title: Scale effect of anaerobic digestion tests in fed-batch and semi-continuous mode for the technical and economic feasibility of a full scale digester.
abstract: Methane production capacity in mesophilic conditions of waste from two food industry plants was assessed in a semi-pilot (6L, fed-batch) and pilot (300 L, semi-continuous) scale. This was carried out in order to evaluate the convenience of producing heat and electricity in a full scale anaerobic digester. The pilot test was performed in order to obtain more reliable results for the design of the digester. Methane yield, returned from the pilot scale test, was approximately 80% of that from the smaller scale test. This outcome was in line with those from other studies performed in different scales and modes and indicates the success of the pilot scale test. The net electricity produced from the digester accounted for 30-50% of the food industry plants' consumption. The available thermal energy could cover from 10% to 100% of the plant requirements, depending on the energy demand of the processes performed.
authors.affiliation: DIATI, Politecnico di Torino, Corso Duca degli Abruzzi, 24, 10129 Torino, Italy. Electronic address: barbara.ruffino@polito.it.
authors.forename: Barbara
authors.initials: B
authors.lastname: Ruffino
authors.affiliation: DIATI, Politecnico di Torino, Corso Duca degli Abruzzi, 24, 10129 Torino, Italy.
authors.forename: Silvia
authors.initials: S
authors.lastname: Fiore
authors.affiliation: DIATI, Politecnico di Torino, Corso Duca degli Abruzzi, 24, 10129 Torino, Italy.
authors.forename: Chiara
authors.initials: C
authors.lastname: Roati
authors.affiliation: DIATI, Politecnico di Torino, Corso Duca degli Abruzzi, 24, 10129 Torino, Italy.
authors.forename: Giuseppe
authors.initials: G
authors.lastname: Campo
authors.affiliation: SMAT, Società Metropolitana Acque Torino, S.p.A., via Po 2, 10090 Castiglione Torinese, TO, Italy.
authors.forename: Daniel
authors.initials: D
authors.lastname: Novarino
authors.affiliation: DIATI, Politecnico di Torino, Corso Duca degli Abruzzi, 24, 10129 Torino, Italy.
authors.forename: Mariachiara
authors.initials: M
authors.lastname: Zanetti
mesh_terms: D000693:Anaerobiosis; D061249:Batch Cell Culture Techniques; D056804:Biofuels; D019149:Bioreactors; D001709:Biotechnology / Q000295:instrumentation / Q000379:methods*; D003362:Cost-Benefit Analysis; D019649:Food Industry; D008697:Methane / Q000096:biosynthesis* / Q000191:economics; D010865:Pilot Projects; D059205:Renewable Energy; D014675:Vegetables; D014865:Waste Disposal, Fluid / Q000379:methods
chemical_list: D056804:Biofuels; D008697:Methane
keywords: Cost–benefit analysis; Fed-batch tests; Mesophilic anaerobic digestion; Semi-continuous tests; Vegetable processing waste