WANGLi-hua,WANGKun,ZHOUChuan-ting,et al.Enhancing Effects of Suspended Packing Media on Operation of Large-scale Wastewater Treatment Plants[J].China Water & Wastewater,2024,40(9):77-83.
Enhancing Effects of Suspended Packing Media on Operation of Large-scale Wastewater Treatment Plants
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第40卷
Number:
第9期
Page:
77-83
Column:
Date of publication:
2024-05-01
- Keywords:
- suspended packing media; wastewater treatment plant; nitrification; denitrifying phosphorus accumulating bacteria
- Abstract:
- This paper analyzed the enhancing effect of suspended packing media on the biological treatment systems in two large-scale wastewater treatment plants. The addition of suspended packing media had little effect on the removal capacity of organic matters, but improved the impact resistance of the system. The addition of packing media promoted the enrichment of nitrifying bacteria, but the species of bacteria was affected by the location of packing media. The packing media in the front section of the aerobic tank was conducive to the enrichment of ammonia oxidizing bacteria (norank_f__JG30-KF-CM45 and Ellin6067), while the packing media in the back section was conducive to the enrichment of nitrite oxidizing bacteria (Nitrospira). The suspended packing media increased the diversity and abundance of denitrifying bacteria in the system, and enriched the aerobic denitrifying bacteria (Hyphomicrobium, Flavobacterium and Dokdonella), which improved the nitrogen removal performance of the process to a certain extent. In particular, the suspended packing media was easy to achieve the enrichment of denitrifying phosphorus accumulating bacteria (DPB), which increased the proportion of DPB in phosphorus accumulating bacteria (PAOs) up to 71.3% or more.
Last Update:
2024-05-01