High Concentration Of Ozone Application By The
DAF (Dissolved Air Flotation) System To Treat
Livestock Wastewater
Author(s)
B. H. Lee & W. C. Song
Abstract
It is known to be very difficult to treat livestock wastewater because it contains a
lot of non-biodegradable organic material. Although many technologies have
been employed to treat livestock wastewater such as ozone, AOP, Fenton, and
membrane, including various microbiological technologies, they have not been
very successful. High concentrations of ozone were applied to treat the livestock
wastewater through the DAF (Dissolved Air Flotation) system, so that the DAF
system employing ozone was named as the DOF (Dissolved Ozone Flotation)
system. Ozone was used to substitute air in the DAF system. A high
concentration of ozone provided a high potential of ozone oxidation and a high
volume of micro-bubbles. Water quality parameters are removed by the two
mechanisms of flotation and ozone oxidation. CODMn was removed partly by
flotation and partly by ozone oxidation. An average 81.1% of CODMn was
removed from 1,202mg/l to 226mg/l. Suspended solids (SS) and total
phosphorus (T-P) were removed mainly by flotation. An average 92% of SS
were removed, from 1,504mg/l to 49mg/l. 67.7% of T-N removal was also
achieved, from 112mg/l to 32mg/l. 94.6% of T-P was removed by flotation, from
97.81mg/l down to 4.2mg/l. High ozone concentration with microbiological
processes made it possible to meet the effluent standards of the livestock
wastewater treatment.
Keywords: DAF, DOF, livestock wastewater, ozone, oxidation, flotation.
Keywords
DAF, DOF, livestock wastewater, ozone, oxidation, flotation.
Related Book
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