Click on “Download PDF” for the PDF version or on the title for the HTML version.

If you are not an ASABE member or if your employer has not arranged for access to the full-text, Click here for options.

The Development of a Dynamic Flux Chamber System for the Collection of Gaseous Emissions During On-Farm Composting of Animal Mortalities.

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan

Citation:   No Citation available.
Authors:   P J Linton, B J Van Heyst

The interest in on-farm composting of animal mortalities (deadstock) has emerged over the past decade due to increasing rendering costs and biosecurity issues posed by traditional deadstock collectors. Although composting is a widely accepted method of deadstock disposal there has been few studies performed on the environmental impacts associated with the process, particularly the atmospheric emission of compost gases. A preliminary methodology for characterizing emissions from deadstock composting has been developed. A state of the science compost facility has been constructed to perform species-specific bin composting trials in a semi-controlled environment. To obtain a representative emission sample, a dynamic flux chamber has been developed to enclose an entire bin and supply a constant airflow across the compost pile. Integrated air samples were collected over an hour period from the exhaust of the flux chamber and analyzed for CO2, CH4/non-methane VOCs, NH3/NO2/NO, and SO2. A series of tests have been performed to analyze the performance of the dynamic flux system. Recovery tests using SO2 as a trace gas have yielded values up to 91.9%. Steady readings were usually achieved within 5 minutes of sampling. Further testing is required to fully evaluate the systems performance. Once the design of the methodology is complete long-term compost emission studies can be performed resulting in the development of composting emission factors.

(Download PDF)    (Export to EndNotes)