title: Impact of organic loading rate on the performance of psychrophilic dry anaerobic digestion of dairy manure and wheat straw: long-term operation.
abstract: Development of efficient processes for valorising animal wastes would be a major advancement in cold-climate regions. This paper reports the results of long term (315 days experiment) of novel psychrophilic (20°C) dry anaerobic digestion (PDAD) of cow feces and wheat straw in laboratory scale sequence batch reactor operated at increasing organic loading rate. The PDAD process fed with a mixture of feces and straw (TS of 27%) over a treatment cycle length of 21 days at organic loading rate (OLR) 4.0, 5.0 and 6.0 g TCOD kg(-1) inoculum d(-1) (of 2.9 ± 0.1, 3.7 ± 0.1, and 4.4 ± 0.1g VS kg(-1) inoculum d(-1), respectively) resulted in average specific methane yield (SMY) of 187.3 ± 18.1, 163.6 ± 39.5, 150.8 ± 32.9 N L CH4 kg(-1)VS fed, respectively. PDAD of cow feces and wheat straw is possible with VS-based inoculum-to-substrate ratio of 1.4 at OLR of 6.0 g TCOD kg(-1) inoculum d(-1). Hydrolysis was the limiting step reaction.
authors: Dairy and Swine Research and Development Centre, Agriculture and Agri-Food Canada, Sherbrooke, Quebec J1M 0C8, Canada.
authors: Noori M Cata
authors: NMC
authors: Saady
authors: Dairy and Swine Research and Development Centre, Agriculture and Agri-Food Canada, Sherbrooke, Quebec J1M 0C8, Canada. Electronic address: Daniel.masse@agr.gc.ca.
authors: Daniel I
authors: DI
authors: Massé
mesh_terms: D000693:Anaerobiosis; D000818:Animals; D056804:Biofuels; D002417:Cattle; D005232:Fatty Acids, Volatile / Q000378:metabolism; D005243:Feces; D005260:Female; D006868:Hydrolysis; D008372:Manure; D008697:Methane / Q000378:metabolism; D012037:Refuse Disposal / Q000379:methods*; D014908:Triticum
chemical_list: D056804:Biofuels; D005232:Fatty Acids, Volatile; D008372:Manure; D008697:Methane
keywords: Anaerobic digestion; Cow manure; Dry; High rate; Psychrophilic