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Bio-Oxidation of Concentrated Board Machine Effluents T. P. QUIRK, Assistant Professor of Civil Engineering Manhattan College Bronx, New York R. C. OLSON, Manager Process Engineering Wood Conversion Company Cloquet, Minnesota G. H. RICHARDSON, Chemist E. H. Ruble & Associates Duluth, Minnesota INTRODUCTION The biological oxidation of pulp and paper mill effluents has been the subject of considerable basic and applied research. Both fixed bed trickling filters, and fluid bed activated sludge systems have been employed in numerous designs (1, 2, 3,4, 5). In general, full scale operating experience has been limited to relatively dilute effluents with five-day BOD concentrations ranging from 150 to 750 ppm. The process feasibility of bio-oxidation for these effluents has been well established. Available cost information varies widely depending upon the degree of BOD removal, the treatment process employed, and the number of unit operations included in the system design. For a specified BOD reduction and treatment system annual costs per pound removed may be expected to vary inversely with the BOD concentration of the feed wastes. Published data indicate removal cost for secondary treatment ranging from less than $2 per hundred lbs removed to more than $7 per hundred lbs for primary effluent concentrations varying from 200 to 500 ppm (5,6,7). Water conservation procedures are therefore essential in reducing organic losses as well as the volume of liquid handled. Experience has demonstrated, however, that a limit may be reached where the total quantity of dissolved solids discharged remains essentially constant. Additional machine close-up increases the concentration of oxygen consuming materials in proportion to the decrease in effluent volume. The treatment characteristics and cost requirements of these concentrated effluents require individual evaluation. This paper describes the results of a laboratory scale study conducted to determine the feasibility of bio-oxidation of concentrated machine wastes from the production of mineral and wood fiber insulating boards. The study is part of an overall program of pollution control designed to evaluate the relative costs of in- mill conservation measures and external treatment systems. WASTE CHARACTERISTICS The Cloquet, Minnesota, mill of the Wood Conversion Company, manufactures decorative and insulating boards from mineral and wood fiber raw material. Effluent waters are discharged into the St. Louis River. Wastes originate primarily from pulping and machine room operations and vary widely depending upon - 655 -
Object Description
Purdue Identification Number | ETRIWC196356 |
Title | Bio-oxidation of concentrated board machine effluents |
Author |
Quirk, T. P. (Thomas P.) Olson, R. C. Richardson, G. H. |
Date of Original | 1963 |
Conference Title | Proceedings of the eighteenth Industrial Waste Conference |
Conference Front Matter (copy and paste) | http://earchives.lib.purdue.edu/cdm4/document.php?CISOROOT=/engext&CISOPTR=10285&REC=20 |
Extent of Original | p. 655-673 |
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 | 2009-05-18 |
Capture Device | Fujitsu fi-5650C |
Capture Details | ScandAll 21 |
Resolution | 300 ppi |
Color Depth | 8 bit |
Description
Title | page 655 |
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 | Bio-Oxidation of Concentrated Board Machine Effluents T. P. QUIRK, Assistant Professor of Civil Engineering Manhattan College Bronx, New York R. C. OLSON, Manager Process Engineering Wood Conversion Company Cloquet, Minnesota G. H. RICHARDSON, Chemist E. H. Ruble & Associates Duluth, Minnesota INTRODUCTION The biological oxidation of pulp and paper mill effluents has been the subject of considerable basic and applied research. Both fixed bed trickling filters, and fluid bed activated sludge systems have been employed in numerous designs (1, 2, 3,4, 5). In general, full scale operating experience has been limited to relatively dilute effluents with five-day BOD concentrations ranging from 150 to 750 ppm. The process feasibility of bio-oxidation for these effluents has been well established. Available cost information varies widely depending upon the degree of BOD removal, the treatment process employed, and the number of unit operations included in the system design. For a specified BOD reduction and treatment system annual costs per pound removed may be expected to vary inversely with the BOD concentration of the feed wastes. Published data indicate removal cost for secondary treatment ranging from less than $2 per hundred lbs removed to more than $7 per hundred lbs for primary effluent concentrations varying from 200 to 500 ppm (5,6,7). Water conservation procedures are therefore essential in reducing organic losses as well as the volume of liquid handled. Experience has demonstrated, however, that a limit may be reached where the total quantity of dissolved solids discharged remains essentially constant. Additional machine close-up increases the concentration of oxygen consuming materials in proportion to the decrease in effluent volume. The treatment characteristics and cost requirements of these concentrated effluents require individual evaluation. This paper describes the results of a laboratory scale study conducted to determine the feasibility of bio-oxidation of concentrated machine wastes from the production of mineral and wood fiber insulating boards. The study is part of an overall program of pollution control designed to evaluate the relative costs of in- mill conservation measures and external treatment systems. WASTE CHARACTERISTICS The Cloquet, Minnesota, mill of the Wood Conversion Company, manufactures decorative and insulating boards from mineral and wood fiber raw material. Effluent waters are discharged into the St. Louis River. Wastes originate primarily from pulping and machine room operations and vary widely depending upon - 655 - |
Resolution | 300 ppi |
Color Depth | 8 bit |
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