厌/缺氧水体COD降解及氮转化规律小试研究  

Organic degradation and nitrogen transformation in oxygen deficient water

作　　者：朱宜平[1] 蒋士力[1] 张海平[1] 陈玲[1] 

机构地区：[1]同济大学环境科学与工程学院,污染控制与资源化国家重点实验室,上海200092

出　　处：《环境污染与防治》2007年第7期510-513,516,共5页Environmental Pollution & Control

基　　金：上海市科技攻关项目(No.04dz12031);同济大学环境科技创新人才培养基金资助项目。

摘　　要：采用取自市区河道的河水,对有无流动两种工况下厌/缺氧水体(DO≤0.50mg/L)COD降解和氮转化规律进行了小试研究。结果表明,无流动工况下COD<60.0mg/L时,即使DO≤0.50mg/L,NH4+-N亦可依靠大气复氧发生缓慢氧化,并有TN损失,其可能途径是厌氧氨氧化;流动工况下,虽然DO≤0.50mg/L,但COD和NH4+-N均能依靠大气复氧进行有氧降解,TN依然有损失。根据小试研究结果,认为在低DO条件下(≤0.50mg/L)进行河道水质模拟时,需要考虑NH4+-N的氧化和TN的减少。Concentration profiles of COD and nitrogen species were obtained for an oxygen deficient river water sample （DO≤0.50 mg/L） in the batch reactor which was operated with and without agitation to simulate a stagnant or flowing river. At a COD〈60.0 mg/L and without agitation, DO from surface re-aeration resulted in slow COD degradation and nitrification and that de-nitrification taking place later resulted in a reduction in total nitrogen. Agitation allowed more oxygen transferred into the liquid phase and thereby enhanced both COD degradation and nitrification although DO was still lower than 0.50 mg/L and that de-nitrification taking place earlier resulted in a more rapid loss in total nitrogen. It is therefore necessary to consider ammonium oxidation and total nitrogen loss in water quality simulation for an oxygen deficient river segment with a DO≤0.50 mg/L.

关 键 词：厌/缺氧水体 COD NH^+4-N NO^-2-N NO^-3-N DO 

分 类 号：X703[环境科学与工程—环境工程]