title: Sustainable options for the utilization of solid residues from wine production.
abstract: The efficient use of solid organic waste materials is an issue of particular importance for the wine industry. This paper focuses on the valorization of grape marc, the major component of winery organic waste (60-70%). Two methods were designed and compared: combustion to generate electricity, and the pyrolysis for the production of bio-char, bio-oil, and bio-gas. Each of these processes was analysed to determine their economic and environmental viability. The flow-sheeting software, ASPEN PLUS, was used to model the two cases. Data from the simulations was used to inform techno-economic and environmental analyses. Pyrolysis was found to be the superior method of utilizing grape marc from both economic and environmental perspectives. Both pyrolysis and combustion exploit the energy content of the waste, which is not recovered by the traditional treatments, composting or distillation. In addition to the production of energy, pyrolysis yielded 151kg of bio-char and 140kg of bio-oil per tonne of grape marc. These products may be used in place of fossil fuels, resulting in a net reduction of carbon dioxide emissions. However, the potential deleterious effects resulting from the replacement of the traditional treatments was not considered. Investment in either pyrolysis or combustion had a negligible impact on the price of the wine produced for wineries with an annual grape crush larger than 1000 tonnes. Composting has significant economic advantages in wineries with a small grape crush of less than 50 tonnes.
authors.affiliation: School of Chemical Engineering, Monash University, Clayton, Victoria 3168, Australia.
authors.forename: Nansen
authors.initials: N
authors.lastname: Zhang
authors.affiliation: School of Chemical Engineering, Monash University, Clayton, Victoria 3168, Australia.
authors.forename: Andrew
authors.initials: A
authors.lastname: Hoadley
authors.affiliation: CSIRO Energy, 71 Normanby Road, Clayton North, Victoria 3169, Australia.
authors.forename: Jim
authors.initials: J
authors.lastname: Patel
authors.affiliation: CSIRO Energy, 71 Normanby Road, Clayton North, Victoria 3169, Australia.
authors.forename: Seng
authors.initials: S
authors.lastname: Lim
authors.affiliation: CSIRO Energy, 71 Normanby Road, Clayton North, Victoria 3169, Australia. Electronic address: Chaoen.Li@csiro.au.
authors.forename: Chao'en
authors.initials: C
authors.lastname: Li
mesh_terms: D000383:Agriculture; D001315:Australia; D056804:Biofuels / Q000032:analysis*; D007220:Industrial Waste / Q000032:analysis*; D012037:Refuse Disposal; D027843:Vitis / Q000254:growth & development; D018505:Waste Management / Q000379:methods*; D014920:Wine
chemical_list: D056804:Biofuels; D007220:Industrial Waste
keywords: ASPEN simulation; Combustion; Grape marc; Pyrolysis