intense water conditions on microorganisms. EM functional bacteria are a stable bacteria group including nitrifying bacteria, denitrifying bacteria, nitrosation bacteria, and ammonification bacteria.

[0066] ​In some embodiments of the present application, a second COD and SS measuring probe 32 is arranged in the ultimate sedimentation zone 30. When the fecal sewage in the ultimate sedimentation zone 30 reaches the second pollutant setting value, the fecal sewage flows into the pollutant treatment high-efficiency degradation system 40 through the fourth inlet 44.

[0067] In other words, when the fecal sewage in the ultimate sedimentation zone 30 does not reach the second pollutant setting value, the fecal sewage needs to be forced to continue to ferment in the ultimate sedimentation zone 30. Therefore, as an example, a second switch 441 (for example, a switch valve) can be arranged at the fourth inlet 44, and the second switch 441 is used to control whether the fecal sewage in the ultimate sedimentation zone 30 enters the pollutant treatment high-efficiency degradation system 40.

[0068] In some embodiments of the present application, the pollutant treatment high-efficiency degradation system 40 adopts an S-shaped treatment mode, which specifically includes three parts, namely, a first section, an intermediate section, and a tail section.

[0069] The first section, the first section 41 of the S-shaped mode, is provided with an anaerobic biofilm reactor, which realizes further efficient degradation of COD, ammonia nitrogen, TP, and SS through the metabolism and adsorption of microorganisms on the biofilm.

[0070] The second part, the intermediate section 42 of the S-shaped mode, adds a flocculating agent, which further reduces the content of small particulate matter, colloidal matter, and other suspended matter in the wastewater through flocculation and sedimentation, so as to realize the reduction of the concentrations of COD and SS. For example, the flocculating agent includes PAC, PFS, etc., and the dosing concentration needs to be determined according to the concentration ranges of COD, ammonia nitrogen, TP, SS, etc. in the wastewater.

[0071] The third part, the tail section 43 of the S-shaped mode, adds a strong oxidizing agent (H2O2, NaClO, etc.), which realizes the removal of part of the reducing substances in COD through oxidation, and also realizes the removal of N in the wastewater based on the breakpoint chlorination method, so as to further remove the fecal sewage to reach the discharge standard.

[0072] It should be noted that in the above first part and second part, an inductive probe 421 can be arranged. Through the detection of the inductive probe 421, if the fecal sewage water quality has reached the standard after passing through the first part and the second part, that is, the fecal sewage reaches the third pollutant setting value, then it is directly discharged without needing to pass through the third part. If the wastewater quality still does not reach the standard after passing through the first part and the second part for more than 20 days, that is, the fecal sewage does not reach the third pollutant setting value, then the third part is started.

[0073] In other words, a branch channel can be provided between the second and third sections, with a second outlet 45. If the sewage quality meets the standards after passing through the first and second sections, it can be discharged directly through the second outlet 45. If the sewage quality still does not meet the standards after passing through the first and second sections and remaining for more than 20 days, it can be discharged through the third outlet 46 after passing through the third section. Specifically, a third switch 451 can be provided to control whether the sewage is ultimately discharged through the second outlet 45 or the third outlet 46.

[0074] It should be understood that the final discharged sewage should meet the requirements for the Poyang Lake water body (COD≤150mg / L, SS≤50mg / L, TN≤20mg / L, NH3-N≤15mg / L, TP≤2.0mg / L). For example, the concentrations of COD, SS, TN, TH3-N, TP, etc., can be tested using a sensor probe 421.

[0075] In some embodiments of this application, gaseous pollutants such as NH3, H2S, and odor are inevitably generated during anaerobic fermentation. Therefore, by using underground wastewater treatment facilities, in addition to achieving efficient removal of conventional pollutants such as C, N, and P from wastewater, the problem of large fluctuations in "anaerobic fermentation temperature" caused by temperature differences can be further solved, thereby achieving efficient anaerobic fermentation for methane production.

[0076] As an example, a collection pipeline can be set up ( Figure 1 (Not shown in the image) This system is used to collect gases produced during anaerobic fermentation, including methane, NH3, H2S, and odorous gases. Specifically, these gases are absorbed by alkaline solutions such as NaOH to remove acidic odorous gases like CO2 and H2S, achieving a "carbon fixation" effect. Alkaline odorous gases like NH3 are absorbed by dilute acids. Most of the remaining methane (CH4) after acid and alkali absorption can be used in nearby farmers' "liquefied petroleum gas stoves" or "centralized combustion power generation." This process prevents gas escape and reduces greenhouse gas emissions.

[0077] In some other embodiments of this application, a method for collecting and discharging manure from pig farms in the Poyang Lake area is also provided, which is applied to the manure collection and discharge device for pig farms in the Poyang Lake area provided in any of the above embodiments.

[0078] Specifically, such as Figure 2 As shown, sensor 15, first COD and SS measuring probe 22, second COD and SS measuring probe 32, and sensing probe 421 are respectively connected to controller 60. Controller 60 is also connected to first switch 311, second switch 441, third switch 451, first regulating valve 121, second regulating valve 211, and solid removal device 16.

[0079] The method includes the following steps:

[0080] S110, detecting the height of the bottom sediment of the primary sedimentation zone 10 by the sensor 15, if the detected height of the bottom sediment is greater than or equal to a first threshold value (for example, 1 meter), controlling the solid-state cleaning device 16 to be turned on, otherwise, controlling the solid-state cleaning device 16 to be turned off. In this way, the solid-state sediment can be discharged in time.

[0081] S130, by adjusting the opening degree of the first adjusting valve 121 and the second adjusting valve 211, the residence time of the fecal slurry in the primary sedimentation zone 10 is controlled to reach a first preset time length (set according to needs, for example, 60 days). In this way, the primary removal effect can be ensured.

[0082] S150, by the first COD and SS measuring probe 22, the parameters of the intermediate sedimentation zone 20 are measured, if the fecal slurry reaches a first pollutant set value (set according to needs), the first switch 311 is controlled to be turned on, otherwise, the first switch 311 is controlled to be turned off.

[0083] S170, by the second COD and SS measuring probe 32, the parameters of the final sedimentation zone 30 are measured, if the fecal slurry reaches a second pollutant set value (set according to needs), the second switch 441 is controlled to be turned on, otherwise, the second switch 441 is controlled to be turned off.

[0084] S190, by the inductive probe 421, the parameters of the middle section 42 of the S-shaped section are measured, if the fecal slurry reaches a third pollutant set value (set according to needs), the fecal slurry is controlled to flow out from the second outlet 45 by controlling the third switch 451, otherwise, the fecal slurry is controlled to flow out from the third outlet 46 by controlling the third switch 451. In this way, the pollutants can be degraded layer by layer. Specifically, due to the influence of climate and feed, especially the large difference between winter and summer in the south, the feed intake and the change of feed formula affect the change of fecal slurry content and the difference is large. However, the fecal slurry collecting and discharging device for the pig farm in the Poyang Lake region provided by the embodiment of the application is only affected by the fecal slurry content at the inlet, and the residence time and degradation scheme are adjusted in time according to the degradation of each region, so that the pollutants are scientifically and efficiently degraded, and finally the discharge standard is realized.

[0085] In summary, the pig manure collecting and discharging device and method provided by the embodiments of the present application removes COD and SS by using an anaerobic method, and the anaerobic depth and time determine the primary removal effect. The amount of sediment is the largest in the primary sedimentation zone 10, and the sediment discharge port (i.e., the first outlet 13) is arranged to timely discharge the solid sediment, thereby ensuring the effective manure treatment capacity of the device. The above pig manure collecting and discharging device in the Poyang Lake region can promote the degradation of pollutants layer by layer. Due to the influence of climate and feed, especially the large difference between winter and summer in the south, the feed intake and feed formula change affect the content change of manure, and the difference is large. However, the pig manure collecting and discharging device provided by the embodiments of the present application is only affected by the content of manure at the inlet, and the residence time and degradation scheme are adjusted in time according to the degradation conditions in each region, so as to scientifically and efficiently degrade pollutants, and finally achieve the emission standard. The above pig manure collecting and discharging device in the Poyang Lake region overcomes the impact of climate temperature difference on the wastewater treatment system on the basis of efficiently removing traditional water pollutants such as C, N and P in pig farm wastewater, and properly solves the problem of external discharge of pollutants such as NH3, H2S and odor.

[0086] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for part of the technical features; and these modifications or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A device for collecting and discharging pig manure and wastewater from pig farms in the Poyang Lake area, characterized in that, include: Membrane-coated collection systems and efficient pollutant treatment and degradation systems; The membrane collection system includes a primary sedimentation zone, an intermediate sedimentation zone, and a final sedimentation zone arranged sequentially. The intermediate sedimentation zone has a height difference from the primary sedimentation zone, and the final sedimentation zone has a height difference from the intermediate sedimentation zone. The primary sedimentation zone has a first inlet upstream, with a first regulating valve installed at the first inlet position; the intermediate sedimentation zone has a second inlet, with a second regulating valve installed at the second inlet position; the final sedimentation zone has a third inlet, and the pollutant treatment and high-efficiency degradation system has a fourth inlet upstream. The first and second inlets are located on the same side of the entire device, while the second, third, and fourth inlets are staggered. The primary sedimentation zone is equipped with a W-shaped flow channel, which is inclined towards the intermediate sedimentation zone. The first end of the W-shaped flow channel is connected to the first inlet, and the last end is connected to the second inlet. The bottom of the primary sedimentation zone is inclined and equipped with several grids, and a solid removal device is also installed at the bottom of the primary sedimentation zone; The opening degree of the first and second regulating valves is used to adjust the residence time of feces and sludge in the primary sedimentation zone; The high-efficiency degradation system for pollutant treatment adopts an S-shaped treatment method, which consists of three parts: the first stage, the middle stage, and the last stage. The first part, the first section of the S-shape, is equipped with an anaerobic biofilm reactor; The second part involves adding flocculant to the middle section of the S-shape; The third part involves adding a strong oxidant to the tail section of the S-shape.

2. The pig farm manure collection and discharge device in the Poyang Lake area according to claim 1, characterized in that, Sensors are installed in the primary sedimentation zone to detect the height of the bottom sediment. When the sensor detects that the bottom sediment height has reached a first threshold, the solid removal device is triggered to start, so as to remove the bottom sediment from one side of the device to the other side.

3. The pig farm manure collection and discharge device in the Poyang Lake area according to claim 2, characterized in that, The first COD and SS measuring probe is installed in the intermediate sedimentation zone; when the fecal waste in the intermediate sedimentation zone reaches the first pollutant set value, the fecal waste enters the final sedimentation zone through the third inlet.

4. A pig farm manure collection and discharge device in the Poyang Lake area according to claim 3, characterized in that, A second COD and SS measurement probe is installed in the final sedimentation zone; When the fecal sludge in the final sedimentation zone reaches the second pollutant set value, the fecal sludge flows into the pollutant treatment and high-efficiency degradation system through the fourth inlet.

5. A pig farm manure collection and discharge device in the Poyang Lake area according to claim 4, characterized in that, Induction probes are installed in the first and second parts of the high-efficiency degradation system for pollutant treatment; If the fecal waste reaches the set value of the third pollutant after passing through the first and second parts, it will be discharged directly without passing through the third part; otherwise, the third part will be activated.

6. A pig farm manure collection and discharge device in the Poyang Lake area according to claim 1, characterized in that, Add functional bacteria to the intermediate and final sedimentation zones.

7. A pig farm manure collection and discharge device in the Poyang Lake area according to claim 6, characterized in that, The functional microbial community consists of EM functional bacteria, which are suspended in disc-shaped nanomaterials 30-80 cm below the water surface. The huge specific surface area of ​​the nanomaterials provides a good and stable growth environment for the EM functional bacteria, resisting the impact of harsh water conditions on microorganisms.

8. A pig farm manure collection and discharge device in the Poyang Lake area according to claim 1, characterized in that, A collection pipe is installed to collect the gases produced during the anaerobic fermentation process of the membrane collection system, including methane, NH3, H2S, and odorous gases. For these gases, acidic odors are removed by alkali absorption, and alkaline odors are removed by dilute acid absorption. The methane remaining after acid and alkali absorption is used for combustion power generation.

9. A method for collecting and discharging pig farm manure in the Poyang Lake area, applied to the pig farm manure collection and discharge device described in any one of claims 1 to 8, characterized in that, The sensor, the first COD and SS measuring probe, the second COD and SS measuring probe, and the sensing probe are respectively connected to the controller. The controller is also connected to the first switch, the second switch, the third switch, the first regulating valve, the second regulating valve, and the solid removal equipment. The method includes the following steps: S110. The height of the sediment at the bottom of the primary sedimentation zone is detected by a sensor. If the height of the sediment at the bottom is greater than or equal to the first threshold, the solid removal device is turned on; otherwise, the solid removal device is turned off. S130. By adjusting the opening of the first regulating valve and the second regulating valve, the retention time of fecal matter in the primary sedimentation zone is controlled to reach the first preset time. S150. Measure the parameters of the intermediate sedimentation zone using the first COD and SS measuring probe. If the detected fecal waste reaches the first pollutant set value, control the first switch to open; otherwise, control the first switch to close. S170. Measure the parameters of the final sedimentation zone using the second COD and SS measuring probe. If the detected fecal waste reaches the second pollutant set value, control the second switch to open; otherwise, control the second switch to close. S190. The parameters of the middle section of the S-type are measured by the sensor probe. If the detected fecal waste reaches the third pollutant set value, the fecal waste is controlled to flow out from the second outlet by controlling the third switch. Otherwise, the fecal waste is controlled to flow out from the third outlet by controlling the third switch.

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