title: Effect of different carbon sources on the biological phosphorus removal by a sequencing batch reactor using pressurized pure oxygen.
abstract: The effect of different carbon source on the efficiency of enhanced biological phosphorus removal (EBPR) from synthetic wastewater with acetate and two ratios of acetate/starch as a carbon source was investigated. Three pressurized pure oxygen sequencing batch reactor (POSBR) experiments were operated. The reactors (POSBR1, POSBR2 and POSBR3) were developed and studied at different carbon source ratios of 100% acetate, 75% acetate plus 25% starch and 50% acetate plus 50% starch, respectively. The results showed that POSBR1 had a higher phosphate release-to-uptake ratio and, respectively, in a much higher phosphorus removal efficiency (93.8%) than POSBR2 (84.7%) and POSBR3 (77.3%) within 30 days of operation. This indicated that the phosphorus removal efficiency decreased the higher the starch concentration was. It was also found that POSBR1 produced more polyhydroxyalkanoates (PHAs) than the other reactors. Based on the effect of the carbon source on the PHA concentration and consumption, the conditions of POSBR1 were favourable for the growth of polyphosphate-accumulating organisms and therefore, beneficial for the biological phosphorus removal process.
authors.affiliation: Graduate School of Science and Engineering, Division of Environmental Science and Engineering, Yamaguchi University , Yamaguchi , Japan.
authors.forename: Jie
authors.initials: J
authors.lastname: Wei
authors.affiliation: Graduate School of Science and Engineering, Division of Environmental Science and Engineering, Yamaguchi University , Yamaguchi , Japan.
authors.forename: Tsuyoshi
authors.initials: T
authors.lastname: Imai
authors.affiliation: Graduate School of Science and Engineering, Division of Environmental Science and Engineering, Yamaguchi University , Yamaguchi , Japan.
authors.forename: Takaya
authors.initials: T
authors.lastname: Higuchi
authors.affiliation: Graduate School of Science and Engineering, Division of Environmental Science and Engineering, Yamaguchi University , Yamaguchi , Japan ; Faculty of Agrotechnology, Malang Islamic University , Malang , Indonesia.
authors.forename: Novi
authors.initials: N
authors.lastname: Arfarita
authors.affiliation: Systems Design and Engineering, Graduate School of Science and Engineering, Yamaguchi University , Yamaguchi , Japan.
authors.forename: Koichi
authors.initials: K
authors.lastname: Yamamoto
authors.affiliation: Systems Design and Engineering, Graduate School of Science and Engineering, Yamaguchi University , Yamaguchi , Japan.
authors.forename: Masahiko
authors.initials: M
authors.lastname: Sekine
authors.affiliation: Systems Design and Engineering, Graduate School of Science and Engineering, Yamaguchi University , Yamaguchi , Japan.
authors.forename: Ariyo
authors.initials: A
authors.lastname: Kanno
keywords: biological phosphorus removal; carbon source; polyphosphate-accumulating organisms (PAOs); pressurized pure oxygen sequencing batch reactor (POSBR)