Biofilter

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biofilter

[′bī·ō‚fil·tər]
(engineering)
An emission control device that uses microorganisms to destroy volatile organic compounds and hazardous air pollutants.

Biofilter

 

apparatus for the biological treatment of sewage. It is a round or rectangular tank with a double bottom filled with a filtering material (boiler slag, granite chips, gravel, porous clay filler, and so on). The bottoms are at least 0.4 m apart. The filtering layer is 1.5–2 m high; the grainsize of the filtering layer is 30–50 mm, and of the lower underlying layer, 60–100 mm. When sewage passes through the filtering material, a biological film forms on its surface. The film consists of accumulations of bacteria and fungi that oxidize and mineralize the organic matter in the sewage. The oxidation capacity of a biofilter is determined experimentally.

References in periodicals archive ?
The challenge is to design small biomass systems with individual biofilters so when a system fails, the economic loss is small.
Part 5 Wastewater Treatment plant by biofilters preventive maintenance, repair and renovation.
In both tests, the biofilters removed more than 99% of odorous emissions and more than 95% of ethanol emissions.
a leading designer and manufacturer of biofilters used in air pollution control and soil and wastewater treatment.
Bioreactors, biofilters, air intake and exhaust vent pipes and leachate drainage technology, compressor stations, tank effluent technology.
John Riley, professor of bioresource engineering at the University of Maine is studying biofilters with graduate student David Cole.
Open Competition: Supply of polymer loading biofilters for wastewater treatment V = 550 cubic meters
Project Description: Improved environmental and productive treatment suds through biofilters and Micro organisms for the production of flowers and ornamental Nature Reserve Tisey Estanzuela.
The business of the company is the design and installation of municipal and industrial biofilters for the North American market.
The District intends to secure services to perform repairs to the Influent and Solids Biofilters including: removal of filter media and concrete underbed panels, surface preparation and application of a protective epoxy coating to the specified internal concrete surfaces, placement of new plastic underbed air distribution panels, and placement of existing filter media back into filter beds at the Atherton Wastewater Treatment Plant, 21208 East Old Atherton Road, Independence, Missouri, as indicated on the attached drawings.
The work for which proposals are invited consists of: The demolition and reconstruction of two (2) biofilters along the Upper Scioto West Interceptor Sewer on the west side of