Brentwood have developed an exclusive arrangement with Gicom of Holland to distribute Gicom technology and plant in the in vessel waste composting market in Australia, New Zealand and South East Asia.

GICOM In-Vessel Composting

GICOM In-Vessel Composting Plants

Odour Control System

All exhaust process air (the Overpressure Airstream) is directed to the (acid) scrubber where it is humidified prior to being exhausted to the biofilter.

Covered Biofilter

At several positions in the Odour Control System the airstream is monitored for the following parameters in order to be able to control essential setpoints in the Odour Control System:

  • temperature
  • air pressure
  • air humidity
  • maximum air pressure

After the scrubber, the exhausted, humidified process air is transported via a valve system and a pressure controlled blower, through an enclosed ductwork to the biofilters. The temperature of the biofilter matrix is also monitored. With these measurements, the temperature of the biofilter matrix can be controlled to remain within the optimum range for the cleaning and degradation of odorous compounds.

The GICOM system is able to meet the high odour standards in The Netherlands and Germany, based on the technic of olfactometry. Following biofilter emission numbers are based on multiple measurements done at several GICOM composting plants in Germany and The Netherlands and show that the average emission level is 250 European OU/m³ (=500 Dutch OU/m³ and =50 germanOU/m³)

The European Odour Unit is described in a recent directive (EN publication summer 1997)


Brentwood Recycling Systems is proud to represent GICOM in Australia, New Zealand and South East Asia.