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Article ; Online: Pyrolysis recycling of pig manure biochar adsorption material for decreasing ammonia nitrogen in biogas slurry.

He, Lintong / Wang, Dehan / Zhu, Tianlang / Lv, Yongzhen / Li, Sicheng

2023 Volume 881, Page(s) 163315

Abstract: Biochar adsorption materials have a good removal effect on ammonia nitrogen in piggery biogas slurry. However, the cost of biochar adsorption material is still high. If these materials can be recycled several times, the cost can be significantly reduced. ...

Abstract	Biochar adsorption materials have a good removal effect on ammonia nitrogen in piggery biogas slurry. However, the cost of biochar adsorption material is still high. If these materials can be recycled several times, the cost can be significantly reduced. Therefore, this paper investigated a new process of biochar adsorption material (C@Mg-P) pyrolysis cycle for reducing ammonia nitrogen in piggery biogas slurry. The effects of pyrolysis process conditions (pyrolysis temperature and pyrolysis time) and number of recycling times on reducing ammonia nitrogen in biogas slurry by C@Mg-P were studied, a preliminary investigation on the reaction mechanism of C@Mg-P for reducing ammonia nitrogen in biogas slurry was conducted, and the economic feasibility of the pyrolysis recycling process was analyzed. It was found that the NH
MeSH term(s)	Animals ; Swine ; Ammonia/analysis ; Manure ; Biofuels ; Adsorption ; Pyrolysis ; Charcoal ; Nitrogen/analysis
Chemical Substances	biochar ; Ammonia (7664-41-7) ; Manure ; Biofuels ; Charcoal (16291-96-6) ; Nitrogen (N762921K75)
Language	English
Publishing date	2023-04-05
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	121506-1
ISSN	1879-1026 ; 0048-9697
ISSN (online)	1879-1026
ISSN	0048-9697
DOI	10.1016/j.scitotenv.2023.163315
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Article ; Online: Pyrolysis recycling of pig manure biochar adsorption material for decreasing ammonia nitrogen in biogas slurry

He, Lintong / Wang, Dehan / Zhu, Tianlang / Lv, Yongzhen / Li, Sicheng

Science of the Total Environment. 2023 July, v. 881 p.163315-

2023

Abstract	Biochar adsorption materials have a good removal effect on ammonia nitrogen in piggery biogas slurry. However, the cost of biochar adsorption material is still high. If these materials can be recycled several times, the cost can be significantly reduced. Therefore, this paper investigated a new process of biochar adsorption material (C@Mg-P) pyrolysis cycle for reducing ammonia nitrogen in piggery biogas slurry. The effects of pyrolysis process conditions (pyrolysis temperature and pyrolysis time) and number of recycling times on reducing ammonia nitrogen in biogas slurry by C@Mg-P were studied, a preliminary investigation on the reaction mechanism of C@Mg-P for reducing ammonia nitrogen in biogas slurry was conducted, and the economic feasibility of the pyrolysis recycling process was analyzed. It was found that the NH₃-N elimination efficiency by C@Mg-P was 79.16 % under the optimal conditions of 0.5 h and 100 °C. Second, C@Mg-P removed 70.31 % NH₃-N after recycling 10 times. Chemical precipitation, ion exchange, physical adsorption and electrostatic attraction were the potential reaction mechanisms for NH₃-N reduction by C@Mg-P. Moreover, C@Mg-P had a good decolorization effect on piggery biogas slurry with a 72.56 % decolorization rate. Compared with the non-pyrolyzed recycling process, the proposed process saved 80 % of the cost, thus representing an economically possible approach for pig manure biochar application in wastewater denitrification treatment.
Keywords	adsorption ; ammonium nitrogen ; biochar ; biogas ; chemical precipitation ; decolorization ; denitrification ; economic feasibility ; electrostatic interactions ; environment ; ion exchange ; pig manure ; pyrolysis ; reaction mechanisms ; slurries ; temperature ; wastewater ; Biochar adsorption material ; Biogas slurry
Language	English
Dates of publication	2023-07
Publishing place	Elsevier B.V.
Document type	Article ; Online
ZDB-ID	121506-1
ISSN	1879-1026 ; 0048-9697
ISSN (online)	1879-1026
ISSN	0048-9697
DOI	10.1016/j.scitotenv.2023.163315
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Effects of biochar combined with MgO desulfurization waste residue on nitrogen conversion and odor emission in chicken manure composting.

Pang, Yuwan / Zhen, Feng / Wang, Dehan / Luo, Zifeng / Huang, Jianfeng / Zhang, Yanli

Environmental technology

2023 , Page(s) 1–12

Abstract: Aim: ...

Abstract	Aim:
Language	English
Publishing date	2023-11-16
Publishing country	England
Document type	Journal Article
ISSN	1479-487X
ISSN (online)	1479-487X
DOI	10.1080/09593330.2023.2283086
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article: Ultrafiltration concentrated biogas slurry can reduce the organic pollution of groundwater in fertigation

Zeng, Weishen / Qiu, Jinrong / Wang, Dehan / Wu, Zhaoyun / He, Lintong

Science of the total environment. 2022 Mar. 01, v. 810

2022

Abstract: Biogas slurry has the problems of having a low concentration, having a large production volume, and containing many small-molecule organic pollutants. During the fertigation process of biogas slurry, many small-molecule organic pollutants may pose ... ...

Abstract	Biogas slurry has the problems of having a low concentration, having a large production volume, and containing many small-molecule organic pollutants. During the fertigation process of biogas slurry, many small-molecule organic pollutants may pose potential pollution risks to groundwater. In this study, the ultrafiltration membrane technology was used to separate small-molecule organics in the biogas slurry to prepare ultrafiltration concentrated biogas slurry (UCBS). To research the impact of UCBS and raw biogas slurry (RBS) on the small-molecule organic pollution of groundwater, a laboratory soil column simulation leaching device was used to conduct leaching experiments with 4 types of UCBS and RBS in acric ferralsols and hydragric anthrosols for two quarters (8 fertilization periods). The results of the study show that both UCBS and RBS caused nitrate pollution to groundwater. UCBS has a lower risk of organic pollution to groundwater than RBS. Irrigating UCBS in hydragric anthrosols has a higher risk of organic pollution of groundwater than that in acric ferralsols. Analysis of the molecular weight distribution of dissolved organic matter (DOM) in the leaching solution showed that the organic pollutants were mainly small molecules <10 kDa. According to 3D excitation-emission matrix (3D-EEM) analysis, the main organic pollutants in the leaching solution were fulvic acid, microbial protein metabolites and humic acid organic compounds. The research results show that the pretreatment of biogas slurry by ultrafiltration can reduce the risk of small-molecule organic pollution of groundwater in land application, which can provide a new scientific basis to standardize biogas slurry land application technical guidelines and reduce groundwater pollution.
Keywords	Anthrosols ; Ferralsols ; biogas ; dissolved organic matter ; environment ; fertigation ; fulvic acids ; groundwater ; groundwater contamination ; humic acids ; land application ; metabolites ; molecular weight ; nitrates ; risk ; risk reduction ; slurries ; ultrafiltration
Language	English
Dates of publication	2022-0301
Publishing place	Elsevier B.V.
Document type	Article
ZDB-ID	121506-1
ISSN	1879-1026 ; 0048-9697
ISSN (online)	1879-1026
ISSN	0048-9697
DOI	10.1016/j.scitotenv.2021.151294
Database	NAL-Catalogue (AGRICOLA)

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Article: Magnesium-modified biochar was used to adsorb phosphorus from wastewater and used as a phosphorus source to be recycled to reduce the ammonia nitrogen of piggery digestive wastewater

He, Lintong / Wang, Dehan / Wu, Zhaoyun / Lv, Yongzhen / Li, Sicheng

Journal of cleaner production. 2022 Aug. 01, v. 360

2022

Abstract: High concentrations of ammonia nitrogen in piggery digestive wastewater are toxic to the microorganisms in wastewater treatment systems. The ammonia nitrogen load can be decreased by struvite precipitation. The purpose of this paper was to take phosphate ...

Abstract	High concentrations of ammonia nitrogen in piggery digestive wastewater are toxic to the microorganisms in wastewater treatment systems. The ammonia nitrogen load can be decreased by struvite precipitation. The purpose of this paper was to take phosphate from magnesium-modified biochar adsorbed wastewater as a phosphorus source and add it to biogas slurry to reduce the ammonia nitrogen concentration. The effects of phosphorus source dosage, initial reaction pH value and reaction time on ammonia nitrogen removal from biogas slurry were investigated, and then the subsequent biogas slurry underwent sequencing batch reactor biochemical treatment. When the phosphorus source dosage was 20 g/L, initial reaction pH value was 10.0 and reaction time was 1 h, the NH₃–N recovery was 62.98%. The subsequent biogas slurry met the discharge standards (DB44/613–2009) after biochemical treatment. An innovative process for the recycling of pig farm waste, nitrogen and phosphorus recovery and advanced treatment of biogas slurry is first proposed in this paper.
Keywords	agricultural wastes ; ammonium nitrogen ; batch systems ; biochar ; biogas ; magnesium ammonium phosphate ; nitrogen ; pH ; phosphorus ; slurries ; swine ; toxicity ; wastewater ; wastewater treatment
Language	English
Dates of publication	2022-0801
Publishing place	Elsevier Ltd
Document type	Article
ISSN	0959-6526
DOI	10.1016/j.jclepro.2022.132130
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Article ; Online: Removal of refractory organics from piggery bio-treatment effluent by the catalytic ozonation process with piggery biogas residue biochar as the catalyst.

Luo, Zifeng / Wang, Dehan / Zeng, Weishen / Yang, Jie

The Science of the total environment

2020 Volume 734, Page(s) 139448

Abstract: After anaerobic-oxic (A/O) treatment, there are often high chromaticity levels in piggery bio-treatment effluents, which still contain a high concentration of refractory organics. This paper describes the use of piggery biogas residue biochar (BioC) to ... ...

Abstract	After anaerobic-oxic (A/O) treatment, there are often high chromaticity levels in piggery bio-treatment effluents, which still contain a high concentration of refractory organics. This paper describes the use of piggery biogas residue biochar (BioC) to support MnO
MeSH term(s)	Biofuels ; Charcoal ; Manganese Compounds ; Oxides ; Ozone ; Water Pollutants, Chemical ; Water Purification
Chemical Substances	Biofuels ; Manganese Compounds ; Oxides ; Water Pollutants, Chemical ; biochar ; Charcoal (16291-96-6) ; Ozone (66H7ZZK23N)
Language	English
Publishing date	2020-05-21
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	121506-1
ISSN	1879-1026 ; 0048-9697
ISSN (online)	1879-1026
ISSN	0048-9697
DOI	10.1016/j.scitotenv.2020.139448
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Zs.A 949: Show issues

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Jg. 1995 - 2021: Lesesall (1.OG)
ab Jg. 2022: Lesesaal (EG)

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Article ; Online: Ultrafiltration concentrated biogas slurry can reduce the organic pollution of groundwater in fertigation.

Zeng, Weishen / Qiu, Jinrong / Wang, Dehan / Wu, Zhaoyun / He, Lintong

The Science of the total environment

2021 Volume 810, Page(s) 151294

Abstract	Biogas slurry has the problems of having a low concentration, having a large production volume, and containing many small-molecule organic pollutants. During the fertigation process of biogas slurry, many small-molecule organic pollutants may pose potential pollution risks to groundwater. In this study, the ultrafiltration membrane technology was used to separate small-molecule organics in the biogas slurry to prepare ultrafiltration concentrated biogas slurry (UCBS). To research the impact of UCBS and raw biogas slurry (RBS) on the small-molecule organic pollution of groundwater, a laboratory soil column simulation leaching device was used to conduct leaching experiments with 4 types of UCBS and RBS in acric ferralsols and hydragric anthrosols for two quarters (8 fertilization periods). The results of the study show that both UCBS and RBS caused nitrate pollution to groundwater. UCBS has a lower risk of organic pollution to groundwater than RBS. Irrigating UCBS in hydragric anthrosols has a higher risk of organic pollution of groundwater than that in acric ferralsols. Analysis of the molecular weight distribution of dissolved organic matter (DOM) in the leaching solution showed that the organic pollutants were mainly small molecules <10 kDa. According to 3D excitation-emission matrix (3D-EEM) analysis, the main organic pollutants in the leaching solution were fulvic acid, microbial protein metabolites and humic acid organic compounds. The research results show that the pretreatment of biogas slurry by ultrafiltration can reduce the risk of small-molecule organic pollution of groundwater in land application, which can provide a new scientific basis to standardize biogas slurry land application technical guidelines and reduce groundwater pollution.
MeSH term(s)	Biofuels ; Dissolved Organic Matter ; Groundwater ; Soil ; Ultrafiltration
Chemical Substances	Biofuels ; Dissolved Organic Matter ; Soil
Language	English
Publishing date	2021-10-29
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	121506-1
ISSN	1879-1026 ; 0048-9697
ISSN (online)	1879-1026
ISSN	0048-9697
DOI	10.1016/j.scitotenv.2021.151294
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Influence of reflux ratio on the anaerobic digestion of pig manure in leach beds coupled with continuous stirred tank reactors.

Yang, Jie / Wang, Dehan / Luo, Zifeng / Zeng, Weishen

Waste management (New York, N.Y.)

2019 Volume 97, Page(s) 115–122

Abstract: The effect of reflux ratio on the anaerobic mono-digestion of pig manure (PM) in leach beds coupled with continuous stirred tank reactors (CSTRs) has been studied in this work, and contents of volatile fatty acids (VFAs) and biogas yields were determined ...

Abstract	The effect of reflux ratio on the anaerobic mono-digestion of pig manure (PM) in leach beds coupled with continuous stirred tank reactors (CSTRs) has been studied in this work, and contents of volatile fatty acids (VFAs) and biogas yields were determined for three groups of leach bed reactor (LBR) - CSTR systems. The obtained results indicated that the reflux of biogas slurry increased both the pH of the acid-producing phase and acetic acid yield and repeatedly degraded the refractory organic matter in the biogas slurry. The larger reflux ratio increased the inoculation volume and substantially enhanced the mass transfer process. The maximum values of the biogas and methane yields equal to 259.49 and 167.44 mL/g volatile solids, respectively, were achieved at a reflux ratio of 100%. Moreover, the weight of the PM leachate residue was reduced by 94.14%, and the total nutrient content (N + P
MeSH term(s)	Anaerobiosis ; Animals ; Biofuels ; Bioreactors ; Manure ; Methane ; Swine
Chemical Substances	Biofuels ; Manure ; Methane (OP0UW79H66)
Language	English
Publishing date	2019-08-07
Publishing country	United States
Document type	Journal Article
ZDB-ID	2001471-5
ISSN	1879-2456 ; 0956-053X
ISSN (online)	1879-2456
ISSN	0956-053X
DOI	10.1016/j.wasman.2019.08.005
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Article: Anaerobic mono-digestion of pig manure in a leach bed coupled with a methanogenic reactor: Effects of the filter media

Yang, Jie / Luo, Zifeng / Wang, Dehan / Zeng, Weishen

Journal of cleaner production. 2019 Oct. 10, v. 234

2019

Abstract: This work pioneered the efficient coupling of a leach bed reactor (using a filter medium and no anaerobic sludge) and a continuous stirred-tank reactor (LBR-CSTR) to perform the anaerobic mono-digestion of pig manure. The leachate residue of the pig ... ...

Abstract	This work pioneered the efficient coupling of a leach bed reactor (using a filter medium and no anaerobic sludge) and a continuous stirred-tank reactor (LBR-CSTR) to perform the anaerobic mono-digestion of pig manure. The leachate residue of the pig manure (LR-PM) was dried by a biodrying process. The results revealed that the LBR-CSTR (with ceramsite (C) as the filter medium) showed the best performance (the biogas production was 241.68 ml/g volatile solids (VS), which was 1.24 times higher than that of the control CSTR (CK)), the weight loss of pig manure was the highest (the reduction was 95.83%), and the organic degradation was 86.82% (which was 19.49% higher than that of the CK). The seed germination index (GI) was higher than 50%, and the clogging of the leach bed was overcome. The energy and resource utilizations of pig manure were readily achieved.
Keywords	energy ; gas production (biological) ; leachates ; methanogens ; pig manure ; seed germination ; sludge ; weight loss
Language	English
Dates of publication	2019-1010
Size	p. 1094-1101.
Publishing place	Elsevier Ltd
Document type	Article
ISSN	0959-6526
DOI	10.1016/j.jclepro.2019.06.054
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Article: Influence of reflux ratio on the anaerobic digestion of pig manure in leach beds coupled with continuous stirred tank reactors

Yang, Jie / Luo, Zifeng / Wang, Dehan / Zeng, Weishen

Waste management. 2019 Sept., v. 97

2019

Abstract	The effect of reflux ratio on the anaerobic mono-digestion of pig manure (PM) in leach beds coupled with continuous stirred tank reactors (CSTRs) has been studied in this work, and contents of volatile fatty acids (VFAs) and biogas yields were determined for three groups of leach bed reactor (LBR) – CSTR systems. The obtained results indicated that the reflux of biogas slurry increased both the pH of the acid-producing phase and acetic acid yield and repeatedly degraded the refractory organic matter in the biogas slurry. The larger reflux ratio increased the inoculation volume and substantially enhanced the mass transfer process. The maximum values of the biogas and methane yields equal to 259.49 and 167.44 mL/g volatile solids, respectively, were achieved at a reflux ratio of 100%. Moreover, the weight of the PM leachate residue was reduced by 94.14%, and the total nutrient content (N + P2O5 + K2O) was relatively high (1.48%), which was suitable for vegetable seedling substrates. In conclusion, during the treatment of PM in LBR–CSTRs, the solid phase remains on the leach bed, and the leachate is supplied to a biogas tank, which effectively increases its stability of operation.
Keywords	acetic acid ; anaerobic digestion ; biogas ; leachates ; mass transfer ; methane production ; nutrient content ; organic matter ; pH ; pig manure ; seedlings ; slurries ; vegetables ; volatile fatty acids ; waste management
Language	English
Dates of publication	2019-09
Size	p. 115-122.
Publishing place	Elsevier Ltd
Document type	Article
ZDB-ID	2001471-5
ISSN	1879-2456 ; 0956-053X
ISSN (online)	1879-2456
ISSN	0956-053X
DOI	10.1016/j.wasman.2019.08.005
Database	NAL-Catalogue (AGRICOLA)

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