Patent ID: 11891320
Assignee: TUCUMCARI BIO-ENERGY CORPORATION
Field: Environmental technology (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. Apparatus comprising a membrane covered anaerobic digestor pond containing digesting slurry kept at a temperature different and more constant than an ambient air temperature with a polymer membrane liner a depression in the earth with a polymer membrane cover that absorbs sunlight, wherein a circulation of contained digesting slurry within a volume between the polymer membrane liner and the polymer membrane cover that is in contact with digesting slurry and the polymer cover membrane can actuate to be a sloped contact with the digesting slurry by raising or lowering the pressure of a space between the membrane cover and the membrane liner and/or by changing a weight or buoyancy of tubes with additions or removal of fluids from tubes or bladders in contact with the membrane cover that product gas bubbles rise under a sloped membrane cover propels fluid circulation of digesting slurry liquid and therein transfers heat by convection between the membrane cover and the digesting slurry liquid and collection of gas from digesting slurry.