Removal of turbidity and color in domestic wastewater using aqueous seed extract of Cassia fistula

Many substances of plant origin are extracted for use in the primary treatment domestic wastewater. In most cases, they used as coagulating and flocculating agents derived from seeds, leaves, bark or sap, roots, fruits trees plants. this research, Cassia fistula seed was evaluated removal turbidity color wastewater a pumping station city Cartagena (Colombia). The optimal dose C. powder determined by jar test using an E&Q F6-300 digital flocculator. Physicochemical parameters such were determined, following recommendations APHA (Standard Methods Water Wastewater), expressing results UNT (Total Nephelometric Units) turbidity, UPt-Co (Platinum-Cobalt color. obtained show that with 160 mgL-1 coagulant seed, value 34.14 NTU is reached 62.18% respect to initial value. decreases reaching minimum 88.59 UPC 64%, at natural coagulant. exhibited good properties low doses can be important alternative wastewater.
 Keywords: color, removal, water treatment.