CBAF对污水厂二级出水的脱氮性能研究

Study on Combined Biological Aerated Filter for Nitrogen Removal from Secondary Effluent from WWTP

采用复合式曝气生物滤池对深圳市某污水处理厂二级出水进行强化脱氮的中试研究。结果表明,在以葡萄糖为外加碳源的情况下,该滤池对氨氮和总氮的平均去除率分别达93%和45%,出水氨氮和总氮的平均浓度分别为1.2和12.3 mg/L。合理的外加碳源投加量不会对出水有机物浓度产生不利影响。试验期间,该滤池的出水水质符合《城市污水再生利用景观环境用水水质》(GB/T 18921—2002)和《城市污水再生利用城市杂用水水质》(GB/T 18920—2002)的相关要求。

The combined biological aerated filter （CBAF） was used to enhance nitrogen removal from secondary effluent of a WWTP in Shenzhen. The pilot-scale results show that when using glucose as external carbon source in the CBAF, the average removal rates of ammonia nitrogen and total nitrogen can reach 93% and 45% , and their concentrations in the effluent are 1.2 mg/L and 12.3 mg/L respectively. Furthermore, appropriate dosage of external carbon source does not produce adverse effect on the removal of organic pollutants. The effluent quality accords with the relevant requirement in the Reuse of Urban Recycling Water-Water Quality Standard for Scenic Environment Use（ GB/T 18921 -2002 ）and Reuse of Urban Recycling Water-Water Quality Standard for Urban Miscellaneous Water Consumption （ GB/ T 18920 - 2002）.