Liquid purification or separation – Processes – Chemical treatment
Patent
1990-07-09
1991-09-24
Wyse, Tom
Liquid purification or separation
Processes
Chemical treatment
210754, 134 3, 134 2212, 134 39, 261122, C02F 320
Patent
active
050511939
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.
REFERENCES:
patent: Re33177 (1990-03-01), Schmit et al.
patent: 2684330 (1954-07-01), French
patent: 2686138 (1954-08-01), Klein
patent: 2826209 (1958-03-01), Klein
patent: 3150007 (1964-09-01), Kovachy
patent: 4238244 (1980-12-01), Banks
patent: 4382867 (1983-05-01), Schmit et al.
patent: 4402758 (1983-09-01), Hobbs
patent: 4419141 (1983-12-01), Kunkel
Manual of Practice No. 5, "Air Diffusion in Sewage Works", Federation of Sewage & Industrial Wastes Assn.; pp. 48-62 (1952).
Aeration Engineering Resources Corporation
Wyse Tom
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