title: Volatile emissions during storing of green food waste under different aeration conditions.
abstract: Controlled field experiments were carried out for monitoring the emissions of three plastic commercial household waste bins, which were adapted for studying the effect of aeration process in the evolved volatiles, during house storing of green food waste for 2 weeks, prior to collection. Three experimental scenarios were examined based on no aeration ("NA," closed commercial waste bin), diffusion-based aeration ("DA," closed commercial waste bin with tiny holes), and enforced aeration ("EA," closed commercial waste bin with tiny holes and enforced aeration). The monitoring of volatile organic compounds (VOCs) emitted from organic household kitchen waste was performed using solid-phase microextraction-gas chromatography-mass spectrometry (SPME-GC-MS) analysis. Portable sensors were also used for monitoring selected gases and parameters of environmental, bioprocess, and health interest (e.g., CO2, O2, H2S, CH4, NH3, % RH, waste temperatures). VOC emissions are strongly dependent on the waste material. The most frequent VOCs identified over the storing waste, showing over 50 % appearance in all examined samples, were terpenes (e.g., di-limonene, beta-myrcene, delta-3-carene, alpha-pinene, alpha-terpinolene, linalool, etc.), sulfides (dimethyl disulfide), aromatics (benzene, 1-methyl-2-(2-propenyl)), alkanes (e.g., decane, dodecane), ketones (2-propanone), esters (e.g., acetic acid ethyl ester, acetic acid methyl ester), and alcohols (e.g., 3-cyclohexen-1-ol, 4-methyl-1-(1-methylethyl)). The prominent role of terpenes in the "pre-compost" odor and especially that of di-limonene was highlighted. In all examined scenarios, the emitted volatiles were increased at raised temperatures and later decreased in time. Aeration of waste bins slightly affected the volatilization process resulting in higher profiles of VOCs; uniformity in the composition of VOCs was also noted. Slight modifications of commercial waste bins may favor the initiation of home composting.
authors.affiliation: Department of Chemistry, University of Cyprus, P.O. Box 20537, Nicosia, 1678, Cyprus. agapiou.agapios@ucy.ac.cy.
authors.forename: A
authors.initials: A
authors.lastname: Agapiou
authors.affiliation: Field Analytical Chemistry and Technology Unit, School of Chemical Engineering, National Technical University of Athens, 9 Iroon Polytechniou Street, Athens, 157 73, Greece.
authors.forename: J P
authors.initials: JP
authors.lastname: Vamvakari
authors.affiliation: Helesi PLC - Hellenic Environmental Systems Industry AE, Industrial Park of Markopoulo, Location "Ntorovateza", Athens, Attiki, GR-19003, Greece.
authors.forename: A
authors.initials: A
authors.lastname: Andrianopoulos
authors.affiliation: Field Analytical Chemistry and Technology Unit, School of Chemical Engineering, National Technical University of Athens, 9 Iroon Polytechniou Street, Athens, 157 73, Greece.
authors.forename: A
authors.initials: A
authors.lastname: Pappa
mesh_terms: D000080462:Acyclic Monoterpenes; D000393:Air Pollutants / Q000032:analysis*; D000081008:Bicyclic Monoterpenes; D004784:Environmental Monitoring; D005502:Food; D005735:Garbage; D008401:Gas Chromatography-Mass Spectrometry; D007659:Ketones / Q000032:analysis; D039821:Monoterpenes / Q000032:analysis; D009812:Odorants / Q000032:analysis*; D012987:Soil / Q000737:chemistry; D052617:Solid Phase Microextraction; D055549:Volatile Organic Compounds / Q000032:analysis*; D014835:Volatilization; D014866:Waste Products / Q000032:analysis*
chemical_list: D000080462:Acyclic Monoterpenes; D000393:Air Pollutants; D000081008:Bicyclic Monoterpenes; D007659:Ketones; D039821:Monoterpenes; D012987:Soil; D055549:Volatile Organic Compounds; D014866:Waste Products; C008574:beta-myrcene; C030218:3-carene; C005451:alpha-pinene
keywords: Household composting; Odor nuisance; Organic waste; SPME-GC-MS; VOC emissions; Waste bins
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