| 摘要 |
<p>PURPOSE:To simultaneously remove the materials to be treated by controlling the aerobic condition necessary for the treatment based on the oxidation- reduction potential value and dissolved oxygen value in a treating vessel. CONSTITUTION:An oxidation-reduction electrometer 11 and a dissolved oxygen meter 12 are set in a nitration vessel 4, the respective values detected at all times are compared with the values programmed in a controller 13, only the amt. of air necessary for the nitration vessel 4 is supplied based on the result, and the oxidation of org. matter, adsorption, nitration, intake of phosphorus, etc., are carried out. In the succeeding denitrification vessel, the endogenous nitrogen as nitrate nitrogen and phosphorus are liberated, phosphorous is again taken in a reaeration vessel, and org. matter, phosphorus, etc., are simultaneously removed.</p> |
