Biofiltration

Biofiltration is the process of purifying air using microorganisms found on a solid support. The principle of operation is based on biodegradation, the passage of air through the biofilter, microorganisms convert pollutants into CO₂ and water.

Biodegradation takes place in two steps:

1. absorption of gaseous components into the liquid phase or biofilm
2. aerobic biodegradation of contaminants in solution or biofilm

air + H₂S + NH₃ + (…) + O₂ -> cellular material + CO₂ + H₂O + H₂SO₄ + NH₄⁺ ( …)

The capacity of the biofilter is up to 2000 m³/ h.

For biofiltration to be successful, several conditions must be met: the air temperature must be 5 - 40 ° C, the impurities in the air must be soluble in water and be subject to microbiological degradation, the humidity must be> 70%. Polluted air must not contain substances that are toxic to biomass, ie microorganisms, dust and grease. Purification is most optimal at an air flow of 100 - 500 m / h, and the minimum contact time between the air and the biofilter is 30 seconds.

Advantages:

• easy to use
• no chemicals are required in operation

In order for the filling to work most optimally, it must have a good water retention capacity, support a low pressure drop, good mechanical properties, and must have a good food source for microorganisms.

Wood chips, coconut fiber can be used as filling in biofilters…

TECHNOLOGY

- biological decomposition (oxidation) of harmful substances by passing polluted air through the substrate with a culture of microorganisms

PURPOSE

- removal of harmful substances and unpleasant odors from wastewater treatment plants and industrial plants

AIR PURIFICATION CAPACITY

- up to 100,000 m3 / h

CONSTRUCTION MATERIAL

Up to 2,000 m3 / h, compact design:

- polyethylene (PE)
- polypropylene (PP)
- polyvinyl chloride (PVC)

Over 2,000 m3 / h:

- concrete design