LIUWen-jing,ZHANGKe-feng,DINGWan-de.Effect of Starch/Polyvinyl Alcohol Solid Carbon Sources on Nitrogen Removal of Tail Water from Municipal Wastewater Treatment Plant[J].China Water & Wastewater,2024,40(5):75-81.
Effect of Starch/Polyvinyl Alcohol Solid Carbon Sources on Nitrogen Removal of Tail Water from Municipal Wastewater Treatment Plant
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第40卷
Number:
第5期
Page:
75-81
Column:
Date of publication:
2024-03-01
- Keywords:
- tail water from WWTP; advanced nitrogen removal; solid carbon source; starch/polyvinyl alcohol; high-throughput sequencing
- Abstract:
- This paper investigated the effect of solid carbon sources packed columns on nitrogen removal from low carbon to nitrogen ratio wastewater under different hydraulic retention times (HRT), so as to solve the problem of insufficient carbon sources in tail water from municipal wastewater treatment plants(WWTPs). After 20 days of operation, the biofilm on the packing media gradually matured and the effluent quality was stable. When the HRT was 4 hours, the nitrogen removal rate remained above 90%, the effluent COD was always below 40 mg/L, and no accumulation of NO2--N was observed. In addition, NH4+-N was detected in the effluent from the reactor, indicating that there might be a process of dissimilatory nitrate reduction to ammonia (DNRA). In the process of microbial action and physical leaching, the release of organic carbon from solid carbon sources accounted for 81.74% and 18.26% of the total carbon release, respectively, indicating that the main reason of carbon release was caused by microbial action. The high-throughput sequencing results showed that the genera such as Thauera, Zoogloea, Cloacibacterium and Macellibacteroides were the predominant bacteria with high relative abundance. In addition, Desulfovibrio was detected in the reactor, which might be related to the detection of NH4+-N in the effluent.
Last Update:
2024-03-01