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RESOURCE RECOVERY AND SOURCE CONTROL VIA ACTIVATED CARBON ADSORPTION WITH INPLACE NONDESTRUCTIVE REGENERATION Charles S. Parmele, Environmental Specialist Robert D. Fox, Engineer Hydroscience Environmental Systems Knoxville, Tennessee 37919 INTRODUCTION Since wastewater treatment costs wUl continue to go up in the future, the abUity to offset the cost of pollution control through resource recovery is an attractive objective. On one hand, advanced wastewater treatment will be necessary to achieve compliance with forthcoming EPA regulations to restrict the discharge of specific "priority pollutants." On the other hand, the incentive for resource recovery has been and will be continually changing due to escalating prices and/or shortages. Evaluations need to be updated to reflect changing conditions. For example, Table I shows that price increases made recovery of phenol and acetic acid more economically attractive in 1975 than in 1973. Table I. The New Economics of Recovery 1975 vs 1973 Phenol $0.30/lb $0.06/lb Acetic Acid $0.15/lb $0.06/lb Thus, processes which achieve compliance with discharge regulations and improve resource recovery are attractive now and wUl be even more so in the future. IN-PLACE NONDESTRUCTIVE REGENERATION The abUity of activated carbon to achieve low effluent concentrations for many of the "priority pollutants" or materials like them is known. However, even though loading capacities for specific compounds are often excellent, the universal application of activated carbon for tertiary treatment is not always the best choice. Loadings are often reduced in complex waste mixtures because of the relatively low concentrations and the presence of other organics. Another disadvantage of end-of-the-pipe applications is the usually impossible task of separating chemicals from each other for recycle. Often, therefore, a better choice is to use adsorption to separate pollutants from individual waste streams where loadings are higher due to higher concentrations and to less complex wastes and where separation of recoverable materials is much easier. The effective use of activated carbon is dependent on effective carbon utilization. Often in the past, adsorption has been limited to low feed concentrations because when used for concentrated wastes the activated carbon is saturated quickly, often within days instead of weeks or months. Although thermal regeneration is usually effective, it would be prohibitively expensive for concentrated industrial wastes. In 1969, Dow recognized that in order to efficiently utUize activated carbon, regeneration processes which were more efficient than thermal 537
Object Description
Purdue Identification Number | ETRIWC1977054 |
Title | Resource recovery and source control via activated carbon adsorption with inplace nondestructive regeneration |
Author |
Parmele, C. S. Fox, Robert D. |
Date of Original | 1977 |
Conference Title | Proceedings of the 32nd Industrial Waste Conference |
Conference Front Matter (copy and paste) | http://e-archives.lib.purdue.edu/u?/engext,26931 |
Extent of Original | p. 537-548 |
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 | 2009-07-01 |
Capture Device | Fujitsu fi-5650C |
Capture Details | ScandAll 21 |
Resolution | 300 ppi |
Color Depth | 8 bit |
Description
Title | page 537 |
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 |
Capture Device | Fujitsu fi-5650C |
Capture Details | ScandAll 21 |
Transcript | RESOURCE RECOVERY AND SOURCE CONTROL VIA ACTIVATED CARBON ADSORPTION WITH INPLACE NONDESTRUCTIVE REGENERATION Charles S. Parmele, Environmental Specialist Robert D. Fox, Engineer Hydroscience Environmental Systems Knoxville, Tennessee 37919 INTRODUCTION Since wastewater treatment costs wUl continue to go up in the future, the abUity to offset the cost of pollution control through resource recovery is an attractive objective. On one hand, advanced wastewater treatment will be necessary to achieve compliance with forthcoming EPA regulations to restrict the discharge of specific "priority pollutants." On the other hand, the incentive for resource recovery has been and will be continually changing due to escalating prices and/or shortages. Evaluations need to be updated to reflect changing conditions. For example, Table I shows that price increases made recovery of phenol and acetic acid more economically attractive in 1975 than in 1973. Table I. The New Economics of Recovery 1975 vs 1973 Phenol $0.30/lb $0.06/lb Acetic Acid $0.15/lb $0.06/lb Thus, processes which achieve compliance with discharge regulations and improve resource recovery are attractive now and wUl be even more so in the future. IN-PLACE NONDESTRUCTIVE REGENERATION The abUity of activated carbon to achieve low effluent concentrations for many of the "priority pollutants" or materials like them is known. However, even though loading capacities for specific compounds are often excellent, the universal application of activated carbon for tertiary treatment is not always the best choice. Loadings are often reduced in complex waste mixtures because of the relatively low concentrations and the presence of other organics. Another disadvantage of end-of-the-pipe applications is the usually impossible task of separating chemicals from each other for recycle. Often, therefore, a better choice is to use adsorption to separate pollutants from individual waste streams where loadings are higher due to higher concentrations and to less complex wastes and where separation of recoverable materials is much easier. The effective use of activated carbon is dependent on effective carbon utilization. Often in the past, adsorption has been limited to low feed concentrations because when used for concentrated wastes the activated carbon is saturated quickly, often within days instead of weeks or months. Although thermal regeneration is usually effective, it would be prohibitively expensive for concentrated industrial wastes. In 1969, Dow recognized that in order to efficiently utUize activated carbon, regeneration processes which were more efficient than thermal 537 |
Resolution | 300 ppi |
Color Depth | 8 bit |
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