title: Solid-state anaerobic co-digestion of spent mushroom substrate with yard trimmings and wheat straw for biogas production.
abstract: Spent mushroom substrate (SMS) is a biomass waste generated from mushroom production. About 5 kg of SMS is generated for every kg of mushroom produced. In this study, solid state anaerobic digestion (SS-AD) of SMS, wheat straw, yard trimmings, and their mixtures was investigated at different feedstock to effluent ratios. SMS was found to be highly degradable, which resulted in inhibition of SS-AD due to volatile fatty acid (VFA) accumulation and a decrease in pH. This issue was addressed by co-digestion of SMS with either yard trimmings or wheat straw. SS-AD of SMS/yard trimmings achieved a cumulative methane yield of 194 L/kg VS, which was 16 and 2 times higher than that from SMS and yard trimmings, respectively. SS-AD of SMS/wheat straw obtained a cumulative methane yield of 269 L/kg VS, which was 23 times as high as that from SMS and comparable to that from wheat straw.
authors.affiliation: Department of Food, Agricultural, and Biological Engineering, The Ohio State University/Ohio Agricultural Research and Development Center, 1680 Madison Ave., Wooster, OH 44691-4096, USA; College of Natural Resources and Environment, South China Agricultural University, Guangzhou, Guangdong 510640, China.
authors.forename: Yunqin
authors.initials: Y
authors.lastname: Lin
authors.affiliation: Department of Food, Agricultural, and Biological Engineering, The Ohio State University/Ohio Agricultural Research and Development Center, 1680 Madison Ave., Wooster, OH 44691-4096, USA.
authors.forename: Xumeng
authors.initials: X
authors.lastname: Ge
authors.affiliation: Department of Food, Agricultural, and Biological Engineering, The Ohio State University/Ohio Agricultural Research and Development Center, 1680 Madison Ave., Wooster, OH 44691-4096, USA. Electronic address: li.851@osu.edu.
authors.forename: Yebo
authors.initials: Y
authors.lastname: Li
mesh_terms: D000363:Agaricales / Q000737:chemistry*; D000468:Alkalies / Q000737:chemistry; D000693:Anaerobiosis; D001673:Biodegradation, Environmental; D056804:Biofuels; D001709:Biotechnology / Q000379:methods*; D002482:Cellulose / Q000737:chemistry; D005232:Fatty Acids, Volatile / Q000096:biosynthesis; D006863:Hydrogen-Ion Concentration; D006868:Hydrolysis; D008697:Methane / Q000096:biosynthesis; D018515:Plant Leaves / Q000737:chemistry*; D011134:Polysaccharides / Q000737:chemistry; D012037:Refuse Disposal / Q000379:methods*; D014908:Triticum / Q000737:chemistry*; D014866:Waste Products / Q000032:analysis
chemical_list: D000468:Alkalies; D056804:Biofuels; D005232:Fatty Acids, Volatile; D011134:Polysaccharides; D014866:Waste Products; C007916:hemicellulose; D002482:Cellulose; D008697:Methane
keywords: Biogas; Solid-state anaerobic digestion; Spent mushroom substrate; Wheat straw; Yard trimmings