Abstract
A pilot-scale three-phase fluidized bed was employed for the biological treatment of actual restaurant kitchen wastewater. In the experiments, the complete mixing type was used to deal with the changeful condition of wastewater. Cement ball (CB ball) was used as media. The evaluation method of the characteristics of biological treatment, which the authors had already proposed, was applied to the treatment of the restaurant kitchen wastewater.
This system obtained a high performance for the purification of kitchen wastewater and it is concluded that ;
(1) It was confirmed that the three-phase fluidized bed was effectual in the removal of BOD, TOC and other pollutants.
(2) The volumetric BOD removal became 2, 050g·m-3·d-1, and that of TOC became 230g·m-3·d-1.
(3) The characteristics value of TOC removal for the first-order reaction was obtained as K/Km=0.0164d·m-1.
