A treatment process of waste water discharged from rice
shochu distillery with yeasts and activated sludges was developed.
he solid-liquid separation of the distillery waste water was carried out effectively by adding a filtration aid and
Geotrichum M 111 cells, which showed the ability of accelerating the aggregation of insoluble solid in the waste water. The dehydration test of aggregated waste water was made using a belt press-type dehydrator, and the best filtration rate of 33kg/m·hr was obtained. The separated filtrate was treated with the waste-treating yeast strain,
Hansenula anomala J-45-0 and 70% of BOD was removed. In addition, to remove the solid, the filtrate was subjected to the yeastlytic bacteria,
Rarobacter faecitabidus, which have lytic-ability against the strain J-45-0. Through this treatment, about 40% of solid was removed from yeast treated water. The waste water treated with
Rarobacter faecitabidus was diluted to ca. 5-10 times with water and subjected to the activated sludge treatment. The concentration of BOD in the treated waste water was decreased to be less than 30 ppm at the condition of a volumetric BOD loading rate of 0.4-1.0kg/m3·d. As the result, the waste water discharged form rice shochu distillery was clarified by the continuous process of biological treatments.
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