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	Comparison of heavy metal removal efficiencies in four activated sludge processes
	Yang J.; Gao, D.; Chen, T. B.; Lei, M.; Zheng, G. D.; Zhou, X. Y.
	2015
关键词	wastewater heavy metal removal efficiency treatment process activated sludge processes waste-water treatment competitive adsorption treatment-plant arsenate phosphorus phosphate effluent nitrogen system error
英文摘要	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.
出处	Journal of Central South University
卷	22
期	10
页	3788-3794
收录类别	SCI
语种	英语
ISSN号	2095-2899
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/38978]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Yang J.,Gao, D.,Chen, T. B.,et al. Comparison of heavy metal removal efficiencies in four activated sludge processes. 2015.

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