Self-Tuning Pid (STPID) Control of pH in Recovering Process of Magnesium Hydroxide (Mg(OH)2) by Coagulation From Salt

The salt obtained from the salt sources are not desirable purity level and contains some impurities. In the scope of this study, coagulation of magnesium hydroxide (Mg(OH)2) in pH control has been carried out by adding sodium hydroxide (NaOH) to magnesium chloride (MgCl2) and by this way recovery process has been achieved by Self Tuning PID Control. To provide the best coagulation pH 11 has been obtained as optimum pH value in consideration of the performed calculations.

Keywords:

Coagulation, Brine, Self-Tuning PID Control pH control,

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Bayram, İ. “Removal of Major Impurties (Ca-Mg) of Brine with Chemical Treatment Process in the Salt Sector”. International Scientific and Vocational Journal, 2(2):57-66, 2018
Kılıç, Ö., Kılıç A.M. ve Uyanık Z., ‘‘Tuz Gölü’nden Tuz Yan Ürünleri Üretimi/Araştırılması’’, s. 321, 2001.
Ergin, Z. “Tuzun üretim Teknolojisi ve İnsan Sağlığındaki Yeri”, 1988.
Turek, M., and Gnot, W., “Precipitation of Magnesium Hydroxide from Brine”, 34- 244-250, 1995.
Lartey, R., B., “Recovery of useful chemicals from local salt bitterns”, Journal of Applied Science and Technology, Vol.2, Nos 1&2, 77-84, 1997.
Alamdiri, A. and Rahimpour, M.R. “Kinetics of Magnesium Hidroxide Precipitation from Sea Bittern”, 47, 215-221, 2007.
I.F. White and T.F. O’Brien, ‘‘Secondary Brine Treatment: Ion-Exchange Purification of Brine’’. Modern Chlor-Alkali Technology, vol.4, p.271, 1990.
Huang, C.C. Su, C.Y. and Yu, W.H. “Self-Tuning Control in Dyeing”, 70, 195, 2000.
Tan, K.K., Huang, S. and Ferdous, R. “Robust Self-Tuning PID Controller for Nonlinear System”, Journal of Process Control, 12, 753-761, 2002.
Ali, E. “pH Control Using PID Control Algorithms with Automatic Tuning Method”. Chemical Engineering Research and Design,79, 611-620, 2001.
Alpbaz, M., Hapoğlu, H., Özkan, G. and Altuntaş, S. “Application of Self-Tuning PID Control to a Reactor of Limestone Slurry Titrated”, Chemical Engineering Journal, 116, 19-24, 2006.