Electro-fermentation of iron-enhanced primary sedimentation sludge in a two-chamber bioreactor for product separation and resource recovery

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 中国科学院环境生物技术重点实验室

	Electro-fermentation of iron-enhanced primary sedimentation sludge in a two-chamber bioreactor for product separation and resource recovery
	Lin, Lin ; Tam, Long-hang ; Xia, Xue ; Li, Xiao-yan
刊名	WATER RESEARCH
	2019-06-15
卷号	157 页码:145-154
关键词	Electro-fermentation (EF) Phosphorus dissolution Cation migration Hydrolysis enzymes Microbial community Resource recovery
ISSN号	0043-1354
英文摘要	Iron (Fe)-based chemically enhanced primary sedimentation (CEPS) is an effective process used to remove organic and phosphorus (P) pollutants from wastewater into sludge. In this study, electrofermentation (EF) technology was developed to treat the organic- and P-rich Fe-sludge for the purposes of sludge reduction and resource recovery. Using a two-chamber bioreactor with a cation exchange membrane and an exterior voltage (0.5-1.0 V) for sludge treatment, the EF system enabled product accumulation and separation during the fermentation process. Compared with the conventional fermentation in a single-chamber reactor, the EF treatment of Fe-sludge significantly improved the efficiency of P dissolution from the sludge from 8% to 56% after 4 d. Meanwhile, about 70% of released ammonium ions and 50% of Fe in the sludge were driven by the current from the sludge suspension into the cathode chamber for potential recovery. With a similar yield of volatile fatty acids (VFAs) but less ammonium remaining, the CODvFA/NNH4 of the sludge supernatant from the EF reactor could reach 67.7, much higher than that from the single-chamber fermenter at 13.0. The protease activity was effectively promoted by the EF treatment, suggesting that both electrochemical and biological hydrolysis effects contributed to the increased P release from the sludge. Microbial community analysis showed that the electrical stimulation increased the relative abundance of Firmicutes and facilitated the growth of Acidobacteria. Overall, electro-fermentation was developed as an effective biotechnology for processing Fe-based CEPS sludge with the benefits of recovering organics, phosphorus, ammonium and iron resources. (C) 2019 Elsevier Ltd. All rights reserved.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/43360]
专题	生态环境研究中心_中国科学院环境生物技术重点实验室
作者单位	1.Univ Hong Kong, Dept Civil Engn, Environm Engn Res Ctr, Pokfulam, Hong Kong, Peoples R China 2.Tsinghua Univ, Tsinghua Berkeley Shenzhen Inst, Shenzhen, Peoples R China 3.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Environm Biotechnol, Beijing 100085, Peoples R China 4.Tsinghua Univ, Grad Sch Shenzhen, Shenzhen Engn Res Lab Sludge & Food Waste Treatme, Shenzhen, Peoples R China
推荐引用方式 GB/T 7714	Lin, Lin,Tam, Long-hang,Xia, Xue,et al. Electro-fermentation of iron-enhanced primary sedimentation sludge in a two-chamber bioreactor for product separation and resource recovery[J]. WATER RESEARCH,2019,157:145-154.
APA	Lin, Lin,Tam, Long-hang,Xia, Xue,&Li, Xiao-yan.(2019).Electro-fermentation of iron-enhanced primary sedimentation sludge in a two-chamber bioreactor for product separation and resource recovery.WATER RESEARCH,157,145-154.
MLA	Lin, Lin,et al."Electro-fermentation of iron-enhanced primary sedimentation sludge in a two-chamber bioreactor for product separation and resource recovery".WATER RESEARCH 157(2019):145-154.