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

Water Research
Di WuGuang-Hao Chen

Abstract

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 SO4(2-)/mg COD) in the saline sewage resulting from this practice has enabled us to develop the Sulfate reduction, Autotrophic denitrification and Nitrification Integrated (SANI(®)) process with minimal sludge production and oxygen demand. Recently, the SANI(®) process has been expanded to include Enhanced Biological Phosphorus Removal (EBPR) in an alternating anaerobic/limited-oxygen (LOS-EBPR) 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 °C and a high salinity of 20% seawater. A synergistic relationship may exist between sulfur cycle and biolog...Continue Reading

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Citations

Feb 14, 2016·Bioresource Technology·Cédric TarayreFrank Delvigne
Aug 3, 2014·Water Research·Tian-wei HaoGuang-Hao Chen
Nov 20, 2016·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Hongbo LiuStephan Kueppers
Feb 9, 2021·Applied Microbiology and Biotechnology·Norihisa MatsuuraKonstantinos T Konstantinidis
Dec 20, 2019·Water Research·Haoran DuanZhiguo Yuan
Mar 14, 2021·The Science of the Total Environment·Bo WuShanquan Wang
Jun 22, 2021·Journal of Environmental Health Science & Engineering·Mohammad AminzadehHassan Aminirad
Jun 28, 2019·Environmental Science & Technology·Akashdeep Singh OberoiHui Lu

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