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Biological Waste Gas Treatment
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BRI-BIO Oxidation
BRI-BIO Oxidation
Efficient degradation of VOCs (volatile organic carbohydrates such as methanol, formaldehyde, etc.), hydrogen sulfide, NH3 and other substances in industrial and communal applications.
Characteristics
- Degradation of VOCs und HAPs (hazardous air pollutants) to harmless products
- Significantly lower investment and operating costs as compared to thermal or catalytic processes
- BSB degradation rate > 99 %
- CSB degradation rate 92 %
- Combined biological, chemical and physical purification processes
- Stable base material with significantly longer service life than conventional materials
Details
The system combines two proven and tested processes: chemo-physical and biological waste gas treatment.
Stage one removes water-soluble components from the waste gas in a scrubber. Stage two consists of a bio-filter with optimized base material. Refer to the illustration below for an overview of the process.
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Click on picture to enlarge
The conventional bio filter materials were replaced by a novel and stable base material, BioMatrix®. BioMatrix® consists of filler elements complemented by specially treated compost. The main advantages of the system are: the stable base material prevents unwanted bed compaction and undesired channeling, allowing deeper beds and longer operating times as compared to conventional systems; and Biomatrix® possesses a larger specific surface for processing untreated waste gas.
The bacteria and fungi in the compost substrate oxidize the toxic substances in the untreated gas to oxygen, water and CO2. Depending on the substances at hand, degradation rates vary between 70% und 98%. The harmful substances (VOCs and odors) are adsorbed and then decomposed biologically in the last process step. Refer to the illustration below for an overview:
The standard degradation rates for carbohydrates in waste gas lie above 70%. Gas analyses of a BRI-purification plant at 340,000m³ per hour and an untreated gas load of 4-25ppm formaldehyde and 20-30ppm methanol yielded degradation rates of 93-100% for methanol and 94-98% for formaldehyde.
Reference plant
Chipboard plant
Support
For more information on this product group please contact:
environmental-tech@lenzing.com
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