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Evaluation of Fenton Reagent Treatment to Anaerobically Digested Spentwash in Combination with Biological Treatment

Hemangi Kolte, Amruta Wadake, Deepali Nimbakar, Vikram Ghole

Applicability of Fenton treatment on anaerobically digested spentwash (ADSW) was investigated for chemical oxygen demand (COD) and color reduction. Effect of pH and variable doses of Fenton‟s reagent for COD and color removal was investigated. Overall experiments obtained 71 % COD and 75 % color reduction. Subsequently, an optimized Fenton dose was employed to carry out adsorption experiment to study the effect of adsorption on COD and color reduction. Adsorption reduces COD in the range of 45 to 55% in ash, 8 to 17 % in coco pith, 30 to 51% in bagasse and 39 to 60 % in charcoal. Similarly color reduction was found to be 10 to 40 % in ash, only 8% in coco pit, 7 to 32 % in bagasse and 15 to 65 % in charcoal. Adsorption removes 44% color reduction and 65 % COD.