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The Effect of Whey Upon the Operation of An Activated-Sludge Plant D. P. Backmeyer Superintendent of Sewage Treatment Plant Marion, Indiana It is the purpose of this paper to bring to the attention of those primarily interested in both the disposal and utilization of dairy byproducts the specific problem of treating sewage containing cheese whey. The discussion will necessarily be limited to the experiences encountered at the Marion, Indiana, sewage-treatment plant. This plant is modern in design, and employs the activated-sludge treatment process for secondary purification of the sewage and industrial wastes from the city of Marion. Under normal operating conditions, the plant has not been excessively loaded, and as a result a consistently satisfactory effluent has been produced since the plant was put in operation about seven years ago. The problems involved in the treatment of sewage containing cheese whey can be divided into two classes: namely (1) overload conditions resulting from "batch" doses of whey dumped to the sewer at infrequent intervals, and (2) the continuous daily dumping of whey into the sewer system. The problems will be discussed in the order mentioned. A typical example of a flare-up resulting from "batch" waste dumping of whey occurred in February, 1946. As routine daily tests were made for dissolved oxygen at the effluent weirs of the aeration tanks on the morning of the 19th, it was noted that the D.O. concentration was dangerously low. A check of flow conditions and air volume being supplied to the aeration tanks showed these factors to be apparently normal. After some further observations were made, several conditions were noted that indicated a highly concentrated industrial waste had reached the secondary-treatment tanks. The suspicion that the waste might be cheese whey was verified after making several telephone calls to local plants processing dairy products. One of the industries had dumped about 25,000 pounds of whey into the city sewer. At first consideration, this amount of whey may seem like an insignificant dribble of industrial waste which any treatment plant might take in its normal stride. However, this is not the case. Just consider what happened to the activated- sludge plant, and why it happened. 310
Object Description
Purdue Identification Number | ETRIWC194735 |
Title | Effect of whey upon the operation of an activated-sludge plant |
Author | Backmeyer, D. P. (David P.) |
Date of Original | 1947 |
Conference Title | Proceedings of the third Industrial Waste Conference |
Conference Front Matter (copy and paste) | http://earchives.lib.purdue.edu/cdm4/document.php?CISOROOT=/engext&CISOPTR=1709&REC=8 |
Extent of Original | p. 310-315 |
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 | 2009-06-08 |
Capture Device | Fujitsu fi-5650C |
Capture Details | ScandAll 21 |
Resolution | 300 ppi |
Color Depth | 8 bit |
Description
Title | page310 |
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 | The Effect of Whey Upon the Operation of An Activated-Sludge Plant D. P. Backmeyer Superintendent of Sewage Treatment Plant Marion, Indiana It is the purpose of this paper to bring to the attention of those primarily interested in both the disposal and utilization of dairy byproducts the specific problem of treating sewage containing cheese whey. The discussion will necessarily be limited to the experiences encountered at the Marion, Indiana, sewage-treatment plant. This plant is modern in design, and employs the activated-sludge treatment process for secondary purification of the sewage and industrial wastes from the city of Marion. Under normal operating conditions, the plant has not been excessively loaded, and as a result a consistently satisfactory effluent has been produced since the plant was put in operation about seven years ago. The problems involved in the treatment of sewage containing cheese whey can be divided into two classes: namely (1) overload conditions resulting from "batch" doses of whey dumped to the sewer at infrequent intervals, and (2) the continuous daily dumping of whey into the sewer system. The problems will be discussed in the order mentioned. A typical example of a flare-up resulting from "batch" waste dumping of whey occurred in February, 1946. As routine daily tests were made for dissolved oxygen at the effluent weirs of the aeration tanks on the morning of the 19th, it was noted that the D.O. concentration was dangerously low. A check of flow conditions and air volume being supplied to the aeration tanks showed these factors to be apparently normal. After some further observations were made, several conditions were noted that indicated a highly concentrated industrial waste had reached the secondary-treatment tanks. The suspicion that the waste might be cheese whey was verified after making several telephone calls to local plants processing dairy products. One of the industries had dumped about 25,000 pounds of whey into the city sewer. At first consideration, this amount of whey may seem like an insignificant dribble of industrial waste which any treatment plant might take in its normal stride. However, this is not the case. Just consider what happened to the activated- sludge plant, and why it happened. 310 |
Resolution | 300 ppi |
Color Depth | 8 bit |
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