Potential of Natural Flocculant in Coagulation-Flocculation Wastewater Treatment Process

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 from Plantago ovata were able to remove turbidity was > 90% at pH 6-8. Flour of Moringa oleifera Lam seeds are used to treat various types of wastewater with the ability to remove color and turbidity was > 90%. Tamarindus indica pods 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.

The Potential Use of Nephelium lappaceum Seed as Coagulant–Coagulant Aid in the Treatment of Semi-Aerobic Landfill Leachate

“…Not much significant difference was noted for SS ( Figure 10 b), where nearly 90% reduction was observed compared with 96% when SnCl 4 was used alone. A slight reduction was due to the fact that Nephelium lappaceum seed particles are large in size [ 48 , 49 ], which renders them less effective in removing SS from landfill leachate [ 50 ]. Moreover, as discussed earlier, Nephelium lappaceum seed becomes negatively charged after pH 6.…”

Evaluación de la mezcla de un coagulante químico-natural en el proceso de clarificación de una ciénaga

“…Los grupos funcionales hidroxilos (-OH) que se presentan en la estructura química del almidón de yuca (ver Figura 4), son puntos donde los coloides presentes en el agua sin tratar se unen contribuyendo a un mejor proceso de coagulación, floculación y sedimentación de estas partículas [21]. Por lo anterior, este almidón influye en la dosis del coagulante y en el tamaño de los flóculos [22].…”

“…Los gránulos de almidón se encuentran constituidos por amilosa, una cadena lineal de glucosa unida por α-1,4 glucosidasa, además de amilopectina, una cadena ramificada de glucosa con ramificaciones en posición α1,6 [21]. El contenido de amilosa oscila entre 20-25% y la cantidad de amilopectina entre 75-80%, dependiendo del peso del almidón [22].…”

The extent of reaction traced by determination ofN2content for synthesised cationic biodegradable polymer flocculant

“…Increasing nitrogen content can boost cationic charges, producing efficient anionic floc removal. [19][20][21][22][23] 2. MATERIALS AND METHODS Three effluents are used for the experiments, procured from three different CETPs.…”