Nitrogen Transformation and Microbial Spatial Distribution in Drinking Water Biofilter

3rd International Conference on Advances in Energy Resources and Environment Engineering

能源学;生态环境科学

Qian, Yongxing^1 ; Zhang, Huining^1 ; Jin, Huizheng^2 ; Wu, Chengxia^2

Ningbo Institute of Technology, Zhejiang University, 1 Qianhu South Road, Ningbo, China^1

Henan Technical College of Construction, Middle of Industrial Roa., Zhengzhou, China^2

关键词: Ammonia nitrogen removal;    Disinfection process;    Mutual transformations;    Nitrification and denitrification;    Nitrogen loss;    Nitrogen transformations;    Removal rate;    Total phosphorus;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/113/1/012072/pdf
DOI  :  10.1088/1755-1315/113/1/012072

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Well understanding the rule of nitrogen mutual transformation in biofilters is important for controlling the DBPs formation in the subsequent disinfection process. Ammonia nitrogen removal effect and nitrogen transformation approach in biofilter of drinking water was researched in the study. The biofilter removed ammonia of 48.5% and total phosphorus of 72.3%. And the removal rate of TN, NO3--N, DON were 37.1%, 33.1%, 46.9%, respectively. Biomass and bioactivity of different depth of the biofilter were determined, too. The overall distribution of biomass showed a decreasing trend from top to bottom. The bioactivity in lower layer gradually increased. Especially the bioactivity of heterotrophic microorganisms showed a gradual increase trend. The amount of the nitrogen loss was 3.06mg/L. Non-nitrification pathway of "nitrogen loss" phenomenon in biofilter might exist assimilation, nitrification and denitrification in autotrophic.