Biodegradability of ozonation products as a function of COD and DOC elimination by example of substituted aromatic substances
- 31 October 1987
- journal article
- Published by Elsevier BV in Water Research
- Vol. 21 (10), 1273-1278
- https://doi.org/10.1016/0043-1354(87)90180-1
Abstract
Ozone pretreatment studies of nonbiodegradable substituted aromatic compounds were conducted to evaluate the effects of ozonation on the biodegradability of the oxidation products as a function of COD- DOC-elimination and ozone consumption. In the case of substituted aromatic compounds a 60–70% decrease of the COD-value and a 30–40% decrease of the DOC-value lead to biodegradable products (BOD5-/COD = 0.4) independent of the pH and the initial concentration of compounds. To reach good biodegradability of the oxidation products 3 mg ozone on average per 1 mg initial DOC are necessary.Keywords
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