Activated graphite SAG™

- Filtration - siloxanes treatment - Verdesis is the distributor for Applied Filter Technology - www.appliedfiltertechnology.com - in Europe. Verdesis has Europeanized equipment compatible with the utilization of the SAGTM media from AFT. The inventory - the logistics is in place in order to deliver - transport - use - discharge - and manage the waste products. Applied Filter Technology is the American leader for the biogas filtration regarding siloxane aerobic H2S filtration, for biogas flow from 20Nm3/h up to 4000m3/h. 1 - The siloxane filter Wherever siloxane problem is diagnosed, Verdesis approach is the following: A - Biogas sampling : This sample take, fundamental to measure the exact composition of the biogas (whereas usually, the operator don't know his problem of siloxanes that from the concentration of these in oils, on the occasion of the draining), The analysis is done the same day of the sampling done with a tedlar bag: 1. 8 siloxanes 2. silanols 3. 250 Organic Components Volatil 4. Major components CH4, CO2, N2, O2, Verdesis recommends the laboratory DCMS in Bierge, Belgium dcms@dcms.be - http://www.dcms.be B - Biogas filtration system : Once the granulates type has been determined, a study allowing to define the size of the silos and the frequencies of change will be conducted, so that there is always at least one silo in activity and that the biogas is continuously filtered:

Biogas drying - compression - reheating

However, even though it was essential to be able to count on turbines capable to run with different biogases, it was necessary to define, develop and experiment the auxiliaries appropriated to this operation mode and which can bring, all along the many ten thousands hours of the energy supply contracts, the hardiness and the necessary reliability. Auxiliaries - Chiller Compressors Verdesis has developed a unique system in Europe based on rotary vane compressor using frequency inverter controlled motor to minimize the parasites losses. The siloxanes filter is based on the most efficient technology the SAG™.

Electrical valorization of biogas

1 – Electrical valorization for poor quality biogas Verdesis team core business is to make turnkey projects on biogas valorization from filtering up to electrical valorization on poor quality biogas : CH4 < 45% , high level of H2S, high level of siloxanes, fast decreasing curve on aging landfill. Verdesis solutions are customized to customer needs. 2 - The microturbines development The technology of the turbines is known and revealed since numerous years but, for what concerns those of small capacity (<200 kW), and even though they equipped number of planes in APS mode (Auxiliary Power Supply), it had to wait for the years '90 so that, following the policies of deregulation, one begins to consider decentralized production and launches the first electrical applications from micro-turbines. The teams who participate today in the Verdesis adventure were part of this movement since, within EDF or Honeywell Power Systems, they launched the development of the Parallon 75, the turbine of 75 kW developed by Honeywell, on a diagram similar enough to the one which Capstone was launching more or less at the same time (1995) on a technology of oil levels. The first micro-turbines, in aeronautic application, operated to the kerosene but, very quickly, the functionalities: natural gas, propane, and diesel have been finalized and then, since 2000, more particular applications (sweet flare gas, sour flare gas, landfill gas or sewage gas) have been launched, essentially by Honeywell and Capstone. Of the three pioneer enterprises, Honeywell (Power Systems), Capstone turbine and Elliott, only two remain in activity, Honeywell Inc. having decided, following the decision of the European Commission not to allow the acquisition of Honeywell by General Electric (July 2001) to come out of this sector. Elliott has been purchased by the Japanese Group Ebara that entered into a complete recast of the methods and processes.

Verdesis installation in Itradec, Mons, Belgium- iron sponge system to remove H2S in biogas

Verdesis is using a new design in order to inject oxygen in the biogas to help the iron sponge to self regenerate. The H2S react with the iron-oxyde, the next reaction between the intermediate product and the oxygen led to the apparition of elementary Sulfur molecule (S). This is an inert molecule as well as a fertilizing. This system allows to triple the loading of the iron sponge from 10% up to 30%. The vessel size would be done to get 60 seconds contact time minimum. Running cost for the iron sponge system versus activated impregnated carbon is 2-3 times cheaper

Verdesis is Capstone distributor

Capstone world leader in the microturbine segment has accumulated more experience than the sum of the competitors (http://www.microturbine.com). Verdesis has a distribution agreement in place since 2002. Verdesis has currently more sites on biogas than any others Capstone distributor in Europe. Verdesis sites in operation covers Belgium, France, Italy, Switzerland and Germany. Specification of the Capstone microturbine are detailed below : • 30 kW brut / 26% net efficiency, • CH4 > 35%, • NOx : 9ppm @ 15% O2, • 65 dBa @ 10 meters (without container), • dimensions : 1.950 mm x 764mm x 1.515mm -- 478 kgs, • biogas inlet pressure : 4 - 6 bars