What is a Biotrickling filtrating system?
A biotrickling filtration system is an advanced biological technology used for the removal of volatile organic compounds (VOCs) and malodorous gases from industrial emissions. It combines the features of a biofilter and a scrubber. This system harnesses the metabolic capabilities of specialized microorganisms to biodegrade organic pollutants. It involves a packed bed, typically made of inert structured plastic, which supports the growth of a biofilm of these microorganisms.
How does it work?
The operation of a biotrickling filtration system involves several steps: The contaminated gas stream is passed through the packed bed where microorganisms are immobilized. These microorganisms use the VOCs as a source of carbon and energy. Pollutants are transferred to the biofilm and the trickling water, which moves in countercurrent to the gas stream. This water not only feeds the microorganisms but also helps in the transfer of pollutants from the gas to the biofilm. The system is maintained under specific conditions, like optimal pH levels and concentrations of nutrients and salts, which are periodically checked to ensure efficient microbial activity. The biodegradation process results in the production of byproducts, which are purged along with small amounts of washing liquid and biomass. Finally, the clean gas exits the filtering chamber and passes through a mist eliminator, which removes any remaining liquid droplets.
Which problem can sort it out?
Biotrickling are efficient in removing VOCs and foul-smelling gases from industrial emissions, making them suitable for industries that emit these pollutants. These systems are environmentally sustainable, as they use naturally occurring microorganisms for pollutant degradation.