Abstract: A treating apparatus is shown for removing cloggants from the pores and surfaces of aeration diffuser elements used in an activated sludge treatment process or the like. The apparatus pumps a liquid acid solution through the aeration piping network of the system and out through the diffusers for reacting the acid with the cloggants in the pores of the diffusers. After the cleaning action has been completed, the apparatus produces an agitation throughout the diffuser system being cleansed as the liquid acid is being pumped out of the system and the air flow is being reestablished.

Abstract: A clamp structure is shown for holding a ceramic aeration dome firmly seated on its molded polyvinyl saddle mounting means disposed at the bottom of an aeration tank filled with a liquid to be aerated.

Abstract: A treating process is shown for removing cloggants from the pores and surfaces of aeration diffuser elements used in an activated sludge treatment process or the like. In this process, an acid solution is made to fill the aeration piping network, is fed through the plenum chambers that support the respective elements to be treated, and into the pores in said elements for reacting with the cloggants to be removed. The process is performed so that the acid solution fills the pores and contacts the surfaces of the diffusers and the plenums and the submerged piping network. The acid solution is reacted with the cloggants and is then agitated in contact with the diffusers and with the cloggants in the pores and on the surfaces of the diffusers to rejuvenate these elements.