Mike Barnett digestion@crest.org Compressing biogas is no different than any other gas I assume no oxygen is present. For low pressures, to fill a plastic bag a simple centrifugal unit would be used. For higher pressure a standard piston compressor would be fine. You should make sure the water content and H2S is low for a piston unit. There are all sorts of dryers, I even invented a simple electrostatic unit but I haven’t found a manufacturer yet. The H2S comes out if you bubble the gas through household bleach, it will form SO2 so you have to be careful about that. Let me know if I can be of more help. Prof. Stuart A. Hoenig, P.E., Ph.D Dept. of Agricultural & Biosystems Engineering University of Arizona, Tucson, AZ 85721-0038 Tel: 520-887-3815 Fax: 520-887-9727 hoenig@ece.arizona.edu hoenigc@azstarnet.com Digestion List Archives: http://www.crest.org/discussion/digestion/200202/ Digestion List Moderator: Paul Harris, paul.harris@adelaide.edu.au http://www.roseworthy.adelaide.edu.au/~pharris List-Post: <mailto:digestion@crest.org> List-Help: <mailto:digestion-help@crest.org> List-Unsubscribe: <mailto:digestion-unsubscribe@crest.org> List-Subscribe: <mailto:digestion-subscribe@crest.org> Other Digestion Events and Information: http://www.bioenergy2002.org http://crest.org/discussiongroups/resources/biomass/biogas/BIOGASMK.pdf http://www.crest.org/articles/static/1/1010424940_7.html Beginners Tour of Biogas http://WWW.roseworthy.adelaide.edu.au/~pharris/biogas/beginners
