ZHANGRao,XUXiao-chen,WANG Ye-xin,et al.Sulfur Autotrophic Denitrification for Advanced Treatment of NO3--N in Effluent from Biochemical Treatment Process of Wastewater Treatment Plant[J].China Water & Wastewater,2022,38(15):21-28.
Sulfur Autotrophic Denitrification for Advanced Treatment of NO3--N in Effluent from Biochemical Treatment Process of Wastewater Treatment Plant
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第38卷
Number:
第15期
Page:
21-28
Column:
Date of publication:
2022-08-01
- Keywords:
- effluent from biochemical treatment process of WWTP; nitrate nitrogen (NO3--N); sulfur autotrophic denitrification; biofilter; water temperature
- Abstract:
- A pilot scale test of elemental sulfur autotrophic denitrification in the biofilter was carried out to remove the residual NO3--N in the effluent from A2O process of a wastewater treatment plant (WWTP) in Hohhot. Elemental sulfur autotrophic denitrification process had a short start?up period (15 days) and a strong NO3--N removal capacity. The NO3--N removal load (calculated by nitrogen) could remain above 200 g/(m3·d). During the start?up process, Thiobacillus gradually became the dominant bacterium, and sulfur autotrophic denitrification became the main metabolic pathway of the biofilter. In addition, water temperature had a certain impact on the performance of the process. When the water temperature was less than 15 ℃, the microbial community composition in the biofilter was affected to a certain extent, and the average NO3--N removal load decreased rapidly to 122.7 g/(m3·d). Even if the hydraulic retention time was extended, the system could not recover to the optimal state.
Last Update:
2022-08-01