page 87 |
Previous | 1 of 5 | Next |
|
|
Loading content ...
Oxidation Pond Study for Treatment of De-inking Wastes RUSSELL O. BLOSSER, Resident Engineer National Council for Stream Improvement Kalamazoo College Kalamazoo, Michigan There has been a substantial amount of research and development work in the paper industry employing low rate biological oxidation processes. The application of the low rate processes was demonstrated in the laboratory about ten yrs ago by Moggio and Amberg in a search to find methods that would accelerate the BOD removal obtained in long time storage of effluents (1), (2). Essentially their work showed that the rate of biological decomposition was influenced by the amount of dissolved oxygen furnished the system, the rate increasing as the liquid approached a true aerobic state. The rate was influenced by the nitrogen and phosphorous level present. The rate was also improved by the increase of micro flora and fauna present as a result of seeding. The application of one or more of these three fundamental factors has led to the development of low rate biological systems that accomplish BOD removal at a greater rate than is possible by storage or lagooning of effluents under quiescent conditions. Since quiescent storage of effluent from the paper industry must depend on surface absorption as a source of oxygen, a source normally not adequate to maintain a dissolved oxygen residual in the system, supplemental aeration by some mechanical means must be practiced to accelerate biological oxidation. When dissolved oxygen is maintained in the system and aeration periods exceed about one day these systems have been called aerobic stabilization systems to differentiate them from an activated sludge process. There is no established procedure for operation of aerobic stabilization systems. In almost all cases a good job of primary sedimentation is mandatory prior to the aeration period if large deposits of sludge are to be avoided in the aeration basin. The degree of mixing provided for high suspended solids effluents must be high if excessive sludge deposits in the aeration basin are to be avoided. There is usually sufficient biological coagulation and an accumulation of biological sludge which will settle in the aeration basin if not kept in suspension, or which may be removed in a secondary clarifier. The laboratory work in the development of the aerobic stabilization process for de-inking waste was conducted by the National Council and the process was pilot planted at Hamilton Paper Company in a project sponsored by the Kalamazoo River Improvement Company. LABORATORY INVESTIGATION An acclimated seed was prepared by four-day aeration of a mixture containing 20 per cent effluent from the activated sludge process and 80 per cent settled de-inking waste. At the end of the aeration period the mixture was settled and the supernatant added to clarified de-inking waste at a seed to feed rate of one to four. - 87 -
Object Description
Purdue Identification Number | ETRIWC196109 |
Title | Oxidation pond study for treatment of de-inking wastes |
Author | Blosser, R. O. (Russell O.) |
Date of Original | 1961 |
Conference Title | Proceedings of the sixteenth Industrial Waste Conference |
Conference Front Matter (copy and paste) | http://earchives.lib.purdue.edu/cdm4/document.php?CISOROOT=/engext&CISOPTR=7917&REC=15 |
Extent of Original | p. 87-91 |
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 | 2008-09-22 |
Capture Device | Fujitsu fi-5650C |
Capture Details | ScandAll 21 |
Resolution | 300 ppi |
Color Depth | 8 bit |
Description
Title | page 87 |
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 | Oxidation Pond Study for Treatment of De-inking Wastes RUSSELL O. BLOSSER, Resident Engineer National Council for Stream Improvement Kalamazoo College Kalamazoo, Michigan There has been a substantial amount of research and development work in the paper industry employing low rate biological oxidation processes. The application of the low rate processes was demonstrated in the laboratory about ten yrs ago by Moggio and Amberg in a search to find methods that would accelerate the BOD removal obtained in long time storage of effluents (1), (2). Essentially their work showed that the rate of biological decomposition was influenced by the amount of dissolved oxygen furnished the system, the rate increasing as the liquid approached a true aerobic state. The rate was influenced by the nitrogen and phosphorous level present. The rate was also improved by the increase of micro flora and fauna present as a result of seeding. The application of one or more of these three fundamental factors has led to the development of low rate biological systems that accomplish BOD removal at a greater rate than is possible by storage or lagooning of effluents under quiescent conditions. Since quiescent storage of effluent from the paper industry must depend on surface absorption as a source of oxygen, a source normally not adequate to maintain a dissolved oxygen residual in the system, supplemental aeration by some mechanical means must be practiced to accelerate biological oxidation. When dissolved oxygen is maintained in the system and aeration periods exceed about one day these systems have been called aerobic stabilization systems to differentiate them from an activated sludge process. There is no established procedure for operation of aerobic stabilization systems. In almost all cases a good job of primary sedimentation is mandatory prior to the aeration period if large deposits of sludge are to be avoided in the aeration basin. The degree of mixing provided for high suspended solids effluents must be high if excessive sludge deposits in the aeration basin are to be avoided. There is usually sufficient biological coagulation and an accumulation of biological sludge which will settle in the aeration basin if not kept in suspension, or which may be removed in a secondary clarifier. The laboratory work in the development of the aerobic stabilization process for de-inking waste was conducted by the National Council and the process was pilot planted at Hamilton Paper Company in a project sponsored by the Kalamazoo River Improvement Company. LABORATORY INVESTIGATION An acclimated seed was prepared by four-day aeration of a mixture containing 20 per cent effluent from the activated sludge process and 80 per cent settled de-inking waste. At the end of the aeration period the mixture was settled and the supernatant added to clarified de-inking waste at a seed to feed rate of one to four. - 87 - |
Resolution | 300 ppi |
Color Depth | 8 bit |
Tags
Comments
Post a Comment for page 87