METHOD AND APPARATUS FOR TREATING EXCRETION SEWAGE

摘要

PROBLEM TO BE SOLVED: To provide a sewage treatment method capable of enhancing the quality of treated water and reducing membrane washing cost by efficiently utilizing ozone, and a treatment apparatus capable of efficiently adapting this sewage treatment method. SOLUTION: In an excretion sewage treatment method wherein excretion sewage is biologically treated to be subjected to solid-liquid separation treatment by a solid-liquid separation device 23 and a flocculant is added to the separated soln. from the solid-liquid separation device 23 to perform the sedimentation separation of the separated soln. in a sedimentation separation tank 8 and the solid-liquid separation treatment of the soln. from the tank 8 is performed in a membrane filter device 16, accelerated oxidation treatment is performed between the sedimentation separation tank 8 and a circulating tank 13 or a membrane supply tank to the membrane filter device 16.