1. Introduction
Organic wastewater including huge amounts of animal and vegetable oils causes the decrease of processing
ability of wastewater treatment facilities. Recovering oil from wastewater prevents the blocking of the drain pipeline
and the decreases of processing ability of wastewater treatment facilities (Asakawa et al., 2010; Sato 2009; Noguchi
et al., 2011; Tsukii et al., 2008). Moreover, in a food processing factory under proper sanitary condition, recovered