Journal
OZONE-SCIENCE & ENGINEERING
Volume 30, Issue 1, Pages 105-110Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/01919510701817914
Keywords
ozone; biodegradability; molecular weight distribution; recalcitrant organic matter; advanced oxidation; pulp and paper wastewater
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The impact of ozone oxidation on removing high molecular weight (HMW) organics in order to improve the biodegradability of alkaline bleach plant effluent was investigated using a semi-batch reactor under different initial pH (12 and 7). After the ozonation process, the ratio of BOD5/COD increased from 0.07 to 0.16 and 0.22 for initial pH 12 and 7, respectively. Also, the effluent color decreased by 48% and 61% at initial pH 12 and pH 7, respectively. These changes were primarily driven by reductions of the HMW fractions of the effluent during ozonation.
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