SBR法处理生活污水时非丝状菌污泥膨胀的发生与控制  

Non-filamentousactivated sludge bulking in SBR treating the domestic wastewater

作　　者：陈滢[1] 彭永臻[1] 刘敏[2] 甘一萍[3] 王淑莹[1] 

机构地区：[1]北京工业大学水质科学与水环境恢复工程重点实验室,北京100022 [2]四川大学建筑与环境学院,成都610065 [3]北京城市排水集团有限责任公司,北京100022

出　　处：《环境科学学报》2005年第1期105-108,共4页Acta Scientiae Circumstantiae

基　　金：国家自然科学基金重点项目(50138010);北京市教委科研项目(01KJ-001);北京市自然科学基金(8022006);国家"863"计划项目(2003AA60110)

摘　　要：采用序批式活性污泥法(SBR)处理实际生活污水.研究了低溶解氧条件下,有机负荷对污泥膨胀的影响和突然降温对污泥沉降性能的影响.低溶解氧条件下,当有机负荷为0 20kg·(kg·d)-1和0 26kg·(kg·d)-1时,活性污泥中虽然有丝状菌存在,但并没有发生污泥膨胀.有机负荷达到0 57kg·(kg·d)-1时,菌胶团过量生长,发生非丝状菌污泥膨胀.提高溶解氧,降低有机负荷可使污泥沉降性能恢复正常.突然降温,也会导致非丝状菌污泥膨胀.恢复温度后,膨胀现象可得到控制.非丝状菌污泥膨胀除了没有丝状菌过量增殖外,还具有污泥有粘性,泥水混合液难过滤的特点.The effects of sludge loads under low DO condition and temperatures on activated sludge settle ability in a Sequencing Batch Reactor (SBR) fed with domestic wastewater were investigated. Though the system was kept in low DO levels, the sludge settled properly at sludge load of 0.20kg·(kg·d)^(-1) and 0.26(kg·(kg·d)^(-1)), respectively. Deterioration of SVIs was observed after increasing sludge load to 0.57kg·(kg·d)^(-1), which was related to the excessive growth of Zoogloea colonies. Through increasing DO and decreasing sludge load, the zoogloea flocs gradually changed to the well-settling sludge. The non-filamentous activated sludge bulking also occurred when the temperature was decreased sharply. After increasing the temperature to the original level, the sludge bulking was controlled effectively and the low SVI was recovered. When the non-filamentous activated sludge bulking occurred, the sludge had a jelly-like viscous consistency and became hard to filter.

关 键 词：非丝状菌污泥膨胀 有机负荷 污泥沉降性能 SBR法 生活污水 溶解氧 序批式活性污泥法 处理 过量 正常 

分 类 号：X703[环境科学与工程—环境工程] X793