Henan Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, School of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China.
Henan Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, School of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China.
Bioresour Technol. 2022 Feb;346:126610. doi: 10.1016/j.biortech.2021.126610. Epub 2021 Dec 23.
Polycyclic aromatic hydrocarbons (PAHs) have led to failure of waste water treatment plant operations. In this study, a two-sludge system was used to solve this problem of simultaneously removing phosphorus, nitrogen, and PAHs. The results showed that increasing the maximum PAHs concentration to 15 mg/L did not have any negative effect on the removal rates of total nitrogen (79.68%) and chemical oxygen demand (75.94%); however, the phosphorus removal efficiency decreased to 61.16%. The system exhibited a stronger degradation ability for phenanthrene. Thauera, Hydrogenophaga, and Hyphomicrobium were enriched, which resulted in good denitrification, and contributed to PAHs removal. PAHs mixture promoted PAHs functional genes but restrained denitrification functional genes. However, single naphthalene enhanced denitrification functional genes, which confirmed the feasibility of denitrification coupled with PAHs degradation. In conclusion, for the removal of pollutants from sewage treatment, nitrogen and phosphorus removal coupled with PAHs could be maintained by selecting a two-sludge system.
多环芳烃（PAHs）已导致废水处理厂运行失败。在这项研究中，采用双污泥系统来解决同时去除磷、氮和 PAHs 的问题。结果表明，将最大 PAHs 浓度增加到 15mg/L 对总氮（79.68%）和化学需氧量（75.94%）的去除率没有任何负面影响，但是磷去除效率下降至 61.16%。该系统对菲具有更强的降解能力。陶厄氏菌属、氢噬胞菌属和细枝菌属得到了富集，从而实现了良好的反硝化作用，并有助于 PAHs 的去除。多环芳烃混合物促进了 PAHs 功能基因，但抑制了反硝化功能基因。然而，单一的萘增强了反硝化功能基因，这证实了反硝化与 PAHs 降解偶联的可行性。总之，对于污水处理中的污染物去除，可以通过选择双污泥系统来维持氮磷去除与 PAHs 的去除。
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