摘要
好氧颗粒污泥应用于生物脱氮,机理为如下几种。第一种为常规硝化-反硝化途径。第二种为亚硝化-反硝化途径,颗粒污泥的外部为好氧的硝化区,通过适当的控制,使硝化过程停留在亚硝化阶段,直接进入内层进行反硝化。第三种为硝化-厌氧氨氧化途径,通过外层的硝化和内层的厌氧氨氧化作用实现脱氮。第四种为硝化-反硝化聚磷方式,颗粒污泥内部在反硝化的同时聚磷,实现好氧颗粒污泥同步脱氮除磷。第五种脱氮的途径为好氧反硝化。在不同的条件下,某一种脱氮的途径可能占主导地位。
The mechanism of nitrogen removal by aerobic granular sludge was summarized and analyzed as following aspects. The first explanation is that nitrogen could be removed by simultaneous nitrification and denitrification process. The second mode is nitrogen removal over nitrite, then was directly denitrified into nitrogen gas. The third approach is the combination of nitrification and anaerobic ammonium oxidation, nitrite produced through the outer of the aerobic granular was reduced into nitrogen with the ammonium by the anaerobic ammonium oxidizers. The fourth possibility is nitrogen removal accompanied by phosphorus elimination, which might be caused by denitrifying phosphorus removing bacteria (DPB) existing in the inner of the granular under anoxic condition. Another way,chich may exist,is denitrification under aerobic conditions.
出处
《净水技术》
CAS
2004年第3期29-31,共3页
Water Purification Technology
基金
国家留学基金委员会资助项目湖南省自然科学基金资助项目(No.WJ2002101)湖南大学科学基金项目(No.200219)
关键词
好氧颗粒污泥
脱氮
硝化反硝化
好氧反硝化
反硝化除磷菌
厌氧氨氧化
aerobic granular sludge mechanism of nitrogen removal simultaneous nitrification and denitrification anaerobic ammonia oxidation denitrifying phosphorus removing bacteria
