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US 2014/0178281 A1Published application
Methods and systems for recovering phosphorus from wastewater including digestate recycle
AssigneeMultiform Harvest Inc.
InventorKeith E. Bowers
Life of this patent
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Abstract
Methods and systems for removal and recovery of phosphorus from wastewater and producing inorganic phosphorus complexes including digestate recycle.
Claims24
A method for treating wastewater and producing inorganic phosphorus, comprising:
- (a) inducing a mixture of microorganisms containing phosphorus and magnesium to release phosphorus and magnesium to provide a treated mixture that includes phosphorus and magnesium;
- (b) subjecting the treated mixture to solids separation to provide a phosphorus- and magnesium-reduced mixture and an ammonia-containing, phosphorus- and magnesium-rich liquid;
- (c) conducting the ammonia-containing, phosphorus- and magnesium-rich liquid to an inorganic phosphorus reactor to provide inorganic phosphorus;
- (d) anaerobically treating the phosphorus- and magnesium-reduced mixture to provide an ammonia-rich, phosphorus- and magnesium-reduced product;
- and
- (e) conducting at least a portion of the ammonia-rich, phosphorus- and magnesium-reduced product to the treated mixture prior to solids separation in step (b).
3 more elements
A method for treating wastewater and producing inorganic phosphorus, comprising:
- (a) inducing a mixture of microorganisms containing phosphorus and magnesium to release phosphorus and magnesium to provide a treated mixture that includes phosphorus and magnesium;
- (b) subjecting the treated mixture to solids separation to provide a phosphorus- and magnesium-reduced mixture and an ammonia-containing, phosphorus- and magnesium-rich liquid;
- (c) conducting the ammonia-containing, phosphorus- and magnesium-rich liquid to an inorganic phosphorus reactor to provide inorganic phosphorus;
- (d) anaerobically treating the phosphorus- and magnesium-reduced mixture to provide an ammonia-rich, phosphorus- and magnesium-reduced mixture;
- and
- (e) separating the ammonia-rich, phosphorus- and magnesium-reduced mixture to provide biosolids and an ammonia-rich, phosphorus- and magnesium-reduced liquid;
- and
- (f) conducting the ammonia-rich, phosphorus- and magnesium-reduced liquid to the treated mixture prior to solids separation in step (b).
5 more elements
A method for treating wastewater and producing inorganic phosphorus, comprising:
- (a) inducing a mixture of microorganisms containing phosphorus and magnesium to release phosphorus and magnesium to provide a treated mixture that includes phosphorus and magnesium;
- (b) subjecting the treated mixture to solids separation to provide a phosphorus- and magnesium-reduced mixture and an ammonia-containing, phosphorus- and magnesium-rich liquid;
- (c) conducting the ammonia-containing, phosphorus- and magnesium-rich liquid to an inorganic phosphorus reactor to provide inorganic phosphorus;
- (d) anaerobically treating the phosphorus- and magnesium-reduced mixture to provide an ammonia-rich, phosphorus- and magnesium-reduced mixture;
- (e) separating the ammonia-rich, phosphorus- and magnesium-reduced mixture to provide biosolids and an ammonia-rich, phosphorus- and magnesium-reduced liquid;
- (f) conducting at least a first portion the ammonia-rich, phosphorus- and magnesium-reduced liquid to the treated mixture prior to solids separation in step (b);
- and
- (g) optionally conducting at least a second portion of the ammonia-rich, phosphorus- and magnesium-reduced liquid to a second inorganic phosphorus reactor to provide inorganic phosphorus.
5 more elements
A method for treating wastewater and producing inorganic phosphorus, comprising:
- (a) inducing a mixture of microorganisms containing phosphorus and magnesium to release phosphorus and magnesium to provide a treated mixture that includes phosphorus and magnesium;
- (b) subjecting the treated mixture to solids separation to provide a phosphorus- and magnesium-reduced mixture and an ammonia-containing, phosphorus- and magnesium-rich liquid;
- (c) conducting the ammonia-containing, phosphorus- and magnesium-rich liquid to a first inorganic phosphorus reactor to provide inorganic phosphorus;
- (d) anaerobically treating the phosphorus- and magnesium-reduced mixture to provide an ammonia-rich, phosphorus- and magnesium-reduced mixture;
- (e) conducting at least a first portion of the ammonia-rich, phosphorus- and magnesium-reduced mixture to the treated mixture prior to solids separation in step (b);
- (f) separating at least a second portion of the ammonia-rich, phosphorus- and magnesium-reduced mixture to provide biosolids and an ammonia-rich, phosphorus- and magnesium-reduced liquid;
- and
- (g) optionally conducting the ammonia-rich, phosphorus- and magnesium-reduced liquid to a second inorganic phosphorus reactor to provide inorganic phosphorus.
5 more elements
A system for producing inorganic phosphorus from wastewater, comprising:
- (a) a first conduit for introducing a material into a first solids separator;
- (b) a first solids separator for separating the material into a first liquid and a first mixture;
- (c) an inorganic phosphorus reactor for making inorganic phosphorus;
- (d) a second conduit intermediate the first solids separator and the inorganic phosphorus reactor for conducting the first liquid from the first solids separator to the inorganic phosphorus reactor;
- (e) a digester for anaerobically treating the first mixture to provide a second mixture;
- (f) a third conduit intermediate the first solids separator and the digester for conducting the first mixture from the first solids separator to the digester;
- (g) a second solids separator for separating the second mixture into a second liquid and biosolids;
- (h) a fourth conduit intermediate the digester and the second solids separator for conducting the second mixture from the digester to the second solids separator;
- and
- (i) a fifth conduit intermediate the second solids separator and the first conduit for conducting the second liquid to the first conduit to combine the second liquid with the material.
7 more elements
A system for producing inorganic phosphorus from wastewater, comprising:
- (a) a first conduit for introducing a material into a first solids separator;
- (b) a first solids separator for separating the material into a first liquid and a first mixture;
- (c) a first inorganic phosphorus reactor for making inorganic phosphorus;
- (d) a second conduit intermediate the first solids separator and the first inorganic phosphorus reactor for conducting the first liquid from the first solids separator to the first inorganic phosphorus reactor;
- (e) a digester for anaerobically treating the first mixture to provide a second mixture;
- (f) a third conduit intermediate the first solids separator and the digester for conducting the first mixture from the first solids separator to the digester;
- (g) a second solids separator for separating the second mixture into a second liquid and biosolids;
- (h) a fourth conduit intermediate the digester and the second solids separator for conducting the second mixture from the digester to the second solids separator;
- (i) a second inorganic phosphorus reactor for making inorganic phosphorus;
- (j) a fifth conduit intermediate the second solids separator and the first conduit for conducting a first portion of the second liquid from the second solids separator to the first conduit to combine the second liquid with the material;
- and
- (k) a sixth conduit intermediate the second solids separator and the second inorganic phosphorus reactor for conducting a second portion of the second liquid to the second inorganic phosphorus reactor.
9 more elements
A system for producing inorganic phosphorus from wastewater, comprising:
- (a) a first conduit for introducing a material into a first solids separator;
- (b) a first solids separator for separating the material into a first liquid and a first mixture;
- (c) a first inorganic phosphorus reactor for making inorganic phosphorus;
- (d) a second conduit intermediate the first solids separator and the first inorganic phosphorus reactor for conducting the first liquid from the first solids separator to the first inorganic phosphorus reactor;
- (e) a digester for anaerobically treating the first mixture to provide a second mixture;
- (f) a third conduit intermediate the first solids separator and the digester for conducting the first mixture from the first solids separator to the digester;
- (g) a fourth conduit intermediate the digester and the first conduit for conducting a first portion of the second mixture from the digester to the first conduit to combine the second mixture with the material;
- (h) a second solids separator for separating a second portion of the second mixture into a second liquid and biosolids;
- (i) a fifth conduit intermediate the digester and the second solids separator for conducting the second portion of the second mixture from the digester to the second solids separator;
- (j) a second inorganic phosphorus reactor for making inorganic phosphorus;
- and
- (k) a sixth conduit intermediate the second solids separator and the second inorganic phosphorus reactor for conducting the second liquid to the second inorganic reactor.
9 more elements
Dependencies are inferred from the claim text.