Orbal氧化沟同时硝化/反硝化及生物除磷的机理研究

对６个采用分段，闭环沟道的Ｏｒｂａｌ氧化沟工艺运行数据进行了分析评定，以确定在该工艺中同时发生生物脱氮除磷的程度，较低的总氮出水浓度表明，同时硝化／反硝化在Ｏｒｂａｌ工艺中很易发生。由于泥龄较长并保持外沟道低溶解氧，有利于硝化菌的生长并提高脱氮效率；由于每个沟道处于相对均匀混合的状态，因此沟道内没有明显的好氧或缺氧段之分，表明产生反硝化的必要的缺氧环境可能发生在菌胶团内部。

THESES AND RESEARCHESStudy on the Mechanism of Simultaneous Nitrification/Denitrification and Biological Phosphorus Removal in Orbal Oxidation Ditch

An analysis on operating data from six wastewater treatment plants using the Orbal process with serially looped channels was carried out. It was ascertained by analytical results that simultaneous biological nutrient removal (SBNR) effectively occurred in Orbal system due to the favorable conditions created by this process. It has been considered in the assunption of this study that the occurrence of SBNR in Orbal system is based on three principles:(1)the mixing pattern in the biological reactor will lead to create anoxic/anaerobic zone for bilolgical nutrient removal, i.e. macroenvironment. (2) the anoxic/anaerobic zone can be formed within zoogloea in the biological reactor, i. e. microenvironment. (3) new and special microorganisms exist in the syste. The purpose of this study is to identify the factors affecting the function of above-mentioned principles for SBNR system.