標題: Automatic control for chemical dosing in laboratory-scale coagulation process by using an optical monitor
作者: Huang, CP
Liu, CB
交大名義發表
環境工程研究所
National Chiao Tung University
Institute of Environmental Engineering
關鍵字: alum;coagulation;photometric dispersion analyzer;automatic control
公開日期: 1-八月-1996
摘要: The feasibility of applying an optical monitor in the automatic control of coagulation was assessed in this study. Prior to simulation testing, a series of batch tests was performed to determine the optimum state of dosing corresponding to the monitor's output. The results indicate that floc density decreased as floc size increased under the same coagulant dosage. Moreover, ratio output of the monitor could provide an index for evaluating the change trend of flee size in flocculation and for predicting the potential of flee settling. An automatic control system was designed and connected to a laboratory-scale water treatment process. A computer in the automatic control system received all the ratio values with respect to the progressive dosing. After determining the dosage, the system terminated the function of control. This control system started performing a new test for determining another optimum dosage when the fluctuation of inflow turbidity was more than a designated value. Simulation tests demonstrated that the PDA monitor with a designed control system could be successfully applied in the on-line control of coagulation dosing. The recommended control parameters for the control system was also identified. Copyright (C) 1996 Elsevier Science Ltd
URI: http://dx.doi.org/10.1016/0043-1354(96)00068-1
http://hdl.handle.net/11536/1136
ISSN: 0043-1354
DOI: 10.1016/0043-1354(96)00068-1
期刊: WATER RESEARCH
Volume: 30
Issue: 8
起始頁: 1924
結束頁: 1929
顯示於類別:期刊論文


文件中的檔案:

  1. A1996VB04500021.pdf