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US 10,246,359 B2Granted
System and method for treating wastewater
AssigneeNew Environmental Engineering, Inc.
InventorJohn Stewart Lang
Life of this patent
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Abstract
The invention comprises an activated sludge treatment system and process that aerates wastewater undergoing treatment using venturis.
Claims13
An activated sludge treatment system for treating wastewater, comprising:
- a) one or more primary treatment tanks adapted to settle solids out of polluted influent;
- b) at least one flow equalization channel;
- c) one or more secondary treatment tanks adapted to digest organic materials in primary-treated wastewater with aerobic micro-organisms, comprising:
- (i) a liquid distribution manifold connected to one or more venturis suspended within the one or more secondary treatment tanks, wherein said one or more venturis are adapted to discharge an air/liquid mixture into said one or more secondary treatment tanks, and
- (ii) an air distribution manifold connected to the one or more venturis suspended within the one or more secondary treatment tanks;
- d) at least one collection channel connected to the one or more secondary treatment tanks and adapted to deliver secondary-treated wastewater to one or more sedimentation tanks;
- e) wherein the one or more sedimentation tanks are connected directly or indirectly to one or more return activated sludge pipelines;
- f) said one or more return activated sludge pipelines being adapted to carry return activated sludge to the one or more secondary treatment tanks;
- g) one or more return activated sludge pumps adapted to pump return activated sludge through the one or more return activated sludge pipelines;
- h) one or more secondary supernatant discharge lines connected to the one or more sedimentation tanks;
- i) one or more secondary supernatant pumps adapted to pump secondary supernatant from the one or more sedimentation tanks through the one or more secondary supernatant discharge lines to the liquid distribution manifold;
- and
- j) one or more air compressors adapted to pump air to the air distribution manifold.
10 more elements
A process for treating wastewater, comprising:
- a) conveying polluted influent to a primary treatment tank where solids are settled out of the polluted influent to create primary-treated wastewater;
- b) conveying the primary-treated wastewater to a flow equalization channel connected to a secondary treatment tank where aerobic micro-organisms digest organic materials in the primary-treated wastewater to create secondary-treated wastewater, wherein said secondary treatment tank comprises:
- (i) one or more liquid manifolds connected to one or more venturis suspended within the secondary treatment tank and (ii) an air distribution manifold connected to the one or more venturis suspended within the secondary treatment tank;
- c) conveying the secondary-treated wastewater from the secondary treatment tank through a collection channel to a sedimentation tank where solids are settled out of the secondary-treated wastewater to create secondary supernatant and activated sludge;
- d) conveying a portion of the activated sludge from the sedimentation tank through a return activated sludge pipeline to the flow equalization channel using a return activated sludge pump;
- e) conveying a portion of the secondary supernatant from the sedimentation tank through a secondary supernatant discharge line to the one or more liquid manifolds and on to the one or more venturis using a secondary supernatant pump;
- f) pumping air from one or more air compressors through the one or more air distribution manifolds to the one or more venturis;
- g) mixing the secondary supernatant with air in the one or more venturis to create an air/supernatant mixture;
- h) expelling the air/supernatant mixture from the one or more venturis into the secondary treatment tank to aerate wastewater undergoing treatment.
6 more elements
An activated sludge treatment system for treating wastewater, comprising:
- a) one or more primary treatment tanks adapted to settle solids out of polluted influent;
- b) at least one flow equalization channel fluidically connecting the one or more primary treatment tanks to one or more secondary treatment tanks that are adapted to digest organic materials in primary-treated wastewater with aerobic micro-organisms;
- c) the one or more secondary treatment tanks comprising:
- (i) a liquid distribution manifold connected to one or more venturis suspended within the one or more secondary treatment tanks, wherein said one or more venturis are adapted to discharge an air/liquid mixture into said one or more secondary treatment tanks, and
- (ii) an air distribution manifold connected to the one or more venturis suspended within the one or more secondary treatment tanks;
- d) at least one collection channel connected to the one or more secondary treatment tanks and adapted to deliver secondary-treated wastewater to one or more sedimentation tanks;
- e) wherein the one or more sedimentation tanks are connected directly or indirectly to one or more return activated sludge pipelines;
- f) the one or more return activated sludge pipelines being adapted to carry return activated sludge to the one or more secondary treatment tanks;
- g) one or more return activated sludge pumps adapted to pump return activated sludge through the one or more return activated sludge pipelines;
- h) one or more secondary mixed liquor pumps adapted to pump mixed liquor from the one or more secondary treatment tanks through one or more mixed liquor lines to the liquid distribution manifold;
- and
- j) one or more air compressors adapted to pump air to the air distribution manifold.
9 more elements
Dependencies are inferred from the claim text.