| 摘要 |
A method of cleaning an air diffuser apparatus component in a membrane filtration unit in which the air diffuser apparatus includes an air main pipe connected to at least one aeration blower, liquid supply piping that joins in midstream of the air main pipe, a branch conduit horizontally connected through a gas supply pipe branched from the air main pipe, and a plurality of air diffusion pipes horizontally disposed perpendicular to the branch pipe conduit, each of the plurality of diffusion pipes having a plurality of diffusion holes that open substantially vertically downward, involves setting a gas flow rate in the branch pipe conduit in a range of 1 m/sec or more and 8 m/sec or less, and a liquid supply rate in the branch pipe conduit in a range of 0.03 L/min/mm2 or more and 0.2 L/min/mm2 or less, whereby solid sludge that may adhere and clog diffusion holes of the air diffusion pipe during the filtering process is efficiently removed by a gas-liquid mixing fluid. The air diffusion pipe can be cleaned at any time without stopping a drainage treatment. |
