Distinct effects of chemical- and bio- flocculants on the sludge acidogenic fermentation for volatile fatty acids production by affecting the acidogenic steps, microbial community structure and metabolic functions.

Fermentation Sewage / chemistry Hydrogen-Ion Concentration Fatty Acids, Volatile / metabolism Microbiota
Chitosan Metabolic function Microbial toxicity Poly‑aluminum chloride Volatile fatty acids

Journal

The Science of the total environment
ISSN: 1879-1026
Titre abrégé: Sci Total Environ
Pays: Netherlands
ID NLM: 0330500

Informations de publication

Date de publication:
20 Dec 2023
Historique:
received: 11 07 2023
revised: 30 08 2023
accepted: 17 09 2023
medline: 15 11 2023
pubmed: 21 9 2023
entrez: 20 9 2023
Statut: ppublish

Résumé

Flocculants play crucial roles in sludge treatment, while the specific impact of chemical and bio-flocculants on sludge anaerobic fermentation was unknown. This study unveiled the contrasting effects of chitosan (CTS) and poly‑aluminum chloride (PAC) on volatile fatty acids (VFAs) generation during sludge fermentation. CTS supplementation resulted in 17.2 % increase in VFAs production, while PAC exposure led to 7.6 % reduction compared to the control. Further investigation revealed that CTS facilitated sludge solubilization and hydrolysis, thus providing sufficient organic substrates for VFAs generation. Additionally, environmental-friendly CTS exposure positively influenced the abundance and activity of functional anaerobes, as well as the expression of genes associated with VFAs biosynthesis. In contrast, PAC exposure resulted in the formation of larger sludge flocs, which hindered WAS solubilization and hydrolysis. Meanwhile, its potential microbial toxicity also impeded the microbial metabolic activity (i.e., genetic expressions), resulting in unsatisfactory VFAs production.

Identifiants

DOI: 10.1016/j.scitotenv.2023.167207 PMID: 37730033
pubmed: 37730033
pii: S0048-9697(23)05834-5
doi: 10.1016/j.scitotenv.2023.167207
pii:
doi:

Substances chimiques

Sewage 0
Fatty Acids, Volatile 0

Types de publication

Journal Article

Langues

eng

Sous-ensembles de citation

IM

Pagination

167207

Informations de copyright

Copyright © 2023. Published by Elsevier B.V.

Déclaration de conflit d'intérêts

Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

Auteurs

Jingyang Luo (J)

Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, China; College of Environment, Hohai University, Nanjing 210098, China.

Xue Xia (X)

Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, China; College of Environment, Hohai University, Nanjing 210098, China.

Yuxiao Li (Y)

Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, China; College of Environment, Hohai University, Nanjing 210098, China.

Shiyu Fang (S)

Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, China; College of Environment, Hohai University, Nanjing 210098, China.

Feng Wang (F)

Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, China; College of Environment, Hohai University, Nanjing 210098, China.

Xiaoshi Cheng (X)

Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, China; College of Environment, Hohai University, Nanjing 210098, China.

Leiyu Feng (L)

State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai 200092, China.

Wenxuan Huang (W)

Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, China; College of Environment, Hohai University, Nanjing 210098, China. Electronic address: hwx864493861@163.com.

Yang Wu (Y)

State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai 200092, China. Electronic address: wuyang1026@tongji.edu.cn.

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Classifications MeSH

questionsmedicales.fr › Métabolisme › Métabolisme glucidique › Fermentation › Distinct effects of chemical- and bio-...
questionsmedicales.fr › Mélanges complexes › Eaux d'égout › Distinct effects of chemical- and bio-...
questionsmedicales.fr › Phénomènes chimiques › Concentration en ions d'hydrogène › Distinct effects of chemical- and bio-...
questionsmedicales.fr › Lipides › Acides gras › Acides gras volatils › Distinct effects of chemical- and bio-...
questionsmedicales.fr › Environnement et santé publique › Environnement › Écosystème › Biodiversité › Biote › Microbiote › Distinct effects of chemical- and bio-...