C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
362/6
C02F 11/04 (2006.01) C12M 1/107 (2006.01)
Patent
CA 1221478
ABSTRACT An apparatus for the anaerobic production of methane from a substrate is described. The production is carried through in two stages, and the apparatus comprises a digester vessel (104) in said second stage adapt- ed to anaerobically enclose a substrate and to have methane gas removed therefrom; means (106) in the upper portion of the digester vessel for removal of gas; means (112, 114) for transferring substrate from the first stage to the digester vessel; first stage means including an antechamber (130) for processing fresh substrate before insertion of the substrate into the digester vessel means (104), which antechamber (130) is located separately from the diges- ter vessel (104) and connected to the digester vessel (104) by a number of transportation means; said first stage means including means for accu- mulating substrate at least partly in said antechamber (130) having a volume that is in a ratio with the diges- ter vessel volume less than one to one hundred; said first stage means including pumping means (134); said pumping means (134) including first means for enabling said pumping means to pump substrate from said antechamber and return it to the antechamber while heating and mixing the substrate to a temperature of between fifteen degrees centigrade and seventy degrees centigrade; and said pumping means including second means for enabl- ing said pumping means to pump said substrate from said first stage means into said digester vessel after the temperature of the substrate has been increased and it has been mixed in said first stage means.
444463
Ronnow Peter
Thomsen Ove
Biosystem E. Aktiebolag
Gowling Lafleur Henderson Llp
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