NDLI: Comparison of heavy metal removal efficiencies in four activated sludge processes

Content Provider	SpringerLink
Author	Yang, Jun Gao, Ding Chen, Tong bin Lei, Mei Zheng, Guo di Zhou, Xiao yong
Copyright Year	2015
Abstract	The removal efficiencies of heavy metals (As, Cr, Cu, Ni, Pb and Zn) were investigated in the 17 operating municipal wastewater treatment plants (WWTPs) and compared with those in four main activated sludge processes. Significant differences of heavy metal removal efficiencies were observed among four activated sludge processes. The removal efficiency for As (75.5%) in the oxidation ditch (OD) process is significantly higher than that in the conventional activated sludge (CAS) process (38.6%) or sequencing batch reactor (SBR) process (51.4%). The mean removal efficiencies for Cu and Ni in the OD process are 90.5% and 46.7%, respectively, while low mean removal efficiencies are observed for Cu (69.9%) and Ni (16.5%), respectively, in the SBR process. The removal efficiencies for Cu and Ni in the OD process are significantly higher than those in the anaerobic-anoxic-oxic (A$^{2}$-O) process. These results highlight the differences of removal efficiencies for heavy metals in different processes and should be considered when selecting a wastewater treatment process.
Starting Page	3788
Ending Page	3794
Page Count	7
File Format	PDF
ISSN	20952899
Journal	Journal of Central South University of Technology
Volume Number	22
Issue Number	10
e-ISSN	22275223
Language	English
Publisher	Central South University
Publisher Date	2015-10-18
Publisher Place	Changsha
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	wastewater heavy metal removal efficiency treatment process activated sludge processes Engineering Metallic Materials
Content Type	Text
Resource Type	Article
Subject	Metals and Alloys Engineering

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