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Title: Microbial reduction of iron ore

Abstract

A process is provided for reducing iron ore by treatment with microorganisms which comprises forming an aqueous mixture of iron ore, microorganisms operable for reducing the ferric iron of the iron ore to ferrous iron, and a substrate operable as an energy source for the microbial reduction; and maintaining the aqueous mixture for a period of time and under conditions operable to effect the reduction of the ore. Preferably the microorganism is Pseudomonas sp. 200 and the reduction conducted anaerobically with a domestic wastewater as the substrate. An aqueous solution containing soluble ferrous iron can be separated from the reacted mixture, treated with a base to precipitate ferrous hydroxide which can then be recovered as a concentrated slurry. 11 figs.

Inventors:
; ;
Publication Date:
Research Org.:
California Institute of Technology (Pasadena, CA)
Sponsoring Org.:
USDOE
OSTI Identifier:
7269096
Patent Number(s):
US 4880740; A
Application Number:
PPN: US 6-661629
Assignee:
California Institute of Technology (Pasadena, CA) OAK; EDB-94-115971
DOE Contract Number:  
AS03-83ER13125; AM03-76SF00767
Resource Type:
Patent
Resource Relation:
Patent File Date: 17 Oct 1984
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; 63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.; IRON; BIODEGRADATION; PSEUDOMONAS; GROWTH; WASTE WATER; WASTE PROCESSING; TECHNOLOGY ASSESSMENT; BACTERIA; CHEMICAL REACTIONS; DECOMPOSITION; ELEMENTS; HYDROGEN COMPOUNDS; LIQUID WASTES; MANAGEMENT; METALS; MICROORGANISMS; OXYGEN COMPOUNDS; PROCESSING; TRANSITION ELEMENTS; WASTE MANAGEMENT; WASTES; WATER; 320303* - Energy Conservation, Consumption, & Utilization- Industrial & Agricultural Processes- Equipment & Processes; 560300 - Chemicals Metabolism & Toxicology

Citation Formats

Hoffmann, M.R., Arnold, R.G., and Stephanopoulos, G. Microbial reduction of iron ore. United States: N. p., 1989. Web.
Hoffmann, M.R., Arnold, R.G., & Stephanopoulos, G. Microbial reduction of iron ore. United States.
Hoffmann, M.R., Arnold, R.G., and Stephanopoulos, G. Tue . "Microbial reduction of iron ore". United States. doi:.
@article{osti_7269096,
title = {Microbial reduction of iron ore},
author = {Hoffmann, M.R. and Arnold, R.G. and Stephanopoulos, G.},
abstractNote = {A process is provided for reducing iron ore by treatment with microorganisms which comprises forming an aqueous mixture of iron ore, microorganisms operable for reducing the ferric iron of the iron ore to ferrous iron, and a substrate operable as an energy source for the microbial reduction; and maintaining the aqueous mixture for a period of time and under conditions operable to effect the reduction of the ore. Preferably the microorganism is Pseudomonas sp. 200 and the reduction conducted anaerobically with a domestic wastewater as the substrate. An aqueous solution containing soluble ferrous iron can be separated from the reacted mixture, treated with a base to precipitate ferrous hydroxide which can then be recovered as a concentrated slurry. 11 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Nov 14 00:00:00 EST 1989},
month = {Tue Nov 14 00:00:00 EST 1989}
}