A fiber-optical technique to monitor the flocculation in water treatment operations

• Main Authors: Gwo-Shang Chen, 陳國聲
• Other Authors: Chihpin Huang
• Format: Others
• Language: zh-TW
• Published: 1994
• Online Access: http://ndltd.ncl.edu.tw/handle/96786852358791032901

碩士 === 國立交通大學 === 環境工程研究所 === 82 === On-line monitoring the state of coagulation/flocculation enables automatic control of coagulation process with respect to the condition of the chemical additive. A new method "Fiber- optic monitoring thehnique" as a tool has been employed to evaluate the state of flocculation, which is to measure the flutuating light intensity transmitted through a flowing suspension. The purpose of this study is to assess the feasibility for the application of monitoring the flocculation by using photometric dispersion analyzer (PDA), and to perform a series of batch flocculation tests with PDA under different conditions. The result shows that the fiber-optic technique is useful to monitor the state of aggregation with different coagulants and the variation of turbidity conditions, it provides a reliable index related to the floc size can be used in determing the optimum coagulant dosage. Nevertheless, it also can be used in the case of wastewater treatment. The result concludes that PDA is superior to streaming current detector in monitoring the state of flocculation.