混凝-MBR组合技术净化洗车废水试验研究

摘要

研究混凝-MBR组合技术净化洗车废水,首先对该技术净化CODcr、UV254、NH3 -N和浊度的效果进行了考察,实验结果表明,当废水温度大于22℃时、溶解氧浓度大于4.8 mg/L时、pH值在6到8之间的条件下,该组合技术对CODcr、NH3 -N和浊度的净化效果较好,平均净化率分别达到90.2%、96.4%和98%以上,高于传统MBR技术和常规技术,出水CODcr约为20 mg/L,NH3 -N基本在0.7 mg/L以下,浊度也小于0.5NTU,水质优于中国建设部生活杂用水水质标准( CJ25.1-89).%The combined process of coagulation and membrane bioreactor ( MBR ) was applied for purifying car -washing wastewater.The purifying efficiencies of CODcr,NH3 -N and turbidity in the combined process were investigated.The result showed that the combined process may achieve better removal efficiencies of CODcr, NH3 -N, when water temperature is above 22℃, DO is above 4.8 mg/L and pH is between 6 and 8.The removal efficiencies of CODcr, NH3 -N and turbidity in the com-bined process were more than 90.2%,96.4% and 98% respectively, and was better than that of unique MBR process and con-ventional process.The effluent CODcr was less than 20 mg/L and NH3 -N was less than 1 mg/L, turbidity was less than 0.5NTU.It was better than that of water for domestic reuse stated by the Ministry of Construction(CJ25.1-89).