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Article ; Online: Enhancement of anaerobic digestion from food waste via inert substances based on metagenomic analysis: Oxidative phosphorylation and metabolism.

Jiang, Xiupeng / Li, Zongsheng / Lin, Kunsen / Zhao, Youcai / Su, Lianghu / Wu, Tong / Zhou, Tao

2023 Volume 246, Page(s) 118033

Abstract: The application of anaerobic digestion (AD) in the treatment of food waste (FW) has become widespread. However, the presence of inert substances, such as bones, ceramics, and shells, within FW introduces a degree of uncertainty into the AD process. To ... ...

Abstract	The application of anaerobic digestion (AD) in the treatment of food waste (FW) has become widespread. However, the presence of inert substances, such as bones, ceramics, and shells, within FW introduces a degree of uncertainty into the AD process. To clarify this intricate issue, this study conducted an in-depth investigation into the influence of inert substances on AD. The results revealed that when inert substances were present at a concentration of 0.08 g/g VSS, methane productivity in the AD process was significantly augmented by 86%. Subsequent investigations suggested that this positive effect was primarily evident in various biochemical processes, including solubilization, hydrolysis acidification, methanogenesis, and the accumulation of extracellular polymeric substances. Metagenomic analysis showed that inert substances enhance the relative abundance of hydrolytic bacteria and have a pronounced impact on the relative abundance of hydrogenotrophic methanogens (Methanosarcina) and acetotrophic methanogens (Methanobacterium). Additionally, inert substances significantly increased the relative abundance of functional genes in oxidative phosphorylation, a pivotal pathway for ATP synthesis. Furthermore, inert substances had a substantial effect on the functional genes related to the metabolic pathways associated with methanogenesis (both hydrogenotrophic and acetotrophic). This comprehensive study shed light on the substantial impact of inert substances on the AD of food waste, contributing to an enhanced understanding of the underlying mechanisms of anaerobic fermentation.
MeSH term(s)	Anaerobiosis ; Food Loss and Waste ; Bioreactors ; Oxidative Phosphorylation ; Food ; Refuse Disposal ; Methane ; Sewage/microbiology
Chemical Substances	Food Loss and Waste ; Methane (OP0UW79H66) ; Sewage
Language	English
Publishing date	2023-12-28
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	205699-9
ISSN	1096-0953 ; 0013-9351
ISSN (online)	1096-0953
ISSN	0013-9351
DOI	10.1016/j.envres.2023.118033
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Zs.A 726: Show issues

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Article ; Online: Dioctyl phthalate enhances volatile fatty acids production from sludge anaerobic fermentation: Insights of electron transport and metabolic functions

Yuan, Feiyi / Sun, Yi / Jiang, Xiupeng / Liu, Tao / Kang, Bo / Freguia, Stefano / Feng, Leiyu / Chen, Yinguang

Science of the Total Environment. 2023 Feb., v. 859 p.160102-

2023

Abstract: As one of the most widely used phthalate plasticizers, dioctyl phthalate (DOP) has been detected in wastewater and accumulates in sludge through wastewater treatment, which may adversely affect further sludge treatment. However, the role of DOP on sludge ...

Abstract	As one of the most widely used phthalate plasticizers, dioctyl phthalate (DOP) has been detected in wastewater and accumulates in sludge through wastewater treatment, which may adversely affect further sludge treatment. However, the role of DOP on sludge anaerobic fermentation and its mechanism are not yet clear. Therefore, this study focused on the effect of DOP on the volatile fatty acids (VFAs) generation via the anaerobic fermentation of sludge. The results demonstrated that the presence of DOP had a considerable contribution to the generation of VFAs, and the maximum production of VFAs reached 4769 mg COD/L at 500 mg/kg DOP, which was 1.57 folds that of the control. Mechanistic investigation showed that DOP mainly enhanced the hydrolysis, acidification and related enzymes activities of sludge. VFAs-producing microorganisms (e.g., Clostridium and Conexibacter) were also enriched under DOP exposure. Importantly, the presence of DOP increased the electron transfer activity by 26 %, consequently facilitating the organics conversion and fermentation process. Notably, the functional gene expressions involved in substrate metabolism and VFAs biosynthesis were enhanced with DOP, resulting in increased VFAs production from sludge. The results obtained in this study offered a new strategy for the control of pollutants and the recycling of valuable products from sludge.
Keywords	Clostridium ; acidification ; biosynthesis ; electron transfer ; environment ; fermentation ; genes ; hydrolysis ; phthalates ; sludge ; wastewater ; wastewater treatment ; Activated sludge ; Dioctyl phthalate ; Volatile fatty acids ; Genetic expression
Language	English
Dates of publication	2023-02
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.2022.160102
Database	NAL-Catalogue (AGRICOLA)

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Z 74/341: Show issues

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Article: Petroleum hydrocarbon-contaminated soil bioremediation assisted by isolated bacterial consortium and sophorolipid

Feng, Leiyu / Jiang, Xiupeng / Huang, Yanning / Wen, Dongdong / Fu, Tianyu / Fu, Rongbing

Environmental pollution. 2021 Mar. 15, v. 273

2021

Abstract: Pollution in soil by petroleum hydrocarbon has become a global environmental problem. The bioremediation of petroleum hydrocarbon-contaminated soil was enhanced with the combination of an isolated indigenous bacterial consortium and biosurfactant. The ... ...

Abstract	Pollution in soil by petroleum hydrocarbon has become a global environmental problem. The bioremediation of petroleum hydrocarbon-contaminated soil was enhanced with the combination of an isolated indigenous bacterial consortium and biosurfactant. The biodegradation efficiency of total petroleum hydrocarbon (TPH) was increased from 12.2% in the contaminated soil to 44.5% and 57.7% in isolated consortium and isolated consortium & 1.5 g sophorolipid (SL)/kg dry soil, respectively. The half-life of TPH degradation process was decreased from 32.5 d in the isolated consortium reactor to 20.4 d in the isolated consortium & 1.5 g SL/kg dry soil. The addition of biosurfactant into contaminated soils improved the TPH desorption from solid matrix to the aqueous solution and the subsequent solubilization, which ultimately improved the bioavailability of TPH in contaminated soils. Biosurfactant also served as carbon sources which contributed to the stimulation of cell growth and microbial activity and accelerated the biodegradation process via co-metabolism. The enzyme activities and quantities of functional genes were demonstrated to be incremented in SL reactors. The biosurfactant improved the TPH bioavailability, stimulated the microbial activities and participated in the co-metabolism. The combination of bioaugmentation and SL benefitted the bioremediation of petroleum hydrocarbon-contaminated soil.
Keywords	aqueous solutions ; bioaugmentation ; bioavailability ; biodegradation ; biosurfactants ; carbon ; cell growth ; desorption ; enzymes ; half life ; microbial activity ; petroleum ; polluted soils ; soil pollution ; solubilization
Language	English
Dates of publication	2021-0315
Publishing place	Elsevier Ltd
Document type	Article
Note	NAL-AP-2-clean
ZDB-ID	280652-6
ISSN	1873-6424 ; 0013-9327 ; 0269-7491
ISSN (online)	1873-6424
ISSN	0013-9327 ; 0269-7491
DOI	10.1016/j.envpol.2021.116476
Database	NAL-Catalogue (AGRICOLA)

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Z 4136: Show issues

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Article ; Online: Petroleum hydrocarbon-contaminated soil bioremediation assisted by isolated bacterial consortium and sophorolipid.

Feng, Leiyu / Jiang, Xiupeng / Huang, Yanning / Wen, Dongdong / Fu, Tianyu / Fu, Rongbing

Environmental pollution (Barking, Essex : 1987)

2021 Volume 273, Page(s) 116476

Abstract	Pollution in soil by petroleum hydrocarbon has become a global environmental problem. The bioremediation of petroleum hydrocarbon-contaminated soil was enhanced with the combination of an isolated indigenous bacterial consortium and biosurfactant. The biodegradation efficiency of total petroleum hydrocarbon (TPH) was increased from 12.2% in the contaminated soil to 44.5% and 57.7% in isolated consortium and isolated consortium & 1.5 g sophorolipid (SL)/kg dry soil, respectively. The half-life of TPH degradation process was decreased from 32.5 d in the isolated consortium reactor to 20.4 d in the isolated consortium & 1.5 g SL/kg dry soil. The addition of biosurfactant into contaminated soils improved the TPH desorption from solid matrix to the aqueous solution and the subsequent solubilization, which ultimately improved the bioavailability of TPH in contaminated soils. Biosurfactant also served as carbon sources which contributed to the stimulation of cell growth and microbial activity and accelerated the biodegradation process via co-metabolism. The enzyme activities and quantities of functional genes were demonstrated to be incremented in SL reactors. The biosurfactant improved the TPH bioavailability, stimulated the microbial activities and participated in the co-metabolism. The combination of bioaugmentation and SL benefitted the bioremediation of petroleum hydrocarbon-contaminated soil.
Language	English
Publishing date	2021-01-11
Publishing country	England
Document type	Journal Article
ZDB-ID	280652-6
ISSN	1873-6424 ; 0013-9327 ; 0269-7491
ISSN (online)	1873-6424
ISSN	0013-9327 ; 0269-7491
DOI	10.1016/j.envpol.2021.116476
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Zs.A 2599: Show issues

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Article ; Online: Dioctyl phthalate enhances volatile fatty acids production from sludge anaerobic fermentation: Insights of electron transport and metabolic functions.

Yuan, Feiyi / Sun, Yi / Jiang, Xiupeng / Liu, Tao / Kang, Bo / Freguia, Stefano / Feng, Leiyu / Chen, Yinguang

The Science of the total environment

2022 Volume 859, Issue Pt 1, Page(s) 160102

Abstract	As one of the most widely used phthalate plasticizers, dioctyl phthalate (DOP) has been detected in wastewater and accumulates in sludge through wastewater treatment, which may adversely affect further sludge treatment. However, the role of DOP on sludge anaerobic fermentation and its mechanism are not yet clear. Therefore, this study focused on the effect of DOP on the volatile fatty acids (VFAs) generation via the anaerobic fermentation of sludge. The results demonstrated that the presence of DOP had a considerable contribution to the generation of VFAs, and the maximum production of VFAs reached 4769 mg COD/L at 500 mg/kg DOP, which was 1.57 folds that of the control. Mechanistic investigation showed that DOP mainly enhanced the hydrolysis, acidification and related enzymes activities of sludge. VFAs-producing microorganisms (e.g., Clostridium and Conexibacter) were also enriched under DOP exposure. Importantly, the presence of DOP increased the electron transfer activity by 26 %, consequently facilitating the organics conversion and fermentation process. Notably, the functional gene expressions involved in substrate metabolism and VFAs biosynthesis were enhanced with DOP, resulting in increased VFAs production from sludge. The results obtained in this study offered a new strategy for the control of pollutants and the recycling of valuable products from sludge.
Language	English
Publishing date	2022-11-10
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.2022.160102
Database	MEDical Literature Analysis and Retrieval System OnLINE

In stock of ZB MED Cologne/Königswinter

Zs.A 949: Show issues

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Article: Volatile fatty acids production from waste activated sludge during anaerobic fermentation: The effect of superfine sand

Jiang, Xiupeng / Qin, Zhiyi / Feng, Leiyu / Chen, Yinguang / Chen, Jianguang / Zhang, Xianzhong / Zhang, Zhenguang / Guo, Yingqing / Sun, Jing

Bioresource technology. 2021 Jan., v. 319

2021

Abstract: Superfine sand in waste activated sludge (WAS) increased the uncertainty of anaerobic fermentation. Experiments showed that VFAs production from WAS was positively affected by superfine sand, with an increase from 2513 mg COD/L in the control (without ... ...

Abstract	Superfine sand in waste activated sludge (WAS) increased the uncertainty of anaerobic fermentation. Experiments showed that VFAs production from WAS was positively affected by superfine sand, with an increase from 2513 mg COD/L in the control (without superfine sand) to 3002 mg COD/L with superfine sand. A mechanism study demonstrated that the main factor responsible for the improved VFAs accumulation in response to superfine sand was acetic acid, which increased by nearly 30%. Further investigation exhibited that the process of solubilization and acidification were facilitated by superfine sand and the abundance of anaerobic functional microorganisms was greatly increased. Moreover, the activities of acetate kinase (AK) as well as the quantity of AK encoding gene were greatly promoted by superfine sand. The heat release during WAS anaerobic fermentation with superfine sand was higher than that without superfine sand (25.8 × 10⁻³ versus 24.7 × 10⁻³ W·min at about 70 min).
Keywords	acetate kinase ; acetic acid ; acidification ; activated sludge ; fermentation ; genes ; heat ; sand ; solubilization ; uncertainty
Language	English
Dates of publication	2021-01
Publishing place	Elsevier Ltd
Document type	Article
Note	NAL-AP-2-clean
ZDB-ID	1065195-0
ISSN	1873-2976 ; 0960-8524
ISSN (online)	1873-2976
ISSN	0960-8524
DOI	10.1016/j.biortech.2020.124249
Database	NAL-Catalogue (AGRICOLA)

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Z 3258: Show issues

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Article ; Online: Bisphenol A alters volatile fatty acids accumulation during sludge anaerobic fermentation by affecting amino acid metabolism, material transport and carbohydrate-active enzymes.

Jiang, Xiupeng / Yan, Yuanyuan / Feng, Leiyu / Wang, Feng / Guo, Yingqing / Zhang, Xianzhong / Zhang, Zhenguang

Bioresource technology

2020 Volume 323, Page(s) 124588

Abstract: Bisphenol A (BPA), a typical persistent organic pollutant in waste activated sludge, was chosen to explore its influence on the accumulation of volatile fatty acids (VFAs), which is an important raw material, during anaerobic fermentation. BPA in the ... ...

Abstract	Bisphenol A (BPA), a typical persistent organic pollutant in waste activated sludge, was chosen to explore its influence on the accumulation of volatile fatty acids (VFAs), which is an important raw material, during anaerobic fermentation. BPA in the range of 0-200 mg/kg dry sludge was beneficial to VFAs production, from 1564 mg chemical oxygen demand (COD)/L in the control to 2095 mg COD/L with 50 mg/kg BPA; the acetic acid yield was 563 and 1010 mg COD/L with 0 and 50 mg/kg BPA, respectively. The abundance of microorganisms that can consume VFAs was reduced and those responsible for producing VFAs was increased by BPA. Homologous genes of related enzymes in the pathways for amino acid metabolism, fatty acid biosynthesis, ABC transporters and quorum sensing were enhanced in the presence of BPA. The abundance of carbohydrate-active enzymes increased with BPA when compared with the control, benefitting VFAs production.
MeSH term(s)	Amino Acids ; Anaerobiosis ; Benzhydryl Compounds ; Carbohydrates ; Fatty Acids, Volatile ; Fermentation ; Hydrogen-Ion Concentration ; Phenols ; Sewage
Chemical Substances	Amino Acids ; Benzhydryl Compounds ; Carbohydrates ; Fatty Acids, Volatile ; Phenols ; Sewage ; bisphenol A (MLT3645I99)
Language	English
Publishing date	2020-12-23
Publishing country	England
Document type	Journal Article
ZDB-ID	1065195-0
ISSN	1873-2976 ; 0960-8524
ISSN (online)	1873-2976
ISSN	0960-8524
DOI	10.1016/j.biortech.2020.124588
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Z 3258: Show issues

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Article ; Online: Volatile fatty acids production from waste activated sludge during anaerobic fermentation: The effect of superfine sand.

Jiang, Xiupeng / Qin, Zhiyi / Feng, Leiyu / Chen, Yinguang / Chen, Jianguang / Zhang, Xianzhong / Zhang, Zhenguang / Guo, Yingqing / Sun, Jing

Bioresource technology

2020 Volume 319, Page(s) 124249

Abstract	Superfine sand in waste activated sludge (WAS) increased the uncertainty of anaerobic fermentation. Experiments showed that VFAs production from WAS was positively affected by superfine sand, with an increase from 2513 mg COD/L in the control (without superfine sand) to 3002 mg COD/L with superfine sand. A mechanism study demonstrated that the main factor responsible for the improved VFAs accumulation in response to superfine sand was acetic acid, which increased by nearly 30%. Further investigation exhibited that the process of solubilization and acidification were facilitated by superfine sand and the abundance of anaerobic functional microorganisms was greatly increased. Moreover, the activities of acetate kinase (AK) as well as the quantity of AK encoding gene were greatly promoted by superfine sand. The heat release during WAS anaerobic fermentation with superfine sand was higher than that without superfine sand (25.8 × 10
MeSH term(s)	Anaerobiosis ; Fatty Acids, Volatile ; Fermentation ; Hydrogen-Ion Concentration ; Sand ; Sewage
Chemical Substances	Fatty Acids, Volatile ; Sand ; Sewage
Language	English
Publishing date	2020-10-13
Publishing country	England
Document type	Journal Article
ZDB-ID	1065195-0
ISSN	1873-2976 ; 0960-8524
ISSN (online)	1873-2976
ISSN	0960-8524
DOI	10.1016/j.biortech.2020.124249
Database	MEDical Literature Analysis and Retrieval System OnLINE

In stock of ZB MED Bonn / Germany

Z 3258: Show issues

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Article ; Online: Nitrogen-doped porous carbon derived from digested sludge for electrochemical reduction of carbon dioxide to formate.

Qin, Zhiyi / Jiang, Xiupeng / Cao, Yue / Dong, Shanshan / Wang, Feng / Feng, Leiyu / Chen, Yinguang / Guo, Yingqing

The Science of the total environment

2020 Volume 759, Page(s) 143575

Abstract: Carbon-based materials have been applied as cost-effective electrocatalysts to reduce carbon dioxide ( ... ...

Abstract	Carbon-based materials have been applied as cost-effective electrocatalysts to reduce carbon dioxide (CO
Language	English
Publishing date	2020-11-11
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.2020.143575
Database	MEDical Literature Analysis and Retrieval System OnLINE

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