通过好氧选择池防止污泥膨胀

在污水处理厂中 ,经常发生由于丝状菌 0 2lN引发的活性污泥膨胀 .污水中的有机污染物约含 70 %的易于降解的溶解性物质 .当液相中易于降解的有机物质在选择池中去除的不完全 ,丝状细菌就会快速增长 .易生物降解的物质在选择池中主要通过生物相的吸附和贮存而得以去除 .选择池中用于生物贮存的需氧取决于有机物的类型 .为保持选择池的吸附能力 ,污泥必须在曝气池中进行再生 .一旦发生超负荷或供氧量及营养物质不足 ,贮存能力不能得到恢复 ,好氧选择池也就失去了效果 .通过研究对选择池中去除易生化降解物质的影响因素 ,发现了好氧选择池设计的简单计算方法 ,并得出了一个模型 .

Prevent s1udge from filamentous organisms bulking by aeration blogical selector

Activated sludge bulking arisen by filamentous organism 021N frequently occurs in wastewater treatment plant.There is about 70% of soluble and degradable substances.The filamentous organism is rapidly propagated in liquid phase unless the organism is degraded completely.In the selector,most of organism can be removd by means of absorption and reservation of the organism.The type of organism determines the absorbent activity If either excessive loading rate or insufficient oxygen nutrition is used,no selector can resume its reservation funcion and thus the effect is lost.Here,we present a model for simulation of removing the biologcally degradable matter.A simple algorthm to the analysis of related influence factors is formulated.