Organic waste aerobic composting method

Abstract

The invention relates to the technical field of composting methods, in particular to an organic waste aerobic composting method which comprises a duration defining unit, a turning confirmation unit and an interval adjusting unit. The duration delimiting unit is used for evaluating and predicting the duration required by composting according to the content ratio of various substance components in a raw material sample, the volume of the raw material, the density of the raw material and the particle size distribution of the raw material before the composting is started, and then three temperature change intervals in the aerobic composting process are further divided, so that the composting time is determined. The turning confirmation unit can further determine and adjust the moment node of the temperature change interval, and the nodes between the intervals are corrected according to the internal temperature of the pile body after turning and the change of the substance content ratio at different stages, so that the turning operation is carried out at different stages; therefore, the starting time and the adjusting time of the pile turning strategy can be better determined.

Description

Technical Field

[0001] The invention relates to the technical field of composting methods, and in particular to an aerobic composting method for organic waste. Background Art

[0002] Aerobic composting of organic waste is an efficient technology for the treatment and utilization of organic waste. It mainly utilizes the biochemical action of microorganisms to decompose, mature and convert the organic matter in organic waste into a stable humus-like soil under artificial control conditions. Through scientific operation and management of pre-treatment, main fermentation, post-fermentation and post-treatment, organic waste can be converted into stable humus soil material, thus realizing the recycling of resources and sustainable development of the environment.

[0003] The composting cycle of organic waste treatment is affected by many factors of the composting raw materials. In the prior art, a fixed composting cycle is generally used as a prediction of the time required for composting to be completed. This results in the actual completion time of the composting being affected by the composting raw materials, which may be earlier or later than the expected completion time, affecting the work arrangements after the composting is completed. In addition, the microbial decomposition stage in the composting process is difficult to predict, making it difficult to adjust the timely turning of the compost or the turning strategy, which affects the fertilizer production efficiency of the compost and has certain defects. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, the present invention provides an aerobic composting method for organic waste, which can effectively solve the problems in the prior art of the expected completion time of composting and the unpredictable microbial decomposition stage during the composting process.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] The present invention provides an organic waste aerobic composting method, which at least comprises: a time length demarcation unit for predicting the period required for the completion of composting;

[0007] Obtain the content composition of various substances in the raw material sample, and analyze and derive the content influence value from it. Obtain the proportion of different particle size ranges of the raw material sample, and analyze and derive the particle influence value from it. Combined with the total mass and density of the raw material, analyze and calculate the cycle prediction value.

[0008] The first stage distinction value is obtained based on the total mass analysis, and the second stage distinction value is obtained by combining the first stage distinction value with the content influence value analysis. The predicted composting cycle is divided into a warming interval, a high temperature interval, and a low temperature interval using the first stage distinction value and the second stage distinction value as interval nodes;

[0009] Also includes:

[0010] The compost turning confirmation unit uses the high temperature interval and the low temperature interval as the fast compost turning cycle and the slow compost turning cycle and makes adaptive adjustments, wherein:

[0011] Obtain a line graph of the temperature change inside the pile, and correct the initial moments of the two pile turning cycles based on the difference in the content of different substances in the pile samples.

[0012] Furthermore, the duration delimiting unit predicts the cycle process required for the composting to be completed as follows:

[0013] Obtain the carbohydrate proportion P1, protein proportion P2, fat proportion P3, lignin proportion P4 and cellulose proportion P5 in the raw material sample and substitute them into the formula Calculate the content influence value P HD , where k1 and k2 are preset weight coefficients;

[0014] Take the density value ρ of the raw material sample TD , obtain the total mass m1 of the compost raw materials;

[0015] The raw material sample particles are screened through sieves with different apertures to obtain multiple raw material monomers, which are recorded as X in order of particle size. i , i∈(1,2,…,j), i is the serial number of the raw material monomer, j is the total number of raw material monomers, and the mass of each raw material monomer is calculated as the proportion Z in the raw material sample i , substitute into the formula P KD =∑(f(X i )*Z i ) to obtain the particle impact value P of the raw material sample KD ,in w is a preset constant value;

[0016] Get the content impact value P HD , density value ρ TD , total mass m1 and particle impact value P KD , substitute into the formula Calculate and get the period prediction value T all , where λ1 is the preset proportional coefficient, T0 is the preset fixed period value, N1 is the limit constant, Indicates that the value is not greater than The maximum integer of the period prediction value T all Completes required cycle as compost.

[0017] Furthermore, the period prediction value T all Divided into three temperature change intervals, the division process is:

[0018] Get the total mass m1 and content influence value P HD And the period prediction value Tall , substitute the total mass m1 into the formula Calculation is performed in , T1′ is the preset heating stage cycle value, m0 is the preset basic weight value, and the first stage distinction value T1 is obtained;

[0019] The content affects the value P HD and the periodic forecast value T all Substitute into the formula Calculation is performed to obtain the second stage distinction value T2, where λ2 is a preset proportionality coefficient;

[0020] The period prediction value T all It is divided into the temperature rise interval [0, T1], the high temperature interval [T1, T2] and the low temperature interval [T2, T all ], turn the pile within the time range of high temperature range and low temperature range.

[0021] Furthermore, the compost turning confirmation unit is used to adjust and correct the compost turning cycle, and the specific process is as follows:

[0022] In the high temperature range [T1, T2] and the low temperature range [T2, T all ] range, and record them as fast turning cycle and slow turning cycle respectively, obtain the internal temperature of the pile and draw a line graph of the internal temperature change over time, at the initial moment of the fast turning cycle and the slow turning cycle, obtain the content proportion of fat, protein, carbohydrate, lignin and cellulose in the pile sample, and correct the turning cycle accordingly;

[0023] When the compost is turned, T all If the pile is not fully decomposed after a certain period of time, continue turning the pile.

[0024] Furthermore, the process of correcting the initial time of the rapid compost turning cycle is:

[0025] At time T1 after the start of composting, a line graph of the internal temperature change over time on the previous day is obtained, each point in the line graph is analyzed, the slope between two adjacent points is calculated, multiple slope values ​​are obtained, and the average value is calculated to obtain a first slope analysis value;

[0026] When the current internal temperature of the pile is greater than the temperature threshold, the rapid pile turning cycle [T1, T2] is taken as the actual rapid cycle;

[0027] When the first slope analysis value is greater than or equal to the preset slope threshold, and the current internal temperature of the pile is less than the temperature threshold, the proportions of carbohydrates, proteins, and fats in the current pile sample are recorded as P1′, P2′, and P3′, respectively, and substituted into the formula Calculate the first cycle correction value T1′, where k′ is the preset proportional coefficient. The actual rapid cycle after correction is [T1′, T2]. In the actual rapid cycle, the turning time interval is set to T a , T a is the default value.

[0028] Furthermore, the process of correcting the initial time of the slow compost turning cycle is:

[0029] At time T2 after the start of composting, a line graph of the internal temperature change over time in the past day is obtained and each point in the line graph is analyzed, the slope between two adjacent points is calculated, multiple slope values ​​are obtained, and the average value is calculated to obtain a second slope analysis value;

[0030] When the current internal temperature of the pile is lower than the temperature threshold, the slow turning cycle [T2, T all ] as the actual slow cycle;

[0031] When the first slope analysis value is less than or equal to the preset slope threshold, and the current internal temperature of the pile is greater than the temperature threshold, the proportion of lignin and cellulose in the current pile sample is recorded as P4' and P5' respectively, and substituted into the formula The second cycle correction value T2′ is calculated and the actual slow cycle after correction is [T2′, T all ], set the turning time interval to T in the actual slow cycle b , T b is the preset value, T b Greater than T a .

[0032] Furthermore, it also includes an interval adjustment unit;

[0033] The interval adjustment unit adjusts the time interval of the compost turning within the corrected rapid compost turning cycle, performs the first compost turning at the initial moment and records the compost turning as the compost turning sequence Fd0, and records each subsequent compost turning as Fd n , n∈(1,2,…,m), n is the sequence number of the pile turning, and m+1 is the total number of pile turnings in the actual fast cycle;

[0034] Suppose the adjusted two consecutive compost turnings Fd n-1 and Fd n The time interval is Determine the time interval based on the various gas components in the pile

[0035] Furthermore, the time interval The determination process is as follows:

[0036] During the interval between two consecutive compost turnings, the concentrations of oxygen, dimethyl sulfide, ammonia and nitrous oxide in the compost were regularly obtained and recorded as β0, β S , Substitute into the formula Calculate in and get the anaerobic concentration value α;

[0037] A line graph of the anaerobic concentration α changing with time is drawn, and the fitted straight line α = a*t+b is obtained by linear fitting, where t represents the time of recording and the time of turning the compost Fd n-1 The interval between moments, a and b are both constant values;

[0038] Substitute the preset anaerobic concentration threshold α′ into the formula to calculate t′, and take the largest integer not greater than t′ as

[0039] Compared with the known prior art, the technical solution provided by the present invention has the following beneficial effects:

[0040] 1. The present invention predicts the time required for composting completion by comprehensively considering the material composition of the composting raw materials, the density and quality of the composting raw materials, and the particle size of the composting raw materials, which is helpful for performing composting auxiliary work according to the predicted period at the beginning of composting, and arranging work scheduling according to the predicted completion period. Furthermore, the temperature change stage during the composting process can be predicted according to the proportion of materials with different levels of difficulty in microbial decomposition in the composting raw materials, thereby facilitating adjustment of the compost turning strategy according to the characteristics of different active stages of microorganisms.

[0041] 2. The present invention further analyzes the temperature of the pile, the temperature change trend and the proportion of material composition in the sample at the predicted start time of the cycle, so as to determine the activity of microorganisms in the pile and whether the raw materials of the pile have been decomposed to the corresponding turning stage, and then decide whether the pile is needed and determine the corresponding turning frequency. According to the actual decomposition of the pile, it is decided whether the initial moment of the turning cycle needs to be postponed, thereby reducing the impact of adjusting the turning strategy in advance on the decomposition efficiency when the temperature is not fully raised and the decomposition is not sufficient.

[0042] 3. The present invention analyzes the formation of anaerobic conditions in the pile by calculating the production content of these gases, so as to timely turn the pile before the anaerobic conditions are fully formed to reduce the negative impact caused by the anaerobic conditions. Compared with the fixed-cycle compost turning strategy, it can effectively reduce the formation of odorous substances, reduce the loss of nitrogen elements, and further improve the fertility of humus after decomposition is completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0044] Figure 1 It is the overall module block diagram of the present invention. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] The present invention will be further described below in conjunction with the embodiments.

[0047] Embodiment 1:

[0048] See also Figure 1 , an aerobic composting method for organic waste, at least comprising: a time determination unit and a compost turning confirmation unit.

[0049] A complete aerobic composting process can usually be divided into four stages: heating stage, high temperature stage, cooling stage and decomposition (solidification) stage.

[0050] The duration determination unit evaluates and predicts the duration required for composting before composting begins, thereby preliminarily dividing the aerobic composting process into three intervals to facilitate compost turning operations at different stages. The evaluation and prediction process is as follows:

[0051] Extract raw material samples from compost raw materials, obtain the content ratios of fat, protein, carbohydrate, lignin and cellulose in the raw material samples (in percentage system), record them as carbohydrate ratio P1, protein ratio P2, fat ratio P3, lignin ratio P4 and cellulose ratio P5 respectively, and substitute them into the formula Calculate the content influence value P HD , where k1 and k2 are preset weight coefficients. The content impact value can reflect the material composition of the compost raw materials, and is inversely proportional to the content of lignin and cellulose, and directly proportional to the content of fat, protein, and carbohydrates. The increase in the content of lignin and cellulose will significantly affect the decomposition efficiency of microorganisms, resulting in an increase in the total time required for complete decomposition;

[0052] It should be noted that compost raw materials refer to raw materials obtained by crushing and mixing a variety of organic wastes. Compost raw materials are generally not limited to organic wastes from a certain source. They are usually composed of one or more organic wastes such as kitchen waste, garden waste, animal manure, agricultural waste, etc., and are formed into compost raw materials after being fully crushed, stirred and mixed to ensure the efficiency of microbial decomposition during the composting process and improve the fertility of humus after decomposition is completed.

[0053] Obtain the total mass and volume of the raw material sample, and calculate the density value ρ of the raw material sample TD , obtain the total mass m1 of the compost raw materials;

[0054] The raw material sample particles are screened from small to large through a plurality of sieves with different aperture specifications (in a specific embodiment, sieves with 5 mm, 10 mm, 20 mm, and 30 mm apertures are selected) to obtain a plurality of raw material monomers with different particle sizes, which are recorded as X in order of particle size. i , i∈(1,2,…,j), i is the serial number of the raw material monomer, j is the total number of raw material monomers, and the mass of each raw material monomer is calculated as the proportion Z in the raw material sample i , substitute into the formula P KD =Σ(f(X i )*Z i ) to obtain the particle impact value P of the raw material sample KD , where f(i) = w - (ij / 2) 2 , w is a preset constant value, which is set by the staff during the specific implementation;

[0055] It should be noted that the size of the raw material particles is related to the size of the raw material surface area. Generally speaking, the larger the particles, the larger the surface area. Within a certain range, the increase in surface area will accelerate the rate at which the raw material particles are decomposed by microorganisms. However, when the particle size exceeds a certain range, its unit surface area (surface area divided by volume) decreases, and the microbial decomposition rate will be greatly reduced.

[0056] Get the content impact value P HD , density value ρ TD , total mass m1 and particle impact value P KD , substitute into the formula Calculate and get the period prediction value T all , where λ1 is the preset proportional coefficient, T0 is the preset fixed period value, N1 is the limit constant, Indicates that the value is not greater than The maximum integer of (the same below), the period prediction value T all The estimated total number of cycles required for complete decomposition of compostable materials.

[0057] It should be noted that predicting the time required for complete decomposition of raw materials by comprehensively considering the raw material composition, quality, density and particle conditions can help staff reasonably adjust work arrangements during and after composting according to the characteristics and composition of the raw materials, compared to direct planning in the prior art.

[0058] For the period prediction value T all Further segmentation is carried out to divide it into three temperature change intervals. The division process is as follows:

[0059] Get the total mass m1 and content influence value P HD And the period prediction value T all , substitute the total mass m1 into the formula Calculate in, T1′ is the preset temperature rise period value, m0 is the preset basic weight value, get the first stage distinction value T1, and the content influence value P HD and the periodic forecast value T all Substitute into the formula Calculate the second stage distinction value T2, where λ2 is the preset proportional coefficient, and convert the period prediction value T all It is divided into the temperature rise interval [0, T1], the high temperature interval [T1, T2] and the low temperature interval [T2, T all ], turn the pile within the high temperature interval time range and the low temperature interval time range, and the frequency of turning the pile is adjusted according to the different intervals.

[0060] It should be noted that turning the compost (also called turning or stirring) during the composting process is to ensure the uniform decomposition of the composting materials and improve the efficiency and quality of the composting. Turning the compost is generally not performed during the temperature rise stage of the composting process to avoid heat loss and ensure a steady temperature rise. When the compost enters the high temperature stage, the microorganisms also enter an active stage (dissipating heat, generating water, and consuming oxygen). More frequent turning of the compost is required to ensure the oxygen supply, uniform water content, uniform temperature, and uniform materials in the compost body to improve the decomposition efficiency. Finally, in the low temperature stage of the composting (cooling stage and maturity stage), the decomposition of organic matter slows down, and the number of turning the compost should be reduced to help maintain heat while redistributing water and promote uniform maturity of the composting materials.

[0061] The compost turning confirmation unit is used to adjust and correct the compost turning cycle. The specific process is as follows:

[0062] In the high temperature range [T1, T2] and the low temperature range [T2, T all] range, and record them as fast turning cycle and slow turning cycle respectively, obtain the internal temperature of the pile (the temperature at a depth of 20 cm from the surface of the pile) and draw a line graph of the internal temperature change over time, at the initial moment of the fast turning cycle and the slow turning cycle, obtain the content proportion of fat, protein, carbohydrate, lignin and cellulose in the pile sample, and correct the turning cycle accordingly;

[0063] It should be noted that although the time demarcation unit gives the predicted high temperature interval time range and low temperature interval time range to facilitate the staff to determine the time and frequency of turning the compost, the phased progress of composting in the actual process needs to be further distinguished in combination with the actual decomposition of various material components in the compost.

[0064] At time T1 after the start of composting, obtain a line graph of the internal temperature change over time in the past day and analyze each point in the line graph, calculate the slope between two adjacent points, obtain multiple slope values ​​and calculate the average value to obtain the first slope analysis value. When the current internal temperature of the pile is greater than the temperature threshold, the rapid turning cycle [T1, T2] is taken as the actual rapid cycle; when the first slope analysis value is greater than or equal to the preset slope threshold, and the current internal temperature of the pile is less than the temperature threshold, the proportion of carbohydrates, proteins, and fats in the current pile sample is recorded as P1′, P2′, and P3′, respectively, and substituted into the formula Calculate the first cycle correction value T1′, where k′ is the preset proportional coefficient. The actual rapid cycle after correction is [T1′, T2]. In the actual rapid cycle, the turning time interval is set to T a , T a is the default value;

[0065] At time T2 after the start of composting, obtain a line graph of the internal temperature change over time in the past day and analyze each point in the line graph, calculate the slope between two adjacent points, obtain multiple slope values ​​and calculate the average value to obtain the second slope analysis value. When the current internal temperature of the pile is lower than the temperature threshold, the slow turning cycle [T2, T all ] as the actual slow cycle; when the first slope analysis value is less than or equal to the preset slope threshold, and the current internal temperature of the pile is greater than the temperature threshold, the proportion of lignin and cellulose in the current pile sample is recorded as P4′ and P5′ respectively, and substituted into the formula The second cycle correction value T2′ is calculated and the actual slow cycle after correction is [T2′, T all ], set the turning time interval to T in the actual slow cycle b , T b is the preset value, T b Greater than T a (T a, T b The preset compost turning cycle is specifically set by the staff. In a specific embodiment, T a 5 days, T b 15 days);

[0066] When the compost is turned, T all If the compost is not fully mature (i.e. the proportion of fat, protein, carbohydrate, lignin and cellulose in the sample has not dropped below the set threshold), the compost will continue to be turned at the time interval T. b Turn the pile.

[0067] By further analyzing the temperature of the pile, the temperature change trend and the proportion of material composition in the sample at the predicted start time of the cycle, the activity of microorganisms in the pile and whether the raw materials of the pile have been decomposed to the corresponding turning stage can be determined, and then it can be decided whether the pile is needed and the corresponding turning frequency can be determined. According to the actual decomposition of the pile, it can be decided whether the initial moment of the turning cycle needs to be postponed, thereby reducing the impact of adjusting the turning strategy in advance on the decomposition efficiency when the temperature is not fully raised and the decomposition is not sufficient.

[0068] Embodiment 2:

[0069] Based on an aerobic composting method for organic waste in Example 1, a specific compost turning frequency is used to turn the pile in the high-temperature stage during the composting process. However, although regular compost turning can ensure the continuous turning of the pile, it is difficult to ensure that the temperature of the pile will not be too high. Especially when the room temperature is high and the humidity is high, the regular compost turning strategy may lead to untimely compost turning, resulting in excessively high pile temperature and anaerobic conditions, which affect the decomposition efficiency of aerobic microorganisms. Therefore, it is necessary to adjust the compost turning interval.

[0070] Compared with the first embodiment, the present embodiment is different in that it further includes an interval adjustment unit;

[0071] The interval adjustment unit adjusts the time interval of the compost turning within the actual rapid cycle, performs the first compost turning at the beginning of the actual rapid cycle and records the compost turning as the compost turning sequence Fd0, and records each subsequent compost turning as Fd n , n∈(1,2,…,m), n is the sequence number of the pile turning, m+1 is the total number of pile turnings in the actual fast cycle, and the adjusted adjacent two pile turnings Fd n-1 and Fd n The time interval is (i.e. turning the compost Fd n-1 After completion Time for turning the pile Fd n ), The adjustment process is as follows:

[0072] During the interval between two consecutive compost turnings, the concentrations of oxygen, dimethyl sulfide, ammonia and nitrous oxide in the compost were regularly obtained and recorded as β0, β S , Substitute into the formula Calculate the anaerobic concentration value α, draw a line graph of the anaerobic concentration value α changing with time, and perform linear fitting to obtain the fitting straight line α=a*t+b, where t represents the recording time and the compost turning Fd n-1 The interval between the time points, a and b are both constant values. Substitute the preset anaerobic concentration threshold α′ into the formula for calculation to obtain t′. The largest integer not greater than t′ (the unit is days. When t′ is other time units, it is converted into days and then rounded) is taken as

[0073] It should be noted that when the compost is not turned in time, anaerobic conditions will be formed. Under anaerobic conditions, the decomposition of sulfur-containing organic matter will form hydrogen sulfide, and at the same time will cause the loss of nitrogen in the compost. The loss of nitrogen will be accompanied by an increase in the content of ammonia and nitrous oxide. Therefore, the formation of anaerobic conditions in the compost is analyzed by calculating the production content of these gases, so that the compost can be turned in time before the anaerobic conditions are fully formed to reduce the negative impact caused by anaerobic conditions. Compared with the fixed-cycle compost turning strategy, it can effectively reduce the formation of odorous substances, reduce the loss of nitrogen, and further improve the fertility of humus after decomposition is completed.

[0074] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. An aerobic composting method for organic waste, comprising a time-determining unit for predicting the period required for the composting to be completed, characterized in that: include: Obtain the content ratio of various substances in the raw material sample and calculate the content impact value, obtain the content ratio of different particle size ranges of the raw material sample and obtain the particle impact value, and calculate the cycle prediction value based on the total mass and density of the raw material; Determine the first-stage distinguishing value, combine the first-stage distinguishing value with the content influence value and the cycle prediction value to calculate the second-stage distinguishing value, and divide the predicted composting cycle into a high-temperature interval and a low-temperature interval based on the first-stage distinguishing value and the second-stage distinguishing value; Also includes: The compost turning confirmation unit uses the high temperature interval and the low temperature interval as the fast compost turning cycle and the slow compost turning cycle, wherein: Construct a line graph of the temperature change inside the pile, clarify the slope between two adjacent points to calculate the first slope analysis value and the second slope analysis value, combine the first slope analysis value and the second slope analysis value with the current internal temperature of the pile for analysis, and determine whether to correct the initial time of the fast pile turning cycle or the slow pile turning cycle based on the difference in the change of the material content in the pile samples.

2. The method for aerobic composting of organic waste according to claim 1, characterized in that: The duration determination unit predicts the cycle required for composting to complete as follows: Obtain the carbohydrate proportion P1, protein proportion P2, fat proportion P3, lignin proportion P4 and cellulose proportion P5 in the raw material sample and substitute them into the formula Calculate the content influence value P HD , where k1 and k2 are preset weight coefficients; Take the density value ρ of the raw material sample TD , obtain the total mass m1 of the compost raw materials; The raw material sample particles are screened to obtain raw material monomers of different sizes, which are marked as X in order of particle size. i , i∈(1,2,…,j), i is the serial number of the raw material monomer, j is the total number of raw material monomers, and the mass of each raw material monomer is calculated as the proportion Z in the raw material sample i , substitute into the formula P KD =∑(f(X i )*Z i ) to obtain the particle impact value P of the raw material sample KD , where f(i) = w - (ij / 2) 2 , w is a preset constant value; Get the content impact value P HD , density value ρ TD , total mass m1 and particle impact value P KD , substitute into the formula Calculate and get the period prediction value T all , where λ1 is the preset proportional coefficient, T0 is the preset fixed period value, N1 is the limit constant, Indicates that the value is not greater than The maximum integer of the period prediction value T all Completes required cycle as compost.

3. The method for aerobic composting of organic waste according to claim 2, characterized in that: The period prediction value T all Divided into three temperature change intervals, the division process is: Get the total mass m1 and content impact value P HD And the period prediction value T all , substitute the total mass m1 into the formula Calculation is performed in , T1′ is the preset heating stage cycle value, m0 is the preset basic weight value, and the first stage distinction value T1 is obtained; The content affects the value P HD and the periodic forecast value T all Substitute into the formula Calculation is performed to obtain the second stage distinction value T2, where λ2 is a preset proportionality coefficient; The period prediction value T all It is divided into the temperature rise interval [0, T1], the high temperature interval [T1, T2] and the low temperature interval [T2, T all ], turn the pile within the time range of high temperature range and low temperature range.

4. The method for aerobic composting of organic waste according to claim 3, characterized in that: The compost turning confirmation unit is used to adjust and correct the compost turning cycle, and the specific process is as follows: In the high temperature range [T1, T2] and the low temperature range [T2, T all ] range, and record them as fast turning cycle and slow turning cycle respectively, obtain the internal temperature of the pile and draw a line graph of the internal temperature change over time, at the initial moment of the fast turning cycle and the slow turning cycle, obtain the content proportion of fat, protein, carbohydrate, lignin and cellulose in the pile sample, and correct the turning cycle accordingly; When the compost is turned, T all If the pile is not fully decomposed after a certain period of time, continue turning the pile.

5. The method for aerobic composting of organic waste according to claim 4, characterized in that: The process of correcting the initial time of the rapid compost turning cycle is: At time T1 after the start of composting, a line graph of the internal temperature change over time on the previous day is obtained, each point in the line graph is analyzed, the slope between two adjacent points is calculated, multiple slope values ​​are obtained, and the average value is calculated to obtain a first slope analysis value; When the current internal temperature of the pile is greater than the temperature threshold, the rapid pile turning cycle [T1, T2] is taken as the actual rapid cycle; When the first slope analysis value is greater than or equal to the preset slope threshold, and the current internal temperature of the pile is less than the temperature threshold, the proportions of carbohydrates, proteins, and fats in the current pile sample are recorded as P1′, P2′, and P3′, respectively, and substituted into the formula Calculate the first cycle correction value T1′, where k′ is the preset proportional coefficient. The actual rapid cycle after correction is [T1′, T2]. In the actual rapid cycle, the turning time interval is set to T a , T a is the default value.

6. The method for aerobic composting of organic waste according to claim 5, characterized in that: The process of correcting the initial time of the slow compost turning cycle is: At time T2 after the start of composting, a line graph of the internal temperature change over time in the past day is obtained and each point in the line graph is analyzed, the slope between two adjacent points is calculated, multiple slope values ​​are obtained, and the average value is calculated to obtain a second slope analysis value; When the current internal temperature of the pile is lower than the temperature threshold, the slow turning cycle [T2, T all ] as the actual slow cycle; When the first slope analysis value is less than or equal to the preset slope threshold, and the current internal temperature of the pile is greater than the temperature threshold, the proportion of lignin and cellulose in the current pile sample is recorded as P4' and P5' respectively, and substituted into the formula The second period correction value T2′ is calculated and the actual slow period after correction is [T2′, T all ], set the turning time interval to T in the actual slow cycle b , T b is the preset value, T b Greater than T a .

7. The method for aerobic composting of organic waste according to claim 1, characterized in that: Also included is an interval adjustment unit; The interval adjustment unit adjusts the time interval of the compost turning within the corrected rapid compost turning cycle, performs the first compost turning at the initial moment and records the compost turning as the compost turning sequence Fd0, and records each subsequent compost turning as Fd n , n∈(1,2,…,m), n is the sequence number of the pile turning, and m+1 is the total number of pile turnings in the actual fast cycle; Assume that the adjusted two consecutive compost turnings Fd n-1 and Fd n The time interval is Determine the time interval based on the various gas components in the pile 8. The method for aerobic composting of organic waste according to claim 7, characterized in that: Time interval The determination process is as follows: During the interval between two consecutive compost turnings, the concentrations of oxygen, dimethyl sulfide, ammonia and nitrous oxide in the compost were regularly obtained and recorded as β0, β S , Substitute into the formula Calculate in and get the anaerobic concentration value α; A line graph of the anaerobic concentration α changing with time is drawn, and the fitted straight line α = a*t+b is obtained by linear fitting, where t represents the time of recording and the time of turning the compost Fd n-1 The interval between moments, a and b are both constant values; Substitute the preset anaerobic concentration threshold α′ into the formula to calculate t′, and take the largest integer not greater than t′ as

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