生物脱氮除磷工艺中的丝状菌

在生物脱氮除磷工艺中，污泥膨胀是运行管理的难题。介绍了生物脱氮除磷工艺中丝状菌的种类和数量的变化，数据表明，生物脱氮除磷工艺中的丝状菌主要是微丝菌，其次是0675型和0914型菌。经分析认为，污泥龄的增加会促进丝状菌长度的明显增长并导致污泥膨胀，生物残渣的浓度是造成长泥龄污泥膨胀的原因之一。厌氧阶段有分解生物残渣的功能，可改善菌胶团菌的微环境，从而抑制丝状菌的过剩生长，控制污泥膨胀。

The filamentous bacteria in nutrient and phosphorus removal system

The expanding of sludge is a managing problem in nutrient and phosphorus removal system. This paper introduced the results of microscopic examination of filamentous organisms in biological nutrient removal system. The data show that the dominant filamentous bacteria are M.parvicella and secondary dominant bacteria are Type 0675 and Type 0914. After analysis authors advance that the wreckages of cells is harmful to the floc-forming bacteria. The anaerobic stage has the effect to digest a part of wreckage of cells in return sludge, which can improve micro-environment of floc-forming bacteria, restrain overmuch growth of filamentous organisms and control sludge expanding.