化学沉淀-微滤处理含铅废水

Chemical precipitation-microfiltration process for treatment of wastewater containing lead

采用化学沉淀-微滤膜工艺处理铅蓄电池生产废水,分别以氢氧化钠、石灰浆为沉淀剂,进行了两个阶段的运行试验,并结合烧杯试验对反应器混合液污泥特性以及膜比通量的影响因素进行了研究.试验结果表明,以石灰乳为沉淀剂时,原水SO42-的浓度波动,会引起混合液污泥浓度的变化;铁盐可以改善MLSS的过滤性能,提高膜通量;水温对膜比通量有较大影响,水温每升高1℃,膜比通量约增加2.42%.

Chemical precipitation - microfiltration process was used to treat the wastewater containing lead from storage battery factories. Sodium hydroxide and lime were adopted as precipitating reagents respectively, two stages operational tests were conducted. The factors that influencing on the characters of mixed liquor suspended solid （MLSS） and on specific flux of the membrane reactor were researched. The results showed that when lime was adopted as precipitating reagent, the wave of the concentration of SO4^2- in influent could induce the change of MLSS concentration; the presence of ferric could improve the filterability of MLSS; and when the temperature of influent increased 1 centigrade degree, the specific flux of membrane increased 2.42 percent.