Optimisation of using a blend of plant based natural and synthetic coagulants for water treatment: (Moringa Oleifera-Cactus Opuntia-alum blend)

•Coagulation of raw water to reduce turbidity using the individual coagulants.•Use of a blend of the natural and synthetic coagulants for turbidity reduction.•Use of lab tests to deduce if the pH, alkalinity electrical conductivity and turbidity are within desired limits for portable water standards.•Optimization to deduce the optimal concentrations of the blend for maximum turbidity reduction.