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Recovery Project of Combined Membrane Process in Electrolytic Manganese Wastewater Treatment

Authors： ZHANG Xiangyu, Song Baohua, Zou Zhengyu

Units： CECEP Liuhe Talroad Environmental Technology Co. Ltd., Beijing 100012, China

KeyWords： wastewater containing Mn2+; retention rate; membrane flux; concentration multiple

ClassificationCode：X781.1

year,volume(issue):pagination： 2015,35(4):59-64

Abstract：

A project with 500m3·d-1 for treating electrolytic manganese wastewater was studied. Combined membrane processes, including microfiltration, two steps of nanofiltration and reverse osmosis were used. The flux, retention rate rate and concentration ratio were investigated. During the period from 2010.5 to 2012.5, the membrane flux declined over time. The first stage nanofiltration membrane flux fell the most serious, about 16%, but after chemical cleaning, it can be restored to the 90% of the initial data. The interception rates of membrane groups were stable during the time. Mn2+ retention rate of nanofiltration system was more than 90%, while retention rate for SO42- was about 80%, but the effect for ammonium ion was poor. Ammonium ion rejection rate of the reverse osmosis system meant up to 91.6%. The concentration multiples of the manganese ion of the nanofiltration system can be remained at about 8 in small pressure range. The final drainage meet the first class discharge standard of "integrated wastewater discharge standard" (GB8978-1996). Consequently, the system can meet the needs of electrolytic manganese wastewater resources recycling and discharge standards.

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AuthorIntro：

张翔宇（1984.3-），籍贯：内蒙古，男，硕士研究生，主要研究方向：重金属治理及资源化回收利用。

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