Digestive sludge desorbed liquid treatment method, its treatment equipment, wastewater treatment method and wastewater treatment equipment

摘要

To provide a method for treating digested sludge desorption liquid capable of stably treating digested sludge desorption liquid over a long term (nitrification and denitrification) using an aerobic granule, a treatment apparatus thereof, a wastewater treatment method and a waste water treatment apparatus.SOLUTION: A treatment apparatus for digested sludge desorption liquid comprises: an aerobic granule treatment tank 8; supply paths 26 and 17 for supplying digested sludge desorption liquid and concentrated dehydrated separation liquid of initial precipitation sludge to the aerobic granule treatment tank 8, respectively; an ammonia meter 27 and a TOC meter 18 as concentration measuring means for measuring the nitrogen concentration of the digested sludge desorption liquid and the carbon concentration of the concentrated dehydrated separation liquid of the initial precipitation sludge, respectively; and control means 30 for controlling the supply amount of the concentrated dehydrated separation liquid of the initial precipitation sludge so that the values of the carbon concentrationitrogen concentration are in a predetermined range.SELECTED DRAWING: Figure 1