The application of programmable logic controller on pH control.
Date of Publication
1999
Document Type
Bachelor's Thesis
Degree Name
Bachelor of Science in Chemical Engineering
Subject Categories
Other Chemical Engineering
College
Gokongwei College of Engineering
Department/Unit
Chemical Engineering
Abstract/Summary
The control of pH plays an important role in wastewater treatment, cell growth rate in biological processes and other chemical processes. Despite the difficulties encountered in controlling pH due to its highly non-linear behavior, it is very necessary to control this in order to cope with the increasing demands of product quality, process productivity and environmental impact.
This study deals with the application of Programmable Logic Controller on the control of pH. The PLC was programmed through the use of Allen Bradley software in the computer. A circuit was added to the system for the adjustment and comparison between the set point of the pH and actual pH due to incapability of PLC to compare the actual pH with the set pH. A pH-voltage calibration curve was plotted to determine the equivalent voltage of a specific pH.
The experiment consists of two parts. The first is the continuous process and the second is the batch process. The experimentation is done by changing the percent maximum flow of the metering pump, the kind of controller and by introducing an impulse disturbance.
The results of the experiment showed that the PLC used can not effectively control the pH.
Abstract Format
html
Language
English
Format
Accession Number
TU09556
Shelf Location
Archives, The Learning Commons, 12F, Henry Sy Sr. Hall
Physical Description
85 leaves ; Computer print-out.
Keywords
Programmable controllers; Sewage--Purification; Sewage disposal plants.
Recommended Citation
Cruz, S. P., Gonzales, F. B., & Lee, J. B. (1999). The application of programmable logic controller on pH control.. Retrieved from https://animorepository.dlsu.edu.ph/etd_bachelors/10298
