Abstract

ESCALERA, Ramiro; HOSSE PASTOR, Uli Nicol  and  CASTILLO, Sara. REMOVAL OF ORGANIC MATTER FROM TEXTILE INDUSTRY WASTEWATER BY SYNTHESIZED POTASSIUM FERRATE. Inv. y Des. [online]. 2022, vol.22, n.1, pp.5-13.  Epub July 30, 2022. ISSN 2518-4431.  https://doi.org/10.23881/idupbo.022.1-1i.

This study investigated the use of synthesized potassium ferrate as a treatment option for the removal of organic matter (COD) and color contained in wastewater from a fabric dyeing and washing plant. The industrial organic dyes used in the process are: Reactive blue 19, Allura red and Reactive black 5. As a result of an experimental design at room temperature, an optimal dose of ferrate ion of approximately 90 mg-FeO4 2-/l was found at a pH = 7, conditions that generated a removal efficiency of soluble COD of 82%. The color removal efficiency was greater than 80% at pH = 7 and a ferrate ion dose of 120 mg/l. The coagulation-flocculation process takes 21 min; i.e. 1 min of rapid agitation and 20 min of slow and controlled agitation at a shear rate of 33 s-1. The critical sedimentation velocity of the formed flocs was 3.5 cm/min under optimal conditions. With this velocity, settlers with a surface load of 50.4 m3/m2/d can be designed, which is higher than the values ​​commonly used in the design of settlers in water clarification plants intended for human consumption. In conclusion, the study shows that the use of potassium ferrate as a coagulant and oxidant is effective for the removal of organic matter and the discoloration of wastewater from the textile industry.

Keywords : Potassium Ferrate; Textile Industry Wastewater Treatment; COD Removal; Discoloration; Settling Velocity.

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