Investigating the Effect of Ozone on the Biodegradability of Distillery Wastewater

  • G.O. Sigge Department of Food Science, Private Bag X1, Stellenbosch University, Matieland, 7600, Republic of South Africa
  • J. Green Department of Food Science, Private Bag X1, Stellenbosch University, Matieland, 7600, Republic of South Africa
  • K.R. du Plessis ARC Infruitec-Nietvoorbij, Private Bag X5026, Stellenbosch, 7599, Republic of South Africa
  • T.J. Britz Department of Food Science, Private Bag X1, Stellenbosch University, Matieland, 7600, Republic of South Africa
DOI: https://doi.org/10.21548/28-2-1469

Abstract

The effect of ozonation on wine distillery wastewater was investigated firstly by monitoring the effect of ozonation
on the composition of the wastewater and, secondly, by investigating its effect on the biodegradability of the
wastewater. An average COD reduction of 271 mg COD.g O3
-1 was found for wastewater from a distillery pond
system. Stable microbial populations, which are found in upflow anaerobic sludge blanket (UASB) granules, were
used to determine the toxic effect of wastewater on microbial activity. Granule activity was measured in terms of
the rate of biogas and methane production, as well as cumulative biogas volume. Low ozone doses (200 to 400 mg
O3.L-1) increased granule activity in terms of biogas, methane production, and cumulative gas volumes. Distillery
wastewater reduced the activity of granules, most likely due to the presence of polyphenols and other recalcitrant
compounds in the distillery wastewater.

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Published
2016-12-13
Issue
Vol. 28 No. 2 (2007)
Section
Articles

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