| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To solve the problem that the frequent renewal of the standard distribution of oxygen consumption velocities is impossible because wastewater treatment must be temporarily interrupted at each time when the standard distribution is updated and the treatment state of the aeration tank can not be properly judged, in a control method of the aeration tank for measuring the oxygen consumption velocities of mixed solution of activated sludge and wastewater at a plurality of places with respect to the flow direction in a pressing-out flow type aeration tank to form the distribution of oxygen consumption velocities and comparing this distribution with the standard distribution to control the pressing-out flow type aeration tank. <P>SOLUTION: The relation between an oxygen consumption velocity under a load condition becoming a standard and time is measured using a batchwise aeration tank and the relation between the oxygen consumption velocity and the time of the batchwise aeration tank is replaced with the relation of the oxygen consumption velocity and the time of the pressing-out flow type aeration tank to form the standard distribution. By this method, the treatment state of the aeration tank can be properly judged at a low cost. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
