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The Physical Design of Biological Towers THOMAS S. ALLEN, Sales Manager ROBERT P. KINGSBURY, Sales Manager Environmental Control Division Ethyl Corporation Baton Rouge, Lousiana 70801 INTRODUCTION In the ten years from 1960 to 1970 a new process for the secondary treatment of municipal and industrial effluents appeared on the waste treatment scene in this country and abroad. This process, that is referred to as a biological tower, is in fact a direct descended of the well known rock trickling filter. A number of papers have been given by these writers (1,2,3,4) and others (5,6,7,8,9) to differentiate what they can accomplish, how they can be expected to perform on a variety of wastes, and how they should be sized from a process standpoint. What has been largely lacking is information relating to the translation of the process specifications to the physical design of the tower. This paper is intended to be a first step towards filling this need. It will not at any point recommend a specific method of tower construction, but rather will show with specific examples how a representative number of towers from all over the world have been constructed. The authors have in fact functioned only to collect, organize, and present the engineering details from consulting engineers and engineering companies throughout the world. The authors are.indebted to the contributing consultants who have given their permission for the use of their designs in this paper. A complete list of these consultants together with location of their tower designs is presented in Table I. This paper breaks down the functions of the various parts of the tower and tries to illustrate with specific designs varying approaches to handling the different particular functions. Thus a particular tower may be included only to show how one engineer designed to distribute waste over the biological media. During the paper's preparation, thought was given to summarizing the results of the operating towers included. This proved to be an involved and lengthy presentation. As a result no operating data on any of the towers is included. Many of the towers covered, however, have been reported elsewhere from a process standpoint and references have been cited. When this paper was prepared, the number of biological towers operating on a worldwide basis was estimated to be about 400 with over 100 in the U.S. Towers were selected for this paper to represent the widest possible engineering and construction variations. Following this scheme, tower design features have been included from four countries. This paper is limited to aerobic towers packed with rigid modules of high surface and low density per cubic foot. A "state of the art" paper should also cover the very latest thinking in tower design. This has been done by including several towers which have been designed but not yet constructed. Some of the features shown on these towers have never been used before, but represent current solutions to biological tower design problems developed by the concerned engineers. Certainly most engineers involved in tower design today will recognize that the field is rapidly changing. This paper, developed with the cooperation of many of the involved 462
Object Description
Purdue Identification Number | ETRIWC197341 |
Title | Physical design of biological towers |
Author |
Allen, Thomas S. Kingsbury, Robert P. |
Date of Original | 1973 |
Conference Title | Proceedings of the 28th Industrial Waste Conference |
Conference Front Matter (copy and paste) | http://earchives.lib.purdue.edu/u?/engext,23197 |
Extent of Original | p. 462-482 |
Series | Engineering extension series no. 142 |
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 | 2009-06-02 |
Capture Device | Fujitsu fi-5650C |
Capture Details | ScandAll 21 |
Resolution | 300 ppi |
Color Depth | 8 bit |
Description
Title | page 462 |
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 Physical Design of Biological Towers THOMAS S. ALLEN, Sales Manager ROBERT P. KINGSBURY, Sales Manager Environmental Control Division Ethyl Corporation Baton Rouge, Lousiana 70801 INTRODUCTION In the ten years from 1960 to 1970 a new process for the secondary treatment of municipal and industrial effluents appeared on the waste treatment scene in this country and abroad. This process, that is referred to as a biological tower, is in fact a direct descended of the well known rock trickling filter. A number of papers have been given by these writers (1,2,3,4) and others (5,6,7,8,9) to differentiate what they can accomplish, how they can be expected to perform on a variety of wastes, and how they should be sized from a process standpoint. What has been largely lacking is information relating to the translation of the process specifications to the physical design of the tower. This paper is intended to be a first step towards filling this need. It will not at any point recommend a specific method of tower construction, but rather will show with specific examples how a representative number of towers from all over the world have been constructed. The authors have in fact functioned only to collect, organize, and present the engineering details from consulting engineers and engineering companies throughout the world. The authors are.indebted to the contributing consultants who have given their permission for the use of their designs in this paper. A complete list of these consultants together with location of their tower designs is presented in Table I. This paper breaks down the functions of the various parts of the tower and tries to illustrate with specific designs varying approaches to handling the different particular functions. Thus a particular tower may be included only to show how one engineer designed to distribute waste over the biological media. During the paper's preparation, thought was given to summarizing the results of the operating towers included. This proved to be an involved and lengthy presentation. As a result no operating data on any of the towers is included. Many of the towers covered, however, have been reported elsewhere from a process standpoint and references have been cited. When this paper was prepared, the number of biological towers operating on a worldwide basis was estimated to be about 400 with over 100 in the U.S. Towers were selected for this paper to represent the widest possible engineering and construction variations. Following this scheme, tower design features have been included from four countries. This paper is limited to aerobic towers packed with rigid modules of high surface and low density per cubic foot. A "state of the art" paper should also cover the very latest thinking in tower design. This has been done by including several towers which have been designed but not yet constructed. Some of the features shown on these towers have never been used before, but represent current solutions to biological tower design problems developed by the concerned engineers. Certainly most engineers involved in tower design today will recognize that the field is rapidly changing. This paper, developed with the cooperation of many of the involved 462 |
Resolution | 300 ppi |
Color Depth | 8 bit |
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