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J Environ Manage

Title:		Evaluating the effect of diclofenac on hydrogen production by anaerobic fermentation of waste activated sludge
Author(s):		Yang J; Duan A; Wang D; Yang X; Liu X; Yang G; Yang Q;
Address:		"College of Environmental Science and Engineering, Hunan University, Changsha, 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, PR China. College of Environmental Science and Engineering, Hunan University, Changsha, 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, PR China. Electronic address: w.dongbo@yahoo.com. College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo, 315100, PR China"
Journal Title:		J Environ Manage
Year:		2022
Volume:		20220204
Issue:
Page Number:		114641 -
DOI:		10.1016/j.jenvman.2022.114641
ISSN/ISBN:		1095-8630 (Electronic) 0301-4797 (Linking)
Abstract:		"Hydrogen production from waste-activated sludge (WAS) anaerobic fermentation is considered to be an effective method of resource recovery. However, the presence of a large number of complex organic compounds in sludge will affect the biological hydrogen production process. As an extensively applied prevalent anti-inflammatory drug, diclofenac (DCF) is inevitably released into the environment. However, the effect of diclofenac on hydrogen production from WAS anaerobic fermentation has not been fully investigated. This work therefore aims to comprehensively investigate the removal efficiency of DCF in mesophilic anaerobic fermentation of WAS and its effect on hydrogen yield. Experiment results showed that 32.5%-38.3% of DCF was degraded in the fermentation process when DCF concentration was ranged from 6 to 100 mg/kg TSS (total suspended solids). DCF at environmental level inhibited hydrogen production, the maximal hydrogen yield decreased from 24.2 to 15.3 mL/g VSS (volatile suspended solids) with an increase of DCF addition from 6 to 100 mg/kg TSS. This is because the presence of DCF caused inhibitions to acetogenesis and acidogenesis, the processes responsible for hydrogen production, probably due to that the polar groups of DCF (i.e., carboxyl group) could readily bind to active sites of [FeFe]- Hydrogenase. Besides, the microbial analysis revealed that DCF increased the microbial diversity but had few influences on the microbial structure"
Keywords:		"Anaerobiosis *Diclofenac Fatty Acids, Volatile Fermentation Hydrogen Hydrogen-Ion Concentration *Sewage/chemistry Anaerobic fermentation Diclofenac Hydrogen production Waste-activated sludge;"
Notes:		"MedlineYang, Jingnan Duan, Abing Wang, Dongbo Yang, Xianli Liu, Xuran Yang, Guojing Yang, Qi eng England 2022/02/09 J Environ Manage. 2022 Apr 15; 308:114641. doi: 10.1016/j.jenvman.2022.114641. Epub 2022 Feb 4"