title: Breakdown of food waste by anaerobic fermentation and non-oxygen producing photosynthesis using a photosynthetic bacterium.
abstract: Large volumes of food waste are produced by restaurants, hotels, etc generating problems in its collection, processing and disposal. Disposal as garbage increases the organic matter in landfills and leachates. The photosynthetic bacterium Rhodopseudomonas palustris (CGA 009) easily broke down food waste. R. palustris produces H2 under anaerobic conditions and digests a very wide range of organic compounds. R. palustris reduced BOD by ≈70% and COD by ≈33%, starch, ammonia, nitrate, was removed but had little effect on reducing sugar or the total phosphorus, lipid, protein, total solid in a 7-day incubation. R. palustris produced a maximum of 80ml H2/g COD/day. A two-stage anaerobic digestion using yeast as the first stage, followed by a R. palustris digestion was tested but production of H2 was low.
authors.affiliation: Faculty of Technology and Environment, Prince of Songkla University, Phuket Campus, Kathu, Phuket 83120, Thailand.
authors.forename: N
authors.initials: N
authors.lastname: Mekjinda
authors.affiliation: Faculty of Technology and Environment, Prince of Songkla University, Phuket Campus, Kathu, Phuket 83120, Thailand. Electronic address: raymond.r@phuket.psu.ac.th.
authors.forename: R J
authors.initials: RJ
authors.lastname: Ritchie
mesh_terms: D000641:Ammonia / Q000378:metabolism; D000693:Anaerobiosis; D057919:Biological Oxygen Demand Analysis; D005285:Fermentation; D005502:Food; D005735:Garbage; D006859:Hydrogen / Q000378:metabolism; D009584:Nitrogen / Q000378:metabolism; D010758:Phosphorus / Q000378:metabolism; D010788:Photosynthesis; D012241:Rhodopseudomonas / Q000378:metabolism*; D012441:Saccharomyces cerevisiae / Q000378:metabolism; D013213:Starch / Q000378:metabolism; D018505:Waste Management / Q000295:instrumentation / Q000379:methods*
chemical_list: D010758:Phosphorus; D000641:Ammonia; D006859:Hydrogen; D013213:Starch; D009584:Nitrogen
keywords: Food waste; Hydrogen; Photosynthesis; Photosynthetic bacteria; Rhodopseudomonas palustris