Effect of fatty oil dispersion on oil-containing wastewater treatment.
The performance of an immobilized continuous fluidized reactor for salad oil-containing model wastewater was examined at a high loading rate using polyurethane as a support, to be applied in fat- and oil-containing wastewater treatment, generated by daily activities in restaurant kitchens. At an organic loading rate higher than 0.6 kg/m3/day, there was a significant amount of white solid (WS), identified as a mixture of calcium di-stearate and di-palmitate, suggesting that saturated fatty acid degradation was limited at such a high loading rate, possibly due to its solubility in the wastewater. Increased oil dispersion by the addition of a surfactant ranging from 10 to 100 microm particle size could result in less than 30 mg/l oil concentration after the treatment at 5 kg/m3/day.
Matsui
Toru
T
Center of Molecular Biosciences, University of Ryukyus, 1 Sembaru, Nishihara-cho, Okinawa 903-0213, Japan. tmatsui@comb.u-ryukyu.ac.jp
Miura
Akira
A
Iiyama
Toshio
T
Shinzato
Naoya
N
Matsuda
Hitoshi
H
Furuhashi
Keizo
K
D005227:Fatty Acids / Q000737:chemistry*; D010938:Plant Oils / Q000032:analysis*; D012147:Restaurants; D013501:Surface-Active Agents / Q000737:chemistry; D014865:Waste Disposal, Fluid / Q000379:methods*
D005227:Fatty Acids; D010938:Plant Oils; D013501:Surface-Active Agents