Simultaneous nitrogen and phosphorus removal in the sulfur cycle-associated Enhanced Biological Phosphorus Removal (EBPR) process

WATER RESEARCH

卷:49

Article

Wu, Di¹  Ekama, George A.²  Wang, Hai-Guang¹  Wei, Li¹  Lu, Hui³  Chui, Ho-Kwong¹  Liu, Wen-Tso⁴  Brdjanovic, Damir⁵  van Loosdrecht, Mark C. M.^6,7  Chen, Guang-Hao^1,8 

[1] Hong Kong Univ Sci & Technol, Dept Civil & Environm Engn, Hong Kong, Hong Kong, Peoples R China

[2] Univ Cape Town, Dept Civil Engn, Water Res Grp, ZA-7700 Rondebosch, South Africa

[3] Sun Yat Sen Univ, Sch Environm Sci & Engn, Guangzhou 510275, Guangdong, Peoples R China

[4] Univ Illinois, Dept Civil & Environm Engn, Urbana, IL USA

[5] UNESCO IHE Inst Water Educ, Dept Environm Engn & Water Technol, Delft, Netherlands

[6] Delft Univ Technol, Dept Biotechnol, Delft, Netherlands

[7] KWR Watercycle Res, Nieuwegein, Netherlands

[8] Sun Yat Sen Univ, SYSU HKUST Joint Res Ctr Innovat Environm Technol, Guangzhou 510275, Guangdong, Peoples R China

关键词: Sulfur cycle;    Enhanced biological phosphorus removal;    Denitrification;    Saline sewage;    Warm temperature;   

DOI  :  10.1016/j.watres.2013.11.029

来源: Elsevier

【 摘 要 】

Hong Kong has practiced seawater toilet flushing since 1958, saving 750,000 m(3) of freshwater every day. A high sulfate-to-COD ratio (>1.25 mg SO/mg COD) in the saline sewage resulting from this practice has enabled us to develop the Sulfate reduction, Autotrophic denitrification and Nitrification Integrated (SANI (R)) process with minimal sludge production and oxygen demand. Recently, the SANI (R) process has been expanded to include Enhanced Biological Phosphorus Removal (EBPR) in an alternating anaerobic/limited-oxygen (LOSEBPR) aerobic sequencing batch reactor (SBR). This paper presents further development - an anaerobic/anoxic denitrifying sulfur cycle-associated EBPR, named as DS-EBPR, bioprocess in an alternating anaerobic/anoxic SBR for simultaneous removal of organics, nitrogen and phosphorus. The 211 day SBR operation confirmed the sulfur cycle-associated biological phosphorus uptake utilizing nitrate as electron acceptor. This new bioprocess cannot only reduce operation time but also enhance volumetric loading of SBR compared with the LOS-EBPR. The DS-EBPR process performed well at high temperatures of 30 degrees C and a high salinity of 20% seawater. A synergistic relationship may exist between sulfur cycle and biological phosphorus removal as the optimal ratio of P-release to SO-reduction is close to 1.0 mg P/mg S. There were no conventional PAOs in the sludge. (C) 2013 Elsevier Ltd. All rights reserved.

【 授权许可】

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