The best utilisation of biogas is upgrading to natural gas quality. The best way to do this is with pressurized water scrubbing. This presentation shows 4 innovations in the field of biogas upgrading with the PWS system, making it the ultimate upgrading technology. (presented at Bremen, waste to energy fair).

1. “ Making pressurized water scrubbing the ultimate biogas upgrading technology with the DMT TS-PWS ® system” R. Lems M.Sc. , R&D Manager DMT Environmental Technology

2. Why biogas upgrading? Gas treatment (desulphurisation) Gas Treatment (upgrading) Green gas (CBG: Compressed BioGas) Mobility Power 40% Biogas Heat 60% CHP Natural gas grid Digester

3. Biogas as Vehicle Fuel

4. Why upgrading Biogas? Substance % Methane, CH 4 45-75 Carbon dioxide, CO 2 25-45 Carbon monoxide, CO 0-0,3 Nitrogen, N 2 1-15 Water, H 2 O Saturated Hydrogen sulfide, H 2 S 0,1-0,5 Oxygen, O 2 Siloxane, R 2 SiO traces

6. Choice for Full-scale? ISET 09-09-2009

7. Choice for Full-scale? ISET 09-09-2009

9. Flash vessel Pump Compressor H 2 S removal Absorber Stripper Air blower Dryer Chiller 4 Innovative improvements

11. H 2 S + O 2 => H 2 SO 4 T=30C pH= 0.5-1.5 Biological desulphurization DMT-TS-PWS ® No Chemical use!

12. Power 15kWe cooling 52.5 kWq Heat 67.5 kWq Heat Pump technology Chiller DMT-TS-PWS ® Heat pump power

13. CO 2 Recovery DMT-TS-PWS ® -25 to -30C and 12-15 bar Food grade:>99.99% pure

15. Plant Examples

17. Utilisation of Biogas

18. “ Making pressurized water scrubbing the ultimate biogas upgrading technology with the DMT TS-PWS® system” R. Lems M.Sc. , R&D Manager DMT Environmental Technology: RLems@dmt-et.nl

22. 550Nm 3 /hr biogas 65% CH 4

23. Direct catalytic regenerative oxidation 99.9% removal of CH 4 + H 2 S Heat recovery from the CH 4 CH 4 emision control DMT-TS-PWS ®

24. Plant examples