用一体化生物膜反应器处理生活污水

根据生物脱氮原理,设计了一体化生物膜反应器,用于生活污水的处理。将反应器运行2个月,探讨反应器对有机物和氮的去除,同时采用聚合酶链式反应与变性梯度凝胶电泳(PCR-DGGE)方法对反应器好氧区和缺氧区微生物种类和多样性进行分析。结果表明:该反应器通过设置好氧和缺氧2种环境,并且通过内循环回流,形成“前置式反硝化系统”可达到较好地去除有机物和氮的目的,其中水力停留时间为影响硝化作用的重要参数。在反应器的好氧区有同步硝化反硝化现象发生。

Use of integrative biofilm reactor for domestic wastewater treatment

An integrative biofilm reactor was designed to treat domestic wastewater using conventional biological nitrogen removal.The organic matter and nitrogen removal was analyzed while running the reactor for two months.The polymerase chain reaction and denaturing gradient gel electrophoresis(PCR-DGGE) method was used to analyze the microbial species diversity.The tests show that with inner loop recirculation,the forward-type denitrification system effectively removes organic matter and nitrogen.The hydraulic retention time is an important parameter for nitration during nitrogen removal.The PCR-DGGE results indicate that the nitrification bacteria and the denitrification bacteria coexist in an aerobic area,which leads to simultaneous nitrification and denitrification there.