Biological trickle bed-reactor0 pages

Tholander Ablufttechnik | Biological trickle-bed reactors | 2010

Biological trickle bed-reactor
Lack of space, purification of waste gases with pH-relevant constituents or end products, and
applications where the sole use of a biofilter isn´t satisfying, require a different approach. Our offer for
these cases is the biological trickle bed-reactor.
The biological trickle bed-reactor has the same underlying technology as biofilters
and bioscrubbers for waste gas purification. The biodegradation of the ab- and
absorbed pollutants takes place in a biofilm. The main difference between biofilters and biological trickle bed-reactors is the nature of the biofilm support. Whereas biofilters use a natural filter medium, trickling bed-reactors use an inert fixed
bed as support for the micro-organisms which will degrade the constituents of the
contaminated air.

Working principle

Whereas the construction resembles a packed bed column, the trickle rate of the
liquid phase is too low for a scrubber application. The trickling liquid is only used to
moisture the biofilm and to compensate for the evaporation loss caused by the
waste gas flow.
In case of applications with pH-relevant constituents or end products the trickling
liquid can be used to control the pH-value. In this way compounds like NH3 und
H2S and their end products of degradation HNO4 and H2SO4 will not disturb the
microbial activity.
Off-gas

Distribution of
trickling liquid
.

Pump for liquid circulation

Gas flow inlet

Nutrient concentrate

Tholander Ablufttechnik GmbH

Werkstraße 31
68519 Viernheim
Deutschland

Tel:
Fax:

Reactor sump

[+49] 62 04 - 92 92 3-0
[+49] 62 04 - 46 41

info@tholander.de
www.tholander.de

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