LAUNDRY WASTEWATER BIOLOGICAL TREATMENT PREPARATION, AND DEVICE AND METHOD FOR TREATING LAUNDRY WASTEWATER BY USING SAME

摘要

The present invention comprises: a laundry wastewater tank (12) that temporarily stores laundry wastewater (11) from a plant facility; a biological treatment tank (14) in which the laundry wastewater (11) from the laundry wastewater tank (12) is aerated and mixed with activated sludge; a treated water tank (16) that stores the treated laundry wastewater (15) that has been biologically treated; and a treatment preparation supplying device (22) that supplies a laundry wastewater biological treatment preparation (21) to the biological treatment tank (14). The laundry wastewater biological treatment preparation (21) is introduced when a change in water quality that deteriorates the biological treatment in the biological treatment tank (14) is detected. Thus, biological treatment can be performed stably.