复合膜生物反应器脱除地下水中硝酸盐的性能  

Characteristics of Groundwater Denitrification Using a Composite Membrane Bioreactor

作　　者：张立辉[1] 曹国民[1] 黄海苏[1] 盛梅[1] 刘勇弟[1] 

机构地区：[1]华东理工大学环境工程研究所,上海200237

出　　处：《华东理工大学学报（自然科学版）》2011年第5期594-600,共7页Journal of East China University of Science and Technology

基　　金：水体污染控制与治理科技重大专项子课题(2008ZX07425-001-04)

摘　　要：将膜分离技术与细胞固定化技术结合起来,研究了一种可用于去除地下水中硝酸盐的复合膜生物反应器(CMBR),并分别通过正交实验及单因素实验考察了复合膜生物反应器的最佳脱氮条件及影响因素。结果表明CMBR平板状固定化细胞适宜的制备条件:厚度4 mm,w=15%聚乙烯醇溶液中细菌包埋量20 g/L,地下水反硝化脱氮适宜的碳氮比、温度、pH分别为6∶1、30°C、7.0～8.0;适宜的反硝化碳源为乙醇,反硝化速率与硝酸盐初始质量浓度成正比。在最佳脱氮条件下,出水中硝酸盐氮、亚硝酸盐氮和耗氧量等水质指标均符合生活饮用水卫生标准。A composite membrane bioreactor（CMBR） integrating the membrane separation technology with the immobilized cells technique was investigated for groundwater denitrification.The optimal denitrification conditions were obtained by orthogonal and single factor experiments,respectively.The results showed that the optimum conditions of immobilized cells preparation were 4 mm thickness,and embedding denitrifying bacteria in PVA solution（w=15%） was 20 g/L.The optimum carbon to nitrogen ratio,temperature and pH were 6∶1,30 °C and 7.0-8.0,respectively.And ethanol was a proper carbon source.The denitrification rate of CMBR was proportional to the initial concentration of NO3——N.The water quality indexes of nitrate nitrogen,nitrite nitrogen and chemical oxygen demand（CODMn） in treatment groundwater under the optimum conditions can meet the requirements of current national standards for drinking water.

关 键 词：地下水 硝酸盐 反硝化 复合膜生物反应器 固定化细胞 

分 类 号：X523[环境科学与工程—环境工程]