【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%。更多还原

【Abstract】 Wastewater containing tin was treated by precipitation-coagulation process and precipitation-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 Industries( GB 30770-2014). When p H value was 3. 0,Na2 CO3 dosage was 90 mg/L,ferric content was2. 90 mg/L,and the tin concentration was 17. 7 mg/L in the raw wastewater,the tin removal rate by precipitation-coagulation-microfiltration combined process was 99. 97%,where membrane fouling rate was slow and membrane flux recovery rate was 92. 2% after physical cleaning.更多还原