Combine Ozonation Treatment Followed by Biological Treatment to Anaerobically Digested Spentwash

Abstract

Experiments were conducted with Ozone, Ozone-UV, and H 2 O 2 -UV radiation process. Ozone treatment (flow 0.3 m 3 /hr for 30 min) reduces ADSW 47% COD and 62% color. Ozone with H 2 O 2 obtained 61% COD and 85% color reduction. ADSW exposed to ozone together with H 2 O 2 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 H 2 O 2 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-H 2 O 2 -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.

Anaerobically digested spentwash degradation by application of MW assisted O3 and H2O2 process

“…This is because H 2 O 2 gets decompose in the presence of ozone into Hydroxyl radicals. They exist in solution in combination with ozone molecules at high oxidative state [22]. The combination is extremely reactive as the free radicals capable of removing atoms from oxidizable material.…”