Investigating the Effect of Ozone on the Biodegradability of Distillery Wastewater

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 O 3 -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 O 3 .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.

Effect of ozonation on biodegradability enhancement and biomethanation potential of pretreatment process wastewaters from 2G ethanol production

“…Additionally, ozone promotes oxidative destruction of several organic compounds and produces simpler products that are readily biodegradable 15 . Sigge et al 16 . have determined that the application of ozonation for distillery wastewater favorably enhanced methane production and cumulative gas volumes.…”

Evaluation of Physical and Chemical Pretreatment Methods to Improve Efficiency of Anaerobic Digestion of Waste Streams from Grain Processing

“…Enzymatic pretreatment is often used to improve digestibility of waste streams with high lipids content, such as dairy wastewater [11,12]. Oxidative treatment with ozone is used to remove toxic organic compounds from the waste stream and improve anaerobic digestion [13]. Electrochemical treatment is often used for the destruction of recalcitrant organics and increase BOD 5 /COD ratio [14][15][16].…”