ZHANG Ling-ling,CAO Yang,GU Miao,et al.Advanced Nitrogen Removal Technology of Municipal Wastewater under High Discharge Standard[J].China Water & Wastewater,2021,37(13 13):27-31.
Advanced Nitrogen Removal Technology of Municipal Wastewater under High Discharge Standard
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第37卷
Number:
13 13
Page:
27-31
Column:
Date of publication:
2021-07-01
- Keywords:
- municipal wastewater; advanced nitrogen removal; deep bed filter; denitrification; carbon source
- Abstract:
- Based on nitrogen components analysis in secondary effluent of a municipal wastewater treatment plant, the nitrogen removal performance, denitrification start-up and influencing factors after the deep bed filter was transformed into the deep bed (denitrification) filter were explored. When water temperature and COD (carbon source) were 24-25 ℃ and 20-35 mg/L, the denitrification process was started after 10 days. Compared with the deep bed filter, the removal efficiency of NO3--N was increased by 23.1%, and the deep bed (denitrification) filter was an effective supplement to the denitrification process of the secondary biological treatment process. The COD consumption of unit mass NO3--N removal by the deep bed (denitrification) filter increased logarithmically with the decrease of water temperature. In low temperature period, an effluent COD guarantee unit should be set if there was a risk of effluent COD exceeding the standard as high carbon source dosage was employed to improve the denitrification efficiency.
Last Update:
2021-07-01