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  • Title: Use of ozone and hydrogen peroxide in the post-treatment of UASB treated alkaline fruit cannery effluent.
    Author: Sigge GO, Britz TJ, Fouri PC, Barnardt CA, Strydom R.
    Journal: Water Sci Technol; 2001; 44(5):69-74. PubMed ID: 11695485.
    Abstract:
    UASB treatment of cannery effluents was shown to be feasible. However, the treated effluent still does not allow direct discharge to a water system and a further form of post-treatment is necessary to reduce the COD to lower than the legal limit of 75 mg/l. The use of ozone, hydrogen peroxide and granular activated carbon were used singly or in combination to assess the effectiveness as post-treatment options for the UASB treated alkaline fruit cannery effluent. Colour reduction in the effluent ranged from 15% to 92% and COD reductions of 26-91% were achieved. Combinations of ozone and hydrogen peroxide gave better results than either oxidant singly. The best results were achieved by combining ozone, hydrogen peroxide and granular activated carbon, and COD levels were reduced to levels sufficiently below the 75 mg/l limit.
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