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US7632415: Apparatus and methods for water treatment


Filing Information

Inventor(s) Bruce E. Rittmann · Robert Nerenberg · César I. Torres ·
Assignee(s) Northwestern University ·
Attorney/Agent(s) Reinhart Boerner Van Deuren s.c. ·
Primary Examiner Chester T Barry ·
Application Number US12025953
Filing date 02/05/2008
Issue date 12/15/2009
Predicted expiration date 06/25/2024
U.S. Classifications 210/767  · 210/500.23  ·
International Classifications C02F142  ·
Kind CodeB1
Related U.S. Application DataThis application is a continuation of and claims priority benefit from application Ser. No. 10/876,745 filed on Jun. 25, 2004, now U.S. Pat. No. 7,338,597 which is incorporated herein by reference in its entirety.
21 Claims, 6 Drawings


An apparatus and method for treatment of water borne oxidized contaminants, using hydrogen as an electron donor for denitrification and reduction of other oxidized contaminants. Preliminary results reported here show that a biofilm of autotrophic denitrifiers accumulates rapidly in the wastewater setting, the MBfR can drive NO3− concentrations below 1 mgN/L, and the H2 pressure controls the NO3− flux.

Independent Claims | See all claims (21)

  1. 1. An apparatus, comprising: a support grid having a plurality of openings extending through the grid; a plurality of hydrogen permeable hollow fiber membrane components, each said membrane component having a first end, a second end, and a passage; wherein the first ends of at least a portion of the plurality of membrane components are coupled to a first of the plurality of openings and extend therethrough; and an inlet component for coupling said plurality of membrane components to a hydrogen source.

References Cited

U.S. Patent Documents

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US5332498* Transfair Corporation Rogut Jul 1994
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US5695634* Solvay Deutschland GmbH Neuenfeldt et al. Dec 1997
US5796799* Shinko Pantec Co., Ltd. Kobayashi et al. Aug 1998
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US6800207 Jay V. Kraft Holt et al. Oct 2004
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US20050148748* Terumo Kabushiki Kaisha Tanaka et al. Jul 2005
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* cited by examiner

Other Publications

Cowman, J; Torres, C; and Rittmann, B; Total Nitrogen Removal in an Aerobic and Anoxic Membrane Biofilm Reactor System; Environmental Engineering and Science Program, Northwestern University, Evanston, Illinois, Apr. 27, 2004.
Rittmann, B; Nerenberg, R; Stinson, B; Katehis, D; Leong, E; and Anderson, J; Hydrogen-Based Membrane Biolfilm Reactor for Wastewater Treatment; Northwestern University, Departmnt of Civil and Environmental Engineering, Evanston, Illinois.
Nerenberg, R; Rittmann, G; Gillogly, T; Lehman, GE; and Adham, SS; Perchlorate Reduction Using a Hollow-Fiber Membrane Biofilm Reactor; Kinetics, Microbial Ecology, and Pilot-Scale Studies; Northwestern University, Evanston, Illinois.
Nerenberg, R; Rittmann, B; and Najm, I; Perchlorate Reduction in a Hydrogen-Based Membrane-Biofilm Reactor; Journal AWWA, 94:11, Nov. 2002.
Lee, KC; and Rittmann, B; Applying a novel autohydrogenotrophic hollow-fiber membrane biofilm reactor for denitrification of drinking water; Water Research 36, 2002, 2040-2052.
Lee, KC; and Rittmann, B; Effects of pH and precipitation on autohydrogenotrophic denitrification using the hollow-fiber membrane-biofilm reactor; Water Research 37, 2003, 1551-1556.
Lee, KC; and Rittmann, B; A novel hollow-fibre membrane biofilm reactor for autohydrogenotrophic denitrification of drinking water; Water Science and Technology, vol. 41, No. 4-5, 219-226, 2000.

Referenced By

Document NumberAssigneeInventorsIssue/Pub Date
US7910009 Northwestern University Bruce E. Rittmann et al. Mar 2011

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