| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a treatment method capable of realizing a practical use of a wet oxidation treatment of sludge by performing a biological treatment and a chemical treatment of wet oxidation treatment separation liquid separated at the time of treating the sludge by a wet oxidation separation method so as to remove nitrate ion and phosphorus. SOLUTION: A wet oxidation treatment separation liquid obtained by adding a nitrate reducing fungus in a nitrate reduction treatment tank 26 so as to reduce a nitrate ion in a liquid to a nitrite ion and a wet oxidation treatment separation liquid obtained by adding a sulfide ion in a sulfide ion dissolving tank 33 so as to reduce a nitrate ion to an ammonium ion are mixed so as to form a ammonium nitrite solution, and this solution is retained in an anaerobic ammonia oxidation treatment tank 42 so as to remove a molecular nitrogen from the solution and the residue of components of the solution is treated by a sewage treatment system.</p> |
