Evaluating Design Options for Biofilters

Autor:	Gero Leson, Richard Michelsen, Chris van Lith
Rok vydání:	1997
Předmět:	Pollutant Irrigation Engineering Waste management Filter media Moisture business.industry Air pollution Environmental engineering Management Monitoring Policy and Law medicine.disease_cause Biofilter medicine business Waste Management and Disposal Water content
Zdroj:	Journal of the Air & Waste Management Association. 47:37-48
ISSN:	2162-2906 1096-2247
DOI:	10.1080/10473289.1997.10464410
Popis:	Biofilters are now increasingly offered and accepted in North America for air pollution control. However, prospective buyers often lack the technical and economic criteria to select a suitable biofilter design for their applications. This paper summarizes past experiences with full-scale biofilters and emerging design trends. Since control of the filter media’s moisture content is essential for effective pollutant removal, the processes affecting moisture content are reviewed and ranges for evaporation rates and dry-out periods are estimated. High VOC concentrations and elimination rates cause high moisture removal and require additional irrigation; excessive irrigation or condensation of moisture from hot off-gases routinely cause over-watering and poor performance. Consequently, an application’s moisture balance should be evaluated carefully prior to selecting a biofilter design. High VOC loadings and the need for low maintenance and verifiable pollutant removal favor fully enclosed vessels wit...
Databáze:	OpenAIRE
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