| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a system for controlling aeration which acquires information including weather information affecting an aeration load in real time, enables suitable aeration while maintaining a water quality and as a result, can also reduce aeration electric energy. <P>SOLUTION: Confluent sewage combining rainwater is introduced into an aeration tank 11 and aeration is carried out to the introduced sewage. The dissolved oxygen concentration of water to be treated which is aerated in the aeration tank 11 is measured by a dissolved oxygen meter. The predicted rainfall amount in mesh units at a drainage area where the rainwater flows out to the confluent sewage is inputted from a weather information system 17, the inflow amount of the confluent sewage is predicted, and aeration load amount prediction means 161 determine the concentration of an organic substance in inflow sewage from the predicted inflow amount as an aeration load amount. An aeration air flow rate computing means 162 determine an aeration air flow rate for achieving the target dissolved oxygen concentration of the water to be treated from the predicted aeration load amount and the dissolved oxygen concentration of the water to be treated to control the aeration air flow rate. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
