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.
悬浮填料对大型污水处理厂运行的实际强化效果
- Title:
- Enhancing Effects of Suspended Packing Media on Operation of Large-scale Wastewater Treatment Plants
- Keywords:
- suspended packing media; wastewater treatment plant; nitrification; denitrifying phosphorus accumulating bacteria
- 摘要:
- 以两座大型污水处理厂为研究对象，分析了悬浮填料对生物处理系统的强化效果。结果表明，投加悬浮填料对有机物的削减能力影响不大，但提高了系统的抗冲击性能。投加填料促进了硝化菌的富集，但菌属类型受投加位置影响，填料位于好氧池前段有利于氨氧化菌（norank_f__JG30-KF-CM45和Ellin6067）的富集，位于后段则利于亚硝酸盐氧化菌（Nitrospira）的富集。悬浮填料提高了系统中反硝化菌的种类和丰度，并富集了好氧反硝化菌（Hyphomicrobium、Flavobacterium和Dokdonella），一定程度上提高了工艺的脱氮性能。值得注意的是，悬浮填料易于实现反硝化聚磷菌（DPB）的富集，可使DPB在聚磷菌（PAOs）中的占比达71.3%及以上。
- 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.
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