XUEGang,HEYue-ling,WANGXiao-nuan,et al.Pilot Study of Sulfur-driven Autotrophic Denitrification for Advanced Nitrogen Removal in Secondary Effluent of Dyeing Wastewater[J].China Water & Wastewater,2022,38(13):15-21.
Pilot Study of Sulfur-driven Autotrophic Denitrification for Advanced Nitrogen Removal in Secondary Effluent of Dyeing Wastewater
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第38卷
Number:
第13期
Page:
15-21
Column:
Date of publication:
2022-07-01
- Keywords:
- dyeing wastewater; sulfur-driven autotrophic denitrification; filter; advanced nitrogen removal
- Abstract:
- The external carbon source was required for nitrogen removal by heterotrophic denitrification, contributing a majority of operational cost in wastewater treatment. So, the pilot study of sulfur-driven autotrophic denitrification filter with no external carbon source was carried out. During a continuous 84-day operating period, the optimal TN removal of 74.1% was achieved at the hydraulic loading of 1.27 m3/(m2·h) and nitrogen loading rate of 0.52 kg/(m3·d). A certain amount of NH4+-N removal was attributable to microbial assimilation. The pH, alkalinity and ORP decreased after treatment, showing that the reductive S0 participated in the NO3--N reduction by autotrophic denitrifying bacteria. Compared to heterotrophic denitrification, sulfur?driven autotrophic denitrification has lower operational cost and biomass yield, along with no emission of CO2 greenhouse gas converted from external carbon source.
Last Update:
2022-07-01