Methods for cleaning-in-place
AssigneeRegenesis Bioremediation Products
InventorsKristen A. Thoreson, Paul R. Erickson, Scott B. Wilson
Life of this patent
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Abstract
Methods of cleaning-in-place are contemplated whereby a suspension is introduced into a mechanical system containing contaminated surfaces. The solid-phase particles suspended within the suspension are functional to at least partially clean the contamination. Following the at least partial cleaning, the suspension may be purged from the mechanical system. In this way, it may be seen that modalities of decontamination may be achieved which may be operative to decontaminate many types and degrees of contamination.
Claims20
A method of cleaning a contaminated surface comprising per- and polyfluoroalkyl substances (PFAS) within an aboveground fire suppression system, the method comprising the steps of:
- introducing a suspension into the aboveground fire suppression system having at least one contaminated surface comprising the PFAS such that the suspension comes into contact with the at least one contaminated surface, the suspension comprising a plurality of solid-phase particles;
- maintaining the suspension in contact with the at least one contaminated surface for a sufficient length of time to at least partially decontaminate the at least one contaminated surface via adsorption of at least some of the PFAS by the plurality of solid-phase particles, the suspension being allowed to remain in the aboveground fire suppression system with zero flow during said maintaining step;
- and
- purging the suspension from the aboveground fire suppression system;
- wherein the method results in a reduction of PFAS concentration in the aboveground fire suppression system to meet a regulatory standard.
A method of cleaning a contaminated surface comprising per- and polyfluoroalkyl substances (PFAS) within an aboveground fire suppression system, the method comprising the steps of:
- choosing a solid-phase particle to specifically decontaminate the PFAS of at least one contaminated surface of the fire suppression system contaminated surface by adsorption;
- providing a suspension comprising a plurality of the solid-phase particles;
- introducing the suspension into the aboveground fire suppression system having the at least one contaminated surface such that the suspension comes into contact with the at least one contaminated surface;
- maintaining the suspension in contact with the at least one contaminated surface for a sufficient length of time to at least partially decontaminate the at least one contaminated surface via adsorption of at least some of the PFAS by the plurality of the solid-phase particles;
- and
- purging the suspension from the aboveground fire suppression system;
- wherein the method results in a reduction of PFAS concentration in the aboveground fire suppression system to meet a regulatory standard.
Dependencies are inferred from the claim text.