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- W1549074211 abstract "This thesis reports on experimental and modelling work carried out in order to makequantitative estimates on the environmental impacts of home composting. The focus ofthe work was climate relevant gaseous emissions, and developing and utilising amethodology for quantifying them. Experiments using 220L open bottomed homecompost bins, alongside purpose built 200L composting reactors with airflow controlwere performed. A variety of composting conditions were tested, using differentcompositions of garden and kitchen wastes. The experiments were monitored forheadspace gas composition, including CO2, O2, NH3, N2O, CH4 and volatile organiccompounds, as well as temperature, humidity, moisture and solids losses and pH. From the CO2 emission rates calculated from the reactor experiments, theoreticalanalysis and modelling and airflow pathway tests on home compost bins, it wasconcluded that molecular diffusion, rather than bulk convective flow, is the dominantgas transfer mechanism from home compost bins. There were no detected emissions ofN2O but emissions of NH3 up to 16 g/T feed. Only a few cases of CH4 emission weredetected, typically in the first 2-3 days following a feed addition, with the highest singleconcentration measured at 86 ppm within the headspace. The total anthropogenic greenhouse gas emissions from home composting wereestimated as between 3 and 12 Kg CO2E/Tw with almost 90% coming from the lifecycleof the compost bin. This compares with between 20 and 56 Kg CO2E/Tw fromcentralised facilities, at least more than double that for home composting. Totalanthropogenic CO2-equivalent emissions from home composting in the UK in 2008were estimated to be in the region of 7 thousand tonnes CO2E." @default.
- W1549074211 created "2016-06-24" @default.
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- W1549074211 date "2008-07-01" @default.
- W1549074211 modified "2023-09-23" @default.
- W1549074211 title "Physical chemical processes and environmental impacts associated with homecomposting" @default.
- W1549074211 hasPublicationYear "2008" @default.
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