Product and process description

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SILOXA gas conditioning systems GRW 50, GRW 100 and GRW 200
stainless steel base frame for installation at ground
level, complete with pipework and cabling. All system components that come into contact with gas are
made of corrosion-resistant stainless steel.
Sizes/system components
GRW 50
GRW 100

Product description
SILOXA gas conditioning systems GRW 50, GRW 100
and GRW 200 are used for removing organosilicon
compounds (siloxanes) and optionally hydrogen sulphide (H2S) from fermentation gases. The GRW 50
variant has a single compact replaceable filter unit.
The GRW 100 and GRW 200 each have two activated
carbon filters connected in series on the gas side.
In the GRW 100 and GRW 200 systems, gas cleaning is performed in the first activated carbon filter
(working filter). The second filter is purely a safety filter
which only separates contaminants when the first filter’s absorption capacity is exhausted and the filter
breakthrough is not detected in time. The customer
is responsible for checking the load status through
regular gas sample testing between stages.
It is essential for the adsorption process that the
fermentation gas to be cleaned has a low relative
gas humidity. For this purpose, the systems come
equipped with a tube bundle heat exchanger in which
the saturated gas is heated before it enters the activated carbon filters in order to achieve the desired
relative gas humidity. To adsorb siloxanes, a relative
gas humidity of less than 50 % is necessary. If the
option for simultaneous removal of hydrogen sulphide
(H2S) has been selected, a relative gas humidity of
50-60 % is ideal.
The GRW 50, GRW 100 and GRW 200 gas cleaning
systems are delivered ready for use, mounted on a

2 x 200 l Activated carbon

GRW 200

SILOXA GRW schematic drawing

200 l Activated carbon
2 x 700 l Activated carbon

Design features (basic version)
– Frame
– Gas heating
– Heating water circuit
– Version GRW 50: one MAKA 200
– Version GRW 100: two MAKA 200
– Version GRW 200: two MAKA 700
– Factory assembly
– Technical documentation
Options (GRW 100 and GRW 200 only)
– Outside installation version
– Version with simultaneous removal of hydrogen
sulphide (H2S)
– Autonomous heating water supply
– Differential temperature control on mounting plate
– Differential temperature control mounted on system
– Air metering unit (necessary for H2S removal and
< 0.5 vol. % O2 in the gas)
– Machine container, 10 foot
– Assembly and commissioning
– Room air monitoring
– Bypass line
– Resistance thermometer PT 100
– 2 shut-off valves
Safety features
– All components are gas-tight – creates an EX-free
(non-hazardous) zone for the user. The GRW 50,
GRW 100 and GRW 200 therefore also conform to
the ATEX requirements for handling sewage gas.

Siloxa Engineering AG
Katernberger Strasse 107 | 45327 Essen | Germany
Tel. +49 (02 01) 2 89 51-0 | Fax +49 (02 01) 2 89 51-29
E-mail: vertrieb@siloxa.com | Web: www.siloxa.com