title: Evaluating and modeling biogas production from municipal fat, oil, and grease and synthetic kitchen waste in anaerobic co-digestions.
abstract: The feasibility of using synthetic kitchen waste (KW) and fat, oil, and grease (FOG) as co-substrates in the anaerobic digestion of waste activated sludge (WAS) was investigated using two series of biochemical methane potential (BMP) tests. Ranges of ideal substrate to inoculum (S/I) ratio were determined for the FOG (0.25-0.75) and KW (0.80-1.26) as single substrates in the first experiment. The second experiment, which estimated the methane production performances of FOG and KW as co-substrates for WAS co-digestion, was conducted based on the optimal parameters selected from the results of the first experiment. Results indicated that co-digestions with FOG and KW enhanced methane production from 117±2.02 mL/gTVS (with only WAS) to 418±13.7 mL/gTVS and 324±4.11 mL/gTVS, respectively. FOG exhibited more biogas production than KW as co-substrate. Non-linear regression results showed that co-substrate addition shortened the lag phases of organic biodegradation from 81.8 (with only WAS) to 28.3 h with FOG and 3.90 h with KW.
authors.affiliation: Department of Civil Engineering, Queen's University, Kingston, ON, Canada K7L 3N6.
authors.forename: Chenxi
authors.initials: C
authors.lastname: Li
authors.forename: Pascale
authors.initials: P
authors.lastname: Champagne
authors.forename: Bruce C
authors.initials: BC
authors.lastname: Anderson
mesh_terms: D000693:Anaerobiosis; D056804:Biofuels; D003296:Cooking; D005223:Fats / Q000378:metabolism*; D005240:Feasibility Studies; D008962:Models, Theoretical; D009821:Oils / Q000378:metabolism*; D012037:Refuse Disposal
chemical_list: D056804:Biofuels; D005223:Fats; D009821:Oils