宏基因组学揭示了全面改造的一体化固定膜活性污泥工艺：强化脱氮和减少污泥生成。
Metagenomics reveals a full-scale modified integrated fixed-film activated sludge process: Enhanced nitrogen removal and reduced sludge production.
机构信息
Tongji University, College of Environmental Science and Engineering, State Key Lab Pollution Control and Resource Reuse, Shanghai 200092, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China.
Hunan Sanyou Environmental Protection Co. Ltd., Changsha, Hunan, China.
出版信息
Sci Total Environ. 2022 Oct 1;841:156666. doi: 10.1016/j.scitotenv.2022.156666. Epub 2022 Jun 12.
This study provides a side-by-side comparative investigation between the full-scale conventional activated sludge (CAS) and the high-concentration powder carrier bio-fluidized bed (HPB) processes. The results showed that the HPB total nitrogen removal efficiency increased by 10.86 % more than CAS. The anammox pathway increased by 6.92 %, while the simultaneous nitrification-denitrification pathway increased by 4.27 %. Also, the effluent's total nitrogen of the HPB process was stabilized below 10 mg/L, which can withstand the impact of industrial wastewater better. More energy and substance (protein) were consumed to attach to the carriers and resist external selective pressure to produce extracellular polymeric substance rather than sludge production in the HPB process. For a 10,000 m/d HPB wastewater treatment plant, lowering the total nitrogen and sludge production saved $110,369.64 in annual operating costs.
本研究对全规模传统活性污泥（CAS）和高浓度粉末载体生物流化床（HPB）工艺进行了并列对比研究。结果表明，HPB 的总氮去除效率比 CAS 高 10.86%。其中氨氮转化途径增加了 6.92%，同时硝化-反硝化途径增加了 4.27%。此外，HPB 工艺出水的总氮稳定在 10mg/L 以下，能够更好地承受工业废水的冲击。在 HPB 工艺中，更多的能量和物质（蛋白质）被消耗用于附着在载体上，并抵抗外部选择压力，以产生胞外聚合物物质，而不是产生污泥。对于一个 10000m/d 的 HPB 污水处理厂，降低总氮和污泥产量可节省 110369.64 美元的年度运营成本。
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