Abstract
Coagulation-flocculation process is one of the first step of wastewater treatment. Coagulant aid as flocculant material is an essential for it's treatment successfully as an important factor for the next step processes. Although, flocculant fron unnatural polymer have potentially to cause environmental contamination and may affect to human health due to its persistent in environment and difficulties to degraded. This paper examines some of the natural flocculants that have been developed and their potential used to wastewater treatment. A type of natural flocculant that is widely developed to treat wastewater is cassava starch. Plant seed extracts such as fromPlantago ovatawere able to remove turbidity was > 90% at pH 6-8. Flour ofMoringa oleiferaLam seeds are used to treat various types of wastewater with the ability to remove color and turbidity was > 90%.Tamarindus indicapods seed, able to remove golden yellow was 60% and was 25% for direct fast scarlet. The latest development was used durio seed to treat leachate that showed high potential as natural flocculant. Natural flocculant application for water and wastewater treatment is able to decrease of energy using to production and commercialization of it.
Highlights
Wastewater treatment with coagulationflocculation system is still used as a common method for both large and small scale
Inorganic or unnatural flocculant are widely used, but several cases are frequently reported
Some natural flocculant was derived from plant such as from Casava starch, Moringa oleifera seed, Plantago ovata seed, Cassia obtusifolia seed, Surjana seed, Maize seed, Tamarindus indica seed, Jatropha curcas seed, Strychnos potatorum nut, extracted pandan leaves Corn flour and durio starch etc
Summary
Wastewater treatment with coagulationflocculation system is still used as a common method for both large and small scale. This is done because it is an effective method as pre treatment to lighten the treatment [1]. Coagulant type and flocculant is one of important factor [2]. Inorganic or unnatural flocculant are widely used, but several cases are frequently reported Natural plant and animalderived flocculant can provide a potential alternative for the treatment of wastewater. This paper was focused to discuss of natural flocculant from some plants
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