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- W4313443345 abstract "Anammox is a promising biotechnology for nitrogen removal and gaining popularity in mainstream wastewater treatment. The efficient and low energy-consumed elimination of the intrinsic byproduct nitrate in anammox-mediated process is still a tough barrier and urgently demands resolving. To explore a newly green alternative for advanced nitrogen removal from domestic sewage, this study proposed a novel Integrated Anammox, Fermentation and Denitrification (IAFD) process. After 215-day operation, total inorganic nitrogen (TIN) removal efficiency markedly increased from 72.6% to 94.1% and effluent TIN dropped from 7.9 mg L−1 to 1.8 mg L−1 with influent TIN of 56 mg L−1. Through in-situ activated sludge fermentation, 37.341 mg COD·L−1·d−1 organics was yielded, causing a COD/NO3−-N of 8.9, Soluble protein (63.8%), polysaccharide (10.6%) and acetic acid (13.9%) were primary components. Candidatus_Brocadia (0.8%) and Candidatus_Competibacter (4.6%) were dominant functional bacteria, which contributed 81.1% and 18.9% to nitrogen elimination, respectively. Robust anammox (3.37 mg N·g VSS−1·h−1), fermentation-assisted denitrification and denitritation synergistically boosted N removal. The novel process required no external carbon, reduced 59.5% aeration and 35.8% external sludge. The novel process showed significantly environmental and economical advantages of low operation expenses and energy cost with no external carbon requirement, 59.5% aeration and 35.8% external sludge reduction. This work provided an energy-neutral and sustainable scheme for the advanced nitrogen removal of municipal wastewater and sludge disposal in WWTPs." @default.
- W4313443345 created "2023-01-06" @default.
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- W4313443345 date "2023-02-01" @default.
- W4313443345 modified "2023-10-18" @default.
- W4313443345 title "Low energy-consumed process of integrated anammox and in-situ fermentation-based denitrification for ultra-efficient nitrogen removal from mainstream domestic sewage" @default.
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- W4313443345 doi "https://doi.org/10.1016/j.jclepro.2022.135805" @default.
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