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21 BIODEGRADATION OF OILFIELD PRODUCTION PIT SLUDGES Robert E. Marks, Graduate Research Assistant Stephen D. Field, Associate Professor Department of Civil Engineering Andrew Wojtanowicz, Assistant Professor Department of Petroleum Engineering Louisiana State University Baton Rouge, Louisiana 70803 INTRODUCTION This research effort seeks to develop a biological treatment for degrading the oil and grease fractions in drilling fluids and production sludges prior to solids separation. The drilling fluids are produced as excess waste during the development of the oil and gas resources while the production waste sludges are generated during the production life of the oilfield. Both kinds of wastes are stored in open, walled impoundments or pits, and solids range from 5-75% (v/v). The presence of oil and grease in both the drill cuttings and production sludges has a severe detrimental effect on the type of treatment and handling procedures which can be employed for disposal of these waste materials. The State of Louisiana through the Department of Natural Resources (DNR), currently regulates the treatment and final disposition of petroleum non-hazardous oilfield wastes (NOW) through Statewide Order 29-B. This order permits closure of pits by burial, trenching, land treatment, solidification, and offsite disposal provided specific criteria are met.1 These criteria provide for closure approvals of those pits which are low in oil content (> 1%, oil & grease, dry wt.) when mixed with the surrounding soils for land treatment. Table I shows the oil & grease closure limits for disposal methods, applicable to waste pits, by Statewide Order 29-B. Those pits which have a high oil and grease content are not readily amenable to cost-effective waste pit closures by the above methods. Biological treatment for the biodegradation or separation of the oil could provide either an intermediate step or in some cases be the ultimate processing step. Both State and Federal agencies require elimination of these waste pits which contain the NOW waste. However, the United States Environmental Protection Agency is charged with the task of evaluating the constituents of these wastes to determine whether they should be classified and regulated under the Resource Conservation and Recovery Act (RCRA). If reclassification occurs, new research will be stimulated towards working with these wastes for separation and destruction of the hazardous components. A proposed ban on land disposal in the early 1990's, will increase the demand for new technologies to treat and dispose of these oilfield wastes effectively. Table I. State of Louisiana Limits for Oil & Grease for Disposal of Non-Hazardous Oilfield Wastes Disposal Method Allowable Maximum 1. Burial or trenching . cells 3% (Dry Wt.) 2. Land treatment • Zone 1% (Dry Wt.) • Runoff water 10 ppm 3. Solidification • Leachate 10 ppm 175
Object Description
Purdue Identification Number | ETRIWC198721 |
Title | Biodegradation of oilfield production pit sludges |
Author |
Marks, Robert E. Field, Stephen D. Wojtanowicz, Andrew K. |
Date of Original | 1987 |
Conference Title | Proceedings of the 42nd Industrial Waste Conference |
Conference Front Matter (copy and paste) | http://e-archives.lib.purdue.edu/u?/engext,38818 |
Extent of Original | p. 175-184 |
Collection Title | Engineering Technical Reports Collection, Purdue University |
Repository | Purdue University Libraries |
Rights Statement | Digital object copyright Purdue University. All rights reserved. |
Language | eng |
Type (DCMI) | text |
Format | JP2 |
Date Digitized | 2009-08-03 |
Capture Device | Fujitsu fi-5650C |
Capture Details | ScandAll 21 |
Resolution | 300 ppi |
Color Depth | 8 bit |
Description
Title | page 175 |
Collection Title | Engineering Technical Reports Collection, Purdue University |
Repository | Purdue University Libraries |
Rights Statement | Digital copyright Purdue University. All rights reserved. |
Language | eng |
Type (DCMI) | text |
Format | JP2 |
Capture Device | Fujitsu fi-5650C |
Capture Details | ScandAll 21 |
Transcript | 21 BIODEGRADATION OF OILFIELD PRODUCTION PIT SLUDGES Robert E. Marks, Graduate Research Assistant Stephen D. Field, Associate Professor Department of Civil Engineering Andrew Wojtanowicz, Assistant Professor Department of Petroleum Engineering Louisiana State University Baton Rouge, Louisiana 70803 INTRODUCTION This research effort seeks to develop a biological treatment for degrading the oil and grease fractions in drilling fluids and production sludges prior to solids separation. The drilling fluids are produced as excess waste during the development of the oil and gas resources while the production waste sludges are generated during the production life of the oilfield. Both kinds of wastes are stored in open, walled impoundments or pits, and solids range from 5-75% (v/v). The presence of oil and grease in both the drill cuttings and production sludges has a severe detrimental effect on the type of treatment and handling procedures which can be employed for disposal of these waste materials. The State of Louisiana through the Department of Natural Resources (DNR), currently regulates the treatment and final disposition of petroleum non-hazardous oilfield wastes (NOW) through Statewide Order 29-B. This order permits closure of pits by burial, trenching, land treatment, solidification, and offsite disposal provided specific criteria are met.1 These criteria provide for closure approvals of those pits which are low in oil content (> 1%, oil & grease, dry wt.) when mixed with the surrounding soils for land treatment. Table I shows the oil & grease closure limits for disposal methods, applicable to waste pits, by Statewide Order 29-B. Those pits which have a high oil and grease content are not readily amenable to cost-effective waste pit closures by the above methods. Biological treatment for the biodegradation or separation of the oil could provide either an intermediate step or in some cases be the ultimate processing step. Both State and Federal agencies require elimination of these waste pits which contain the NOW waste. However, the United States Environmental Protection Agency is charged with the task of evaluating the constituents of these wastes to determine whether they should be classified and regulated under the Resource Conservation and Recovery Act (RCRA). If reclassification occurs, new research will be stimulated towards working with these wastes for separation and destruction of the hazardous components. A proposed ban on land disposal in the early 1990's, will increase the demand for new technologies to treat and dispose of these oilfield wastes effectively. Table I. State of Louisiana Limits for Oil & Grease for Disposal of Non-Hazardous Oilfield Wastes Disposal Method Allowable Maximum 1. Burial or trenching . cells 3% (Dry Wt.) 2. Land treatment • Zone 1% (Dry Wt.) • Runoff water 10 ppm 3. Solidification • Leachate 10 ppm 175 |
Resolution | 300 ppi |
Color Depth | 8 bit |
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