生物倍增工艺对于长效预防污泥膨胀的作用探讨  

Discussion on Action of Bio-doubling Process on Long-effect Prevention of Sludge Bulking

作　　者：周成金[1] 何文杰[1,2] 张甜甜[3] 田海宁 康华[5] 

机构地区：[1]哈尔滨工业大学市政环境工程学院,黑龙江哈尔滨150090 [2]天津市自来水集团有限公司,天津300040 [3]天津市华宇膜技术有限公司,天津300100 [4]天津市城市建设学院环境与市政工程系,天津300384 [5]长春工程学院水利与环境工程学院,吉林长春130012

出　　处：《环境科学与技术》2013年第4期168-172,181,共6页Environmental Science & Technology

摘　　要：结合工程实例,探讨了实际应用中生物倍增工艺表现出良好的污泥沉降性能的原因。指出工艺提供的均匀微孔曝气以及低溶解氧的实时自动控制避免了氧限制型污泥膨胀的发生;实时控制下的大比倍循环稀释特点使其具有较强抗冲击负荷能力,可避免低温、低负荷型污泥膨胀的发生;长泥龄运行使MLVSS/MLSS由0.71降低到0.66,污泥中活性比例的降低也有助于形成好的污泥沉降性能;此外,从生态学角度分析了高污泥浓度使活性污泥系统中丝状菌的自然控制力得到加强,提出利用高污泥浓度来预防污泥膨胀的生态学方法。The reasons why bio-doubling process can always show good sludge settleability in practice were discussed based on project instance. It was found that uniform aeration provided by implementation of fine bubble aerators, and real time control of low oxygen concentration would avoid the oxygen-limited sludge bulking. High dilution ratio of circulating mixed liquid by real time control served the system strong shock load resistance to avoid sludge bulking probably caused by low temperature or low F/M. MLVSS/MLSS ratio was decreased from 0.71 to 0.66 under long sludge retention time, the decreasing activated proportion of biomass would also favor good sludge settleability. The way of increasing sludge density for long effect prevention of sludge bulking was proposed, as the high sludge can form natural control power against the filamentous organism strengthened from ecology angel.

关 键 词：生物倍增工艺 污泥膨胀 均匀曝气 大循环比 微生物活性比例 

分 类 号：X703.1[环境科学与工程—环境工程]