CANON颗粒污泥高效脱氮及处理生活污水实验研究

Efficient nitrogen removal from domestic wastewater by CANON granular sludge

摘要:

为研究全程自养脱氮(CANON)颗粒污泥高效脱氮及处理生活污水的可行性,应用SBR反应器,首先在高氨氮条件下,通过搅拌快速启动CANON颗粒污泥,然后通过提高污泥质量浓度短时间内快速提升脱氮效能,最后研究了该工艺在生活污水中应用的可行性.结果表明：CANON颗粒污泥在40 d内成功启动,126 d颗粒粒径为760 μm,负荷达1.01 kg/(m³d),多糖与蛋白质比值变化与粒径增长相关；通过外加颗粒污泥,77 d内总氮去除负荷迅速提高到3.22 kg/(m³d)；在处理生活污水实验中实现了氮素和有机物的同步去除,可以有效应用于常温生活污水脱氮.

Abstract:

The feasibility of CANON granular sludge for efficient nitrogen removal from domestic wastewater was investigated in SBR. Firstly, CANON granular sludge was started by stirring under high ammonia concentration conditions, then granular sludge was increasingly added to improve the performance of nitrogen removal. Finally, the feasibility for domestic wastewater treating was investigated. The results show that CANON granular sludge could start-up within 40 days, the size of granular sludge reached 760 μm and the total nitrogen removal rate reached 1.01 kg/(m³d) within 126 days. A linear relationship between the ratio of polysaccharide and protein and the particle size growth was found. The total nitrogen removal rate increased rapidly to 3.22 kg/(m³d) within 77 days by adding granular sludge. Simultaneous removal of nitrogen and COD proved that the CANON granular sludge could be applied as an efficient approach for treating domestic wastewater.