Research Article Open Access

Combine Ozonation Treatment Followed by Biological Treatment to Anaerobically Digested Spentwash

Abstract

Experiments were conducted with Ozone, Ozone–UV, and H2O2 -UV radiation process. Ozone treatment (flow 0.3 m3/hr for 30 min) reduces ADSW 47% COD and 62% color. Ozone with H2O2 obtained 61% COD and 85% color reduction. ADSW exposed to ozone together with H2O2 and UV radiation over all COD and color reduction observed was 68% and 88% respectively. Biodegradability (BOD (3)) in the ADSW effluent increased by 17% when, treated with ozone and hydrogen peroxide. Maximum BOD enhances 25.6% by Ozone in combination with UV and H2O2 treatment. UV-Ozone alone treatment enhances 22% and 20% BOD. Increase in BOD indicates, recalcitrant organic material becomes biodegradable. Pretreated (ADSW) with Optimized combine Ozonation-H2O2-UV treatment was examined using aerobic treatment. Combine ozonation pre-treatment reduces 42% color and 67% COD. Without ozonation pre-treatment 15% color reduction and 31% COD reduction was observed.

Hemangi Kolte, Apeksha Walke, Deepali Nimbakar, Vikram Ghole

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