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Effects of Potassium and Magnesium in the Enhanced Biological Phosphorus Removal Process Using a Membrane Bioreactor
This study assessed the role of potassium (K+), magnesium (Mg2+), and calcium (Ca2+) ions in the enhanced biological phosphorus removal (EBPR) from wastewaters using a membrane bioreactor (MBR). A linear relationship in the anaerobic and aerobic/anoxic phases for Puptake versus Prelease was obtained using the known equation ΔPuptake = a × ΔPrelease+ b, where the constants “a” and “b” were found to be 0.44 and 8.40, respectively. Both potassium and magnesium were soluble with phosphate in the anaerobic phase, but they accumulated again during the successive aerobic/anoxic phase. The linear correlation coefficients (R2) of K+/PO4‐P and Mg2+/PO4‐P were calculated as 0.6682 and 0.8884, respectively. The molar ratio of CK/P during anaerobic phosphorus release was observed to be 0.20 mol/mol, whereas CMg/P was 0.21 mol/mol. Furthermore, unlike potassium and magnesium, calcium was not co‐transported with phosphorus during the release and uptake processes.
Effects of Potassium and Magnesium in the Enhanced Biological Phosphorus Removal Process Using a Membrane Bioreactor
This study assessed the role of potassium (K+), magnesium (Mg2+), and calcium (Ca2+) ions in the enhanced biological phosphorus removal (EBPR) from wastewaters using a membrane bioreactor (MBR). A linear relationship in the anaerobic and aerobic/anoxic phases for Puptake versus Prelease was obtained using the known equation ΔPuptake = a × ΔPrelease+ b, where the constants “a” and “b” were found to be 0.44 and 8.40, respectively. Both potassium and magnesium were soluble with phosphate in the anaerobic phase, but they accumulated again during the successive aerobic/anoxic phase. The linear correlation coefficients (R2) of K+/PO4‐P and Mg2+/PO4‐P were calculated as 0.6682 and 0.8884, respectively. The molar ratio of CK/P during anaerobic phosphorus release was observed to be 0.20 mol/mol, whereas CMg/P was 0.21 mol/mol. Furthermore, unlike potassium and magnesium, calcium was not co‐transported with phosphorus during the release and uptake processes.
Effects of Potassium and Magnesium in the Enhanced Biological Phosphorus Removal Process Using a Membrane Bioreactor
Choi, Hee‐Jeong (author) / Yu, Sung‐Whan (author) / Lee, Seung‐Mok (author) / Yu, Seung‐Young (author)
Water Environment Research ; 83 ; 613-621
2011-07-01
9 pages
Article (Journal)
Electronic Resource
English
Membrane bioreactors configurations for enhanced biological phosphorus removal
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