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Preliminary Results of a New Approach in the Aerobic Biological Treatment of Highly Concentrated Wastes FRED M. WELCH, Program Manager Research Division Allis-Chalmers Manufacturing Company Milwaukee, Wisconsin INTRODUCTION In the early 1960's Allis-Chalmers initiated an experimental program utilizing a device termed the Two-Phase Contactor (TPC). The Two-Pnase Contactor as the name denotes is a mass transfer device for contacting one fluid with another. In most instances this has been a liquid with a gas. The TPC consists basically of a series of rotating discs which are partially submerged in one fluid and as the discs are rotated, carry a thin film of fluid up into contact with the upper fluid. Following some successful experiments using the Two-Phase Contactor as an aeration or gas transfer device it was decided to field test a TPC in various processes for treating wastewater. Initially, two TPC units were taken to a local waste treatment plant where they were arranged to test various waste treatment processes. One series of tests required the establishment of a biological lawn or film on the discs of a TPC unit. In this manner, the rotating disc functioned as a support media for the biomass, an aeration mechanism and a controlled means for contacting the biomass with the sewage. From this description was coined the terms Rotating Biological Contactor or RBC. During the ensuing testing program which tested the efficiency of the Two-Phase Contactor as an aeration device and as a Rotating Biological Contactor, it was possible to examine and evaluate each of the proposed processes. All of the various processes tested during the initial program, which utilized the TPC as an aeration device and biological contactor for treating municipal wastewater, were successful. The most promising process of the initial program was the one which incorporated the bio-lawn or RBC concept and was so encouraging that further testing was warranted. However, during the early testing program at the municipal wastewater treatment plant, wide variations in flow rates and concentrations of the primary treated sewage were encountered. Therefore, it was proposed that in order to better examine the various parameters that effect the RBC a synthetic sewage should be incorporated into the testing program. EXPERIMENTAL EQUIPMENT AND PROCEDURES Various synthetic sewages and test programs that utilize such sewage were investigated. As a result of this search for a simple yet practical means of testing a waste treatment device using synthetic sewage a formula devised by the Sanitary Engineering Department at the University of Wisconsin, Madison, which utilizes dry dairy solids was formally adopted. The formula for the synthetic sewage consisted of: 1) dairy solids, which supplied the source of carbohydrates - 428 -
Object Description
Purdue Identification Number | ETRIWC196833 |
Title | Preliminary results of a new approach in the aerobic biological treatment of highly concentrated wastes |
Author | Welch, Fred M. |
Date of Original | 1968 |
Conference Title | Proceedings of the 23rd Industrial Waste Conference |
Conference Front Matter (copy and paste) | http://earchives.lib.purdue.edu/u?/engext,15314 |
Extent of Original | p. 428-437 |
Series |
Engineering extension series no. 132 Engineering bulletin v. 53, no. 2 |
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 | 2009-05-20 |
Capture Device | Fujitsu fi-5650C |
Capture Details | ScandAll 21 |
Resolution | 300 ppi |
Color Depth | 8 bit |
Description
Title | page 428 |
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 | Preliminary Results of a New Approach in the Aerobic Biological Treatment of Highly Concentrated Wastes FRED M. WELCH, Program Manager Research Division Allis-Chalmers Manufacturing Company Milwaukee, Wisconsin INTRODUCTION In the early 1960's Allis-Chalmers initiated an experimental program utilizing a device termed the Two-Phase Contactor (TPC). The Two-Pnase Contactor as the name denotes is a mass transfer device for contacting one fluid with another. In most instances this has been a liquid with a gas. The TPC consists basically of a series of rotating discs which are partially submerged in one fluid and as the discs are rotated, carry a thin film of fluid up into contact with the upper fluid. Following some successful experiments using the Two-Phase Contactor as an aeration or gas transfer device it was decided to field test a TPC in various processes for treating wastewater. Initially, two TPC units were taken to a local waste treatment plant where they were arranged to test various waste treatment processes. One series of tests required the establishment of a biological lawn or film on the discs of a TPC unit. In this manner, the rotating disc functioned as a support media for the biomass, an aeration mechanism and a controlled means for contacting the biomass with the sewage. From this description was coined the terms Rotating Biological Contactor or RBC. During the ensuing testing program which tested the efficiency of the Two-Phase Contactor as an aeration device and as a Rotating Biological Contactor, it was possible to examine and evaluate each of the proposed processes. All of the various processes tested during the initial program, which utilized the TPC as an aeration device and biological contactor for treating municipal wastewater, were successful. The most promising process of the initial program was the one which incorporated the bio-lawn or RBC concept and was so encouraging that further testing was warranted. However, during the early testing program at the municipal wastewater treatment plant, wide variations in flow rates and concentrations of the primary treated sewage were encountered. Therefore, it was proposed that in order to better examine the various parameters that effect the RBC a synthetic sewage should be incorporated into the testing program. EXPERIMENTAL EQUIPMENT AND PROCEDURES Various synthetic sewages and test programs that utilize such sewage were investigated. As a result of this search for a simple yet practical means of testing a waste treatment device using synthetic sewage a formula devised by the Sanitary Engineering Department at the University of Wisconsin, Madison, which utilizes dry dairy solids was formally adopted. The formula for the synthetic sewage consisted of: 1) dairy solids, which supplied the source of carbohydrates - 428 - |
Resolution | 300 ppi |
Color Depth | 8 bit |
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