膜科学与技术

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ClassificationCode：X703.1

year,volume(issue):pagination： 2020,40(2):6-13

Abstract：

This study investigated the performance of copper total phosphorus removal from pyrophosphate copper electroplating wastewater by chemical precipitation-ultrafiltration processes. The effects of calcium hydroxide dosage, stirring time and stirring speed on the removal of copper and total phosphorus, as well as the effects of operation pressure and membrane velocity on membrane flux were investigated. The mechanism of membrane fouling was also discussed. The results show that: additive amount of calcium hydroxide 1.25 g·L-1, stirring time is 24 min, mixing speed is 150 r·min-1, operating pressure is 0.15 MPa, the membrane surface velocity of 2.5 m·s-1, the stability of the membrane flux in 700 L·m-2·h-1, the content of copper in water stability in 0.2~0.3 mg·L-1, and total phosphorus content stability in 0.2~0.4 mg·L-1, are lower than the "integrated wastewater discharge standard" (DB12/356-2008) on copper and phosphorus requirements. In the process of electroplating wastewater treatment, the membrane pollution mainly comes from the filter cake layer in the inner wall of tube membrane. After acid pickling, the flux can be basically restored.

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国家科技重大专项课题（2017ZX07107-001-003）；天津市教委科研计划项目（2018KJ161）；天津市科技重大专项与工程计划（17ZXSTSF00040）

AuthorIntro：

第一作者简介：冉子寒(1995—)，男，河北保定人，硕士研究生，研究方向：水处理新工艺与技术，E-mail：749940333@qq.com 通讯作者，E-mail：zyf9182@tcu.edu.cn

Reference：

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