| Title: | Chemical and odor characterization of gas emissions released during composting of solid wastes and digestates |
| Author(s): | Rincon CA; De Guardia A; Couvert A; Le Roux S; Soutrel I; Daumoin M; Benoist JC; |
| Address: | "Irstea, UR OPAALE, 17 Avenue de Cucille, CS 64427, F-35044, Rennes, France. Electronic address: carlos-andres.rincon@irstea.fr. Irstea, UR OPAALE, 17 Avenue de Cucille, CS 64427, F-35044, Rennes, France. Electronic address: amaury.de-guardia@irstea.fr. Univ Rennes, Ecole Nationale Superieure de Chimie de Rennes, CNRS, ISCR - UMR6226, F-35000, Rennes, France. Electronic address: annabelle.couvert@ensc-rennes.fr. Irstea, UR OPAALE, 17 Avenue de Cucille, CS 64427, F-35044, Rennes, France. Electronic address: sophie.leroux@irstea.fr. Univ Rennes, Ecole Nationale Superieure de Chimie de Rennes, CNRS, ISCR - UMR6226, F-35000, Rennes, France. Electronic address: isabelle.soutrel@ensc-rennes.fr. Irstea, UR OPAALE, 17 Avenue de Cucille, CS 64427, F-35044, Rennes, France. Electronic address: mylene.daumoin@irstea.fr. Irstea, UR OPAALE, 17 Avenue de Cucille, CS 64427, F-35044, Rennes, France. Electronic address: jean-claude.benoist@irstea.fr" |
| DOI: | 10.1016/j.jenvman.2018.12.009 |
| ISSN/ISBN: | 1095-8630 (Electronic) 0301-4797 (Linking) |
| Abstract: | "Hazardous and odorous gas emissions from composting and methanization plants are an issue of public concern. Odor and chemical monitoring are thus critical steps in providing suitable strategies for air pollution control at waste treatment units. In this study, 141 gas samples were extensively analyzed to characterize the odor and chemical emissions released upon the aerobic treatment of 10 raw substrates and five digestates. For this purpose, agricultural wastes, biowastes, green wastes, sewage sludge, and municipal solid waste (MSW) were composted in 300?ª+L pilots under forced aeration. Gas exhausts were evaluated through dynamic olfactometry and analytical methods (i.e., GC/MS) to determine their odor concentration (OC in OU(E) m(-3)) and chemical composition. A total of 60 chemical compounds belonging to 9 chemical families were identified and quantified. Terpenes, oxygenated compounds, and ammonia exhibited the largest cumulative mass emission. Odor emission rates (OU(E) h(-1)) were computed based on OC measurements and related to the initial amount of organic matter composted and the process time to provide odor emission factors (OEFs in OU(E) g(-1)OM(0)). The composting process of solid wastes accounted for OEFs ranging from 65 to 3089 OU(E) g(-1)OM(0), whereas digestates composting showed a lower odor emission potential with OEF fluctuating from 8.6 to 30.5 OU(E) g(-1)OM(0). Moreover, chemical concentrations of single compounds were weighted with their corresponding odor detection thresholds (ODTs) to yield odor activities values (OAVs) and odor contribution (PO(i), %). Volatile sulfur compounds were the main odorants (PO(i)?ª+=?ª+54-99%) regardless of the operational composting conditions or substrate treated. Notably, methanethiol was the leading odorant for 73% of the composting experiments" |
| Keywords: | *Composting Odorants Sewage Solid Waste Sulfur Compounds Forced aeration Methanethiol Odor activity values Odor emission factors Volatile sulfur compounds; |
| Notes: | "MedlineRincon, Carlos Andres De Guardia, Amaury Couvert, Annabelle Le Roux, Sophie Soutrel, Isabelle Daumoin, Mylene Benoist, Jean Claude eng England 2018/12/17 J Environ Manage. 2019 Mar 1; 233:39-53. doi: 10.1016/j.jenvman.2018.12.009. Epub 2018 Dec 14" |
