膜生物反应器中胞外聚合物合成的影响因素  

Study on the Influencing Factors of EPS Synthesis in MBR

作　　者：周伟伟[1] 傅金祥[1] 由昆[1] 李敬宝[1] 琚冉[1] 王业翔 

机构地区：[1]沈阳建筑大学市政与环境工程学院,辽宁沈阳110168 [2]山东十方圆通环保有限公司,山东济南250101

出　　处：《沈阳建筑大学学报（自然科学版）》2007年第3期493-495,共3页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家中小企业技术创新基金项目(06c2621200105);沈阳建筑大学省级重点实验室开放基金(HJ-200604)

摘　　要：目的研究膜生物反应器中胞外聚合物(Extracellular Polymeric Substances,EPS)合成的影响因素,为膜生物反应器的良好运行提供理论基础和实验依据.方法采用动态实验装置(膜生物反应器),通过对BOD、MLSS等的检测,研究污泥负荷、pH和DO对胞外聚合物合成的影响.结果研究发现污泥负荷对胞外聚合物合成的影响显著,污泥负荷宜控制在0.6 BOD-kg/(MLSS kg.d).pH对EPS合成影响次之,pH宜为7.1.DO对EPS合成影响最小,DO宜控制在2.1 mg/L.结论污泥负荷降低有利于EPS的合成,这支持了低负荷下微生物发生自溶的现象。溶解氧质量浓度升高和pH值偏碱时亦有利于EPS的合成.EPS is the dominant pollutant for the MBR pollution and meanwhile it plays an important role in sludge settlement and floceulation. In order to offer rationale and experimental basis for practical application, an experiment is carried out to study the influencing factors of EPS synthesis in MBR. Through the dynamic experiment, three factors are studied, i. e. sludge loading, pH and DO. The result shows that sludge loading has much stronger influence on EPS synthesis than pH while DO has little influence. The best environment of EPS synthesis is also obtained：the sludge loading is 0.6 BOD kg/（MLSS kg·d）, the DO is 2.1 mg/L, and the pH is 7.1. When the sludge reduces, with DO hoisting and pH a little bit alkalescent, EPS can be synthesized easily.

关 键 词：MBR EPS 污泥负荷 DO pH 

分 类 号：X703[环境科学与工程—环境工程]