| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide the subject waste water treatment apparatus capable of efficiently removing and recovering phosphorus especially. SOLUTION: A waste water treatment apparatus is equipped with a biological reaction tank 21 receiving waste water to biologically treat the same, a solid- liquid separation process 22 for separating the mixed liquid of the biological reaction tank 21 into treated water and sludge, an anaerobic process 23 for stirring sludge separated in the solid-liquid separation process 22 under an anaerobic condition to return the same to the biological reaction tank 21, a sludge concn. process 24 for separating a part of anaerobic sludge stirred in the anaerobic process 23 into conc. sludge and a cone. separated liquid and a phosphorus removing processes 25 for removing phosphorus from the conc. separated liquid of the sludge concn. process 24.</p> |
