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Low Cost Biofilter Construction/ Evaluation
By Various (see paper) - Biofiltration is an air pollution control technology adapted from naturally occurring processes, which use microorganisms to oxidize volatile organic compounds.
A barn biofilter consists of a bed of material with a large surface
area, for example a mixture of coarse wood chips and fine materials, such as
compost. As the barn air moves through the biofilter, and thus, the living
ecosystem of bacteria and fungi that live on the biofilter's media surface, the
low concentrations of organic compounds that create the odours are removed.
Up to 90% of barn odour can be removed from the exhaust air by biofiltration.
Three biofilter projects, designed and constructed by Alberta Agriculture, are
underway in Alberta:
- A biofilter on an 1800 pig grower finisher barn near Bentley.
- A biofilter on the new composting facility at the University of Alberta
- A biofilter construction plan has been finished for a barn east of Edmonton, construction of several biofilter modules is planned for early this winter.
The expectation is that the results will lead to a better understanding of biofilter characteristics under Alberta conditions, design guideline development and a database of performance criteria that can be used to assess biofilter technology as applied to the minimum separation.
Implications
The expected results from this project will be biofilter design and construction information for Alberta. When siting new or expanding operations and calculating the MDS, the effects of reducing MDS by using biofilters can be quantified.To read the pdf version of this paper Click Here (1 page pdf file, opens in new browser)
Source: Paper presented at the Banff Pork Seminar - January 2002
