Coagulation-flocculation constitute the backbone process in most water and wastewater treatment plants. This study focused on determining optimum coagulant dose for moringa oleifera seed extract, zeolite, ferric chloride, chitosan aluminium sulphate coagulants through coagulation, flocculation sedimentation process. It also ascertain which has potential higher removal of Cd, Cu, Fe, Mn, Pb Zn. ...

Abstract Iran's most important iron ore mine is located in the central region, and because of water shortage this area, need to reuse effluent from essential. On other hand, there are no suitable conditions for treating large volumes Iran. For reason, produced should be reduced returned consumption cycle by using appropriate technology. This study aimed investigate ozonation/lime effect on poly...

The city of Tulear is undergoing environmental degradation. wastewater heavily polluted, the average values observed for biological oxygen demand (282,347 ± 76,907 mg.L-1), chemical (579,302 161,102 and suspended solids (859,114 816,707 mg.L-1) are above standard discharge values. This study allowed us to design a treatment system make technical, economic, social assessment plant. Thus, method ...

Abstract A data-based multivariate method such as response surface methods and desirability function is considered advantageous for analysing coagulation treatment optimization. Thus, this study investigated the optimization of coagulation–flocculation using methodology. The parameters were pH, alum dose alkalinity. optimum conditions individual responses: turbidity, colour, residual aluminium ...

The aim of the study was to estimate effectiveness ultrasonic coagulation aiding. effect ultrasound exposure alone and associated systems (ultrasound exposure/coagulant) on contamination natural water examined. evaluation test results based changes in indicators, such as TOC, color, turbidity, electrokinetic potential. Three different coagulants were used tests systems. included basic processes...

Most analyses of Brownian flocculation apply to conditions where London-van der Waals attractive forces cause particles to be strongly bound in a deep interparticle potential well. In this paper, results are reported that show the interaction between primary- and secondary-minimum flocculation when the interparticle potential curve reflects both attractive and electrostatic repulsive forces. Th...

The flocculation of silica by coagulation with hydrolyzed aluminum salt and the flocculation of aluminum salt in the presence of organic acids at pH 6.5 have been studied by using Small-Angle X-ray Scattering. The flocculation of silica at pH 4.5 by isolated All3 is very similar to its flocculation by nonhydrolyzable salt as Ca++; the fractal dimension Df of the flocs is 2.20. At pH 7.5, Al13 i...

This study investigated two methods for the removal of COD and colour from sanitary landfill leachates. The first method involved the use of coagulation/flocculation process using FeCl3 as a conventional coagulant and Ca(OH)2 as base-precipitant. The second method involved integration of Fenton’s reagent into the coagulation/flocculation process. Concentration of FeCl3 that reduced chemical oxy...

The aim of this work is to investigate the enhancement UVC-based tertiary treatments; for purpose, real wastewater treatment plant (WWTP) effluent was spiked with a model pollutant, namely acetaminophen. UVC irradiation resulted in some photodegradation acetaminophen, which enhanced upon addition hydrogen peroxide (11 mM), but higher amounts oxidizing agent no significant acceleration process. ...