摘要
研究了反硝化生物滤池的挂膜启动过程，寻求判断启动完成的快速、简便、合理的方法，为反硝化生物滤池的挂膜提供理论依据。控制水力负荷在0．022m^3／（m^2·h）即HRT为14h，水温为25～27℃，反硝化生物滤池运行14d后对硝态氮的去除率达到99％，第15天平均进水硝态氮浓度由21．86mg／L减小到8．05mg／L，出水浓度基本保持不变，仍稳定在0～1mg／L．反硝化系统生态结构稳定，表明挂膜成功。当有机碳源充足、NO3^-N浓度〉0．1mg／L时，反硝化速率与NO3^-N浓度遵循零级反应动力学规律。反硝化生物滤池中的氨氮主要由微生物同化作用去除，去除率约为28．9％。
The biofilm formation and startup of denitrification biofiher were studied to find a fast, simple and reasonable method for judging the completion of biofilm formation and startup, which could provide the theory basis for biofilm formation in the denitrification filter. At the hydraulic loading of 0. 022 m^3/（ m^2 · h） （HRT--14 h） and the water temperature of 25 to 27℃, the removal rate of nitrate nitrogen reached 99% after 14 d of operation. On the fifteenth day, the average concentration of nitrate nitrogen in the influent decreased from 2t. 86 mg/L to 8.05 mg/L, and the concentration in the effluent was approximately unchanged and remained stable at 0 to 1 mg/L. The ecological structure of the denitri- fication system kept stable, indicating the success of the biofilm formation. The denitrification rate and the concentration of NO3^- - N followed the zero order kinetics when the organic carbon source was suffi- cient, and the concentration of NO3^- - N was higher than 0.1 mg/L. The ammonia-nitrogen in the deni- trification biofiher was mainly removed by microbial assimilation, with a removal rate of 28.9%.
出处
《中国给水排水》
CAS
CSCD
北大核心
2015年第3期1-4,共4页
China Water & Wastewater
关键词
反硝化生物滤池
挂膜
动力学
同化
denitrification biofilter
biofilm formation
kinetics
assimilation
