摘要
在以限制混合液溶解氧浓度方式运行的M BR反应器中,通过改变进水COD/TKN、混合液DO浓度等工艺参数,研究了对系统中同步硝化反硝化(SND)过程的影响因素。根据试验结果探讨了M BR系统中所实现的SND机理,同时对系统中存在的异养硝化细菌进行了分离培养,并对其硝化特性进行了初步研究分析。试验结果表明:影响系统SND的主要因素是进水COD/TKN和反应器中控制的混合液DO浓度。系统中存在一定量的异养硝化菌。
In this literature, the factors affecting SND in MBR were studied. Performance of membrane bioreactor (MBR) under different levels of COD/TKN (carbon-nitrogen) values and dissolved oxygen (DO) concentrations was evaluated. Bacteria were isolated from the system in which the efficiency of nitrogen removal was up to 80%. Results suggest that bacteria present in the system are able to nitrify via a heterotrophic pathway which is named heterotrophic nitrification. The factors which affect SND in MBR are COD/TKN value, DO concentration and so on.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2006年第1期7-9,27,共4页
Environmental Science & Technology
基金
国家自然科学基金资助项目(20176027)
关键词
SND
异养硝化
MBR
硝化特性
simultaneous nitrification and denitrification
heterotrophic nitrification
membrane bioreactor
nitrifying
