The following means are proposed for the utilization of waste edible oil : forward to other shops, blend with stock feed, make into soaps, quenching oil, manure, paint and ink and fuel. This paper presents the effects on foaming ability and detergency of soap made from waste edi ble oil and on the growth of aquatic life.
Anisidine and carbonyl values of soap prepared at room temperature for 34 d from waste edible oil were markedly higher than those of waste edible oil. The foaming ability of waste edible oil soap was slightly less than market soap, but the detergency of soap was the same in all cases. There were no-market soap and waste edible oil soap on the flora of microorganism in river water. The inhibitory action of waste edible oil soap to wards Oryzias latipes (himedaka) growth was very weak.
