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Section 13. MISCELLANEOUS WASTES THE DYNAMICS OF AUTOMATED EQUALIZATION BASIN-REACTOR SYSTEMS Boris Khudenko, Assistant Professor Department of Civil Engineering Wayne State University Detroit, Michigan 48202 An important feature of wastewater treatment processes is the significant variabdity of input parameters. In continuous flow technological units (reactors, separators, etc.) this may result in a substantial decrease in the efficiency of treatment processes from that required and attainable by virtue of the physical principles that are employed in the process. Under such conditions, adequate control of the efficiency of the treatment processes can be achieved by the employment of equalization basins, automatic control systems, or a combination of the two. The selection of control means and the determination of their parameters depends on (a) the variabdity of input parameters, (b) the dynamic properties of equalization basin, reactor, and automatic control system, and (c) the required characteristics of output parameters. For purposes of optimal design, these three concepts must be quantitatively defined. On the basis of this information, the propagation of various disturbance signals through equalization basins and reactors can be analyzed. Such analysis establishes the basis for optimal design (synthesis) of treatment systems. The problem of the opitmal design of dynamic systems can be formulated as follows: for given variations of input parameters and required stabdity of output parameters, the process must be designed in such a way that the required stability of output parameters is satisfied and expenses are minimized. Various optimization problems can be considered. In general, monetary expenses must be minimized. In practice, this is usually reduced to the following most important cases: (a) determination of the optimal distribution of the dynamic load between reactor and equalization basin, (b) distribution of the total volume of tanks between reactor and equalization basin, (c) minimization of consumption of reagents in the equalization tank-reactor system. Based on literature review and the author's experience, this paper presents methods of analysis for input and output parameters, methods of analysis of dynamic response of major elements of treatment systems, and illustrates the application of these principles to design problems. Only linear processes are discussed herein; in particular, reagent treatment of monocomponent wastewater when chemical processes are instantaneous or can be described by linear or linearizable kinetic equations. However, the principles discussed can also be applied to the analysis and design of more complex systems. MAJOR RELATIONSHIPS IN THE DYNAMIC ANALYSIS OF TREATMENT SYSTEMS Variations of Input Parameters The fluctuations of input parameters are attributable to a wride variety of sources. However, these fluctuations can be classified into the following five types of variations: 1. shock changes (eat., from the discharge of a batch of wastewater); 2. sudden changes (cat., due to prolonged changes in the processes generating wastewater): 3. cyclic oscillation* (e.g.. caused by the periodicity of technological processes); 768
Object Description
Purdue Identification Number | ETRIWC198076 |
Title | Dynamics of automated equalization basin-reactor systems |
Author | Khudenko, Boris |
Date of Original | 1980 |
Conference Title | Proceedings of the 35th Industrial Waste Conference |
Conference Front Matter (copy and paste) | http://earchives.lib.purdue.edu/u?/engext,31542 |
Extent of Original | p. 768-787 |
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 | 2009-10-22 |
Capture Device | Fujitsu fi-5650C |
Capture Details | ScandAll 21 |
Resolution | 300 ppi |
Color Depth | 8 bit |
Description
Title | page 768 |
Collection Title | Engineering Technical Reports Collection, Purdue University |
Repository | Purdue University Libraries |
Rights Statement | Digital copyright Purdue University. All rights reserved. |
Language | eng |
Type (DCMI) | text |
Format | JP2 |
Capture Device | Fujitsu fi-5650C |
Capture Details | ScandAll 21 |
Transcript | Section 13. MISCELLANEOUS WASTES THE DYNAMICS OF AUTOMATED EQUALIZATION BASIN-REACTOR SYSTEMS Boris Khudenko, Assistant Professor Department of Civil Engineering Wayne State University Detroit, Michigan 48202 An important feature of wastewater treatment processes is the significant variabdity of input parameters. In continuous flow technological units (reactors, separators, etc.) this may result in a substantial decrease in the efficiency of treatment processes from that required and attainable by virtue of the physical principles that are employed in the process. Under such conditions, adequate control of the efficiency of the treatment processes can be achieved by the employment of equalization basins, automatic control systems, or a combination of the two. The selection of control means and the determination of their parameters depends on (a) the variabdity of input parameters, (b) the dynamic properties of equalization basin, reactor, and automatic control system, and (c) the required characteristics of output parameters. For purposes of optimal design, these three concepts must be quantitatively defined. On the basis of this information, the propagation of various disturbance signals through equalization basins and reactors can be analyzed. Such analysis establishes the basis for optimal design (synthesis) of treatment systems. The problem of the opitmal design of dynamic systems can be formulated as follows: for given variations of input parameters and required stabdity of output parameters, the process must be designed in such a way that the required stability of output parameters is satisfied and expenses are minimized. Various optimization problems can be considered. In general, monetary expenses must be minimized. In practice, this is usually reduced to the following most important cases: (a) determination of the optimal distribution of the dynamic load between reactor and equalization basin, (b) distribution of the total volume of tanks between reactor and equalization basin, (c) minimization of consumption of reagents in the equalization tank-reactor system. Based on literature review and the author's experience, this paper presents methods of analysis for input and output parameters, methods of analysis of dynamic response of major elements of treatment systems, and illustrates the application of these principles to design problems. Only linear processes are discussed herein; in particular, reagent treatment of monocomponent wastewater when chemical processes are instantaneous or can be described by linear or linearizable kinetic equations. However, the principles discussed can also be applied to the analysis and design of more complex systems. MAJOR RELATIONSHIPS IN THE DYNAMIC ANALYSIS OF TREATMENT SYSTEMS Variations of Input Parameters The fluctuations of input parameters are attributable to a wride variety of sources. However, these fluctuations can be classified into the following five types of variations: 1. shock changes (eat., from the discharge of a batch of wastewater); 2. sudden changes (cat., due to prolonged changes in the processes generating wastewater): 3. cyclic oscillation* (e.g.. caused by the periodicity of technological processes); 768 |
Resolution | 300 ppi |
Color Depth | 8 bit |
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