title: Synthesis of PHAs from waster under various C:N ratios.
abstract: Polyhydroxyalkanoates (PHAs) production was carried out under various C:N ratios. A ratio of 100 resulted best polymer yield. C-source was an important factor in synthesis. For example, as the ratio of valeric acid (C5) to butyric acid (C4) in N-free medium was increased, the mole fraction of HV in the copolymer increased. When soy waste was used as a C-source a copolymer, a high HV mole fraction (HB:HV, 75:25) was produced while when malt waste was used, a much lower HV mole fraction (HB:HV, 90:10) was generated. It was concluded that activated sludge bacteria could be induced to produce PHAs using food wastes as C-sources and this could be the basis for production of biodegradable plastics.
authors.affiliation: Department of Civil and Structural Engineering, The Hong Kong Polytechnic University, Hong Kong, PR China.
authors.forename: Y J
authors.initials: YJ
authors.lastname: Wang
authors.forename: F L
authors.initials: FL
authors.lastname: Hua
authors.forename: Y F
authors.initials: YF
authors.lastname: Tsang
authors.forename: S Y
authors.initials: SY
authors.lastname: Chan
authors.forename: S N
authors.initials: SN
authors.lastname: Sin
authors.forename: H
authors.initials: H
authors.lastname: Chua
authors.forename: P H F
authors.initials: PH
authors.lastname: Yu
authors.forename: N Q
authors.initials: NQ
authors.lastname: Ren
mesh_terms: D000421:Alcaligenes / Q000378:metabolism* / Q000502:physiology; D019149:Bioreactors; D053898:Biosynthetic Pathways / Q000502:physiology; D002244:Carbon / Q000378:metabolism; D002849:Chromatography, Gas; D005285:Fermentation; D006723:Hong Kong; D009584:Nitrogen / Q000378:metabolism; D011108:Polymers / Q000378:metabolism*; D012037:Refuse Disposal / Q000379:methods*
chemical_list: D011108:Polymers; C111948:poly(hydroxyethanoate); D002244:Carbon; D009584:Nitrogen