摘要
膜污染一直是影响膜生物反应器(MBR)工艺稳定运行的难题。试验研究了浮球填料的加入对好氧管式膜MBR工艺中膜污染的影响规律及机理。结果表明,生物载体的加入能够显著减缓膜污染。与没有生物载体的MBR相比,载体填充率达到40%时可使滤饼层阻力下降约60.7%,孔堵阻力下降约90.6%,单周期运行时间延长约83.3%。机理分析表明,载体型MBR中悬浮污泥粒度明显增大,不可逆膜污染主要组分溶解性胞外聚合物(EPS)含量显著减少,而且EPS中蛋白质相对比例增加,滤饼层与膜面间的结合程度减弱,可改善低压冲洗和化学清洗效果。
Membrane fouling is recognized as a problem that affects the stable operation of the membrane bioreactor(MBR)process.In this paper,the influence law and mechanism of floating ball carriers on membrane fouling in tubular membrane MBR process was studied.The experimental results suggested that the addition of biocarriers significantly alleviated membrane fouling.Compared with the MBR without carriers,in MBR with 40%filler filling rate,the cake layer resistance was reduced by about 60.7%,and the pore blocking resistance was reduced by about 90.6%,which resulted in about 83.3%extension in single cycle operation time of MBR.Mechanism analysis suggested that the particle size of the suspended sludge in MBR with carriers was significantly increased.The dissolved extracellular polymeric substance(EPS)on the membrane surface,which was the main component of the irreversible membrane fouling,was significantly reduced.Moreover,the relative proportion of protein in EPS increased,and the binding between the entire fouling layer and the membrane surface was weakened,thereby improving the effect of low-pressure flushing and chemical cleaning.
作者
范辉
高燕宁
刘克成
魏伟
FAN Hui;GAO Yanning;LIU Kecheng;WEI Wei(Electric Power Research Institute,State Grid Hebei Electric Power Co.,Ltd.,Shijiazhuang 050021,China;Tianjin Yiweixin Technology Co.,Ltd.,Tianjin 300384,China)
出处
《净水技术》
CAS
2023年第2期103-108,共6页
Water Purification Technology
基金
国家电网有限公司科技项目:电站生产污水、雨水与生活污水交叉利用资源化技术研究及应用(kj2020-066)。
