| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a pressure drop measuring method of an air diffuser by which pressure change of the air diffuser can be measured with sufficient accuracy by eliminating influence of air diffusion water depth and air diffuser pressure drop from a measured value. <P>SOLUTION: An air supply piping line L1, which is joined to the air diffuser 2 provided in a treating tank for biologically treating organic sewage, and an air blow piping line L2, which directly discharges air from an opening at a low end directly into water, are provided side by side. By measuring pressure difference between both lines L1, L2, pressure drop of the air diffuser 2 can be measured. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
