Biosolids digester and process for biosolids production
AssigneeDVO Licensing, Inc.
InventorStephen W. Dvorak
Life of this patent
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Abstract
The invention relates to methods and apparatuses for producing Class A biosolids. In yet another embodiment, the invention relates to a method comprising digesting waste material by anaerobic digestion, and yielding Class A biosolids. In still yet another embodiment, the invention relates to a system for anaerobic digestion of waste material to produce Class A biosolids. In still yet another embodiment, the invention relates to a system for anaerobic digestion of waste material comprising a mixing chamber, a digester, a heating pit, and an effluent pit.
Claims19
A waste processing system comprising:
- a closed container comprising an anaerobic digester with a first passage and a second passage separated by a center wall, wherein the digester has outside walls, and further wherein the center wall and outside walls are substantially planar and vertical;
- and a heating pit that is adjacent to the anaerobic digester and shares a wall with the anaerobic digester, wherein the heating pit comprises a first heating device with heating pipes.
A waste processing system comprising:
- a closed container comprising an anaerobic digester with a first passage and a second passage separated by a center wall, wherein the digester has outside walls, and further wherein the center wall and outside walls are substantially planar and vertical;
- a heating pit that is adjacent to the anaerobic digester and shares a common wall with the anaerobic digester, wherein the heating pit comprises a first heating device to move waste material in a cork-screw-like fashion;
- and an effluent pit that is adjacent to and shares a common wall with the heating pit, and wherein the effluent pit comprises heating racks to capture excess heat.
A waste processing system comprising:
- a closed container comprising an anaerobic digester including a mixing chamber, wherein said mixing chamber comprises heating coils that can heat at least to 100° F.;
- and a methanogenic chamber for digesting the waste material;
- a heating pit that is adjacent to and shares a common wall with the methanogenic chamber, wherein the heating pit comprises a weir wall for plug flowing the waste material from the methanogenic chamber, and further wherein the waste material is heated to a temperature from 140° F. to 180° F. in the heating pit;
- and an effluent pit that is adjacent to the heating pit, wherein the effluent pit comprises heating racks for capturing excess heat from the waste material.
Dependencies are inferred from the claim text.