单一反应器城市生活污水深度处理实验研究

Experimental study on advanced treatment of domestic wastewater with single reactor

采用单一反应器,在常温低溶氧(DO)条件下,进行了深度处理城市污水的实验研究。结果表明,向具有亚硝化功能的反应器中接种厌氧氨氧化菌后,可实现城市污水的同步亚硝化-厌氧氨氧化反应,TN去除率达到92.4%;继续向反应器接种聚磷菌后,可实现单一反应器内城市污水的深度处理,相应的去除率分别为93.6%、77.1%、99.3%。系统运行过程中,可将DO=1 mg/L作为反应终点的指示参数;TN和NH4+-N在反应过程中的浓度变化有较好的线性相关关系,相关系数均大于0.999。

In the conditions of room temperature and low DO, the wastewater advanced treatment with a single reactor is studied. The tests show the synchronous nitrification-anammox reaction for municipal wastewater can be carried out through inoculating anammox bacteria to the reactor with nitrification ability, and its removal rate can reach 92.4%. The advanced treatment of domestic wastewater by the single reactor can be carried out after inoculating PAOs again, and their corresponding removal rate can be 93.6%, 77.1%, 99.3%, respectively. DO = 1 mg/L can be considered as the indication parameter of system reaction terminal. There is good hnearity correlativity between TN and NH4^＋ -N for the concentration change in the reaction process. The correlation coefficient are all more than 0. 999.