前置反硝化生物脱氮工艺实现亚硝酸氮积累的试验研究  

Experimental Study of Nitrite Accumulation in Pre-Denitrification Biological Nitrogen Removal Process

作　　者：吴学蕾[1] 陈伦强[1] 彭永臻[1] 王亚宜[2] 王璞[1] 

机构地区：[1]北京工业大学水环境恢复重点实验室,北京100022 [2]浙江工业大学建筑工程学院,杭州310014

出　　处：《环境科学》2006年第12期2472-2476,共5页Environmental Science

基　　金：国家自然科学基金项目(50478040);国家自然科学基金-国际(地区)重大合作项目(50521140075);北京市重点实验室开放项目

摘　　要：通过试验实现了前置反硝化工艺亚硝酸氮的积累,从温度、pH值、游离氨(FA)浓度、污泥龄、溶解氧(DO)浓度等几个影响亚硝酸氮积累的主要因素逐一分析.采用中试装置在常温条件下处理实际生活污水.在试验开始阶段DO浓度维持在0.5mg/L,出现了亚硝酸氮的积累,随后提高DO浓度到1.5 mg/L以上,亚硝酸氮积累现象随之消失,最后又降低系统中的DO浓度到0.5 mg/L附近,亚硝酸氮积累现象再次出现,由此得出DO是实现亚硝酸氮积累的关键因素.试验发现有效地控制DO浓度在0.5 mg/L可实现亚硝酸氮比较持久稳定的积累.It was realized nitrite accumulation in a pilot-scale pre-denitrification process at normal temperature. The influence factors, temperature, pH, FA and DO, for nitrite accumulation were analyzed. The nitrite was accumulated in the beginning time with the DO kept at 0.5 mg/L, however the phenomenon of nitrite accumulation was vanished when the DO increased to 1.5 mg/L. At last the nitrite accumulation was resumed when DO reduced to 0.5 mg/L. So it could be obtained that DO was the main factor to realize nitrite accumulation in the study. It was found that it was possible to keep stable and high nitrite accumulation effectively control DO at 0.5 mg/L.

关 键 词：前置反硝化 生物脱氮 亚硝酸氮积累 溶解氧浓度 

分 类 号：X703.1[环境科学与工程—环境工程]