title: Batch anaerobic co-digestion of proteins and carbohydrates.
abstract: Batch anaerobic studies were conducted using five mixtures (M1-M5) of bovine serum albumin (BSA) and starch. The results showed that co-digestion of BSA and starch had a positive impact on the methane production. The highest methane production of 288 mL, the highest methane yield of 360 mL CH(4)/g COD(added), and the highest maximum methane production rate of 62 mL CH(4)/d were achieved for M4 (20% BSA and 80% starch). Most of the particulate proteins (90%) as well as particulate carbohydrates (95%) were degraded in the first 3 days. The hydrolysis coefficients of particulate proteins and particulate carbohydrates ranged from 0.65 to 1.01 d(-1) and from 0.53 to 1.06 d(-1), respectively. The highest methane production was achieved at C:N ratio of 12.8 for M4. For BSA only, propionic acid was the main volatile fatty acid (VFA), while for the starch only, butyric acid was the predominant VFA.
authors.affiliation: Department of Chemical and Biochemical Engineering, University of Western Ontario, London, Ontario, Canada N6A 5B9. sayedbesh@yahoo.com
authors.forename: Elsayed
authors.initials: E
authors.lastname: Elbeshbishy
authors.forename: George
authors.initials: G
authors.lastname: Nakhla
mesh_terms: D000641:Ammonia / Q000032:analysis; D000693:Anaerobiosis; D000818:Animals; D061249:Batch Cell Culture Techniques / Q000379:methods*; D001673:Biodegradation, Environmental; D002417:Cattle; D005232:Fatty Acids, Volatile / Q000032:analysis; D006863:Hydrogen-Ion Concentration; D008697:Methane / Q000096:biosynthesis; D008954:Models, Biological; D012710:Serum Albumin, Bovine / Q000378:metabolism*; D012995:Solubility; D013213:Starch / Q000378:metabolism*; D013379:Substrate Specificity
chemical_list: D005232:Fatty Acids, Volatile; D012710:Serum Albumin, Bovine; D000641:Ammonia; D013213:Starch; D008697:Methane