Strategy for treatment of Pesticide Industrial Waste water: A Sequential approach

Abstract

The pesticide usage-increasing day-by-day in the agricultural-based counties like India. The manufacturing of these pesticides generates huge quantities of wastewater which contain toxic compounds which adversely affect the environment as well as human health. Pesticide wastewater (PWW) is characterised by wide range of organic and inorganic compounds, high acidic nature and high salt content. To treat this stereotypical effluent, a combination of biological, chemical precipitation and Advanced Oxidation Processes (AOP’s) could be employed in sequential approach. This study aims to provide a complete PWW treatment at a laboratory scale. A few techniques have been applied in combination, they are Combination-I: Distillation>fenton>anaerobic digestion>ozonation>activated carbon adsorption, Combination-II: Distillation>fenton>ozonation>anaerobic digestion >activated carbon adsorption, Combination-III: anaerobic digestion>distillation>fenton>ozonation>activated carbon adsorption have been employed and evaluated for chemical oxygen demand (COD) removal in PWW treatment. Percentage removal of COD was 99.55%, 98.67% and 99.5% respectively for Combinations I, II and III. Out of the three combinations, maximum removal was observed in Combinations I and III and all the parameters of PWW has reduced remarkably.