| 摘要 |
<p>PURPOSE:To obtain the high-performance activated sludge treatment controller having high performance by arithmetically processing both of the measured ORP value and measured MLSS value in the fore stage part of an aeration tank to execute feed forward control of a blast rate and making arithmetic processing based on the deviation value between the measured DO value and set DO value in the rear stage of the aeration tank to execute feed back control of the blast rate. CONSTITUTION:This feed forward and feed back control system for aeration air quantity is constituted of an arithmetic mechanism which is installed with one to plural ORP meters 5 in the fore stage or the fore and rear stages of the aeration tank 1, an MLSS meter 6 in the central part and a DO meter 5 in the rear stage and calculates the aeration air quantity by arithmetic equation using the measured ORP and MLSS values, an existing arithmetic mechanism which calculates the aeration air quantity by the deviation between the set value and measured value of the DO and a fan or the like which can be controlled to the calculated aeration air quantity.</p> |
