摘要
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。采用国际水协（ＩＡＷＱ）活性污泥１号模型（ＡＳＭⅠ）对出水总磷数据分析及观测到的相对于ＢＯＤ负荷的磷的去除表明，生物除磷可能发生。本研究的基本假设认为，同时生物除营养化产生于三个基本原理：①生物反应池的混合形态可以形成生物除营养所必需的缺氧及／或厌氧段，即大环境；②在菌胶团内部形成的缺氧及／或厌氧段，即微环境；③系统中存在新的、专用微生物。上述机理在任何生物除营养化系统中都会有不同程度的发生。本研究的目的是鉴别影响这三个机理在同时生物除营养化系统中所起相对作用的因素。
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.
出处
《中国给水排水》
CAS
CSCD
北大核心
1999年第3期1-7,共7页
China Water & Wastewater
关键词
生物除磷
硝化/反硝化
氧化沟
废水处理
biological treatment biological phosphorus removal simultaneous nitrification/denitrification simultaneous biological nutrient removal oxidation ditch
