文章基本信息

标题：STUDY ON THE INFLUENCE OF COPPER AND NICKEL IONS ON THE HYDROLYSIS-MBR PROCESS
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作者：Guangzhi Wang ; Likun Huang ; Zhi Xia 等
期刊名称：Fresenius Environmental Bulletin
印刷版ISSN：1018-4619
出版年度：2017
卷号：26
期号：12A
页码：8069-8077
语种：English
出版社：PSP Publishing
摘要：In this study, the hydrolysis- membrane bioreactor process (the HMBR process) was employed to treat electroplating wastewater, and the influence of the heavy metal impact represented by Cu2+ and Ni2+ with different concentrations on treatment efficiency of the HMBR process and the variation of DOM and microbial activity in water were mainly studied. The results showed: under the impact of Cu2+ and Ni2+ with concentrations of 5 to 20 mg/L, the removal efficiencies of COD and NH4+-N in the HMBR process were above 75% and 45%, respectively; nitrifying bacteria had poor impact resistance to heavy metals; the HMBR process could endure 20 mg/L Cu2+ and Ni2+, but the maximum tolerance of the MBR process was only 10 mg/L; the hydrolysis reactor could transform most of HPI in the sewage into HPO-A, thus improving the biodegradability of refractory organics, and the content of aromatic compounds decreased significantly; along with the increase of the concentration of Cu2+ and Ni2+, the SOUR value in the MBR was declining, but the decrease of the SOUR value in the HMBR process was much less than the one in the MBR process, and the inhibition rate of SOUR in the HMBR process was nearly 5% lower than the one in the MBR process; because the hydrolysis could reduce the toxicity of heavy metal, the HMBR process had better microbial activity, less EPS content, and lower effluent concentration than the MBR process; the HMBR process could prevent the formation of colloid substances and DOM on the membrane surface efficiently, and had less cake layer and slower membrane fouling rate.
关键词：Electroplating Wastewater;Hydrolysis;MBR;Heavy Metal