WO1998039259A1 - Biodegradation des boues d'hydrocarbures residuaires - Google Patents

Biodegradation des boues d'hydrocarbures residuaires Download PDF

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Publication number
WO1998039259A1
WO1998039259A1 PCT/CA1998/000108 CA9800108W WO9839259A1 WO 1998039259 A1 WO1998039259 A1 WO 1998039259A1 CA 9800108 W CA9800108 W CA 9800108W WO 9839259 A1 WO9839259 A1 WO 9839259A1
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WO
WIPO (PCT)
Prior art keywords
sludge
oil
hydrocarbons
hydrocarbon
reactor
Prior art date
Application number
PCT/CA1998/000108
Other languages
English (en)
Inventor
Owen P. Ward
Ajay Singh
Original Assignee
Petrozyme Technologies, Inc.
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 Petrozyme Technologies, Inc. filed Critical Petrozyme Technologies, Inc.
Priority to AU59787/98A priority Critical patent/AU5978798A/en
Publication of WO1998039259A1 publication Critical patent/WO1998039259A1/fr
Priority to US10/351,616 priority patent/US6652752B2/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/02—Biological treatment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • 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
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge 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
    • C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
    • 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
    • C02F2101/30—Organic compounds
    • C02F2101/32—Hydrocarbons, e.g. oil
    • 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
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage
    • 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
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/20—Sludge processing

Definitions

  • the present invention is directed to the treatment of oil sludges, and in particular to biodegradation of oil sludges to environmentally-acceptable products.
  • the present invention is directed to the treatment of compositions with high sludge/total petroleum hydrocarbon concentrations, examples of which are oil refinery sludges, tank-bottom sludges from oil storage tanks or tankers, sludges from residues at oil wells, so- called slop oil or treater emulsions, oil sludges from processing of solids containing oil wastes including centrifuged sludges, clay fines, and drilling mud residues.
  • waste water treatment processes utilizing low total petroleum hydrocarbon concentrations or processes for the production of single cell protein, biomass or bacterial cells.
  • Biodegradation of crude oil materials has primarily been directed to the clean up i.e. biore ediation, of oil-contaminated soils and shorelines, as a result of on- land oil spills from, for example, underground storage tanks, or from oil tankers at sea.
  • Such bioremediation of hydrocarbons generally involves creation of conditions in the soil or on the shoreline that promote growth of microorganisms using the petroleum hydrocarbons, facilitating conversion of the hydrocarbons to biomass and/or their degradation, ultimately to carbon dioxide and water.
  • the hydrocarbons are the source of carbon for microbial growth, although it may be necessary to add other ingredients, especially nitrogen and phosphorus, as fertilizers.
  • Microorganisms also require a range of inorganic ions for growth, but such ions are generally present in adequate quantities in the soil that is being treated.
  • Bioremediation processes generally utilize aerobic microorganisms that require aeration/oxygenation by maximizing contact of the contaminated material with atmospheric oxygen through procedures of soil tilling or by aerating using positive or negative pressure air pumping systems.
  • Liquid-solid treatment systems have also been used to degrade petroleum hydrocarbons. However, long degradation treatment periods were encountered, e.g. 50- 100 days. Land treatment of waste crude oils and refinery oil sludges has been used for many years as a method of disposal of oil and sludge. Microbial growth and biodegradation rates tend to be suboptimal in land farming processes and the process is not easily controlled. In addition the process is influenced by soil composition, weather and temperature, as well as the methods used for tilling in the land farming process. For large refineries, large areas of land have to be committed to such a process, and moreover the first step in the process involves contamination of the soil with the oils to be degraded.
  • U.S. 3 899 376 discloses a single or multi-tank system that is primarily directed to waste water treatment. The process utilizes a particular bacterial strain from a culture collection for the bioremediation process.
  • U.S. 5 364 789 discloses a microbial cleaner comprising at least one hydrocarbon-ingesting microbe strain and a biocatalyst that transforms hydrocarbons into non-toxic substances.
  • the biocatalyst includes a non-ionic surfactant, a chlorine-absorbing salt, at least one microbe nutrient and water. It is stated that the cleaner may be used in virtually any situation requiring the removal of hydrocarbons, including cleaning contaminated soil and treating oil spills on soil and water.
  • an aspect of the present invention provides a method for the biodegradation of an oil-based sludge, said oil-based sludge comprising a mixture of petroleum hydrocarbons, said method comprising the steps of:
  • the nutrients comprise bioavailable nitrogen, phosphorous and potassium compounds, especially in which the nitrogen compound is an ammonium ion, nitrate or organic nitrogen, and the phosphorus is phosphate.
  • the reactor contains about 5- 50% by volume of said petroleum hydrocarbons, especially about 10-30% by volume of said petroleum hydrocarbons.
  • the oil-based sludge preferably contains hexane-extractable hydrocarbons in an amount in the range of up to 500 000 ppm, especially in the range of 65 000- 250 000 ppm.
  • the nutrients are in proportions corresponding to relative proportions in bacterial cells, and supplied at concentrations which promote high levels of bacterial growth and high rates of hydrocarbon degradation.
  • the petroleum hydrocarbons consist of mixtures of saturated hydrocarbons, aromatic hydrocarbons, hydrocarbon resins and asphaltenes, especially petroleum hydrocarbons obtained from petroleum refinery sludge, from the bottom of a storage tank for oil, from an on-land well head or from the washing of a hold in a tanker.
  • the amount of nitrogen required to support the process is in the range of 50- 1000 ppm, and preferably in the range of 300-700 ppm, and the minimum amount of phosphate is in the range of 10-200 ppm and preferably 50-150 ppm.
  • the aqueous solution contains a surfactant, more especially a non-ionic or an anionic surfactant.
  • the surfactant is in an amount sufficient to form said oil-in-water emulsion, especially in which the amount of surfactant is less than 2500 ppm and preferably less than 1500 ppm. It is preferred that the ratio of the amount of petroleum hydrocarbon to surfactant be at least 40:1.
  • the method of the present invention relates to the biodegradation of an oil-based sludge.
  • the oil-based sludge comprises a mixture of petroleum hydrocarbons and may include non-petroleum solid or liquid contaminants and water.
  • the petroleum hydrocarbon mixture would normally comprise a mixture of aliphatic hydrocarbons, aromatic hydrocarbons, hydrocarbon resins and asphaltenes.
  • the present invention is particularly directed to the biodegradation of a mixture of the petroleum hydrocarbon from among the aliphatics, aromatics, resins and asphaltenes.
  • Such mixtures of petroleum hydrocarbons may be obtained from a variety of sources.
  • the mixture may be in form of a sludge obtained from a petroleum refinery.
  • the sludge may also be obtained from the bottom of a storage tank that has been used for the storage of petroleum oil, with the sludge being obtained particularly when the storage tank is cleaned or drained.
  • the mixture of hydrocarbons could be a petroleum residue obtained from around an on-land well head, be an oil-containing clay fines material or be or from the cleaning of a hold of a tanker used for the transportation of petroleum products.
  • the mixture of petroleum hydrocarbons which is referred to herein as a sludge, may also be obtained from a variety of other sources.
  • the sludge is characterized by having a substantial proportion of heavy end petroleum hydrocarbons which may require use of a solubilizing agent or surfactant to facilitate mixing and dispersal in water, as an oil-in-water emulsion.
  • the method of the present invention is carried out in a reactor. It is preferred that the reactor be a single stage reactor that is charged with the solution described herein, allowed to incubate for a period of time to reduce the amount of hydrocarbons within the aqueous solution, and then subsequently discharged from the reactor. Nonetheless, it is to be understood that the reactor could be in the form of a series of reactors in which the aqueous solution is passed from reactor to reactor before being finally discharged from the process for the biodegradation of the sludge.
  • an aqueous solution is fed to the reactor.
  • the aqueous solution is comprised of an oil-in- water emulsion, bacterial culture and nutrients for the bacterial culture.
  • the sludge is in the form of the oil- in-water emulsion.
  • the amount of petroleum hydrocarbons fed to the reactor is primarily governed by the formation of the oil-in-water emulsion.
  • the aqueous solution may contain up to 50% by volume of petroleum hydrocarbons, depending on the particular hydrocarbons, or higher if the petroleum hydrocarbons will permit formation of oil-in-water emulsions at higher loadings.
  • the reactor contains 5-50% by volume of the petroleum hydrocarbons, especially 10-30% by volume.
  • the oil-based sludge contains hexane-extractable hydrocarbons.
  • the amount of hexane-extractable hydrocarbons is up to 500 000 ppm, especially in the range of 65 000 - 250 000 ppm.
  • the surfactant is preferably a nonionic or an anionic surfactant, and is used in an amount sufficient to form the emulsion. Nonetheless, the amount of the surfactant is preferably less than 2500 and particularly less than 1500 ppm.
  • the amount of surfactant, if added, is maintained at as low a level as is consistent with obtaining the oil-in-water emulsion.
  • the ratio of petroleum hydrocarbon to surfactant be at least 40:1, and especially at least 60:1.
  • the aqueous solution also contains a bacterial culture.
  • the bacterial culture used in the method of the present invention is a natural-occurring bacterial culture. Such a culture may be isolated from a hydrocarbon-contaminated soil or from hydrocarbons- containing sludge or from other environments, including soil or activated sludge, which may be rich in hydrocarbon-degrading bacteria, and inoculated in a basal medium, as described herein.
  • the bacterial culture is selected by its ability to grow on petroleum hydrocarbons as the predominant source of carbon in the basal medium. Bacterial enrichment techniques for isolation of a bacterial culture capable of growing on hydrocarbons are well understood in the art.
  • Typical techniques comprise adding a sample of soil, sludge or other material containing a large population of bacteria to an aqueous medium containing hydrocarbons as the only or predominant carbon source.
  • Other chemical components including an inorganic nitrogen source, phosphorous and salts necessary to support bacterial growth are also added.
  • Such a medium can be used to preferentially promote multiplication of hydrocarbon-degrading bacteria using standard aerobic microbial cultivation methods, including incubation in aerated microbial culture vessels.
  • an efficient hydrocarbon degrading culture is selected.
  • the culture can be maintained or stored using methods well known in the art.
  • the maintained culture may be inoculated into an aqueous medium consisting of the nutrients described herein, supplemented with petroleum hydrocarbons and incubated in an aerated reactor or fermenter or other culture vessel.
  • the preferred inoculum volume is 0.1-20% by volume of total culture volume, preferably 1-5% by volume.
  • the preferred concentration of petroleum hydrocarbons used in this inoculum development medium is 0.5-5%, and can be obtained from various sources including petroleum sludges, crude oils or refined oils such as diesel oil.
  • a typical aeration rate of the inoculum reactor is 0.1- 1.0 volumes of air per volume of medium per minute, with the culture incubated in the temperature range 20-37°C for 1-7 days, preferably at 27-33°C, at a pH generally maintained in the range 6.5-8.0, preferably in the range 7-7.5.
  • the resultant bacterial culture maybe used to inoculate the reactor containing the sludge to be degraded, at a rate of 0.1-20% of total sludge volume, preferably 1-5%. Where a much larger volume of inoculum is required, the resultant inoculum may be transferred as an inoculum to a larger culture vessel and the culture development process repeated on the larger scale.
  • the aqueous solution fed to the reactor also contains nutrients for the bacterial culture.
  • nutrients for the bacterial culture may be used, as will be understood by persons skilled in the art. Such nutrients will include nitrogen, phosphorus and potassium compounds, and would normally also include a variety of other ingredients. In particular, the nutrients comprise bioavailable nitrogen and phosphorus compounds.
  • the amount of nitrogen is in the range of 50-1000 ppm and preferably 400-700 ppm
  • the amount of phosphate is in the range of 10-200 ppm and preferably 50-150 ppm.
  • the nutrient also contains optimized concentrations of compounds other than nitrogen, phosphorus, carbon, oxygen and sodium, required to support bacterial growth and therefore it is normally necessary to add to the reactor one or more of magnesium, manganese, inorganic or organic sulphur, calcium, iron, copper, cobalt, zinc, boron and molybdenum. It will be appreciated that a guide for selection of the relative amounts of nitrogen, phosphorus and other required nutrients is to relate their concentrations to the amounts of these components present in bacterial cells.
  • a nutrient composition is as follows: N as NH 4 ,N0 3 , or organic N 500-700 ppm P as phosphate or related form 100-120 ppm K 50-90 ppm Mg 10 ppm
  • Surfactant 1250 ppm Co, Zn, B, Mo 5-10 ppb each
  • the relative ratios of these nutrients are similar to the ratios typically found in the compositions of bacterial cells.
  • the aqueous solution in the reactor is maintained at a temperature of a least 10°C. Preferred temperatures are 15-37°C, and especially 20-33°C.
  • the aqueous solution is maintained in the reactor for a period of time sufficient to reduce the amount of total petroleum hydrocarbon by at least 25%, especially by at least 50%. Typical times to effect the reduction in total petroleum hydrocarbon is 5- 20 days, depending on the petroleum hydrocarbon being treated and the reactor conditions.
  • the aqueous solution is discharged from the reactor.
  • the aqueous solution has a reduced amount of hydrocarbons, including a reduced amount of the hydrocarbons from the group comprising the aromatics, resins and asphaltenes.
  • the present invention may be used for the biodegradation of sludges, as described herein.
  • it may be used for biodegradation of a combination of hydrocarbon components from among the fractions: saturates, aromatics, resins and asphaltenes.
  • the water phase may also be used to preferentially degrade a proportion of the hydrocarbons, in a manner which causes the emulsion to break and facilitate separation of a water phase and a residual oil phase.
  • the residual oil phase may be recovered for reuse.
  • the oil phase may be recycled to the next reactor cycle with the water phase only being discharged from the reactor.
  • the water phase contains high concentrations of hydrocarbon- degrading bacteria.
  • the water phase may. be used for processes including soil bioremediation processes, by direct spraying of the water on the contaminated soil.
  • the bacteria maybe recovered from the water phase by known methods (filtration or centrifugation) and subsequently the bacteria may be applied in these other processes.
  • a portion of the degraded sludge amounting for example, to 1-20% of reactor volume, may be retained in the reactor following discharge, as an inoculum source for the next sludge batch.
  • the invention extends to fed-batch, continuous and semi-continuous reactor processes.
  • the fed-batch process after the batch process has proceeded for some time, additional sludge and/or nutrients/surfactant are added at one or more intervals and the process is allowed to continue.
  • additional sludge and/or nutrients/surfactant are added at one or more intervals and the process is allowed to continue.
  • degraded sludge is removed from the reactor and replaced with undegraded sludge and nutrients/surfactants on a continuous basis or at intervals, respectively.
  • the basal medium used in this example contained (per L) : KH 2 P0 4 , 1.0 g; Na 2 HP0 4 , 1.5 g; MgS0 4 .7H 2 0, 0.2 g; Na 2 C0 3 , 0.1 g; CaCl 2 .2H 2 0, 0.05 g; FeS0 4 , 0.005 g; MnS0 4 , 0.02 g; and trace metal solution, 3 ml.
  • the trace metal solution contained (per L) : ZnCl 2 .4H 2 0, 0.0144 g; CoCl 2 , 0.012 g; Na 2 Mo0 4 .2H 2 0, 0.012 g; CuS0 4 .5H 2 0, 1.9 g; H 3 B0 4 , 0.05 g: and HC1, 35 ml.
  • the initial pH of the nutrient was adjusted to 7.2.
  • a population of mixed bacterial culture was maintained in a cyclone fermenter with a working volume of one litre.
  • Petroleum hydrocarbon-degrading bacteria were selected by their ability to grow on petroleum hydrocarbons as the sole carbon source in the basal medium described above.
  • To initiate the selection of petroleum hydrocarbon-degrading bacterial culture a mixed population of bacteria, isolated from hydrocarbon contaminated soil, was inoculated into basal medium supplemented with 2.0 g NH 4 C1/L and 1.0 g NaN0 3 /L in the cyclone. Sludge A or B (60 g/L) was used as carbon source; the sludges are describe below. It was found that the bacterial population reached 10 8 to 10 10 CFU/ml in one week. Thereafter, the culture was maintained by removing 10% by volume of the reactor and replacing with 10% by volume of fresh basal medium and sludge every , day. Using this procedure, an actively growing culture was maintained.
  • EXAMPLE II The nutrient medium used for biodegradation in this example consisted of the basal medium supplemented with 2.0 g urea/L and 1.0 g yeast extract/L.
  • Residual TPH content was determined as follows. At different time intervals, whole flask contents were extracted with 40 ml of hexane and centrifuged at 10 000 rpm for 20 minutes. The hexane layer (top) was pipetted out and transferred to a pre-weighed vial. The hexane was allowed to evaporate in a fumehood and residual oil was weighed to determine total petroleum hydrocarbons (TPH) .
  • Each set of flasks contained the following: (a) 16 ml of nutrient medium and 4 g of sludge; (b) 10 ml of nutrient medium and 10 g of sludge; (c) 20 g of sludge and 2 ml of lOx strength nutrient medium.
  • the flasks 250 ml were inoculated with 600 ⁇ l of actively growing culture from a cyclone fermenter, and incubated on a rotary shaker (200 rpm) at 25°C for 14 days.
  • NPK medium A medium referred to herein as NPK medium was formed by replacing, KH 2 P0 4 and Na 2 HP0 4 , in the nutrient medium, were replaced with a NPK (nitrogen: phosphorus:potassium) fertilizer (15:30:15) at a rate of 0.8 g/L. All other components in the medium were the same as described before. Experiments were conducted with two different sludges. Erlenmeyer flasks contained 50% v/v NPK medium and 50% v/v sludge together with 0.25% surfactant (Igepal CO-630) based on total culture volume.
  • Igepal CO-630 surfactant
  • Biodegradation of TPH in different sludges was performed in flasks under shaking conditions. Erlenmeyer flasks containing NPK medium and sludge (50:50, v/v) were inoculated with the actively growing mixed culture, and incubated for 14 days at 30°C.
  • Biodegradation of different hydrocarbon fractions was tested, using Sludge B. Erlenmeyer flasks that contained 50% v/v sludge, 50% NPK medium and 0.25% Igepal CO630. After inoculation with an actively growing culture, flasks were incubated on a rotary shaker for 14 days at 30°C. The whole content of the flask was extracted once with hexane followed by dichloromethane. After centrifugation both extracts were combined and the solvent evaporated. Residual hydrocarbon was dissolved in hexane and centrifuged. A known weight of hexane soluble portion was passed through a column (0.75 x 27 cm) of silica gel (activated at 100°C overnight) .
  • This experiment was conducted to determine if pretreatment with an advanced oxidative process (Fenton's reagent viz. H 2 0 2 + FeS0 4 ) could enhance TPH degradation in sludge.
  • Pretreatment and subsequent biodegradation was carried out in the same flask.
  • Sludge A was diluted with water to obtain 20 ml of a 50% v/v sludge concentration. pH of the mixture was adjusted to 4.0 by adding 4N HC1. H 2 0 2 and FeS0 4 were added at concentrations of 0.3% v/v and 10 millimolar, respectively.
  • the flasks were kept on a rotary shaker (200 rpm) at 25°C for 2 days.
  • NPK medium 10 times concentrated
  • the flasks were inoculated with an actively growing inoculum (600 ⁇ l) from a cyclone fermenter and incubated on a rotary shaker for a period of 28 days.
  • the following treatments were tested: (a) no pre-treatment or addition of surfactant; (b) Fenton's reagent pre-treatment, without surfactant; (c) addition of 0.25% Igepal CO-630, without Fenton's pretreatment; and (d) Fenton's reagent pretreatment in the presence of 0.25% Igepal CO-630.

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  • Life Sciences & Earth Sciences (AREA)
  • Water Supply & Treatment (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Microbiology (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Health & Medical Sciences (AREA)
  • Molecular Biology (AREA)
  • Micro-Organisms Or Cultivation Processes Thereof (AREA)
  • Treatment Of Sludge (AREA)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)

Abstract

L'invention concerne un procédé qui permet la biodégradation d'une boue d'hydrocarbures résiduaires comprenant un mélange d'hydrocarbures pétroliers. Selon le procédé, on forme dans un réacteur une solution aqueuse constituée d'une émulsion huile dans eau de la boue d'hydrocarbures, d'une culture bactérienne et des nutriments nécessaires à cette dernière. La culture bactérienne, qui est capable de se développer sur les hydrocarbures pétroliers en utilisant ceux-ci comme unique source de carbone, a été isolée à partir de terre contaminée par des hydrocarbures, de boue contenant des hydrocarbures ou d'un autre environnement riche en bactéries dégradant les hydrocarbures. Dans le réacteur, on maintient la solution aqueuse dans des conditions aérobies, à une température d'au moins 10 °C, pendant une durée suffisante pour réduire la quantité d'hydrocarbures d'au moins 25 %, puis on sort du réacteur la solution aqueuse renfermant une quantité réduite d'hydrocarbures. Le procédé peut être utilisé pour des boues contenant des aromatiques, des résines et des asphaltènes.
PCT/CA1998/000108 1997-03-05 1998-02-17 Biodegradation des boues d'hydrocarbures residuaires WO1998039259A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU59787/98A AU5978798A (en) 1997-03-05 1998-02-17 Biodegradation of oil sludge
US10/351,616 US6652752B2 (en) 1997-03-05 2003-01-21 Biodegradation of oil sludge

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CA2,199,204 1997-03-05
CA2199204 1997-03-05

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US10/351,616 Continuation-In-Part US6652752B2 (en) 1997-03-05 2003-01-21 Biodegradation of oil sludge

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6652752B2 (en) * 1997-03-05 2003-11-25 Owen P. Ward Biodegradation of oil sludge
WO2004030788A2 (fr) * 2002-10-07 2004-04-15 Mol Hungarian Oil And Gas Co. Procede biochimique pour le traitement et la prevention de la formation d'emulsions huile dans eau et eau dans huile dans des puits de petrole et equipement de surface
CN109111032A (zh) * 2018-08-29 2019-01-01 洛阳昊海工贸有限公司 一种废乳化液资源化处置的工艺方法
WO2020098385A1 (fr) * 2018-11-15 2020-05-22 东营金岛环境工程有限公司 Agent bactérien composite hautement efficace de dégradation de pétrole, son procédé de préparation et son utilisation

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Publication number Priority date Publication date Assignee Title
US4749491A (en) * 1987-04-02 1988-06-07 E. I. Du Pont De Nemours And Company Microbiological decomposition of chlorinated aliphatic hydrocarbons
JPH05161900A (ja) * 1991-12-12 1993-06-29 Fujita Corp 油脂含有汚泥の処理方法
US5271845A (en) * 1991-03-20 1993-12-21 Sanexen Services Environmentaux Inc. Aerobic biological process for treating waste sludges
JPH0938630A (ja) * 1995-07-27 1997-02-10 Corona Giken Kogyo Kk 油濁物処理方法及びシステム

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4749491A (en) * 1987-04-02 1988-06-07 E. I. Du Pont De Nemours And Company Microbiological decomposition of chlorinated aliphatic hydrocarbons
US5271845A (en) * 1991-03-20 1993-12-21 Sanexen Services Environmentaux Inc. Aerobic biological process for treating waste sludges
JPH05161900A (ja) * 1991-12-12 1993-06-29 Fujita Corp 油脂含有汚泥の処理方法
JPH0938630A (ja) * 1995-07-27 1997-02-10 Corona Giken Kogyo Kk 油濁物処理方法及びシステム

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Section Ch Week 9716, Derwent World Patents Index; Class D15, AN 97-173824, XP002065438 *
PATENT ABSTRACTS OF JAPAN vol. 017, no. 561 (C - 1119) 8 October 1993 (1993-10-08) *
PATENT ABSTRACTS OF JAPAN vol. 097, no. 006 30 June 1997 (1997-06-30) *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6652752B2 (en) * 1997-03-05 2003-11-25 Owen P. Ward Biodegradation of oil sludge
WO2004030788A2 (fr) * 2002-10-07 2004-04-15 Mol Hungarian Oil And Gas Co. Procede biochimique pour le traitement et la prevention de la formation d'emulsions huile dans eau et eau dans huile dans des puits de petrole et equipement de surface
WO2004030788A3 (fr) * 2002-10-07 2005-06-23 Mol Hungarian Oil And Gas Co Procede biochimique pour le traitement et la prevention de la formation d'emulsions huile dans eau et eau dans huile dans des puits de petrole et equipement de surface
CN109111032A (zh) * 2018-08-29 2019-01-01 洛阳昊海工贸有限公司 一种废乳化液资源化处置的工艺方法
WO2020098385A1 (fr) * 2018-11-15 2020-05-22 东营金岛环境工程有限公司 Agent bactérien composite hautement efficace de dégradation de pétrole, son procédé de préparation et son utilisation

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