摘要
采用絮凝与超滤耦合技术处理生活污水,考察了压差、膜面流速和温度对不同体系稳定通量的影响;并在此基础上,探讨耦合条件对COD的去除效果,分析膜的污染机理,提出有效的膜清洗方法。研究表明:在膜分离过程中引入絮凝处理,能显著提高处理效果;不可逆污染阻力Rf在总阻力中占主要地位;FeCl3+壳聚糖+超滤这一耦合工艺在3m/s流速和0.2MPa下操作可得到较好的稳定通量和COD去除率。
Municipal wastewater was treated by coupling technology of flocculation.ultrafiltration. The effects of operating pressure, cross-flow velocity and temperature on membrane steady fluxes were investigated. And under the different coupling conditions was enquired into COD removal rate. The mechanism of membrane fouling and the method of membrane cleaning were investigated. The results showed that the membrane separation technique coupled with flocculation could enhance remarkedly the treating efficiency and that the irreversible fouling resistance Rf prevailed in the total resistance. When cross-flow velocity was 3m/s and operating pressure was 0.2MPa, membrane steady flux and COD removal rate were increased rapidly under the conditions of FeCl3 and chitosan coupled with ultrafiltration （UF）.
出处
《水处理技术》
CAS
CSCD
北大核心
2006年第5期48-51,共4页
Technology of Water Treatment
关键词
生活污水
超滤
絮凝
膜污染
municipal wastewater
ultrafiltration
flocculation
membrane fouling
