流离球填料强化低温脱氮及填充率优化

为探究低温条件下流离球填料的最佳内部填充率,采用同一规格的流离球,选取18. 3%、24.4%、30. 5%、36. 6%、42. 7%等5种内部填充率,构建SBBR反应器,并控制水温为(10±1)七,在外部填充率、曝气量、进水水质等都相同的条件下运行。结果表明,投加内部填充率为30.5%及36. 6%流离球填料的SBBR反应器对氮的去除效果较好,NH;- N及TN平均去除率分别达到了 65%和62%以上,同时两者的系统总生物量以及生物活性均相近。综合考虑资源节约以及降低能耗,确定低温下流离球最佳内部填充率为30. 5%。

Flow-separated Ball Filler for Enhanced Nitrogen Removal under Low Temperature and Its Internal Filling Rate Optimization

In order to investigate the optimal intemal filling rate of flow-separated ball filler under low temperature, the same size of flow-separated ball was used. Five internal filling rates of 18. 3%, 24. 4%, 30. 5%, 36. 6%, and 42. 7% were selected. The SBBR reactor was constructed and the water temperature was controlled at ( 10 ± 1 )弋.The operation was performed under the same conditions as the external filling rate, aeration rate, and influent quality. The results showed that the SBBR reactors with internal filling rates of 30.5% and 36. 6% had better removal effect for NH;- N and TN, and the average removal rates reached above 65% and 62%, respectively. At the same time, their total biomass and biological activity were similar. Considering resource conservation and reducing energy consumption, the optimal intemal filling rate of the ball under low temperature was determined to be 30. 5%.