The invention relates to the technical field of
aeration, in particular to a liftable microporous aerator which comprises a lifting plate, an air conveying unit is fixedly connected to the bottom of the lifting plate, a plurality of
aeration units are fixedly connected to the end, away from the lifting plate, of the air conveying unit, and the air conveying unit is used for conveying air into the
aeration units; extension plates are fixedly connected to the two sides, close to the gas conveying unit, of the lifting plate, and sliding grooves are formed in the bottoms of the extension plates; due to the fact that the microporous aerators are arranged downwards in the fan shape, when the microporous aerators aerate
sewage, water at the bottoms of the aeration units is also aerated, air can simultaneously push surrounding
sewage when flowing out of the aeration holes, the
sewage fluctuates,
activated sludge can be driven to flow when the sewage fluctuates, and the
activated sludge can flow out of the aeration units. According to the device,
activated sludge can be prevented from sinking to the bottom, meanwhile, when the microporous aerators make contact with the activated
sludge and are blocked, the air pressure of the microporous aerators which are not blocked can be increased, and therefore the activated
sludge sinking to the bottom can be cleared away more quickly.