Patents by Inventor Keith E. Bowers

Keith E. Bowers has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Methods and systems for recovering phosphorus from wastewater including digestate recycle
    Patent number: 11091368
    Abstract: Methods and systems for removal and recovery of phosphorus from wastewater and producing inorganic phosphorus complexes including digestate recycle.
    Type: Grant
    Filed: January 24, 2019
    Date of Patent: August 17, 2021
    Assignee: Ostara Nutrient Recovery Technologies Inc.
    Inventor: Keith E. Bowers
  • METHODS AND SYSTEMS FOR RECOVERING PHOSPHORUS FROM WASTEWATER INCLUDING DIGESTATE RECYCLE
    Publication number: 20190225495
    Abstract: Methods and systems for removal and recovery of phosphorus from wastewater and producing inorganic phosphorus complexes including digestate recycle.
    Type: Application
    Filed: January 24, 2019
    Publication date: July 25, 2019
    Applicant: Multiform Harvest Inc.
    Inventor: Keith E. Bowers
  • Methods and systems for recovering phosphorus from wastewater including digestate recycle
    Patent number: 10189711
    Abstract: Methods and systems for removal and recovery of phosphorus from wastewater and producing inorganic phosphorus complexes including digestate recycle.
    Type: Grant
    Filed: August 30, 2011
    Date of Patent: January 29, 2019
    Assignee: Multiform Harvest Inc.
    Inventor: Keith E. Bowers
  • Methods and compositions for chemical drying and producing struvite
    Patent number: 10099926
    Abstract: Methods and compositions for chemical drying and for producing struvite.
    Type: Grant
    Filed: May 9, 2016
    Date of Patent: October 16, 2018
    Assignee: Multiform Harvest Inc.
    Inventor: Keith E. Bowers
  • METHODS AND COMPOSITIONS FOR CHEMICAL DRYING AND PRODUCING STRUVITE
    Publication number: 20160318763
    Abstract: Methods and compositions for chemical drying and for producing struvite.
    Type: Application
    Filed: May 9, 2016
    Publication date: November 3, 2016
    Applicant: Multiform Harvest Inc.
    Inventor: Keith E. Bowers
  • Methods and compositions for chemical drying and producing struvite
    Patent number: 9334166
    Abstract: Methods and compositions for chemical drying and for producing struvite.
    Type: Grant
    Filed: February 3, 2012
    Date of Patent: May 10, 2016
    Assignee: Multiform Harvest Inc.
    Inventor: Keith E. Bowers
  • PROCESS AND SYSTEM FOR RECOVERING PHOSPHORUS FROM WASTEWATER
    Publication number: 20140349365
    Abstract: Methods and systems for recovery of phosphorus from wastewater and producing inorganic phosphorus complexes.
    Type: Application
    Filed: June 4, 2014
    Publication date: November 27, 2014
    Applicant: MULTIFORM HARVEST INC.
    Inventor: Keith E. Bowers
  • METHODS AND SYSTEMS FOR RECOVERING PHOSPHORUS FROM WASTEWATER INCLUDING DIGESTATE RECYCLE
    Publication number: 20140178281
    Abstract: Methods and systems for removal and recovery of phosphorus from wastewater and producing inorganic phosphorus complexes including digestate recycle.
    Type: Application
    Filed: August 30, 2011
    Publication date: June 26, 2014
    Inventor: Keith E. Bowers
  • METHODS AND COMPOSITIONS FOR CHEMICAL DRYING AND PRODUCING STRUVITE
    Publication number: 20140161704
    Abstract: Methods and compositions for chemical drying and for producing struvite.
    Type: Application
    Filed: February 3, 2012
    Publication date: June 12, 2014
    Applicant: Multiform Harvest Inc.
    Inventor: Keith E. Bowers
  • Process and system for recovering phosphorus from wastewater
    Patent number: 8747672
    Abstract: Methods and systems for recovery of phosphorus from wastewater and producing inorganic phosphorus complexes.
    Type: Grant
    Filed: November 13, 2012
    Date of Patent: June 10, 2014
    Assignee: Multiform Harvest Inc.
    Inventor: Keith E. Bowers
  • METHODS AND SYSTEMS FOR RECOVERING PHOSPHORUS FROM WASTEWATER WITH ENHANCED REMOVAL OF PHOSPHORUS FROM BIOSOLIDS
    Publication number: 20140147910
    Abstract: Methods and systems for removal and recovery of phosphorus from wastewater and producing inorganic phosphorus complexes with enhanced removal of phosphorus from biosolids.
    Type: Application
    Filed: August 30, 2011
    Publication date: May 29, 2014
    Inventor: Keith E. Bowers
  • METHOD FOR INHIBITING FLOCCULATION IN WASTEWATER TREATMENT
    Publication number: 20120318745
    Abstract: Methods for inhibiting, preventing, and disrupting flocculations in wastewater treatment streams.
    Type: Application
    Filed: June 18, 2012
    Publication date: December 20, 2012
    Applicant: MULTIFORM HARVEST INC.
    Inventor: Keith E. Bowers
  • Compositions and methods for wastewater treatment
    Patent number: 8158089
    Abstract: Particular aspects provide a method for recovering phosphate, comprising: obtaining an effluent or wastewater, etc. having calcium-sequestered phosphate; adding to the effluent or wastewater a calcium chelating or sequestration agent suitable to chelate or sequester Ca++ ions from the calcium-sequestered phosphate to facilitate release of phosphate from the calcium-sequestered phosphate; transferring, facilitated by said Ca++ ion capture and in the presence of sufficient concentrations of NH4+ and Mg2 ions, of the phosphate into struvite (magnesium ammonium phosphate hexahydrate or MgNH4PO4.6H2O), or hydrated magnesium ammonium complex of phosphate; and recovering the struvite, or the formed hydrated magnesium ammonium complex. Preferably, the method further comprises acidification of the effluent or wastewater to facilitate release of Ca++ ions from the calcium-sequestered phosphate and chelation of sequestration of the Ca++ ions by the calcium chelating or sequestration agent.
    Type: Grant
    Filed: July 14, 2008
    Date of Patent: April 17, 2012
    Assignees: Washington State University Research Foundation, Multiform Harvest, Inc.
    Inventors: Tianxi Zhang, Keith E. Bowers, Joseph H. Harrison, Shulin Chen
  • COMPOSITIONS AND METHODS FOR WASTEWATER TREATMENT
    Publication number: 20090013742
    Abstract: Particular aspects provide a method for recovering phosphate, comprising: obtaining an effluent or wastewater, etc. having calcium-sequestered phosphate; adding to the effluent or wastewater a calcium chelating or sequestration agent suitable to chelate or sequester Ca++ ions from the calcium-sequestered phosphate to facilitate release of phosphate from the calcium-sequestered phosphate; transferring, facilitated by said Ca++ ion capture and in the presence of sufficient concentrations of NH4+ and Mg2 ions, of the phosphate into struvite (magnesium ammonium phosphate hexahydrate or MgNH4PO4.6H2O), or hydrated magnesium ammonium complex of phosphate; and recovering the struvite, or the formed hydrated magnesium ammonium complex. Preferably, the method further comprises acidification of the effluent or wastewater to facilitate release of Ca++ ions from the calcium-sequestered phosphate and chelation of sequestration of the Ca++ ions by the calcium chelating or sequestration agent.
    Type: Application
    Filed: July 14, 2008
    Publication date: January 15, 2009
    Applicants: Washington State University Research Foundation, Multiform Harvest, Inc.
    Inventors: Tianxi Zhang, Keith E. Bowers, Joseph H. Harrison, Shulin Chen
  • Method for removing phosphorus from waste lagoon effluent
    Patent number: 7005072
    Abstract: An apparatus and method for removing phosphorus from a wastewater effluent stream from a hog waste lagoon. The wastewater effluent is introduced to the bottom of an inverted cone-shaped continuous crystallizer including a fluidized bed of struvite therein. An effective amount of ammonia is introduced to the wastewater effluent at the bottom of the crystallizer to elevate the pH of wastewater effluent a predetermined amount. An effective amount of magnesium is also introduced to the wastewater effluent at the bottom of the crystallizer. The composition adjusted wastewater effluent is then continuously passed upwardly through the fluidized bed of struvite to reduce the total phosphorus content of the wastewater effluent a predetermined amount of up to about 80% or more. The treated wastewater effluent stream is removed from the top of the crystallizer, and struvite crystals that grow large enough to sink from the bottom of the crystallizer are periodically removed from a collection chamber therebeneath.
    Type: Grant
    Filed: July 22, 2005
    Date of Patent: February 28, 2006
    Assignee: North Carolina State University
    Inventors: Keith E. Bowers, Philip W. Westerman
  • Apparatus for removing phosphorus from waste lagoon effluent
    Patent number: 6994782
    Abstract: An apparatus and method for removing phosphorus from a wastewater effluent stream from a hog waste lagoon. The wastewater effluent is introduced to the bottom of an inverted cone-shaped continuous crystallizer including a fluidized bed of struvite therein. An effective amount of ammonia is introduced to the wastewater effluent at the bottom of the crystallizer to elevate the pH of wastewater effluent a predetermined amount. An effective amount of magnesium is also introduced to the wastewater effluent at the bottom of the crystallizer. The composition adjusted wastewater effluent is then continuously passed upwardly through the fluidized bed of struvite to reduce the total phosphorus content of the wastewater effluent a predetermined amount of up to about 80% or more. The treated wastewater effluent stream is removed from the top of the crystallizer, and struvite crystals that grow large enough to sink from the bottom of the crystallizer are periodically removed from a collection chamber therebeneath.
    Type: Grant
    Filed: September 9, 2003
    Date of Patent: February 7, 2006
    Assignee: North Carolina State University
    Inventors: Keith E. Bowers, Philip W. Westerman