WO2002040642A1 - Bacterial control by bacteriophages - Google Patents
Bacterial control by bacteriophages Download PDFInfo
- Publication number
- WO2002040642A1 WO2002040642A1 PCT/GB2001/005010 GB0105010W WO0240642A1 WO 2002040642 A1 WO2002040642 A1 WO 2002040642A1 GB 0105010 W GB0105010 W GB 0105010W WO 0240642 A1 WO0240642 A1 WO 0240642A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- bacteria
- bacterium
- bacteriophages
- sulphate reducing
- stressing
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N1/00—Microorganisms, e.g. protozoa; Compositions thereof; Processes of propagating, maintaining or preserving microorganisms or compositions thereof; Processes of preparing or isolating a composition containing a microorganism; Culture media therefor
- C12N1/06—Lysis of microorganisms
Definitions
- the present invention relates to the control of bacteria, particularly bacteria which can cause corrosion or other undesired effects.
- Bacteria present in process plant and gas production facilities such as oil and gas wells, pipelines and sewage plants can cause microbiologically influenced corrosion which can lead to severe problems.
- the bacteria can convert sulphate generally found
- water can be treated with biocidal chemicals such as aldehydes or quaternary amines. These chemicals can be effective against free floating bacteria but are considerably less effective against sessile bacteria covered by a biofilm. Furthermore, the chemicals are toxic to both humans and marine life and regulatory authorities are reluctant to allow their use.
- biocidal chemicals such as aldehydes or quaternary amines.
- An object of the present invention is to control the spread of undesired bacteria whilst reducing one or more of the undesired effects described above.
- a method for controlling bacteria comprising stressing a bacterium so that it lyses and produces bacteriophages that are then used to kill other bacteria.
- bacteriophages Stressing bacteria so that they lyse or rupture and die producing viruses called bacteriophages which then kill other bacteria is a very efficient way of killing bacteria without the large scale use of biocidal chemicals which can be damaging to the environment.
- the bacteriophages produced by the lysing bacteria are specific to other bacteria of the same type.
- the bacteria can be stressed by any suitable method such as the application of an appropriate amount of ultra-violet light, heat, antibiotics or chemicals that are toxic to the bacteria.
- the amount of ultra-violet light, heat, toxic or stress inducing chemicals or antibiotics to which the bacteria are exposed is predetermined in experiments to ensure that it stresses a bacterium but does not immediately kill it before it produces bacteriophages which can then be used to kill other bacteria.
- the invention is particularly suitable for use with low density concentrations of bacteria which are particularly susceptible to being stressed.
- Such relatively low density concentrations of bacteria generally exist in process plant and gas wells due to the relatively harsh conditions.
- the bacteriophages may akeady exist latent within the host bacterial cell and lysing of the bacteria is induced by stressing the bacteria. Alternatively or additionally bacteriophages may be introduced into a bacterium before it is stressed.
- Figure 1 shows one form of bacteriophage multiplication
- Figure 2 shows two forms of bacteriophage multiplication
- FIG. 3 schematically shows steps performed in the present invention.
- FIG. 4 shows the results of an experiment performed to illustrate the present invention.
- Bacteriophage multiplication takes place by either of two mechanisms respectively called the lytic cycle in which the host bacterium lyses and is killed and the lysogenic cycle in which the host bacterial cell may remain alive following invasion of the bacteriophage.
- lytic cycle a bacteriophage injects its nucleic acid into the host cell and immediately directs synthesis of its own viral components using host cell resources. At maturation of the components are assembled into new viral particles and the host cell lyses (ruptures) and dies.
- FIG. 1 illustrates such a lytic cycle in which at stage A a bacteriophage 10 attaches itself to a host bacterium 20 having a cell wall 21 and a chromosome 22.
- the bacteriophage 10 has a capsid or head 11 containing DNA 12 and a tail 13 comprising a sheath 14, several tail fibres 15, and a base plate 16.
- stage B part of the tail of the bacteriophage 10 penetrates the cell wall 21 of the bacterium 20, contracts its sheath 14 and injects its DNA 12.
- the bacteriophage DNA 12 directs synthesis of bacteriophage components by the host cell.
- the bacteriophage components are assembled into new bacteriophages and at stage E the host cell lyses and releases the new bacteriophages.
- the host bacterium may remain alive following invasion by the bacteriophage.
- the bacteriophage injects its DNA into the host cell and the bacteriophage DNA is able to insert itself into the DNA of the host cell (the inserted bacteriophage DNA is referred to as a prophage). Every time the host bacterial cell machinery replicates the bacterial chromosome it also replicates the prophage DNA. The prophage remains latent in the host cell DNA.
- Figure 2 illustrates how a host bacterial cell injected with bacteriophage DNA may follow either of the lytic or lysogenic cycles.
- a bacteriophage 10 attaches to a host cell 20 and injects its DNA 12.
- the host cell 20 already contains its own chromosome 22.
- the bacteriophage DNA circularises and may enter either the lytic cycle illustrated on the left hand side of figure 2 or the lysogenic cycle illustrated on the right hand side of figure 2.
- stage (iii) new bacteriophage DNA and proteins are synthesised and assembled into new bacteriophages and at stage (iv) the host cell 20 lyses releasing the new bacteriophages at least some of which may attach to new host cells.
- stage (ii) instead of following the lytic cycle the host cell 20 follows the lysogenic cycle it will proceed from stage (ii) to stage (v) in which the bacteriophage DNA integrates within the bacterial chromosome by recombination to form a prophage 23.
- stage (vi) when the lysogenic bacterium reproduces normally it will also reproduce its chromosome 22 with the prophage 23 so that the bacteriophage DNA is also reproduced.
- the host cell 20 and reproduced cells with the prophage 23 may continue reproducing indefinitely. However, occasionally the prophage may excise itself from the bacterial chromosome by another recombination event initiating a lytic cycle as shown in stage (vii).
- step S it has been found that by subjecting a bacteria cell 20 containing bacteriophage DNA to stress (step S) that the cell 20 then follows the lytic cycle, lysing the cell and releasing numerous bacteriophages 10 to attach to other bacteria.
- bacteriophages attach to these other bacteria they will also follow the lytic cycle and lyse, killing the bacteria and releasing more bacteriophages (step K) especially if the bacteria are not thriving which is generally the case in the unfavourable environment down oil and gas production facilities and in process plant.
- the bacteria may be stressed by any of a plurality of influences such as an appropriate preferably predetermined dose of ultra-violet light, heat, antibiotics or chemicals.
- the dose must be large enough to stress the bacteria but not too large to kill all the bacteria without at least some of the bacteria bemg able to lyse and release further bacteriophages.
- the bacteria 20 to be killed will generally already contain latent bacteriophages but if necessary or desired bacteriophages can be added to the bacteria cells 20 before they are stressed by any well known method (step B).
- Desulfovibrio desulfuricans which is readily available from production wells and many culture collections well known to those skilled in the art including strains such as ATCC 13541 and ATCC 14563 (ATCC - American Type Culture Collection).
- Samples of the bacteria were grown in suitable nutrients well known to those skilled in the art in an incubator for 20 hours at 30°C. 10 ml aliquots of growing culture were withdrawn and placed in Petri dishes in an anaerobic cabinet. Some Petri dishes containing samples were exposed to ultra-violet light for between 0 to 5 minutes by a 300 ⁇ Wcm ⁇ 2 UN light source spaced 15.2 cm from the sample.
- Nery usefully the method of the invention can be applied to the control of sulphate reducing bacteria by stressing these bacteria and isolating bacteriophages produced.
- the produced bacteriophages are then added to water contained within oil and gas production facilities, process plant or hydrocarbon storage or to water intended for use in hydrotesting pipelines and other pressurised equipment to control sulphate reducing bacteria infestation.
Abstract
The present invention relates to the control of bacteria, particularly bacteria which can cause corrosion or other undesired effects. The bacteria are controlled by stressing the bacteria, e.g. by the application of ultra-violet light, so that the bacteria lyses and produce bacteriophages which then kill other bacteria. The bacteria to be killed may contain latent bacteriophage DNA or bacteriophages may be added before the bacteria is stressed.
Description
BACTERIAL CONTROL BY BACTERIOPHAGES
The present invention relates to the control of bacteria, particularly bacteria which can cause corrosion or other undesired effects.
Bacteria present in process plant and gas production facilities such as oil and gas wells, pipelines and sewage plants can cause microbiologically influenced corrosion which can lead to severe problems. The bacteria can convert sulphate generally found
in such facilities into hydrogen sulphide (H2S) which causes localised acidification
and thus localised corrosion of carbon and stainless steels when in the presence of water. Furthermore, hydrogen sulphide is toxic and when generated in oil and gas wells can poison operators at the top of the well.
In order to avoid microbiologically influenced corrosion, water can be treated with biocidal chemicals such as aldehydes or quaternary amines. These chemicals can be effective against free floating bacteria but are considerably less effective against sessile bacteria covered by a biofilm. Furthermore, the chemicals are toxic to both humans and marine life and regulatory authorities are reluctant to allow their use.
An object of the present invention is to control the spread of undesired bacteria whilst reducing one or more of the undesired effects described above.
According to the present invention there is provided a method for controlling bacteria, the method comprising stressing a bacterium so that it lyses and produces bacteriophages that are then used to kill other bacteria.
Stressing bacteria so that they lyse or rupture and die producing viruses called bacteriophages which then kill other bacteria is a very efficient way of killing bacteria without the large scale use of biocidal chemicals which can be damaging to the environment. The bacteriophages produced by the lysing bacteria are specific to other bacteria of the same type.
The bacteria can be stressed by any suitable method such as the application of an appropriate amount of ultra-violet light, heat, antibiotics or chemicals that are toxic to the bacteria. The amount of ultra-violet light, heat, toxic or stress inducing chemicals or antibiotics to which the bacteria are exposed is predetermined in experiments to ensure that it stresses a bacterium but does not immediately kill it before it produces bacteriophages which can then be used to kill other bacteria.
The invention is particularly suitable for use with low density concentrations of bacteria which are particularly susceptible to being stressed. Such relatively low density concentrations of bacteria generally exist in process plant and gas wells due to the relatively harsh conditions.
The bacteriophages may akeady exist latent within the host bacterial cell and lysing of the bacteria is induced by stressing the bacteria. Alternatively or additionally bacteriophages may be introduced into a bacterium before it is stressed.
An example of the present invention will now be described with reference to the accompanying drawings in which:-
Figure 1 shows one form of bacteriophage multiplication;
Figure 2 shows two forms of bacteriophage multiplication;
Figure 3 schematically shows steps performed in the present invention; and
Figure 4 shows the results of an experiment performed to illustrate the present invention.
Bacteriophage multiplication takes place by either of two mechanisms respectively called the lytic cycle in which the host bacterium lyses and is killed and the lysogenic cycle in which the host bacterial cell may remain alive following invasion of the bacteriophage. Each of these mechanisms will be described below: 1. In the lytic cycle a bacteriophage injects its nucleic acid into the host cell and immediately directs synthesis of its own viral components using host cell resources.
At maturation of the components are assembled into new viral particles and the host cell lyses (ruptures) and dies.
The consequence of the lytic cycle is an immediate switch of the bacterial metabolism to meet the needs of the infective bacteriophage with cell rupture and bacteriophage dispersion following sometimes in a matter of minutes. Figure 1 illustrates such a lytic cycle in which at stage A a bacteriophage 10 attaches itself to a host bacterium 20 having a cell wall 21 and a chromosome 22. The bacteriophage 10 has a capsid or head 11 containing DNA 12 and a tail 13 comprising a sheath 14, several tail fibres 15, and a base plate 16. At stage B part of the tail of the bacteriophage 10 penetrates the cell wall 21 of the bacterium 20, contracts its sheath 14 and injects its DNA 12. At stage C the bacteriophage DNA 12 directs synthesis of bacteriophage components by the host cell. At stage D the bacteriophage components are assembled into new bacteriophages and at stage E the host cell lyses and releases the new bacteriophages.
2. h the lysogenic cycle the host bacterium may remain alive following invasion by the bacteriophage. The bacteriophage injects its DNA into the host cell and the bacteriophage DNA is able to insert itself into the DNA of the host cell (the inserted bacteriophage DNA is referred to as a prophage). Every time the
host bacterial cell machinery replicates the bacterial chromosome it also replicates the prophage DNA. The prophage remains latent in the host cell DNA.
Figure 2 illustrates how a host bacterial cell injected with bacteriophage DNA may follow either of the lytic or lysogenic cycles. At stage (i) a bacteriophage 10 attaches to a host cell 20 and injects its DNA 12. The host cell 20 already contains its own chromosome 22. At stage (ii) the bacteriophage DNA circularises and may enter either the lytic cycle illustrated on the left hand side of figure 2 or the lysogenic cycle illustrated on the right hand side of figure 2. If the cell follows the lytic cycle, at stage (iii) new bacteriophage DNA and proteins are synthesised and assembled into new bacteriophages and at stage (iv) the host cell 20 lyses releasing the new bacteriophages at least some of which may attach to new host cells.
If at stage (ii) instead of following the lytic cycle the host cell 20 follows the lysogenic cycle it will proceed from stage (ii) to stage (v) in which the bacteriophage DNA integrates within the bacterial chromosome by recombination to form a prophage 23. At stage (vi) when the lysogenic bacterium reproduces normally it will also reproduce its chromosome 22 with the prophage 23 so that the bacteriophage DNA is also reproduced. The host cell 20 and reproduced cells with the prophage 23 may continue reproducing indefinitely. However, occasionally the prophage may excise itself from the bacterial chromosome by another recombination event initiating a lytic cycle as shown in stage (vii).
As shown in Figure 3, it has been found that by subjecting a bacteria cell 20 containing bacteriophage DNA to stress (step S) that the cell 20 then follows the lytic cycle, lysing the cell and releasing numerous bacteriophages 10 to attach to other bacteria. When bacteriophages attach to these other bacteria they will also follow the lytic cycle and lyse, killing the bacteria and releasing more bacteriophages (step K) especially if the bacteria are not thriving which is generally the case in the unfavourable environment down oil and gas production facilities and in process plant. The bacteria may be stressed by any of a plurality of influences such as an appropriate preferably predetermined dose of ultra-violet light, heat, antibiotics or chemicals. The dose must be large enough to stress the bacteria but not too large to kill all the bacteria without at least some of the bacteria bemg able to lyse and release further bacteriophages. The bacteria 20 to be killed will generally already contain latent bacteriophages but if necessary or desired bacteriophages can be added to the bacteria cells 20 before they are stressed by any well known method (step B).
Experiments were performed with a well known sulphate reducing bacterium called Desulfovibrio desulfuricans which is readily available from production wells and many culture collections well known to those skilled in the art including strains such as ATCC 13541 and ATCC 14563 (ATCC - American Type Culture Collection). Samples of the bacteria were grown in suitable nutrients well known to those skilled in the art in an incubator for 20 hours at 30°C. 10 ml aliquots of growing culture were withdrawn and placed in Petri dishes in an anaerobic cabinet. Some Petri dishes
containing samples were exposed to ultra-violet light for between 0 to 5 minutes by a 300μWcm~2 UN light source spaced 15.2 cm from the sample. Irradiated samples were put into anaerobic, empty, sterile vials and incubated at 30°C. 1 ml samples were removed after 0, 24 and 48 hours and the optical density of the samples was measured. Since bacteria block the passage of light, a sample with more bacteria will have a greater optical density (OD). As bacteria multiply the OD will continuously increase. Figure 4 shows the marked reduction in post treatment growth rate of UN treated samples (i.e. reduction in increase of optical density ID).
Stressing the sulphate reducing bacteria with other influences such as heat, chemicals or antibiotics produces similar effects. Other sulphate reducing bacteria are also affected in a similar way.
Bacteria which may usefully be controlled by the method of the invention include those generally found in process plant and oil and gas production facilities. Frequently these are sulphate reducing bacteria such as those belonging to the genera Desulfovibrio and Desulfotomaculum. In particular the method may be used to control growth of bacteria such as Desulfovibrio salexigens, Desulfovibrio gigas and Desulfotomaculum nigriβcans. Examples of particular strains include ATCC 13541, ΝCIMB 8303, ATCC 14944, ATCC 19364 and ATCC 49858. (ΝCIMB = National Collections of Industrial and Marine Bacteria).
Nery usefully the method of the invention can be applied to the control of sulphate reducing bacteria by stressing these bacteria and isolating bacteriophages produced. The produced bacteriophages are then added to water contained within oil and gas production facilities, process plant or hydrocarbon storage or to water intended for use in hydrotesting pipelines and other pressurised equipment to control sulphate reducing bacteria infestation.
Claims
1. A method for controlling bacteria, the method comprising stressing a bacterium so that it lyses and produces bacteriophages which then kill other bacteria.
2. A method according to claim 1, wherein the bacterium is subjected to a predetermined level of stress.
3. A method according to claim 2, wherein the predetermined level of stress is sufficient to stress the bacterium but not so great that it kills the bacterium before it produces bacteriophages to kill other bacteria.
4. A method according to claim 2 or claim 3, wherein the bacterium is stressed by the application of ultra-violet light.
5. A method according to claim 2 or claim 3, wherein the bacterium is stressed by the application of heat.
6. A method according to claim 2 or claim 3, wherein the bacterium is stressed by the application of a chemical.
7. A method according to claim 2 or 3, wherein the bacterium is stressed by the application of an antibiotic.
8. A method according to any of the preceding claims, wherein bacteriophages are added to the bacterium before it is stressed.
9. A method according to any of the preceding claims, wherein the bacteria to be stressed are in process plant or oil and gas production facilities.
10. A method according to any of the preceding claims, wherein the bacterium to be stressed is a sulphate reducing bacterium.
11. A method according to any of the preceding claims, wherein the produced bacteriphages are isolated and the isolated bacteriophages are added to a medium containing further bacteria.
12. A method according to claim 11, wherein the medium containing further bacteria is water contained within oil and gas production facilities, process plant or hydrocarbon storage or water intended for use in hydrotesting pipelines and other pressurised equipment.
13. A method substantially as hereinbefore described with particular reference to the accompanying drawings.
14. A method for controlling sulphate reducing bacteria, the method comprising stressing a sulphate reducing bacterium so that it lyses and produces bacteriophages that kill other sulphate reducing bacteria and the method including the following steps:-
(i) Stressing sulphate reducing bacteria and isolation of bacteriophage; (ii) Adding bacteriophage to water contained within oil and gas production facilities, process plant or hydrocarbon storage to control sulphate reducing bacteria infestation.
15. A method for controlling sulphate reducing bacteria, the method comprising stressing a sulphate reducing bacterium so that it lyses and produces bacteriophages that kill other sulphate reducing bacteria and the method including the following steps:-
(i) Stressing sulphate reducing bacteria and isolation of bacteriophage; (ii) Adding bacteriophage to water intended for use in hydrotesting pipelines and other pressurised equipment.
6. A method for controlling sulphate reducing bacteria, the method comprising stressing a sulphate reducing bacterium so that it lyses and produces bacteriophages that kill other sulphate reducing bacteria and the method including the following steps. •-
(i) Stressing sulphate reducing bacteria within oil and gas production facilities or process plant to produce bacteriophage, said bacteriophages then control sulphate reducing bacteria infestation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2002214155A AU2002214155A1 (en) | 2000-11-15 | 2001-11-13 | Bacterial control by bacteriophages |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0027824A GB0027824D0 (en) | 2000-11-15 | 2000-11-15 | Bacterial control |
| GB0027824.2 | 2000-11-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2002040642A1 true WO2002040642A1 (en) | 2002-05-23 |
Family
ID=9903184
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/GB2001/005010 WO2002040642A1 (en) | 2000-11-15 | 2001-11-13 | Bacterial control by bacteriophages |
Country Status (3)
| Country | Link |
|---|---|
| AU (1) | AU2002214155A1 (en) |
| GB (2) | GB0027824D0 (en) |
| WO (1) | WO2002040642A1 (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120040439A1 (en) * | 2010-08-11 | 2012-02-16 | Phage Biocontrol Research, Llc | Use of Prokaryote Viruses to Remediate Bio-Fouling |
| US8168419B2 (en) | 2010-01-14 | 2012-05-01 | Phage Biocontrol Research, Llc | Prevention and remediation of petroleum reservoir souring and corrosion by treatment with virulent bacteriophage |
| US8252519B2 (en) | 2010-08-12 | 2012-08-28 | Phage Biocontrol Research, Llc | Process for continuous production of bacteriophage |
| US20120258523A1 (en) * | 2009-03-28 | 2012-10-11 | Phage Biocontrol Research, Llc | Process for remediating biofouling in water systems with virulent bacteriophage |
| US20140061123A1 (en) * | 2010-12-31 | 2014-03-06 | Elizabeth J. Summer | Prevention and Remediation of Petroleum Reservoir Souring and Corrosion by Treatment with Virulent Bacteriophage |
| AU2014202695A1 (en) * | 2014-05-18 | 2015-12-03 | Durairaj, Nagendra Prasad DR | Native phage enrichment to combat bacterial proliferation at Critical non-food-contact surface areas of food industries |
| US9453247B2 (en) | 2011-05-25 | 2016-09-27 | Dow Global Technologies Llc | Application of bacteriophages for the control of unwanted bacteria in biofuel production mediated by non-bacterial reactive agents |
| US9464267B2 (en) | 2013-03-14 | 2016-10-11 | Dow Global Technologies Llc | Staged bacteriophage remediation of target bacteria |
| WO2018034884A1 (en) * | 2016-08-18 | 2018-02-22 | Exxonmobil Research And Engineering Company | Methods to assess monitor and control bacterial biofilms |
| RU2766503C1 (en) * | 2020-04-17 | 2022-03-15 | Индиан Оил Корпорейшн Лимитед | Treatment of oil pipelines against microbiological corrosion with biocomposition |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2143238A (en) * | 1983-03-31 | 1985-02-06 | Dr Anthony Stuart Breeze | A method for enzyme liberation from bacterial cells |
| JPS60159596A (en) * | 1984-01-30 | 1985-08-21 | Agency Of Ind Science & Technol | Prevention of stain by living organism |
-
2000
- 2000-11-15 GB GB0027824A patent/GB0027824D0/en not_active Ceased
-
2001
- 2001-11-13 WO PCT/GB2001/005010 patent/WO2002040642A1/en not_active Application Discontinuation
- 2001-11-13 GB GB0127146A patent/GB2373512A/en not_active Withdrawn
- 2001-11-13 AU AU2002214155A patent/AU2002214155A1/en not_active Abandoned
Non-Patent Citations (5)
| Title |
|---|
| DATABASE BIOSIS [online] BIOSCIENCES INFORMATION SERVICE, PHILADELPHIA, PA, US; 1989, SAKAGUCHI I ET AL: "CONTROL OF MICROBIOFOULING USING BACTERIOPHAGE 2. DETECTION OF PHAGES AND FUNDAMENTAL STUDY OF THEIR LYTIC EFFECT ON FOULING BACTERIA", XP002189225, Database accession no. PREV199090074375 * |
| DATABASE BIOSIS [online] BIOSCIENCES INFORMATION SERVICE, PHILADELPHIA, PA, US; 1990, ARAKI M ET AL: "USING BACTERIOPHAGE FOR SLIME CONTROL IN THE PAPER MILL", XP002189224, Database accession no. PREV199090092487 * |
| DENRYOKU CHUO KENKYUSHO HOKOKU, no. U89030, 1989, pages 1 - 32, ISSN: 0387-2394 * |
| SEYEDIRASHTI S ET AL: "INDUCTION AND PARTICAL PURIFICATION OF BACTERIOPHAGES FROM DESULFOVIBRIO VULGARIS (HILDENBOROUHG) AND DESULFOVIBRIO DESULFURICANS ATCC 13541", JOURNAL OF GENERAL MICROBIOLOGY, SOCIETY FOR MICROBIOLOGY, READING, GB, vol. 137, 1991, pages 1545 - 1549, XP001026306, ISSN: 0022-1287 * |
| TAPPI (TECHNICAL ASSOCIATION OF THE PULP AND PAPER INDUSTRY) JOURNAL, vol. 73, no. 8, 1990, pages 155 - 158, ISSN: 0734-1415 * |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140102975A1 (en) * | 2009-03-28 | 2014-04-17 | Elizabeth J. Summer | Process for reducing bio-corrosion in water systems |
| US20120258523A1 (en) * | 2009-03-28 | 2012-10-11 | Phage Biocontrol Research, Llc | Process for remediating biofouling in water systems with virulent bacteriophage |
| US8168419B2 (en) | 2010-01-14 | 2012-05-01 | Phage Biocontrol Research, Llc | Prevention and remediation of petroleum reservoir souring and corrosion by treatment with virulent bacteriophage |
| US8585899B2 (en) | 2010-01-14 | 2013-11-19 | Douglas Baldwin | Prevention and remediation of petroleum reservoir souring and corrosion by treatment with virulent bacteriophage |
| US8252576B2 (en) * | 2010-08-11 | 2012-08-28 | Phage Biocontrol Research, Llc | Use of prokaryote viruses to remediate bio-fouling |
| US20120040439A1 (en) * | 2010-08-11 | 2012-02-16 | Phage Biocontrol Research, Llc | Use of Prokaryote Viruses to Remediate Bio-Fouling |
| US8252519B2 (en) | 2010-08-12 | 2012-08-28 | Phage Biocontrol Research, Llc | Process for continuous production of bacteriophage |
| US20140061123A1 (en) * | 2010-12-31 | 2014-03-06 | Elizabeth J. Summer | Prevention and Remediation of Petroleum Reservoir Souring and Corrosion by Treatment with Virulent Bacteriophage |
| US9650272B2 (en) * | 2010-12-31 | 2017-05-16 | Dow Global Technologies Llc | Prevention and remediation of petroleum reservoir souring and corrosion by treatment with virulent bacteriophage |
| US9453247B2 (en) | 2011-05-25 | 2016-09-27 | Dow Global Technologies Llc | Application of bacteriophages for the control of unwanted bacteria in biofuel production mediated by non-bacterial reactive agents |
| US9464267B2 (en) | 2013-03-14 | 2016-10-11 | Dow Global Technologies Llc | Staged bacteriophage remediation of target bacteria |
| AU2014202695A1 (en) * | 2014-05-18 | 2015-12-03 | Durairaj, Nagendra Prasad DR | Native phage enrichment to combat bacterial proliferation at Critical non-food-contact surface areas of food industries |
| WO2018034884A1 (en) * | 2016-08-18 | 2018-02-22 | Exxonmobil Research And Engineering Company | Methods to assess monitor and control bacterial biofilms |
| RU2766503C1 (en) * | 2020-04-17 | 2022-03-15 | Индиан Оил Корпорейшн Лимитед | Treatment of oil pipelines against microbiological corrosion with biocomposition |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2373512A (en) | 2002-09-25 |
| GB0127146D0 (en) | 2002-01-02 |
| AU2002214155A1 (en) | 2002-05-27 |
| GB0027824D0 (en) | 2000-12-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Veldkamp et al. | Mixed culture studies with the chemostat | |
| Johnson | Bacterial reduction of arsenate in sea water | |
| Trevors et al. | Gene transfer among bacteria in soil and aquatic environments: a review | |
| Ahring | Methanogenesis in thermophilic biogas reactors | |
| Newton et al. | Isolation of cyanobacteria from the aquatic fern, Azolla | |
| US20140102975A1 (en) | Process for reducing bio-corrosion in water systems | |
| WO2002040642A1 (en) | Bacterial control by bacteriophages | |
| Kaya et al. | The viability of Scenedesmus bicellularis cells immobilized on alginate screens following nutrient starvation in air at 100% relative humidity | |
| US9464267B2 (en) | Staged bacteriophage remediation of target bacteria | |
| US8241499B2 (en) | Control of filamentous bacteria induced foaming in wastewater systems | |
| Diks et al. | The influence of NaCl on the degradation rate of dichloromethane by Hyphomicrobium sp. | |
| Thomas et al. | Free ammonia offers algal crop protection from predators in dairy wastewater and ammonium-rich media | |
| Beacham et al. | Genospecies diversity of Acinetobacter isolates obtained from a biological nutrient removal pilot plant of a modified UCT configuration | |
| Madhaiyan et al. | Plant growth promoting abilities of novel Burkholderia-related genera and their interactions with some economically important tree species | |
| CN107723264A (en) | A kind of Seawater Nitrate reducing bacteria strain X HNA1 of purifying aquatic water inorganic nitrogen and its application | |
| Fletcher et al. | Polychlorobiphenyl (PCB) metabolism by plant cells | |
| Bui-Xuan et al. | Green biorefinery: Microalgae-bacteria microbiome on tolerance investigations in plants | |
| Simsek et al. | Cultivation of green microalgae Golenkinia radiata (Chodat, 1894) in textile wastewater without sterilization | |
| Omenn | Controlled testing and monitoring methods for microorganisms | |
| Vallejo et al. | Differential Behaviour of Mycelial Growth of Several Botrytis cinerea Strains on either Patchoulol‐or Globulol‐amended Media | |
| Meike et al. | Review of microbial responses to abiotic environmental factors in the context of the proposed Yucca Mountain repository | |
| CN111155502A (en) | Comprehensive treatment method for water hyacinth | |
| Storey | Survival of tapeworm eggs, free and in proglottids, during simulated sewage treatment processes | |
| Rai et al. | Influence of chromium on some physiological variables of Anabaena doliolum: interaction with metabolic inhibitors | |
| Jayachandran et al. | A novel Acinetobacter sp. for treating highly acidic rubber latex centrifugation effluent |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| AK | Designated states |
Kind code of ref document: A1 Designated state(s): AL AM AT AU AZ BA BB BG BR BY CA CH CN CU CZ DE DK EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT UA UG US UZ VN YU ZW |
|
| AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG |
|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
| DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
| REG | Reference to national code |
Ref country code: DE Ref legal event code: 8642 |
|
| 122 | Ep: pct application non-entry in european phase | ||
| NENP | Non-entry into the national phase |
Ref country code: JP |
|
| WWW | Wipo information: withdrawn in national office |
Country of ref document: JP |