Achieving and control of partial denitrification in anoxic-oxic process of real municipal wastewater treatment plant
Achieving and control of partial denitrification in anoxic-oxic process of real municipal wastewater treatment plant
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真实城市污水处理厂缺氧-好氧过程部分反硝化的实现与控制
DOI：
10.1016/j.biortech.2021.125765
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发表时间：
2021
影响因子：
11.4
通讯作者：
Yaxin Wang
中科院分区：
文献类型：
--
作者：
Xiuhong Liu;Runyu Liu;Qing Yang;Bin Cui;Wenjun Wu;Xiaoyin Zhao;Yaxin Wang
部分反硝化是为厌氧氨氧化提供稳定亚硝酸盐的替代过程。本研究基于大规模和实验室规模的实验，在城市污水处理厂 (MWWTP) 中对部分反硝化的实现和控制以及微生物机制进行了为期 17 个月的研究。以葡萄糖（GLC）为唯一碳源，成功实现部分反硝化，亚硝酸盐积累百分比（NAP）高于90%；而以乙酸钠（NaAc）为唯一碳源，可有效控制亚硝酸盐积累，且碳利用经济高效。Candidatus Competibacter和Thaurea是部分反硝化的优势群落。 MWWTP中反硝化糖原积累生物(DGAOs)、Thauera、反硝化磷积累生物(DPAOs)、GAOs、PAOs和反硝化菌共存，部分反硝化过程中COD比去除率(CODSRR)为883.10~1188.92mgN/gMLVSS/h。通过将缺氧-好氧（A/O）操作调整为缺氧操作，可以限制GAO和PAO的生长。
Partial denitrification is an alternative process to provide stable nitrite for anammox. In this study, based on full-scale and lab-scale experiments, achieving and control of partial denitrification and the microbial mechanism were studied for 17 months in municipal wastewater treatment plant (MWWTP). Using glucose (GLC) as sole carbon source, partial denitrification was successfully achieved with nitrite accumulation percentage (NAP) higher than 90%; whereas, using sodium acetate (NaAc) as sole carbon source, nitrite accumulation was effectively controlled with economic and efficient carbon usage.Candidatus CompetibacterandThaureawere the dominant communities for partial denitrification. Denitrifying glycogen accumulating organisms (DGAOs),Thauera, denitrifying phosphorus accumulating organisms (DPAOs), GAOs, PAOs and denitrifiers coexisted in MWWTP, resulting in COD specific removal rate (CODSRR) of883.10 ~ 1188.92mgN/gMLVSS/h during partial denitrification. Through adjustment of Anoxic-Oxic (A/O) operation to anoxic operation, the growth of GAOs and PAOs could be limited.