Patent ID: 11883780
Assignee: CALIFORNIA BIOENERGY LLC
Field: Chemical engineering (Chemistry)
Classification: CPC B  C  A  G  H  Y | IPC A  B  C  G  H

Claim 11:
12. A biogas collection, purification and delivery system comprising:
a plurality of remote sources of biogas from digesters of organic animal waste, the plurality of biogas sources each having a flexible roof, and each configured either
(a) with sensors to detect an availability of biogas at the respective ones of the plurality of remote sources and transmitters to transmit data about availability to a controller or
(b) to permit an estimation of biogas availability by human inspection;
a biogas compressor at each of the plurality of remote sources configured to controlledly compress biogas into a network of conduits configured to convey biogas from the plurality of sources of biogas;
a central processing facility controlledly receiving biogas via a biogas feed compressor from the plurality of sources of biogas and processing the biogas into biomethane, the central processing facility having:
a biogas hydrogen sulfide removal stage;
an activated carbon scrubber;
a membrane-based carbon dioxide removal stage;
a cooler positioned between the activated carbon scrubber and the membrane-based carbon dioxide removal stage, wherein the cooler is configured to lower a temperature of the biogas; and
a biomethane gas compressor configured to controlledly compress the biomethane;
wherein a central controller is positioned downstream from the membrane-based carbon dioxide removal stage and configured to control the biogas compressors at each of the plurality of remote sources, to control the biogas feed compressor of the central processing facility, and to control the biomethane gas compressor.