沉淀-混凝-微滤组合工艺处理含锡废水  

Treatment of Wastewater Containing Tin by Precipitation-Coagulation-Microfiltration Combined Process

作　　者：王丹[1] 顾平[1] 王利桃 张光辉[1] 

机构地区：[1]天津大学环境科学与工程学院,天津300350

出　　处：《中国给水排水》2018年第5期96-100,共5页China Water & Wastewater

摘　　要：采用沉淀-混凝法和沉淀-混凝-微滤组合工艺处理含锡废水,分析两种方法对锡的去除效果和膜污染情况。试验结果表明,采用沉淀-混凝法除锡基本可以满足《锡、锑、汞工业污染物排放标准》(GB 30770—2014)的要求;当原水p H值约为3.0、锡浓度为17.7 mg/L、Na2CO3投加量为90 mg/L、三氯化铁投加量为2.90 mg/L(以Fe计)时,沉淀-混凝-微滤组合工艺对锡的去除率高达99.97%,并且该工艺膜污染速率缓慢,经过物理清洗后膜通量恢复率为92.2%。Wastewater containing tin was treated by precipitation - coagulation process and precip- itation -coagulation -microfiltration combined process, the tin removal efficiency and membrane fouling of the two process were studied. The results showed that the removal of tin by precipitation - coagulation process could basically meet Emission Standards of Pollutants for Stannum, Antimony and Mercury Indus- tries （GB 30770 -2014）. When pH value was 3.0, Na2CO3 dosage was 90 mg/L, ferric content was 2.90 mg/L, and the tin concentration was 17.7 mg/L in the raw wastewater, the tin removal rate by pre- cipitation - coagulation - microfiltration combined process was 99.97% , where membrane fouling rate was slow and membrane flux recovery rate was 92.2% after physical cleaning.

关 键 词：含锡废水 沉淀 混凝 微滤 碳酸钠 三氯化铁 

分 类 号：TU993.3[建筑科学—市政工程]