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Abstract <p>This study investigates the effect of suspended matter concentration on the coagulation-flocculation and decantation treatment process of a low brackish water <i>C</i>(NaCl) = 1 g/L aiming for an effective optimization of the process using slightly brackish and turbid waters. Experiments were performed to detect the optimum performance of coagulant (Al<sub>2</sub>(SO<sub>4</sub>)<sub>3</sub>) and flocculant on pH and turbidity removal from different bentonite solutions (0.5, 1, 1.5 and 2 g/L). The effects of coagulant dose, flocculant dose, decantation type, feed rate, speed, and time of rapid and slow mixing are also investigated. The medium mixing speed and the co-current lamellar decantation were adequate to improve turbidity removal to high efficiency (99.84%). Using a TE 600 pilot plant to test the optimum experimental conditions resulting from batch experiments, showed a high yield of turbidity removal confirming an application possibility of these experimental conditions in a real treatment plant.</p>

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Treatment of Low Brackish Water by Coagulation Flocculation Technique: Effect of Bentonite on Turbidity and pH

  • 期刊论文

  • 发表日期：

    2025年2月1日

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  • Soumia Boulefred,
  • Abdelghani Chiboub Fellah,
  • Mohammed Reda Ramdani,
  • Fatema Zohra Guellil,
  • Amel Boudjemaa,
  • Khaldoun Bachari

摘要

Abstract

This study investigates the effect of suspended matter concentration on the coagulation-flocculation and decantation treatment process of a low brackish water C(NaCl) = 1 g/L aiming for an effective optimization of the process using slightly brackish and turbid waters. Experiments were performed to detect the optimum performance of coagulant (Al2(SO4)3) and flocculant on pH and turbidity removal from different bentonite solutions (0.5, 1, 1.5 and 2 g/L). The effects of coagulant dose, flocculant dose, decantation type, feed rate, speed, and time of rapid and slow mixing are also investigated. The medium mixing speed and the co-current lamellar decantation were adequate to improve turbidity removal to high efficiency (99.84%). Using a TE 600 pilot plant to test the optimum experimental conditions resulting from batch experiments, showed a high yield of turbidity removal confirming an application possibility of these experimental conditions in a real treatment plant.