title: Effect of leachate recirculation on mesophilic anaerobic digestion of food waste.
abstract: The effects of using untreated leachate for supplemental water addition and liquid recirculation on anaerobic digestion of food waste was evaluated by combining cyclic water recycle operations with batch mesophilic biochemical methane potential (BMP) assays. Cyclic BMP assays indicated that using an appropriate fraction of recycled leachate and fresh make up water can stimulate methanogenic activity and enhance biogas production. Conversely increasing the percentage of recycled leachate in the make up water eventually causes methanogenic inhibition and decrease in the rate of food waste stabilization. The decrease in activity is exacerbated as the number cycles increases. Inhibition is possibly attributed to accumulation and elevated concentrations of ammonia as well as other waste by products in the recycled leachate that inhibit methanogenesis.
authors.affiliation: Department of Civil Engineering, University of Ottawa, 161 Louis Pasteur St., P.O. Box 450, Stn. A, Ottawa, ON, Canada. HSHAH045@uottawa.ca
authors.forename: Haleh
authors.initials: H
authors.lastname: Shahriari
authors.forename: Mostafa
authors.initials: M
authors.lastname: Warith
authors.forename: Mohamed
authors.initials: M
authors.lastname: Hamoda
authors.forename: Kevin J
authors.initials: KJ
authors.lastname: Kennedy
mesh_terms: D000693:Anaerobiosis; D056804:Biofuels; D019149:Bioreactors; D005735:Garbage
chemical_list: D056804:Biofuels