Abstract:

The effect of recovery rates, the volume ratio of nanofiltration concentrated water and raw water volume and pH value of nanofiltration(NF) circulation system on wastewater treatment was studied by tacking calcium ion and sulfate ion as control index in industrial wastewater of a phosphorous chemical enterprise. Then based on it the treatment process of an actual industrial wastewater by the continuous NF treatment system was studied. The nanofiltration system had a recovery rate of 60%, the nanofiltration concentrated water and raw water volume ratio was 1:1.5, and the pH was 12, which was the optimal operating condition of the system. After the system was stably operated, the concentration of Ca²⁺, Mg²⁺, SO₄^2-, etc. did not appear to be continuously enriched on the concentrated water side or the fresh water side, and could be continuously reused.

Key words: chemical wastewater, zero discharge, nanofiltration(NF)

摘要：

以某磷化工企业实际工业废水中的Ca²⁺、SO₄^2-等为控制指标，研究纳滤循环系统回收率、纳滤浓水和原水体积比、pH对废水处理效果的影响，在此基础上对纳滤循环系统连续处理该废水展开了研究。结果表明，系统最佳运行条件：纳滤系统回收率为60%，纳滤浓水、原水体积比为1:1.5，pH为12。该系统稳定运行后，Ca²⁺、Mg²⁺、SO₄^2-等的浓度无论在浓水侧还是淡水侧均没有出现不断富集的现象，可不断回用。

关键词: 化工废水, 零排放, 纳滤

CLC Number: 

• X703.1