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Airflow field simulation model building and application for aerobic compost using CFD

International Journal of agricultural and Biological Engineering 2021年第4期14卷 245-254页

作者： Qiongyi Cheng Haibo Meng Haibin Zhou Yujun Shen Hongsheng Cheng Jingtao Ding Shihao Zhao Shance Hou Academy of Agricultural Planning and Engineering Key Laboratory of Technologies and Models for Cyclic Utilization from Agricultural ResourcesMinistry of Agriculture and Rural AffairsBeijing 100125China

Composting is a suitable low-cost strategy to transform animal waste into a stabilized end product,and the airflow field in the pile affects the fermentation *** piles in the aeration weak zone,anaerobic fermentation may happen as the lack of *** in practice,due to the extremely low speed and harsh condition,the airflow field was scarcely *** study adopted Computational Fluid Dynamics(CFD)to investigate the airflow field in the compost pile.A three-dimensional CFD model was built;the compost pile in this model was simplified as porous media;unstructured mesh was adopted to discretize the geometric model;standard k-εmodel and SIMPLE scheme were employed for numerical *** CFD model was validated with the field experiment in the cooling *** the model was applied to research the airflow field in the pile with increased pipe *** showed that it was feasible to investigate the airflow field in the pile with *** boundary conditions in the CFD model,treating the compost pile as a homogeneous porous media is *** CFD model was successfully validated by the field measurement(the average relative difference between the simulated and measured air speed was within 10%).Airflow in the existing compost pile showed nonuniform distribution with stagnation and vortex zones;the turbulence intensities were 3.57 and 1.43 for the airflow in the pile and the reactor,*** pipe diameter increased,the airflow distribution uniformity in the pile was improved *** diameter raising to 0.04 m,the turbulence intensity decreased to 1.54 and 0.42 for the airflow in the pile and the reactor,*** CFD model developed in this research can provide qualitative and quantitative analyses of the airflow field in compost piles,and can be a theoretical basis for the aeration system design.

关键词： CFD model building compost airflow field pile

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Effects of lead pollution on soil microbial community diversity and biomass and on invertase activity

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Soil Ecology Letters 2023年第1期5卷 118-127页

作者： Xin Sun Mingjie Sun Ying Chao Xiaoyang Shang Hui Wang Hong Pan Quangang Yang Yanhong Lou Yuping Zhuge National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources College of Resources and EnvironmentShandong Agricultural UniversityTai’an 271018China Tai’an Hi-Tech Industrial Development Zone Tai’an 271000China Rizhao Municipal Bureau of Agricultural and Rural Affairs Rizhao 276800China Key Laboratory of Technologies and Models for Cyclic Utilization from Agricultural Resources Ministry of Agriculture and Rural AffairsBeiJing 100125China

Lead(Pb)pollution is one of the most widespread and harmful environmental problems *** of changes in soil properties and microbial functional diversity due to land use is needed to establish a basis for remediation of soil *** study aimed to investigate soils contaminated by Pb from different sources and to analyze the functional diversity and metabolism of soil microbial communities using Biolog *** pollution(>300 mg kg-1)significantly influenced the diversity and metabolic functions of soil microbial ***,Pb contamination significantly reduced soil microbial biomass carbon(C)and nitrogen(N)levels and catalase activity while increasing invertase ***,Biolog EcoPlate assays revealed that Pb pollution reduced the general activities of soil microorganisms,suppressing their ability to utilize C *** Pb-contaminated areas lacking vegetation cover,Shannon,Simpson,and McIntosh diversity indices of soil microorganisms were significantly *** microbial diversity and biomass C and N levels were affected by land use and soil properties,respectively,whereas soil enzyme activity was primarily affected by the interaction between land use and soil *** results provide a reference and a theoretical basis for developing soil quality evaluation and remediation strategies.

关键词： Lead pollution Biolog Microbial functional diversity Soil enzyme activities Environment toxicity

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The Impact of a Novel Fe-Btc/Biochar Material on Nitrogen Conversion in Electric Field Compost and its Microbial Driving Mechanism

SSRN

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SSRN 2024年

作者： Zhang, Yang Zhang, Dongli Ding, Jingtao Zhou, Haibin Cai, Huiwu Zhou, Wenying Cheng, Hongsheng Feng, Qikun Cheng, Qingyi Zhang, Yun Zhang, Pengyue Ma, Shuangshuang Shen, Yujun Institute of Energy and Environmental Protection Academy of Agricultural Planning & Engineering Ministry of Agriculture and Rural Affairs Beijing100125 China Key Laboratory of Technologies and Models for Cyclic Utilization from Agricultural Resources Ministry of Agriculture and Rural Affairs Beijing100125 China School of Chemistry and Chemical Engineering Xi’an University of Science & Technology Xi’an710054 China State Key Laboratory of Power Systems Department of Electrical Engineering Tsinghua University Beijing100084 China

Electric field-assisted composting technology is a novel and efficient approach to composting. however, it has various challenges, such as the emission of nitrogenous gases and limited electrical conductivity. The development of novel additives is a potential way to resolve this problem. In this study, a novel additive Fe-BTC/BC was developed and its effects on nitrogenous gas emissions was examined during electric field-assisted composting. The result indicated that incorporating Fe-BTC/BC reduced NH3 and N2O emissions by 47.05% and 19.83%, respectively, compared with that of the control, and led to an increase in peak temperature from 66.4 ℃ to 71.2 ℃ and a shortened composting period from 16 d to 9 d. Microbiological analysis indicated that Fe-BTC/BC enhanced the abundance of nitrifying functional microbes, such as Bacillus (from 24.09% to 27.18%), and reduced that of denitrifying functional microbes (from 5.08% to 3.91%). RDA indicated that NH3 emission is in connection with nitrifying microbes (Clostridium_sensu_stricto_1, Corynebacterium). In addition, reduction-oxidation (REDOX) activity was enhanced and electron transfer was accelerated upon the addition of Fe-BTC/BC. These findings indicate that Fe-BTC/BC has a synergistic effect that improves nitrogen conversion efficiency by altering the abundance of microorganisms and accelerating electron transfer. This study provides an important scientific basis for the development of novel materials to reduce the emission of nitrogenous gases during electric field-assisted composting. © 2024, The Authors. All rights reserved.

关键词： Electric fields

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Heavy metals and community structure of microorganism changes during livestock manure composting with inoculation of effective microorganisms

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International Journal of agricultural and Biological Engineering 2020年第6期13卷 125-132页

作者： Haibin Zhou Yujun Shen Ran Li Haibo Meng Xi Zhang Jian Wang Hongsheng Cheng Shanshan Dong Liqiu Song Jingtao Ding Qiongyi Cheng Academy of Agricultural Planning&Engineering Ministry of Agriculture and Rural Affairs of the People's Republic of ChinaBeijing 100125China Key Laboratory of Technologies and Models for Cyclic Utilization from Agricultural Resources Ministry of Agriculture and Rural Affairs of the People's Republic of ChinaBeijing 100125China

Effective microorganisms(EM)is usually used in composting to improve the composting ***,the effect of EM on heavy metals evolution was still *** study was performed to illustrate the microbial community changes that occur during composting with the addition of EM and to determine the evolution of heavy metal speciation during this *** requirement of harmlessness for pig manure was met after the addition of EM at a dosage of 0.5%,with a germination index of 96.42%.The bacterial and fungal diversity were both found to decrease during the composting ***,the bioavailability of Cu and Pb decreased significantly during *** correlations were observed between the microbial composition and the percentage of different heavy metals fractions;however,the mechanism responsible for this correlation requires further *** study has the potential to contribute to control of heavy metal contamination during the process of recycling pig manure through the controlled addition of EM.

关键词： effective microorganisms heavy metal microbial communities pig manure composting

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The Impact of a Novel Fe-Btc/Bc Material on Nitrogen Conversion in Electric Field Compost and its Microbial Driving Mechanism

SSRN

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SSRN 2023年

作者： Zhang, Yang Zhang, Dongli Ding, Jingtao Zhou, Haibin Cai, Huiwu Zhou, Wenying Cheng, Hongsheng Feng, Qikun Cheng, Qingyi Zhang, Pengyue Zhang, Yun Ma, Shuangshuang Shen, Yujun Institute of Energy and Environmental Protection Academy of Agricultural Planning & Engineering Ministry of Agriculture and Rural Affairs Beijing100125 China Key Laboratory of Technologies and Models for Cyclic Utilization from Agricultural Resources Ministry of Agriculture and Rural Affairs Beijing100125 China School of Chemistry and Chemical Engineering Xi’an University of Science & Technology Xi’an710054 China State Key Laboratory of Power Systems Department of Electrical Engineering Tsinghua University Beijing100084 China China Agricultural University China

Electric field assisted composting technology is a novel and efficient approach to composting;however, it still faces many challenges, such as the emission of nitrogenous gas and limited electrical conductivity. The objective of this study was to develop a novel additive (Fe-BTC/BC) and examine its effect on nitrogenous gas emissions during electric field assisted composting. The results demonstrated that incorporating Fe-BTC/BC reduced NH3 and N2O emissions by 47.05% and 19.83%, respectively, compared to control check CK. Microbiological analysis indicated that Fe-BTC/BC enhanced the abundance of nitrifying functional microbes, such as Bacillus, and decreased the abundance of denitrifying functional microbes. In addition, DOX activity was enhanced by Fe-BTC/BC. These findings indicate that Fe-BTC/BC has a synergistic effect that facilitates nitrogen conversion efficiency by altering the abundance of microorganisms and accelerating electron transfer. This study provides an important scientific basis for the development of novel materials to reduce the emission of nitrogenous gases in electric assisted compost. © 2023, The Authors. All rights reserved.

关键词： Electric fields

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Study on dynamic sorption characteristics of modified biochars for ammonium in biogas slurry

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International Journal of agricultural and Biological Engineering 2020年第1期13卷 234-240页

作者： Jingtao Ding Yujun Shen Yanru Ma Haibo Meng Hongsheng Cheng Xi Zhang Jian Wang Pengyue Zhang Institute of Energy and Environmental Protection Academy of Agricultural Planning&EngineeringMinistry of Agriculture and Rural AffairsBeijing 100125China Key Laboratory of Technologies and Models for Cyclic Utilization from Agricultural Resources Ministry of Agriculture and Rural AffairsBeijing 100125China College of Engineering Huazhong Agricultural UniversityWuhan 430070China

The objective of this study was to investigate the relationship between ammonium(NH^(+)_(4)-N)dynamic sorption capacity and physicochemical properties of modified ***,producing from three species of agricultural wastes of cornstalk(A),corncob(B)and sawdust(C)at 550°C,600°C and 650°C,were modified by four methods of NaOH plus microwave(NaM),KOH(K),FeCl 3(Fe)and HNO 3(H).The static and dynamic adsorption experiments were conducted to investigate sorption characteristics of modified biochars on NH^(+)_(4)-N in slurry of piggery manure anaerobic *** modified biochars with better NH^(+)_(4)-N adsorption rates were selected through static kinetics adsorption tests,which showed that chemical reactions might have occurred during the NH^(+)_(4)-N sorption process and the maximum NH^(+)_(4)-N removal rates of B-550-Fe,A-550-NaM,A-550-K and C-600-NaM were 66.64%,57.50%,52.39%and 45.20%,*** dynamic adsorption column experiment was conducted in a three-stage adsorption column packed with the selected three modified ***^(+)_(4)-N dynamic adsorption depended on the slurry inflow flow rate,the type of biochar and the depth of packed *** optimal adsorption process was elected by the method of orthogonal *** data showed that using deeper packed biochar and applying lower flow rates could be a better strategy to increase NH^(+)_(4)-N *** maximum NH^(+)_(4)-N removal rate in the slurry could reach 85.60%in the three-stage adsorption *** concluded that NH^(+)_(4)-N adsorption in three-stage adsorption process could be an effective method to recover nitrogen from piggery manure anaerobic digestate.

关键词： modified biochar biogas slurry ammonium adsorption sorption characteristics

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Investigation and analysis of the linkage mechanism and whole process cost of livestock manure organic fertilizer

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International Journal of agricultural and Biological Engineering 2020年第2期13卷 223-227页

作者： Shanshan Dong Bin Sui Yujun Shen Haibo Meng Lixin Zhao Jingtao Ding Haibin Zhou Xi Zhang Hongsheng Cheng Jian Wang Ran Li Liqiu Song Pengxiang Xu Ji Li Institute of Energy and Environmental Protection Academy of Agricultural Planning and EngineeringMinistry of Agriculture and Rural AffairsBeijing 100125China Key Laboratory of Technologies and Models for Cyclic Utilization from Agricultural Resources Ministry of Agriculture and Rural AffairsBeijing 100125China Key Laboratory of Energy Resource Utilization from Agriculture Waste Ministry of Agriculture and Rural AffairsBeijing 100125China College of Resources and Environmental Sciences China Agricultural UniversityBeijing 100193China

In recent years,the utilization of manure resources for livestock and poultry farming has attracted a widespread attention,and manure resources utilization models suitable for different regional characteristics have formed *** them,the production of organic fertilizer from animal manure is a vital utilization ***,there are still some problems such as high production costs,difficult sales,and the unwillingness of farmers to use organic fertilizers which have affected the breeding cycle and the sustainability of manure treatment in livestock and poultry *** article selected 371 organic fertilizer plants,related farms and farmers in China,focusing on the main links of the entire process of livestock manure-organic fertilizer-farm application,and studied the mode of animal manure collection by organic fertilizer *** costs of organic fertilizer production and farmland application were ***,suggestions were made for the promotion and implementation of large-scale organic fertilizers to make good utilization of manure resources in livestock and poultry farming.

关键词： livestock manure organic fertilizer compost production cost application cost

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Metagenome analysis reveals potential microbial functions in topsoil of wheat-maize rotation system with five-year application of fertilizers

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International Journal of agricultural and Biological Engineering 2019年第6期12卷 177-184页

作者： Yujun Shen Lixin Zhao Haibo Meng Hongsheng Cheng Jingtao Ding Jiarui Wang Shanshan Dong Xi Zhang Liqiu Song Shengwei Zheng Institute of Energy and Environmental Protection Chinese Academy of Agricultural EngineeringBeijing 100125China Key Laboratory of Technologies and Models for Cyclic Utilization from Agricultural Resources Ministry of AgricultureBeijing 100125China Key Laboratory of Energy Resource Utilization from Agriculture Residue Ministry of AgricultureBeijing 100125China

Fertilization mode affects soil quality and ecological *** effects of four fertilization regimens on lignocellulose content,readily degradable carbohydrate decomposition,and potential microbial functions in the topsoil of a wheat-maize rotation system between 2012 and 2017 were *** fertilization regimens of control(control NFNB),high chemical fertilizer(HCF),high biochar plus low chemical fertilizer(HBLCF),and biochar-based fertilizer(BBF)were compared on soil fundamental properties,microbial structure,and potential function in soil carbohydrate degradation based on metagenome *** diversity of carbohydrate-active enzyme genes in the topsoil microbial consortia in the four trials was primarily distributed within the ten ecologically most dominant *** of BBF was associated with the lowest decline in total nitrogen and P2O5(2012-2017:6.5%and 28.1%,respectively)and the most effective carbohydrate decomposition(2015-2017:67.0%for cellulose and 59.9%for readily degradable carbohydrate).Carbohydrate transport and metabolism accounted for 6.0%of reads assigned functional classification under the BBF *** findings reveal the ecologically functional diversity of topsoil microorganisms and suggest BBF application as a promising strategy for sustainable agriculture and beneficial to soil health.

关键词： biochar-based fertilizer carbohydrate decomposition genetic function microbial community topsoil

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Effects of high-concentration sulfamethoxazole on antibiotic resistance genes during swine manure aerobic composting

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Journal of Environmental Chemical Engineering 2025年第4期13卷

作者： Shuangshuang Ma Li Wang Jingtao Ding Haibin Zhou Yujun Shen Jian Wang Yanxin Chen Yan Yang Institute of Energy and Environmental Protection Academy of Agricultural Planning & Engineering Ministry of Agriculture and Rural Affairs Beijing 100125 China Key Laboratory of Technologies and Models for Cyclic Utilization from Agricultural Resources Ministry of Agriculture and Rural Affairs Beijing 100125 China Key Laboratory for Crop and Animal Integrated Farming Ministry of Agriculture and Rural Affairs Nanjing 210014 China Jiangsu Academy of Agricultural Sciences Nanjing 210014 China

Sulfamethoxazole (SMX) is a common antibiotic used in animal manure with high stability and a long half-life. The long-term presence of SMX in animal manure affects the resource utilization of feces and leads to the continuous enrichment and expression of antibiotic resistance genes (ARGs), which pose a serious threat to ecosystems. Aerobic composting is an effective method for reducing SMX and ARGs in manure. However, the impact of higher concentrations of SMX in livestock manure on the reduction of ARGs during aerobic composting remains unclear. This study explored the effects of higher SMX concentrations on the reduction of ARGs during aerobic swine manure composting. The results showed that the degradation rate of SMX reached 97.78 % after composting and the total ARG reduction rate under SMX treatment decreased by 12.71 % compared with that of the control, indicating that the presence of SMX was not conducive to the reduction of total ARGs. Moreover, the abundances of sulfonamide resistance genes sul1 , sul2 and sul4 decreased but sul3 increased. Temperature, moisture content, carbon–nitrogen ratio, Actinomadura , Ruminofilibacter , and integrative conjugative elements were the key factors affecting the reduction of total ARGs. Further analysis using partial least squares path modeling revealed that SMX mainly reduced the vertical or horizontal transfer risk of total ARGs by altering the microorganisms and integrative conjugative elements. In summary, the presence of SMX in manure increases the risk of ARG transmission in compost products. These results have theoretical and experimental implications for controlling typical antibiotic pollution in livestock manure.

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Neutral initial pH enhances the formation of humic acid by inhibiting the growth of Lactobacillus in food waste composting

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Environmental Technology and Innovation 2025年 39卷

作者： Xu, Min Wei, Yuquan Chen, Yunfeng Zhou, Haibin Ma, Shuangshuang Zhan, Yabin Institute of Plant Protection and Soil Fertilizer Hubei Academy of Agricultural Sciences Key Laboratory of Fertilization From Agricultural Wastes Ministry of Agriculture and Rural Affairs Hubei Wuhan430064 China College of Resources and Environmental Science Beijing Key Laboratory of Biodiversity and Organic Farming China Agricultural University Beijing100193 China of China Agricultural University Wuzhong District Suzhou215128 China Key Laboratory of Technologies and Models for Cyclic Utilization from Agricultural Resources Ministry of Agriculture and Rural Affairs P. R. China Beijing100125 China

Composting was the main way to treat food waste and achieve its resource utilization, but the fermentation of food waste could easily produce acid, which affects the microbial community of composting. As of now, the impact of this process on humification was still unclear. This study investigated the effects of initial pH on humic acid formation during food waste (FW) composting, as well as the microbial regulatory mechanisms under pH conditions of 5.0, 6.0 and 7.0. Our study investigated that adjusting the initial pH to 6.6, especially in 7.0, promoted total organic carbon degradation and compost maturation, as indicated by germination index and decreased electrical conductivity. However, higher pH levels also increased total nitrogen loss. Adjusting the pH to 6.0 or 7.0 facilitated the conversion of reducing sugars, amino acids and polyphenols into humic acid and promoted the formation of complex HA components. Our results also indicated that pH regulation inhibited Lactobacillus growth, reshaped bacterial composition, influenced amino acid and polyphenol dynamics, and ultimately enhanced humic acid formation in initial pH of 6.0, especially in initial pH 7.0. from a cost perspective, it was recommended to adjust the initial pH of food waste to 6.0 for composting. © 2025 The Authors

关键词： Refuse composting

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