摘要
为实现同时除磷脱氮,以单级SBR中的好氧颗粒污泥为研究对象,在温度为25℃、pH值为7~8、厌氧反应80~90 min、好氧反应240min、曝气阶段的DO为1~2 mg/L、SRT为20 d的运行条件下进行了研究.结果表明,大量反硝化聚磷菌能够与硝化菌在颗粒污泥中共存并富集,反硝化聚磷菌占全部聚磷菌的73.1%;系统处于稳态时对氮、磷和有机碳具有非常稳定的去除效果.当进水氨氮、磷和乙酸碳浓度分别为25~50、8~15、100~180 mg/L,MLSS为7.0g/L,MLVSS为6.4g/L时,对氨氮、总无机氮、磷、乙酸碳的平均去除率分别为97.8%、89.7%、96.8%和98.8%.
Simultaneous nitrogen and phosphorus removal was achieved by aerobic granular sludge in single sequencing batch reactor (SBR) under the conditions of temperature 25 ℃, pH 7-8, anaerobic reaction time 80-90 min, aerobic reaction 240 min, DO 1-2 mg/L at aeration period, and SRT 20 d. The result shows that a great number of denitrifying phosphorus-accumulation organisms (PAOs) can be enriched in granular sludge in coexistence with nitrifiers, and the denitrifying PAOs accounts for (73.1)% of total PAOs. At steady operation, the system shows stable removal efficiency for nitrogen, phosphorus, and organic carbon. The average removal rate of ammonia nitrogen, total inorganic nitrogen, phosphorus, and acetate-C reaches 97.8%, 89.7%, 96.8%, and 98.8% respectively at the influent concentration of ammonia nitrogen 25-50 mg/L, phosphorus 8-15 mg/L, and acetate-C 100-180 mg/L, as well as MLSS 7.0 g/L and MLVSS 6.4 g/L in the system.
出处
《中国给水排水》
CAS
CSCD
北大核心
2005年第2期18-22,共5页
China Water & Wastewater
基金
国家自然科学基金资助项目(50478054)
国际科技合作重点项目(2004DFA06200)
关键词
好氧颗粒污泥
同时除磷脱氮
反硝化聚磷菌
aerobic granular sludge
simultaneous nitrogen and phosphorus removal
denitrifying phosphorus-accumulating bacteria