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Title: Methods for producing hydrogen (BI) sulfide and/or removing metals

Abstract

The present invention is a process wherein sulfide production by bacteria is efficiently turned on and off, using pH adjustment. The adjustment of pH impacts sulfide production by bacteria by altering the relative amounts of H.sub.2 S and HS-- in solution and thereby control the inhibition of the bacterial metabolism that produces sulfide. This process can be used to make a bioreactor produce sulfide "on-demand" so that the production of sulfide can be matched to its use as a metal precipitation reagent. The present invention is of significance because it enables the use of a biological reactor, a cost effective sulfide production system, by making the biological reactor produce hydrogen sulfide "on demand", and therefore responsive to production schedules, waste stream generation rate, and health and safety requirements/goals.

Inventors:
 [1];  [2];  [3]
  1. Richland, WA
  2. Pullman, WA
  3. Kennewick, WA
Issue Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
874431
Patent Number(s):
6387669
Assignee:
Battelle Memorial Institute (Richland, WA)
Patent Classifications (CPCs):
C - CHEMISTRY C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE C02F - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01G - COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
DOE Contract Number:  
AC06-76RL01830
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
methods; producing; hydrogen; sulfide; andor; removing; metals; process; production; bacteria; efficiently; ph; adjustment; impacts; altering; amounts; hsub2; hs-; solution; control; inhibition; bacterial; metabolism; produces; bioreactor; produce; on-demand; matched; metal; precipitation; reagent; significance; enables; biological; reactor; cost; effective; demand; responsive; schedules; waste; stream; generation; rate; health; safety; requirementsgoals; hydrogen sulfide; producing hydrogen; removing metal; sulfide production; /435/210/

Citation Formats

Truex, Michael J, Peyton, Brent M, and Toth, James J. Methods for producing hydrogen (BI) sulfide and/or removing metals. United States: N. p., 2002. Web.
Truex, Michael J, Peyton, Brent M, & Toth, James J. Methods for producing hydrogen (BI) sulfide and/or removing metals. United States.
Truex, Michael J, Peyton, Brent M, and Toth, James J. Tue . "Methods for producing hydrogen (BI) sulfide and/or removing metals". United States. https://www.osti.gov/servlets/purl/874431.
@article{osti_874431,
title = {Methods for producing hydrogen (BI) sulfide and/or removing metals},
author = {Truex, Michael J and Peyton, Brent M and Toth, James J},
abstractNote = {The present invention is a process wherein sulfide production by bacteria is efficiently turned on and off, using pH adjustment. The adjustment of pH impacts sulfide production by bacteria by altering the relative amounts of H.sub.2 S and HS-- in solution and thereby control the inhibition of the bacterial metabolism that produces sulfide. This process can be used to make a bioreactor produce sulfide "on-demand" so that the production of sulfide can be matched to its use as a metal precipitation reagent. The present invention is of significance because it enables the use of a biological reactor, a cost effective sulfide production system, by making the biological reactor produce hydrogen sulfide "on demand", and therefore responsive to production schedules, waste stream generation rate, and health and safety requirements/goals.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2002},
month = {5}
}

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