title: Biotechnological conversion of agro-industrial wastewaters into biodegradable plastic, poly beta-hydroxybutyrate.
abstract: Waste activated sludge generated from a combined dairy and food processing industry wastewater treatment plant was evaluated for its potential to produce biodegradable plastic, poly beta-hydroxybutyric acid (PHB). Deproteinized jowar grain-based distillery spentwash yielded 42.3% PHB production (w/w), followed by filtered rice grain-based distillery spentwash (40% PHB) when used as substrates. Addition of di-ammonium hydrogen phosphate (DAHP) resulted in an increase in PHB production to 67% when raw rice grain-based spentwash was used. Same wastewater, after removal of suspended solids by filtration and with DAHP supplementation resulted in lower PHB production (57.9%). However, supplementing other wastes with DAHP led to a substantial decrease in PHB content in comparison to what was observed in the absence of DAHP.
authors.affiliation: Environmental Biotechnology Division, National Environmental Engineering Research Institute, Nehru Marg, Nagpur 440 020, India.
authors.forename: Anshuman A
authors.initials: AA
authors.lastname: Khardenavis
authors.forename: M
authors.initials: M
authors.lastname: Suresh Kumar
authors.forename: Sandeep N
authors.initials: SN
authors.lastname: Mudliar
authors.forename: Tapan
authors.initials: T
authors.lastname: Chakrabarti
mesh_terms: D000383:Agriculture; D003247:Conservation of Natural Resources; D019649:Food Industry; D006885:Hydroxybutyrates / Q000737:chemistry*; D007220:Industrial Waste; D012275:Oryza / Q000737:chemistry; D010969:Plastics; D011091:Polyesters / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D014865:Waste Disposal, Fluid / Q000379:methods*; D000094122:Polyhydroxybutyrates
chemical_list: D006885:Hydroxybutyrates; D007220:Industrial Waste; D010969:Plastics; D011091:Polyesters; C003182:poly-beta-hydroxybutyrate; D000094122:Polyhydroxybutyrates