Biotechnological conversion of agro-industrial wastewaters into biodegradable plastic, poly beta-hydroxybutyrate.
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.
Khardenavis
Anshuman A
AA
Environmental Biotechnology Division, National Environmental Engineering Research Institute, Nehru Marg, Nagpur 440 020, India.
Suresh Kumar
M
M
Mudliar
Sandeep N
SN
Chakrabarti
Tapan
T
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
D006885:Hydroxybutyrates; D007220:Industrial Waste; D010969:Plastics; D011091:Polyesters; C003182:poly-beta-hydroxybutyrate; D000094122:Polyhydroxybutyrates