| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an ammonia solution treating method adopting an activated sludge process which makes a high-load treatment possible, facilitates an operation management, maintenance and inspection of an activated sludge facility and uses high-concentration oxygen-containing gas. SOLUTION: The method of introducing the ammonia solution 10 generated from a coke furnace into an aerator 1 and subjecting the ammonia solution to an activated sludge treatment, comprises steps of extracting a portion of the activated sludge in the aerator 1, injecting the high-concentration oxygen- containing gas 11 therein to form the enriched oxygen activated sludge, then jetting and circulating the activated sludge in the aerator 1, measuring the concentration of dissolved oxygen in the vessel, regulating the concentration of the dissolved oxygen so as to attain a prescribed value, expelling the carbon dioxide formed by decomposition of the organic matter contained in the ammonia solution by diffusion of air or nitrogen and performing the activated sludge treatment at a prescribed pH.</p> |
