Effect of temperature on intracellular phosphorus absorption and extra-cellular phosphorus removal in EBPR process.
This study investigated the temperature influence on intracellular absorption and extra-cellular phosphorus removal by extra-cellular polymeric substance (EPS) in enhanced biological phosphorus removal (EBPR) process. Three sequencing batch reactors (SBRs) were operated in anaerobic/aerobic sequence at 5.0, 15.0 and 25.0 degrees C. Phosphorus removed by intracellular absorption was demonstrated as the dominant part (>80%) in total phosphorus removal operated under different temperatures and the highest total phosphorus removal rate of 95% was obtained due to the highest intracellular phosphorus absorption of 18.2mg P in a typical cycle at 15.0 degrees C. Phosphorus removed by EPS removal achieved the highest value at 5.0 degrees C (2.4 mg P/cycle), which resulted in a higher total phosphorus removal rate at 5.0 degrees C (90%) than that at 25.0 degrees C (83%). Low temperature was propitious to EPS phosphorus removal, accounting for 13% of total phosphorus removal at 5.0 degrees C, which could be mainly due to magnesium phosphate precipitation.
Li
Nan
N
State Key Laboratory of Urban Water Resource and Environment, No. 73 Huanghe Road, Nangang District, Harbin 150090, PR China.
Ren
Nan-Qi
NQ
Wang
Xiu-Heng
XH
Kang
Han
H
D019149:Bioreactors / Q000382:microbiology*; D006358:Hot Temperature; D010758:Phosphorus / Q000737:chemistry / Q000302:isolation & purification* / Q000378:metabolism*; D012722:Sewage / Q000382:microbiology*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification / Q000378:metabolism*; D018508:Water Purification / Q000379:methods*
D012722:Sewage; D014874:Water Pollutants, Chemical; D010758:Phosphorus