Patent ID: 6855253
Filing Date: 2005-02-15
Classification: C02F,C12M,Y02E

Abstract:
1. An anaerobic digester for installation on an upwardly open containment vessel containing a body of organic waste material slurry comprising: a first cover made of gas permeable material conducive to bacterial colonization for installation on the surface of a body of organic waste material slurry in a containment vessel; at least one gas conveying duct installed on the top of the first cover when the first cover is installed on the surface of a body of organic waste material; a second cover made of gas impermeable material installed over the first cover and over the gas conveying duct forming a gas collection space with the first cover; the first and second covers having edges that are closed together in order to inhibit the escape of gas from between them; said duct having a plurality of ports for passage of gas from the gas collection space into the duct; blower means connected to the duct to move gas out of the duct to a remote location for storage or use.