营养物缺乏引起的丝状污泥膨胀研究

营养物的比例以及含量是污泥膨胀能否形成的重要因素.各种微量元素在微生物生长过程需要的量非常之少,但作为其生长中一种必不可少的营养物质,占据了与碳、氯、磷、氧等同样的地位.若底物中缺少这些营养物质,会抑制或终止许多生物化学反应,降低营养敏感型微生物的活性和底物降解能力,改变微生物类群和数量.使低营养型微生物,如某些丝状菌得以过量增殖,出现污泥膨胀问题.

Research on the Filamentous Sludge Bulking Caused by Lack of Nutrients

The proprfion and percentage of nutrients in the substrate contributes to the forming of sludge bulking. All kinds of mining dements are needed not more in the growing of microorganisms,but as the necessary nutrients,they are as important as the majority dements. If these nutrients are shortened,many biochemical reaction will be restrained and terminated,the activities and degradation capability of the microorganisms wil be lowered, and the population and the quantity of the microorganisms will be changed too. If some filamentous bacteria are spread quleldy,which are caused by the lack of nutrients, sludge bulking will be formed at last.