title: The use of life cycle assessment for the comparison of biowaste composting at home and full scale.
abstract: Environmental impacts and gaseous emissions associated to home and industrial composting of the source-separated organic fraction of municipal solid waste have been evaluated using the environmental tool of life cycle assessment (LCA). Experimental data of both scenarios were experimentally collected. The functional unit used was one ton of organic waste. Ammonia, methane and nitrous oxide released from home composting (HC) were more than five times higher than those of industrial composting (IC) but the latter involved within 2 and 53 times more consumption or generation of transport, energy, water, infrastructures, waste and Volatile Organic Compounds (VOCs) emissions than HC. Therefore, results indicated that IC was more impacting than HC for four of the impact categories considered (abiotic depletion, ozone layer depletion, photochemical oxidation and cumulative energy demand) and less impacting for the other three (acidification, eutrophication and global warming). Production of composting bin and gaseous emissions are the main responsible for the HC impacts, whereas for IC the main contributions come from collection and transportation of organic waste, electricity consumption, dumped waste and VOCs emission. These results suggest that HC may be an interesting alternative or complement to IC in low density areas of population.
authors.affiliation: SosteniPrA Research Group, Institute of Environmental Science and Technology (ICTA), Universitat Autònoma de Barcelona, 08193 Edifici C Bellaterra (Barcelona), Spain.
authors.forename: Julia
authors.initials: J
authors.lastname: Martínez-Blanco
authors.forename: Joan
authors.initials: J
authors.lastname: Colón
authors.forename: Xavier
authors.initials: X
authors.lastname: Gabarrell
authors.forename: Xavier
authors.initials: X
authors.lastname: Font
authors.forename: Antoni
authors.initials: A
authors.lastname: Sánchez
authors.forename: Adriana
authors.initials: A
authors.lastname: Artola
authors.forename: Joan
authors.initials: J
authors.lastname: Rieradevall
mesh_terms: D004784:Environmental Monitoring; D005740:Gases / Q000032:analysis; D057232:Global Warming / Q000517:prevention & control*; D007221:Industry; D009930:Organic Chemicals / Q000378:metabolism; D012037:Refuse Disposal / Q000379:methods*; D055549:Volatile Organic Compounds / Q000032:analysis
chemical_list: D005740:Gases; D009930:Organic Chemicals; D055549:Volatile Organic Compounds