Advanced nitrogen and phosphorus removal from municipal wastewater via simultaneous enhanced biological phosphorus remov
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RESEARCH PAPER
Advanced nitrogen and phosphorus removal from municipal wastewater via simultaneous enhanced biological phosphorus removal and semi‑nitritation (EBPR‑SN) combined with anammox Chuansheng Yuan1 · Yongzhen Peng1 · Jiantao Ji1 · Bo Wang1 · Xiyao Li1 · Qiong Zhang1 Received: 4 January 2020 / Accepted: 13 June 2020 © Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract In this study, a novel laboratory-scale synchronous enhanced biological phosphorus removal and semi-nitritation (termed as EBPR-SN) combined with anammox process was put forward for achieving nutrient elimination from municipal wastewater at 27 ℃. This process consisted of two 10 L sequencing batch reactors (SBRs), i.e. EBPR-SN SBR followed by Anammox SBR. The EBPR-SN SBR was operated for 400 days with five periods and the Anammox SBR was operated starting on period IV. Eventually, for treating municipal wastewater containing low chemical oxygen demand/nitrogen (COD/N) of 3.2 (mg/ mg), the EBPR-SN plus Anammox system performed advanced total inorganic nitrogen (TIN) and P removal, with TIN and P removal efficiencies of 81.4% and 94.3%, respectively. Further analysis suggested that the contributions of simultaneous partial nitrification denitrification, denitrification, and anammox to TIN removal were 15.0%, 45.0%, and 40.0%, respectively. The enriched phosphorus-accumulating organisms (PAOs) in the EBPR-SN SBR facilitated P removal. Besides, the EBPR-SN SBR achieved P removal and provided stable anammox substrates, suggesting a short sludge retention time (SRT 12 d) could achieve synergy between ammonia-oxidizing bacteria and PAOs. These results provided an alternative process for treating municipal wastewater with limited organics.
Electronic supplementary material The online version of this article (https://doi.org/10.1007/s00449-020-02392-8) contains supplementary material, which is available to authorized users. * Yongzhen Peng [email protected] 1
National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse TechnologyEngineering Research Center of Beijing, Beijing University of Technology, No.100, Ping Le Yuan, Chao Yang District, Beijing 100124, China
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Bioprocess and Biosystems Engineering
Graphic abstract
Keywords EBPR · Nitritation · Anammox · Low COD/n ratio · Municipal wastewater Abbreviations AOB Ammonia-oxidizing bacteria C/N Carbon/nitrogen COD Chemical oxygen demand DN Denitrification DO Dissolved oxygen EBPR-SN Enhanced biological phosphorus removal and semi-nitritation FNA Free nitrite acid GAOs Glycogen-accumulating organisms Gly Glycogen MLSS Mixed liquor suspended solids N Nitrogen NAR Nitrite accumulation ratio NOB Nitrite-oxidizing bacteria OHO Ordinary heterotrophic organisms P Phosphorus PAOs Phosphorus-accumulating organisms PHAs Polyhydroxyalkanoates PHB Poly-b-hydroxybutyrate PHV Poly-b-hydroxyvalerate PRA Phosphorus release amount PUA Phosphorus uptake amount SBR Sequencing batch reactor
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SPND Simultaneous part
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