| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a sludge treatment method capable of preventing the re-elution of phosphorus in a biological reaction tank and capable of recovering sludge having a high concentration of phosphorus to remove the same. <P>SOLUTION: In a composite treatment system for sewage A and sludge having the biological reaction tank 1 for treating organic sewage by microbial action and solubilizing generated excess sludge E to form a solubilized sludge solution and returning this solution to the biological reaction tank 1 to biologically treat the excess sludge E, acid treatment and physicochemical treatment are used in the solubilization of the excess sludge E to perform the solubilization of sludge and the discharge of phosphorus. <P>COPYRIGHT: (C)2003,JPO</p> |
