Back to results
US 4,897,195 AGranted
System and process for anaerobic digestion of waste materials
OwnerStewart E. Ericksoninventor
Life of this patent
Estimating the term…
Abstract
The invention relates to a system and process for production of carbon dioxide, methane, and nitrogen rich fertilizers by anaerobic digestion of waste materials. The waste materials are digested in rotary digestion modules, and the chemical composition of the organic materials in the modules is monitored to determine the progress of the decomposition.
Claims10
A system for digestion of an organic waste slurry, comprising:
- a plurality of digestion modules, each having a waste inlet port, a gas discharge port, and means for agitating the waste contained within the digestion module in response to rotation of the module;
- means for filling the digestion modules with the organic waste slurry;
- rotation means for causing controlled rotation of the modules during the digestion process;
- means for maintaining the temperature of the digestion modules within a selected range;
- gas collection means operatively connected to each of the digestion modules for collecting gases produced in each of the digestion modules;
- and
- means for emptying the slurry from each module upon completion of digestion therein;
4 more elements
A system for the production of methane gas, carbon dioxide gas and fertilizer material by the anaerobic digestion of suitable organic materials comprising:
- a plurality of digestion modules;
- a filling means for filling the digestion modules with organic materials;
- an inclined planar surface for supporting the digestion modules;
- monitoring means for monitoring the contents of the digestion modules, adding materials to the modules, and extracting gases from the modules,
- movement control means for controlling movement of the digestion modules upon the inclined planar surface,
- extraction means for removing the digestion modules from the planar surface,
- emptying means for emptying the contents of the digestion modules,
- transporting means for transporting the digestion modules, and
- agitation means for agitating the contents of the modules as they move down the planar surface to promote the digestion process.
6 more elements
A process for digestion of organic waste materials, comprising the steps of:
- injecting the organic material into a tabular-shaped digestion module where the decomposition process occurs;
- agitating the organic material contained within the module by rotating the module to promote the decomposition process;
- monitoring the organic material contained in the module to determine chemical composition and progress of the decomposition process;
- adding water, liquid effluent and other substances as necessary to the contents of the module to promote efficient decomposition;
- extracting gases produced during decomposition from the module;
- and
- removing the remaining slurry when the decomposition process has reached a selected stage.
4 more elements
Dependencies are inferred from the claim text.