Correlation between physical compost parameters and gaseous emissions

Authors: Peachey, B, Og Clark
Description: Composting has the benefits of being less energy-intensive then thermal processing of the same wastes and yielding a useful product. If biodegradation is not thorough, however, the product can be biohazardous. Furthermore, gas emissions from composting can be potentially harmful to the environment, and to workers in composting facilities. The production of carbon monoxide (CO), for instance, is of specific concern. The objective in this research is to examine the relationship between physical compost parameters such as moisture and oxygen levels, compost maturity, and temperature, and the emission of gasses such as of CO, CO2, NOx and CH4. Conditions that minimize the physiochemical production of ozone depleting gasses and CO are relevant to the safety of compost facility workers and the quality of the environment. A multi-stream FTIR gas analyzer will be used to determine the concentrations of gasses in the compost matrix and in the intake and exhaust streams of passively-aerated, pilot-scale compost reactors. Physical parameters will be monitored, such as the rate of gas throughput, compost temperature, and moisture content. A smoke-tracer airflow meter will be implemented to measure the low flow rates, in order to determine the mass balance of the compost gas constituents. A detailed experimental design and preliminary results will be presented.
Keywords: compost, gas, emissions, ftir
Technical field: technical_fields_app9
Session name: Waste management
Date: 2012
Identifier: CSBE12097
Coverage: Canada

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