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  • Title: Combining UASB technology and advanced oxidation processes (AOPs) to treat food processing wastewaters.
    Author: Sigge GO, Britz J, Fourie PC, Barnardt CA, Strydom R.
    Journal: Water Sci Technol; 2002; 45(10):329-34. PubMed ID: 12188566.
    Abstract:
    UASB treatment of fruit cannery and winery effluents was shown to be feasible. However, the treated effluents still have residual COD levels well above the legal limit of 75 mg.l(-1) for direct discharge to a water system and a form of post-treatment is necessary to reduce the COD further. Ozone and ozone/hydrogen peroxide were used in combination with a granular activated carbon contacting column to assess the effectiveness as a post-treatment option for the UASB treated fruit cannery and winery effluent. Colour reduction in the effluents ranged from 66 to 90% and COD reductions of 27-55% were achieved. The combination of ozone and hydrogen peroxide gave better results than ozonation alone. Significant progress was thus made in achieving the legal limit of 75 mg.l(-1).
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