title: Pilot plant experience on anaerobic codigestion of source selected OFMSW and sewage sludge.
abstract: Anaerobic codigestion of source selected organic fraction of municipal solid waste (SS-OFMSW) and sewage sludge may be one of the most viable solutions to optimize oversized digesters efficiency in wastewater treatment plants. Based on results of BMP tests obtained for sewage sludge and SS-OFMSW, pilot plant tests were carried out by 3.4 m(3) CSTR reactor at mesophilic temperature. A mix of fruit and vegetable waste from wholesale market and canteen waste was used as SS-OFMSW substrate. Tests were conducted applying an OLR (organic loading rate) ramp with 6 different phases until a value of 3.2 kgVS/m(3) d. Feedstock and digestate characteristics, efficiency and process parameters were monitored. The anaerobic codigestion development was stable in each phase: early indicators like VFA (volatile fatty acids) and FOS/TAC ratio were always below instability threshold values. The maximum OLR tested determined a GPR (gas production rate) of 0.95 N m(3)/m(3) d and SGP (specific gas production) of 0.49 N m(3)/kgVS with a VS abatement of 67.3%.
authors.affiliation: Department of Chemistry, Physics and Environment, University of Udine, via del Cotonificio 108, 33100 Udine, Italy. Electronic address: valentina.cabbai@uniud.it.
authors.forename: Valentina
authors.initials: V
authors.lastname: Cabbai
authors.affiliation: CAFC spa, viale Palmanova 192, 33100 Udine, Italy.
authors.forename: Nicola
authors.initials: N
authors.lastname: De Bortoli
authors.affiliation: Department of Chemistry, Physics and Environment, University of Udine, via del Cotonificio 108, 33100 Udine, Italy.
authors.forename: Daniele
authors.initials: D
authors.lastname: Goi
mesh_terms: D000641:Ammonia / Q000378:metabolism; D000693:Anaerobiosis; D056804:Biofuels; D057919:Biological Oxygen Demand Analysis; D019149:Bioreactors; D002244:Carbon / Q000378:metabolism; D005638:Fruit; D007558:Italy; D019216:Metals, Heavy / Q000032:analysis; D009584:Nitrogen / Q000378:metabolism; D010865:Pilot Projects; D012037:Refuse Disposal / Q000295:instrumentation / Q000379:methods*; D012722:Sewage; D062611:Solid Waste; D013696:Temperature; D014675:Vegetables
chemical_list: D056804:Biofuels; D019216:Metals, Heavy; D012722:Sewage; D062611:Solid Waste; D002244:Carbon; D000641:Ammonia; D009584:Nitrogen
keywords: Anaerobic codigestion; OFMSW; Pilot plant; Sewage sludge