WO2009050661A2 - Process for treating sulphate-containing effluent - Google Patents

Process for treating sulphate-containing effluent Download PDF

Info

Publication number
WO2009050661A2
WO2009050661A2 PCT/IB2008/054247 IB2008054247W WO2009050661A2 WO 2009050661 A2 WO2009050661 A2 WO 2009050661A2 IB 2008054247 W IB2008054247 W IB 2008054247W WO 2009050661 A2 WO2009050661 A2 WO 2009050661A2
Authority
WO
WIPO (PCT)
Prior art keywords
sulphate
effluent
bioreactor
methane
sulphide
Prior art date
Application number
PCT/IB2008/054247
Other languages
French (fr)
Other versions
WO2009050661A3 (en
Inventor
Neil Eric Ristow
Johannes Hendrikus Brand Joubert
Original Assignee
Water Research Commission
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Water Research Commission filed Critical Water Research Commission
Priority to AP2010005225A priority Critical patent/AP2926A/en
Priority to EP20080838715 priority patent/EP2217537A2/en
Publication of WO2009050661A2 publication Critical patent/WO2009050661A2/en
Publication of WO2009050661A3 publication Critical patent/WO2009050661A3/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/28—Anaerobic digestion processes
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/28—Anaerobic digestion processes
    • C02F3/282—Anaerobic digestion processes using anaerobic sequencing batch reactors
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
    • C02F3/345—Biological treatment of water, waste water, or sewage characterised by the microorganisms used for biological oxidation or reduction of sulfur compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/101—Sulfur compounds
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00—Technologies for the production of fuel of non-fossil origin
    • Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel

Definitions

  • This invention relates to a process for treating sulphate-containing effluent.
  • sulphate-reducing microorganisms are used to reduce sulphate to sulphide.
  • a metabolisable carbon source, sulphate-reducing microorganisms, and sulphate- containing effluent are placed in a reactor where the reduction takes place.
  • the sulphide produced through this reduction is precipitated out of solution using a heavy metal and removed in a separation stage.
  • Hydrogen sulphide in a gaseous form is also often produced during the reaction step and this collects in a head space above the reactor. It is known practice to purge the headspace using an inert gas. Owing to the make-up of the reaction mixture of the above and other methods, it has hitherto been accepted that the sulphate reduction and methanogenesis cannot take place at the same time.
  • a further disadvantage is that the known method does not allow for methanogenesis to occur in the reactor owing to the high level of sulphide, which inhibits methanogenesis, and the efficiency of the method is thus limited.
  • a process for treating sulphate-containing effluent in a bioreactor including the steps of:
  • the arrangement may be such that methane produced in the process forms bubbles in the effluent and the process may include the further step of removing the sulphide from the effluent by allowing the methane gas bubbles to transpire through the effluent, thus stripping the sulphide from the effluent.
  • the methane and stripped sulphide accumulates outside the effluent and the process includes the further step of separating the accumulated sulphide and methane.
  • the separated methane may be retranspired through the effluent.
  • the process may include the further step of transpiring carbon dioxide through the effluent.
  • the carbon dioxide may be added to the methane transpiring through the effluent.
  • the carbon dioxide may be sourced from a step downstream of the bioreactor and which produces carbon dioxide.
  • the sulphate-containing effluent contains more than 2.5g/l of sulphate on a mass per volume basis.
  • the carbon energy source may be selected from the group consisting of primary sewage sludge, dairy waste, molasses, food industry leftovers, coal and acetic acid.
  • a bioreaction system for treating sulphate-containing effluent including a bioreactor, the bioreactor containing :
  • the sulphate-containing effluent may be obtained from an industrial process, selected from the group including, but not limited to the tanning, mining and paper producing industrial processes.
  • the carbon energy source may be selected from the group including, but not limited to primary sewage sludge, dairy waste, molasses, food industry leftovers, coal and acetic acid.
  • the culture of sulphate-reducing microorganisms may be obtained from primary sewage sludge.
  • the culture of methane-producing microorganisms may be obtained from primary sewage sludge.
  • the bioreactor may be an anaerobic reactor.
  • the primary sewage sludge may act as a matrix for the culture of sulphate- reducing microorganisms; the culture of methane-producing organisms; the sulphate-containing effluent; and the metabolisable carbon energy source.
  • a bioreactor for treating sulphate-containing effluent including: - a bioreaction vessel for containing a reaction mixture including a culture of sulphate-reducing microorganisms, a culture of methane-producing organisms, sulphate-containing effluent, and a metabolisable carbon energy source;
  • the bioreaction vessel may be provided with at least one outlet for disposing of treated effluent formed in the bioreactor.
  • the bioreaction vessel may be in the form of an anaerobic container.
  • the bioreactor may have a separating means for separating the produced sulphide and methane.
  • the separated methane may be recirculated via the inlet for providing methane and carbon dioxide.
  • a bioreactor according to a preferred embodiment of the invention for the treatment of sulphate-containing effluent F, is generally designated by reference numeral 10.
  • the bioreactor 10 comprises an anaerobic bioreaction vessel 12 for containing the sulphate-containing effluent F; an inlet 14 for the sulphate-containing effluent F and a metabolisable carbon energy source E; an inlet 16 for methane and carbon dioxide; an outlet 18 for sulphide and methane; an outlet 20 for treated effluent; and an outlet 22 for waste.
  • a separating means 24 is provided in the outlet 18 for separating methane and sulphide.
  • the sulphate-reducing organisms and methane-producing organisms are provided by the metabolisable carbon energy source E and are contained in the vessel 12.
  • the flow of the sulphate-containing effluent F and metabolisable carbon energy source E which enter the vessel 12 via the inlet 14, is indicated by arrow A.
  • Methane and carbon dioxide are pumped into the vessel 12 via inlet 16 as indicated by arrow B.
  • the sulphate-reducing organisms reduce the sulphate contained in the effluent F to sulphide and the methane-producing organisms utilise the carbon energy source E to produce gaseous methane.
  • the gaseous methane so produced transpires upwardly through the sulphate containing- effluent F and strips gaseous sulphide from the effluent F.
  • the methane and the stripped sulphide gather in a headspace 32 above the sulphate-containing effluent F.
  • Sulphide and methane flows out of the vessel via outlet 18 as indicated by arrow G.
  • the sulphide and methane are separated by the separating means 24 provided in the outlet 18.
  • the sulphide is recovered from the gaseous phase via an outlet 30.
  • the separated methane is recirculated back into the vessel 12 in a recirculation pipe 28 as indicated by arrow H and re- enters the vessel 12 via inlet 16 as indicated by arrow I.
  • the flow of carbon dioxide, provided from a source 26 downstream of the bioreactor 10, is indicated by arrow I.
  • the carbon dioxide enters the vessel 12 through inlet 16 and is transpired upwards through the sulphate-containing effluent F.
  • the carbon dioxide also strips the gaseous sulphide from the effluent F.
  • the process has several advantages over conventional processes. For example, by introducing the metabolisable carbon energy source in an amount in excess of an amount that would be required for the biological reduction of sulphate to sulphide in the effluent, the concomitant occurrence of methanogenesis is achieved.
  • a further advantage is that the methane gas produced during methanogenesis strips the sulphide gas produced during sulphate reduction to obtain a relatively more efficient reduction of sulphate.
  • the sulphide gas is thus removed from the vessel 12 without inhibiting the further reduction of sulphate to sulphide.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Water Supply & Treatment (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Molecular Biology (AREA)
  • Physical Water Treatments (AREA)
  • Apparatus Associated With Microorganisms And Enzymes (AREA)
  • Micro-Organisms Or Cultivation Processes Thereof (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)

Abstract

A bioreaction system for treating sulphate-containing effluent, the system including a bioreactor, the bioreactor containing sulphate containing effluent; a metabolisable carbon energy source; a culture of sulphate-reducing microorganisms for reducing the sulphate in the effluent to sulphide; and a culture of methane-producing organisms for producing methane from the carbon energy source, wherein the arrangement is such that the metabolisable carbon energy source is present in the bioreactor in an amount in excess of that which would be required for the biological reduction of sulphate to sulphide in the effluent.

Description

PROCESS FOR TREATING SULPHATE-CONTAINING EFFLUENT
INTRODUCTION
This invention relates to a process for treating sulphate-containing effluent.
BACKGROUND TO THE INVENTION
Many industries produce effluent which contains sulphates. The conventional treatment of sulphate-containing effluent involves the reduction of the sulphate in the effluent to sulphide.
In a conventional biological method of treating sulphate-containing effluent, sulphate-reducing microorganisms are used to reduce sulphate to sulphide. A metabolisable carbon source, sulphate-reducing microorganisms, and sulphate- containing effluent are placed in a reactor where the reduction takes place.
According to one known embodiment, the sulphide produced through this reduction is precipitated out of solution using a heavy metal and removed in a separation stage. Hydrogen sulphide in a gaseous form is also often produced during the reaction step and this collects in a head space above the reactor. It is known practice to purge the headspace using an inert gas. Owing to the make-up of the reaction mixture of the above and other methods, it has hitherto been accepted that the sulphate reduction and methanogenesis cannot take place at the same time.
Another disadvantage of the known process is that the presence of sulphides in the reactor inhibits the further reduction of sulphates to sulphides and the sulphides produced must therefore be removed to allow the reaction to continue.
A further disadvantage is that the known method does not allow for methanogenesis to occur in the reactor owing to the high level of sulphide, which inhibits methanogenesis, and the efficiency of the method is thus limited.
OBJECT OF THE INVENTION
It is accordingly an object of the present invention to provide a process for treating sulphate-containing effluent with which the aforesaid disadvantages could be overcome or at least minimised.
SUMMARY OF THE INVENTION
According to a first aspect of the invention there is provided a process for treating sulphate-containing effluent in a bioreactor including the steps of:
- introducing the sulphate-containing effluent into the bioreactor;
- introducing a metabolisable carbon energy source into the bioreactor so that the metabolisable carbon energy source is present in an amount in excess of an amount that would be required for the biological reduction to sulphide of the sulphate in the effluent;
- reducing the sulphate in the effluent biologically to sulphide;
- simultaneously producing methane biologically from the carbon energy source; and
- removing the sulphide from the effluent.
The arrangement may be such that methane produced in the process forms bubbles in the effluent and the process may include the further step of removing the sulphide from the effluent by allowing the methane gas bubbles to transpire through the effluent, thus stripping the sulphide from the effluent.
Further, according to the invention, the methane and stripped sulphide accumulates outside the effluent and the process includes the further step of separating the accumulated sulphide and methane.
The separated methane may be retranspired through the effluent.
The process may include the further step of transpiring carbon dioxide through the effluent. The carbon dioxide may be added to the methane transpiring through the effluent. The carbon dioxide may be sourced from a step downstream of the bioreactor and which produces carbon dioxide.
Further, according to the invention, the sulphate-containing effluent contains more than 2.5g/l of sulphate on a mass per volume basis.
The carbon energy source may be selected from the group consisting of primary sewage sludge, dairy waste, molasses, food industry leftovers, coal and acetic acid.
According to a second aspect of the invention there is provided a bioreaction system for treating sulphate-containing effluent, the system including a bioreactor, the bioreactor containing :
- sulphate-containing effluent;
- a metabolisable carbon energy source;
- a culture of sulphate-reducing microorganisms for reducing the sulphate in the effluent to sulphide;
- a culture of methane-producing organisms for producing methane from the carbon energy source, the arrangement being such that the metabolisable carbon energy source is present in the bioreactor in an amount in excess of that which would be required for the biological reduction of sulphate to sulphide in the effluent. The sulphate-containing effluent may be obtained from an industrial process, selected from the group including, but not limited to the tanning, mining and paper producing industrial processes.
The carbon energy source may be selected from the group including, but not limited to primary sewage sludge, dairy waste, molasses, food industry leftovers, coal and acetic acid.
The culture of sulphate-reducing microorganisms may be obtained from primary sewage sludge.
The culture of methane-producing microorganisms may be obtained from primary sewage sludge.
The bioreactor may be an anaerobic reactor.
The primary sewage sludge may act as a matrix for the culture of sulphate- reducing microorganisms; the culture of methane-producing organisms; the sulphate-containing effluent; and the metabolisable carbon energy source.
According to a third aspect of the invention there is provided a bioreactor for treating sulphate-containing effluent, the bioreactor including: - a bioreaction vessel for containing a reaction mixture including a culture of sulphate-reducing microorganisms, a culture of methane-producing organisms, sulphate-containing effluent, and a metabolisable carbon energy source;
- an inlet for the sulphate-containing effluent and for the metabolisable carbon energy source;
- an inlet for methane and carbon dioxide; and
- at least one outlet for sulphide formed during the reduction of the sulphate-containing effluent and for methane formed during the methanogenesis.
The bioreaction vessel may be provided with at least one outlet for disposing of treated effluent formed in the bioreactor.
The bioreaction vessel may be in the form of an anaerobic container.
The bioreactor may have a separating means for separating the produced sulphide and methane.
The separated methane may be recirculated via the inlet for providing methane and carbon dioxide.
BRIEF DESCRIPTION OF THE DRAWING The invention will now be described further, by way of example only, with reference to the accompanying drawing which is a schematic representation of a process according to a preferred embodiment of the invention for treating sulphate-containing effluent.
DESCRIPTION OF A PREFERRED EMBODIMENT OF THE INVENTION
Referring to the drawing, a bioreactor, according to a preferred embodiment of the invention for the treatment of sulphate-containing effluent F, is generally designated by reference numeral 10.
The bioreactor 10 comprises an anaerobic bioreaction vessel 12 for containing the sulphate-containing effluent F; an inlet 14 for the sulphate-containing effluent F and a metabolisable carbon energy source E; an inlet 16 for methane and carbon dioxide; an outlet 18 for sulphide and methane; an outlet 20 for treated effluent; and an outlet 22 for waste.
A separating means 24 is provided in the outlet 18 for separating methane and sulphide.
The sulphate-reducing organisms and methane-producing organisms are provided by the metabolisable carbon energy source E and are contained in the vessel 12. In use the flow of the sulphate-containing effluent F and metabolisable carbon energy source E which enter the vessel 12 via the inlet 14, is indicated by arrow A. Methane and carbon dioxide are pumped into the vessel 12 via inlet 16 as indicated by arrow B. The sulphate-reducing organisms reduce the sulphate contained in the effluent F to sulphide and the methane-producing organisms utilise the carbon energy source E to produce gaseous methane. The gaseous methane so produced transpires upwardly through the sulphate containing- effluent F and strips gaseous sulphide from the effluent F. The methane and the stripped sulphide gather in a headspace 32 above the sulphate-containing effluent F. Sulphide and methane flows out of the vessel via outlet 18 as indicated by arrow G. The sulphide and methane are separated by the separating means 24 provided in the outlet 18. The sulphide is recovered from the gaseous phase via an outlet 30. The separated methane is recirculated back into the vessel 12 in a recirculation pipe 28 as indicated by arrow H and re- enters the vessel 12 via inlet 16 as indicated by arrow I. The flow of carbon dioxide, provided from a source 26 downstream of the bioreactor 10, is indicated by arrow I. The carbon dioxide enters the vessel 12 through inlet 16 and is transpired upwards through the sulphate-containing effluent F. The carbon dioxide also strips the gaseous sulphide from the effluent F.
It has been found that the process has several advantages over conventional processes. For example, by introducing the metabolisable carbon energy source in an amount in excess of an amount that would be required for the biological reduction of sulphate to sulphide in the effluent, the concomitant occurrence of methanogenesis is achieved.
A further advantage is that the methane gas produced during methanogenesis strips the sulphide gas produced during sulphate reduction to obtain a relatively more efficient reduction of sulphate.
The sulphide gas is thus removed from the vessel 12 without inhibiting the further reduction of sulphate to sulphide.
Moreover, the removal of sulphide has the result that methanogenesis is not inhibited.
It will be appreciated that variations in detail are possible with a process for treating sulphate-containing effluent in a bioreactor, a bioreaction system for treating sulphate-containing effluent and a bioreactor for treating sulphate- containing effluent according to the invention without departing from the scope of the appended claims.

Claims

1. A process for treating sulphate-containing effluent in a bioreactor including the steps of: introducing the sulphate-containing effluent into the bioreactor; introducing a metabolisable carbon energy source into the bioreactor; reducing the sulphate in the effluent biologically to sulphide; simultaneously producing methane biologically from the carbon energy source; and removing the sulphide from the effluent, wherein the arrangement is such that the metabolisable carbon energy source is present in an amount in excess of an amount that would be required for the biological reduction to sulphide of the sulphate in the effluent.
2. A process as claimed in claim 1 wherein methane is produced in the form of bubbles in the effluent.
3. A process as claimed in claim 2 including the further step of removing the sulphide from the effluent by allowing the methane gas bubbles to transpire through the effluent thus stripping the sulphide from the effluent.
4. A process as claimed in 3 wherein the methane and stripped sulphide accumulate outside the effluent.
5. A process as claimed in 4 which includes the further step of separating the accumulated sulphide and methane.
6. A process as claimed in claims 5 wherein the separated methane is retranspired through the effluent.
7. A process as claimed in any one of claims 3 to 6 including the further step of transpiring carbon dioxide through the effluent.
8. A process as claimed in claim 7 wherein the carbon dioxide is added to the methane transpiring through the effluent.
9. A process as claimed in either one of claim 8 wherein the carbon dioxide is sourced from a step downstream of the bioreactor.
10. A process according to any one of the preceding claims wherein the sulphide-containing effluent contains more than 2.5 g/l of sulphate on a mass per volume basis.
11. A process according to any one of the preceding claims wherein the carbon energy source is selected from the group consisting of primary sewage sludge, dairy waste, molasses, food industry leftovers, coal and acetic acid.
12. A bioreaction system for treating sulphate-containing effluent, the system including a bioreactor, the bioreactor containing: sulphate containing effluent; a metabolisable carbon energy source; a culture of sulphate-reducing microorganisms for reducing the sulphate in the effluent to sulphide; and a culture of methane-producing organisms for producing methane from the carbon energy source, wherein the arrangement is such that the metabolisable carbon energy source is present in the bioreactor in an amount in excess of that which would be required for the biological reduction of sulphate to sulphide in the effluent.
13. A bioreaction system as claimed in claim 12 wherein the sulphate- containing effluent is obtained from an industrial process, selected from the group including, but not limited to the tanning, mining and paper producing industrial processes.
14. A bioreaction system as claimed in either one of claim 12 wherein the carbon energy source is selected from the group including, but not limited to primary sewage sludge, dairy molasses, food industry leftovers, coal and acetic acid.
15. A bioreaction system as claimed in any one of claims 12 to 14 wherein the culture of sulphate-reducing microorganisms is obtained from primary sewage sludge.
16. A bioreaction system as claimed in any one of claims 12 to 14 wherein the culture of methane-producing microorganisms is obtained from primary sewage sludge
17. A bioreaction system as claimed in any one of claims 12 to 14 wherein the reactor is anaerobic.
18. A bioreaction system as claimed in claim 14 wherein primary sewage sludge acts as a matrix for the culture of sulphate-reducing microorganisms; the culture of methane-producing organisms; the sulphate-containing effluent; and the metabolisable carbon energy source.
19. A bioreactor for treating sulphate-containing effluent, the bioreactor including a bioreaction vessel for containing a reaction mixture including a culture of sulphate-reducing microorganisms; a culture of methane-producing organisms; sulphate-containing effluent; and a metabolisable carbon energy source.
20. A bioreactor as claimed in claim 19 including a first inlet for the sulphate-containing effluent and for the metabolisable carbon energy source.
21. A bioreactor as claimed in claim 20 including a second inlet for methane and carbon dioxide.
22. A bioreactor as claimed in claim 21 including at least one outlet for sulphide formed during the reduction of the sulphate-containing effluent and for methane formed during the methanogenesis.
23. A bioreactor as claimed in claim 22 wherein the vessel is provided with at least one outlet for disposing of treated effluent formed in the bioreactor.
24. A bioreactor as claimed in claim 23 wherein the bioreaction vessel is in the form of an anaerobic container.
25. A bioreactor as claimed in claim 23 or 24 wherein the bioreactor has a separating means for separating the produced sulphide and methane.
26. A bioreactor as claimed in claim 25 wherein the separated methane is recirculated via the inlet providing methane and carbon dioxide.
27. A process for treating sulphate-containing effluent in a bioreactor substantially as herein described and exemplified and/or described with reference to the accompanying drawing.
28. A bioreaction system for treating sulphate-containing effluent substantially as herein described and exemplified and/or described with reference to the accompanying drawing.
29. A bioreactor for treating sulphate-containing effluent substantially as herein described and exemplified and/or described with reference to the accompanying drawing.
PCT/IB2008/054247 2007-10-16 2008-10-16 Process for treating sulphate-containing effluent WO2009050661A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AP2010005225A AP2926A (en) 2007-10-16 2008-10-16 Process for treating sulphate-containing effluent
EP20080838715 EP2217537A2 (en) 2007-10-16 2008-10-16 Process for treating sulphate-containing effluent

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA200708838 2007-10-16
ZA2007/08838 2007-10-16

Publications (2)

Publication Number Publication Date
WO2009050661A2 true WO2009050661A2 (en) 2009-04-23
WO2009050661A3 WO2009050661A3 (en) 2009-06-11

Family

ID=40521973

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2008/054247 WO2009050661A2 (en) 2007-10-16 2008-10-16 Process for treating sulphate-containing effluent

Country Status (3)

Country Link
EP (1) EP2217537A2 (en)
AP (1) AP2926A (en)
WO (1) WO2009050661A2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9631170B2 (en) 2011-10-06 2017-04-25 University Of Wyoming Genetically inducible hydrogen peroxide resistance and production

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2484990A2 (en) * 1979-07-23 1981-12-24 Degremont Purification of effluent water contg. sulphate and organic material - by anaerobic bacterial treatment and continuous desulphurisation of partial side stream
EP0241999A1 (en) * 1986-04-16 1987-10-21 Biothane Systems International B.V. Anaerobic purification of waste water containing sulphate and organic material
US4839052A (en) * 1987-03-10 1989-06-13 Council For Scientific And Industrial Research Biological treatment of water
WO2000021891A1 (en) * 1998-10-15 2000-04-20 Water Research Commission Treatment of water containing carbonaceous solids
US6315904B1 (en) * 1999-07-30 2001-11-13 Water Research Commission Process for treating sulphate-containing waste water
WO2002088032A1 (en) * 2001-04-30 2002-11-07 Pulles Howard & De Lange Inc. Treatment of water

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2484990A2 (en) * 1979-07-23 1981-12-24 Degremont Purification of effluent water contg. sulphate and organic material - by anaerobic bacterial treatment and continuous desulphurisation of partial side stream
EP0241999A1 (en) * 1986-04-16 1987-10-21 Biothane Systems International B.V. Anaerobic purification of waste water containing sulphate and organic material
US4839052A (en) * 1987-03-10 1989-06-13 Council For Scientific And Industrial Research Biological treatment of water
WO2000021891A1 (en) * 1998-10-15 2000-04-20 Water Research Commission Treatment of water containing carbonaceous solids
US6315904B1 (en) * 1999-07-30 2001-11-13 Water Research Commission Process for treating sulphate-containing waste water
WO2002088032A1 (en) * 2001-04-30 2002-11-07 Pulles Howard & De Lange Inc. Treatment of water

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9631170B2 (en) 2011-10-06 2017-04-25 University Of Wyoming Genetically inducible hydrogen peroxide resistance and production

Also Published As

Publication number Publication date
AP2926A (en) 2014-06-30
WO2009050661A3 (en) 2009-06-11
AP2010005225A0 (en) 2010-04-30
EP2217537A2 (en) 2010-08-18

Similar Documents

Publication Publication Date Title
US10144664B2 (en) Anaerobic fermentation to produce biogas
KR101304396B1 (en) Waste activated sludge phosphorus and magnesium stripping process and struvite production system
US7811455B2 (en) Removal of ammonia from fermentation effluent and sequestration as ammonium bicarbonate and/or carbonate
US20130134089A1 (en) Method and system for treating wastewater
RU2652253C2 (en) Process for biological removal of nitrogen from wastewater
DK2802639T3 (en) ANAEROBIC PROCESS
EP2135938A1 (en) Anaerobic fermentation process and plant
WO2009014346A3 (en) Plant for aerobic and anaerobic digestion treatment by pfr
KR100897722B1 (en) Apparatus for treatment of liquid wastes produced from anaerobic digestion of organic wastes
Moestedt et al. Two‐stage anaerobic digestion for reduced hydrogen sulphide production
JP6316119B2 (en) Anaerobic treatment method and apparatus
CN113735400A (en) Coupling treatment method for vinasse and high-concentration wastewater generated after brewing of white spirit
EP2217537A2 (en) Process for treating sulphate-containing effluent
JP2009207944A (en) Method for removing hydrogen sulfide from biogas
JP2007007620A (en) Method for treating nitrogen-containing liquid waste
US20100200497A1 (en) Method for Treating Percolate Water Produced During Dry Fermentation
CN215667629U (en) Landfill leachate and kitchen anaerobic biogas slurry coprocessing device
CA2750392C (en) Anaerobic fermentation to produce biogas
NO20151467A1 (en) Process and plant for producing biogas

Legal Events

Date Code Title Description
DPE1 Request for preliminary examination filed after expiration of 19th month from priority date (pct application filed from 20040101)
WWE Wipo information: entry into national phase

Ref document number: 2008838715

Country of ref document: EP

NENP Non-entry into the national phase

Ref country code: DE