Biofiltration for VOCs and Odors abatement

Introduction：

biofiltration for waste gas streams containing VOCs and odorous compounds is more cost effective and environmental-friendly than conventional air pollution control technologies.In a biofilter, the pollutants are biologically degraded by aerobic microorganisms to stable end products like CO2, H2O, sulfate, microbial biomass, etc.

Application：

biofilter has been proved its high efficiency to remove pollutants from gas exhausts, which are generated from livestock breeding and poultry raising industry, food processing industry and wastewater treatment plant. Its cost effective and simply maintenance makes the biofilter world-wide popular.

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Working Princple

pollutants degradation in biofilm

In a biofilter, the polluted gases pass through a bed of packing media covered with a layer of aerobic microorganisms. The pollutants are transferred from air into the biofilm where they are utilized by microbes as energy source. In the same time, the packing bed is continuously irrigated with an aqueous solution containing essential nutrients required by the bio-organisms.

Process Flow

Exhaust gas condenser	The condenser turns most of the water vapor in the exhaust gas into liquid water, which can reduce the volume of the exhaust gas by more than 40% and reduce the subsequent processing load.
Chemical spray tower	The spray scrubber absorbs ammonia and hydrogen sulfide in the exhaust gas by adding different absorption liquids, reducing the load of biological trickling filtration.
biofiltration	Using VOCs in exhaust gas as the energy and carbon source of microorganisms, through the metabolism of microorganisms, degrade trimethylamine, ethanethiol, ammonia, hydrogen sulfide and other substances in exhaust gas into non-toxic and harmless CO2H2O, sulfate, nitrate, etc. of small molecules.

Features


Deodorization costs are lower	Friendly to the environment	No secondary pollution	Higher deodorization efficiency

Through biological filtration technology, the pollutants in the exhaust gas are degraded by aerobic bacteria into CO2, H2O, sulfate, nitrate and other stable products

Advantages of biological filtration: Compared with other deodorization technologies, biological filtration costs less, is more environmentally friendly, does not produce secondary pollution, and has higher removal efficiency.

Engineering case

Biological deodorization project case