造纸废水接触氧化反应器的启动及微生物特性研究

Study on Starting and Microorganism Characteristic of Contact Oxidation Reactor for Papermaking Wastewater

采用逐渐增加进水COD浓度、减小水力停留时间的方法启动接触氧化反应器,反应器启动34 d后,COD的总去除率稳定在88%,邻苯二甲酸和二甲苯的总去除率分别达到75%和78%。沿水流方向,细菌数量随有机物质的减少而逐渐减少,生物膜厚度呈递减趋势,兼氧、好氧段依次出现游泳型鞭毛虫、游泳型纤毛虫、固着型纤毛虫。

The contact oxidation reactor was started by method of gradually increasing influent COD concn, and decreasing hydraulic retention time. After34 d of reactor starting, the total removal rate of COD was stable at 88% and the total removal rates of phthalic acid and xylene reached 75% and 78% resp.. Along water flow direction, the bacterial number was reduced with the decrease of organic matter and the biofilm thickness decreasing trend. Swimming-flagellate, swimmingciliates and immovable ciliates appeared in order in oxygen compatibility and aerobic section.