page 507 |
Previous | 1 of 18 | Next |
|
|
Loading content ...
53 FATE AND BIOKINETICS OF METHYL-t-BUTYL ETHER IN ACTIVATED SLUDGE SYSTEMS AND ITS ENGINEERING SIGNIFICANCE P. T. Sun, Senior Staff Research Engineer J. P. Salanitro, Senior Staff Microbiologist W. T. Tang, Senior Research Engineer Westhollow Technology Center Shell Development Company Houston, Texas 77251 -1380 INTRODUCTION The use of methyl tertiary-butyl ether (MTBE) will increase significantly in the next few years due to the requirements of the Reformulated Fuel Program which is mandated by the newly authorized Clean Air Act (CAA). MTBE will also be added to gasoline to replace light aliphatics and aromatics. In addition, several MTBE production units will be installed by the chemical processing industries. These activities may pose a significant wastewater treatment problem at MTBE manufacturing facilities, petroleum refineries, gasoline product terminals, as well as contaminated groundwater at retail facilities. Although MTBE has relatively low toxicity, it is highly water soluble and is less volatile and less carbon adsorbable than benzene. Current wastewater treatment practices for these wastewaters, such as air stripping and carbon adsorption, are mainly designed for the removal of benzene and other similar compounds. They may not be the most cost-effective choices in the event that stringent MTBE discharge limits are imposed. Biological treatment of wastewater containing MTBE, if successfully demonstrated, may present a better solution. This chapter summarizes a laboratory study in evaluating the biokientics of MTBE degradation by an enrichment culture. The information gathered in this study was used in devising an engineering design procedure so that biodegradation of MTBE can be maximized. THEORY-COMPETITION BETWEEN BIODEGRADATION AND STRIPPING Although, MTBE is less volatile than compounds such as benzene, air stripping can remove significant amounts because of the long retention time and high capacity aeration conditions prevailing in industrial wastewater treatment plants. The major processes for MTBE removal are air stripping and biodegradation. The following sections describe the theoretical analysis to relate pertinent factors which affect these two processes. Its detailed development can be found in reference 1. Air Stripping Equation 1 describes the air stripping process in a completely mixed activated sludge (CMAS) system with no biodegradation;2 s 1 + 1+- K\a-V F-H/R-T (1) 51st Purdue Industrial Waste Conference Proceedings, 1996, Ann Arbor Press. Inc.. Chelsea. Michigan 48118. Printed in U.S.A. 507
Object Description
Purdue Identification Number | ETRIWC199653 |
Title | Fate and biokinetics of methyl-t-butyl ether in activated sludge systems and its engineering significance |
Author |
Sun, Paul T. Salanitro, J. P. Tang, W. T. |
Date of Original | 1996 |
Conference Title | Proceedings of the 51st Industrial Waste Conference |
Conference Front Matter (copy and paste) | http://e-archives.lib.purdue.edu/u?/engext,46351 |
Extent of Original | p. 507-524 |
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 | 2009-10-27 |
Capture Device | Fujitsu fi-5650C |
Capture Details | ScandAll 21 |
Resolution | 300 ppi |
Color Depth | 8 bit |
Description
Title | page 507 |
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 | 53 FATE AND BIOKINETICS OF METHYL-t-BUTYL ETHER IN ACTIVATED SLUDGE SYSTEMS AND ITS ENGINEERING SIGNIFICANCE P. T. Sun, Senior Staff Research Engineer J. P. Salanitro, Senior Staff Microbiologist W. T. Tang, Senior Research Engineer Westhollow Technology Center Shell Development Company Houston, Texas 77251 -1380 INTRODUCTION The use of methyl tertiary-butyl ether (MTBE) will increase significantly in the next few years due to the requirements of the Reformulated Fuel Program which is mandated by the newly authorized Clean Air Act (CAA). MTBE will also be added to gasoline to replace light aliphatics and aromatics. In addition, several MTBE production units will be installed by the chemical processing industries. These activities may pose a significant wastewater treatment problem at MTBE manufacturing facilities, petroleum refineries, gasoline product terminals, as well as contaminated groundwater at retail facilities. Although MTBE has relatively low toxicity, it is highly water soluble and is less volatile and less carbon adsorbable than benzene. Current wastewater treatment practices for these wastewaters, such as air stripping and carbon adsorption, are mainly designed for the removal of benzene and other similar compounds. They may not be the most cost-effective choices in the event that stringent MTBE discharge limits are imposed. Biological treatment of wastewater containing MTBE, if successfully demonstrated, may present a better solution. This chapter summarizes a laboratory study in evaluating the biokientics of MTBE degradation by an enrichment culture. The information gathered in this study was used in devising an engineering design procedure so that biodegradation of MTBE can be maximized. THEORY-COMPETITION BETWEEN BIODEGRADATION AND STRIPPING Although, MTBE is less volatile than compounds such as benzene, air stripping can remove significant amounts because of the long retention time and high capacity aeration conditions prevailing in industrial wastewater treatment plants. The major processes for MTBE removal are air stripping and biodegradation. The following sections describe the theoretical analysis to relate pertinent factors which affect these two processes. Its detailed development can be found in reference 1. Air Stripping Equation 1 describes the air stripping process in a completely mixed activated sludge (CMAS) system with no biodegradation;2 s 1 + 1+- K\a-V F-H/R-T (1) 51st Purdue Industrial Waste Conference Proceedings, 1996, Ann Arbor Press. Inc.. Chelsea. Michigan 48118. Printed in U.S.A. 507 |
Resolution | 300 ppi |
Color Depth | 8 bit |
Tags
Comments
Post a Comment for page 507