title: Effect of temperature on intracellular phosphorus absorption and extra-cellular phosphorus removal in EBPR process.
abstract: 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.
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment, No. 73 Huanghe Road, Nangang District, Harbin 150090, PR China.
authors.forename: Nan
authors.initials: N
authors.lastname: Li
authors.forename: Nan-Qi
authors.initials: NQ
authors.lastname: Ren
authors.forename: Xiu-Heng
authors.initials: XH
authors.lastname: Wang
authors.forename: Han
authors.initials: H
authors.lastname: Kang
mesh_terms: 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*
chemical_list: D012722:Sewage; D014874:Water Pollutants, Chemical; D010758:Phosphorus