Effective partial denitrification of biological effluent of landfill leachate for Anammox process: Start-up, influencing factors and stable operation
Effective partial denitrification of biological effluent of landfill leachate for Anammox process: Start-up, influencing factors and stable operation
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厌氧氨氧化工艺垃圾渗滤液生物出水的有效部分反硝化：启动、影响因素及稳定运行
DOI：
10.1016/j.scitotenv.2021.150975
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发表时间：
2022
影响因子：
9.8
通讯作者：
Lin H.
中科院分区：
文献类型：
--
作者：
Li Y.;Zhang W.;Dai Y.;Su X.;Xiao Y.;Wu D.;Sun F.;Mei R.;Chen J.;Lin H.
部分反硝化与厌氧氨氧化联用是一种很有前途的同时去除废水中氨氮和硝酸盐的方法。研究了部分反硝化工艺处理垃圾渗滤液生化出水的启动、影响因素及稳定运行。在部分反硝化工艺中获得了较高的硝酸盐负荷（3.85 kg N m−3d−1）和较短的水力停留时间（0.66 h），从而为下游厌氧氨氧化工艺提供了合适的出水NO2−-N/NH 4 +-N比例。该研究还揭示了碳源、COD/NO3−-N比值和盐度在部分反硝化中的重要性。乙酸盐型碳源、COD/NO3−-N约为3.0、盐度低于1%有利于高效部分反硝化。来自高效部分反硝化污泥的内源碳源有助于该工艺的低COD消耗。在部分反硝化过程中，优势菌群Thauera得到富集，并随着有机物去除率的增加向假单胞菌群转移。
Partial denitrification combined with Anammox is a promising approach for simultaneous removal of ammonium and nitrate from wastewaters. In this study, the start-up, influencing factors and stable operation of partial denitrification for treating biological effluent from landfill leachate were investigated. High nitrate loads (3.85 kg N m−3d−1) and short hydraulic retention time (0.66 h) were obtained in the partial denitrification process, yielding a suitable ratio of NO2−-N/NH4+-N in the effluent for downstream Anammox process. The study also revealed the importance of carbon sources, COD/NO3−-N ratio and salinity in the partial denitrification. Acetate-type carbon source, COD/NO3−-N ratio of about 3.0 and salinity lower than 1% favored high-efficient partial denitrification. The endogenous carbon sources from high-rate partial denitrification sludge contributed to low COD consumption in the process. During the partial denitrification, the dominant genus ofThauerawas enriched, and shifted toPseudomonaswith the increase of organic removal rates.