低溶解氧和磷缺乏引发的非丝状菌污泥膨胀及控制  

Non-filamentous Sludge Bulking Caused by Low Concentration of Dissolved Oxygen and Phosphorus Deficiency and Its Control

作　　者：王建芳[1] 赵庆良[1] 林佶侃 金文标[3] 肖本益[4] 

机构地区：[1]哈尔滨工业大学市政环境工程学院,哈尔滨150090 [2]金迪生物科技集团,广东东莞523581 [3]哈尔滨工业大学深圳研究生院,深圳518055 [4]中国科学院生态环境研究中心,北京100085

出　　处：《环境科学》2007年第3期545-550,共6页Environmental Science

摘　　要：针对污泥培养过程中出现的非丝状菌污泥膨胀,分析了发生膨胀后污泥的特征、性状及其降解污染物性能.反应器中低溶解氧浓度(0～0.7mg/L)和低P/BOD5值(0.78/100)2种因素共同作用导致污泥膨胀.污泥胞外多聚糖含量越高,污泥憎水性越小,SVI也越高.通过提高溶解氧浓度和P/BOD5值,可使污泥沉降性能得到恢复.此外,向膨胀污泥中投加多孔填料,在不降低处理效能的情况下,很快使系统免受污泥沉降性能恶化的困扰,而向膨胀污泥中投加强氧化剂NaClO并不能有效控制污泥膨胀.Non-filamentous sludge bulking occurred during sludge acclimation in lab-scale bio-reactors and the characteristics, properties and degrading pollutants capability of non-filamentous sludge were analyzed. Both low DO concentration （0 - 0. 7 mg/L） and low ratio of P/BOD5 （0.78/100） resulted in excessive proliferation of viscous zoogloea and sludge bulking. SVI was directly proportional to extracellular polysaccharides and was inversely proportional to hydrophobicity of sludge. The sludge bulking could be effectively controlled by increasing DO concentration and P/BOD5 ratio. Besides, adding some porous padding into viscous bulking sludge was a useful method which might avoid the deterioration of sludge settlement and maintain good performance in the system. The viscous bulking sludge could not be controlled by addition of NaClO.

关 键 词：非丝状菌膨胀 憎水性 胞外多聚糖 低溶解氧 磷缺乏 

分 类 号：X703.1[环境科学与工程—环境工程]