title: Evaluating the toxicity of food processing wastes as co-digestion substrates with dairy manure.
abstract: Studies have shown that including food waste as a co-digestion substrate in the anaerobic digestion of livestock manure can increase energy production. However, the type and inclusion rate of food waste used for co-digestion need to be carefully considered in order to prevent adverse conditions in the digestion environment. This study determined the effect of increasing the concentration (2%, 5%, 15% and 30%, by volume) of four food-processing wastes (meatball, chicken, cranberry and ice cream processing wastes) on methane production. Anaerobic toxicity assay (ATA) and specific methanogenic activity (SMA) tests were conducted to determine the concentration at which each food waste became toxic to the digestion environment. Decreases in methane production were observed at concentrations above 5% for all four food waste substrates, with up to 99% decreases in methane production at 30% food processing wastes (by volume).
authors.affiliation: University of Maryland, Department of Environmental Science and Technology, University of Research Energy Research Center, 1445 Animal Science/Ag Engineering Blgd., College Park, MD 20742, USA.
authors.forename: Maria Sol
authors.initials: MS
authors.lastname: Lisboa
authors.affiliation: University of Maryland, Department of Environmental Science and Technology, University of Research Energy Research Center, 1445 Animal Science/Ag Engineering Blgd., College Park, MD 20742, USA. Electronic address: slansing@umd.edu.
authors.forename: Stephanie
authors.initials: S
authors.lastname: Lansing
mesh_terms: D000693:Anaerobiosis; D000818:Animals; D004785:Environmental Pollutants / Q000032:analysis / Q000633:toxicity*; D005504:Food Analysis; D005511:Food Handling; D058751:Livestock; D008372:Manure / Q000382:microbiology; D012037:Refuse Disposal / Q000379:methods*; D062611:Solid Waste / Q000032:analysis*
chemical_list: D004785:Environmental Pollutants; D008372:Manure; D062611:Solid Waste
keywords: Anaerobic digestion; Anaerobic toxicity assay (ATA); Biogas; Methane