Biofiltration0 pages
CLEAN AIR
Environmental Engineering
Cost-effective solutions for
Air Pollution Control
Tholander Ablufttechnik I Biofiltration I 2010
Biofiltration
Like natural biodegradation the purification of air pollutants by biofiltration works with indigenous
microorganisms.
Working principle
The heart of the biofilter is the filter bed consisting of organic material. A natural
microflora is colonizing on the large surface of the chosen filter medium. Good
biofilter media stimulate multiplication and adaptation of micro-organisms by
supplying optimal growth conditions. The pollutants are (ad)sorbed by the large
inner surface of the biofilter medium and catabolized by the microorganisms
within the biofilm. To use this natural processes in a highly efficient way Tho-
lander chooses specifically treated biofilter material with a high biological
activityresulting in excellent purification efficiency and an even flow.
To preserve the optimum conditions of growth and degradation for the micro-
organisms Tholander configures its biofilters with an upstream scrubber unit. This
is a packed column integrated into the distribution chamber of the biofilter and
which pre-conditions the inlet air: In the simplest application pre-conditioning
relates to humidifying the air up to saturation. The humidification allows
maintaining the water content of the biofilter medium at a sufficient level, needed
for proper functioning of the microorganisms.
Kernschuttung
Vorwascher
Pumpe
AnstrSmschicht
Tragrost
Tholander Ablufttechnik GmbH WerkstraGe 31 Tel:
68519 Viernheim Fax:
Deutschland
[+49] 62 04 - 92 92 3-0
[+49] 62 04 - 46 41
info@tholander.de
www.tholander.de
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