摘要
选用5种滤布作为动态膜生物反应器(DMBR)的膜基材在相同操作条件下进行对比实验,考察反应器运行周期、反冲洗前后过滤压力、膜通量的恢复情况,分析DMBR进出水水质。结果表明,应用DMBR处理模拟生活污水,其中孔径为24μm的涤纶短纤滤布组成的DMBR对COD、氨氮和总氮的去除率分别为90%、80%和48%以上;运行周期为34.5h;反冲洗前后过滤压差大,膜通量恢复率高,最适合作为DMBR的膜基材。这与滤布孔径有关,孔径越大,对污染物的去除效果越差,反冲洗前后过滤压差和初始膜通量越大,运行周期越长。材质对运行周期有影响,长纤滤布的污染速度比短纤快。当滤布孔径大于37μm时,活性污泥在滤布表面形成标准堵塞,使得恢复膜通量降低。
The five filter clothes were utilized as the membrane materials to develop a dynamic membrane bioreactor（DMBR） under the same conditions.The operation-time,filter pressure,recovery of the membrane flux were investigated,the water quality of the DMBR was monitored.The results showed that an average COD,NH＋4-N and TN removal of the DMBR with the 24 μm polyester short-staple cloth reached over 90%,80% and 48%,respectively.The operation-time was 34.5 h.The filter pressure was big and the recovery rate of membrane flux was high.The polyester short-staple cloth was the best material of the DMBR.When the pore size of cloth increased,the removal efficiency reduced,the filter pressure,the initial membrane flux and operation-time increased.The material and structure of the cloth affected the operation-time,respectively.The pollution rate of the long-staple was faster than short-staple.When the size of the cloth was bigger than 37 μm,the filtration was the standard blocking,the recovery of the membrane flux was reduced.
出处
《环境工程学报》
CAS
CSCD
北大核心
2011年第2期311-314,共4页
Chinese Journal of Environmental Engineering
基金
福建省自然科学基金(2009J05124)
华侨大学高层次人才科研启动基金(08BS204)
关键词
动态膜生物反应器
滤布
性能比较
dynamic membrane bioreactor
filter cloth
performance comparison
