Water and energy recovery system
AssigneeLIXIL Corporation
InventorsTate Rogers, Aaron Forbis-Stokes
Life of this patent
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Abstract
Systems and methods for wastewater treatment are described. In some embodiments, a wastewater treatment system may include a container configured to receive and store at least a portion of incoming wastewater during a digestion process that generates biogas and a biogas burner. The biogas burner may be arranged to receive and burn at least a portion of the biogas generated by the digestion process. The system may be configured to heat solids separated from the wastewater such that: (i) the solids separated from the wastewater are maintained at a temperature of at least 70° C. for at least 30 minutes; and/or (ii) a water content of the solids separated from the wastewater is less than 15% by mass.
Claims19
A wastewater treatment system, the wastewater treatment system comprising:
- a container configured to receive and store at least a portion of wastewater incoming to the container during a digestion process that generates biogas;
- a flexible biogas receptacle configured to receive and store at least a portion of the biogas generated by the digestion process;
- and
- a biogas burner, the biogas burner being arranged to receive and burn at least a portion of the biogas generated by the digestion process;
- wherein the flexible biogas receptacle is further configured to change in volume based on an amount of the biogas generated during the digestion process and an amount of the biogas burned by the biogas burner, and
- the wastewater treatment system is configured to heat, using the biogas burner, solids separated from the wastewater such that:
- (i) the solids separated from the wastewater are maintained at a temperature of at least 70° C. for at least 30 minutes;
- and/or (ii) a water content of the solids separated from the wastewater is less than 15% by mass.
A wastewater treatment system, the wastewater treatment system comprising:
- a container configured to receive and store at least a portion of wastewater incoming into the container during a digestion process that generates biogas;
- a biogas burner, the biogas burner being arranged to receive and burn at least a portion of the biogas generated by the digestion process;
- a heat treatment zone within the container;
- and
- a conveyor disposed at least partially within the container;
- wherein the conveyor is configured to move solids separated from the wastewater into the heat treatment zone,
- the heat treatment zone includes:
- a first inlet configured to receive the solids from the conveyor;
- a second inlet configured to receive heated air created from the biogas burner;
- a first outlet configured to discharge heated solids;
- and
- a second outlet configured to exhaust gas produced during heating;
- and
- the wastewater treatment system is configured to heat, using the biogas burner, the solids separated from the wastewater such that:
- (i) the solids separated from the wastewater are maintained at a temperature of at least 70° C. for at least 30 minutes;
- and/or (ii) a water content of the solids separated from the wastewater is less than 15% by mass.
Dependencies are inferred from the claim text.