卷式超滤膜在蓝藻收集中的应用  

Application of spiral ultrafiltration(UF) membranes in cyanobacteria-collection

作　　者：许鹏成[1,2] 柴天[2] 傅海燕[2] 黄国和[2] 严滨[2] 刘智峰[3] 张明真[1,2] 赵坤[1,2] 侯明[1,2] 

机构地区：[1]华北电力大学能源与环境研究院,区域能源系统优化教育部重点实验室,北京102206 [2]厦门理工学院环境工程系,厦门361024 [3]湖南大学环境科学与工程学院,长沙410082

出　　处：《环境工程学报》2011年第8期1739-1744,共6页Chinese Journal of Environmental Engineering

基　　金：国家水体污染控制与治理科技重大专项(2009ZX07104-004);厦门市科技计划项目(3502Z20093040)

摘　　要：利用微孔滤布-卷式超滤膜组合工艺,构建蓝藻收集中试系统,用于处理高藻期富营养化水体。考察了高藻期该工艺的蓝藻收集效率、膜通量变化及膜污染状况。结果表明,该组合工艺在进水泵频率40 Hz,进水压力0.2 MPa的条件下,定期排蓝藻浓缩液实验和蓝藻连续浓缩实验的蓝藻截留率均能达到95%以上;6 d后定期排蓝藻浓缩液实验最低通量稳定在120 L/h,连续浓缩实验最低通量稳定在60 L/h;蓝藻截留率随进水蓝藻浓度的升高而增大,膜通量随着进水浓度的升高而降低;实验期内蓝藻未对该超滤膜造成不可逆污染,利用含酶清洗剂清洗,通量恢复到初始通量的94%。A pilot plant with combination processes of millipore filtercloth and spiral UF membrance was used to collect cyanobacteria from the eutrophic water.The efficiency of cyanobacteria-collection,membrane flux and membrance fouling were mainly studied.The results showed that the cyanobacteria removal rates for periodical cyanobacteria thickening experiment and continual cyanobacteria thickening experiment were both higher than 95% with pump frequency up to 40 Hz and water pressure up to 0.2 MPa;and 6 days later,the lowest effusion flux of the former experiment kept stable at 120 L/h,then the latter one at 60 L/h.The results also showed that the cyanobacteria removal rate became larger with the increase of the feed cyanobacteria concentration,but the membrane flux got smaller with its increase.Membrane fouling caused by cyanobacteria could be eliminated in the experiment.And the detergent containing enzyme had good ability to control membrane fouling.The flux of the UF membrane washed by detergent containing enzyme could still reach as high as 94% of that of the original UF membrane.

关 键 词：富营养化 水体净化 卷式超滤膜 除藻 清洗 

分 类 号：X524[环境科学与工程—环境工程]