Process and system for back-and-forth washing of adsorptive media
AssigneeOzono Polaris, S.A. de C.V.
InventorDavid Ross MACKAY PETT
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Abstract
The invention provides methods and systems for washing adsorptive media with minimal water consumption. More specifically, the invention provides methods and systems for in situ regeneration and/or sanitization of adsorptive media, such as activated carbon, using back-and-forth washing.
Claims23
A method for washing an adsorptive medium within a water treatment system, comprising the steps of:
- (a) providing a first and a second vessel, wherein said first vessel is configured to contain the adsorptive medium to be regenerated, and wherein the second vessel is in fluid communication with the first vessel;
- and
- (b) performing a washing stage with a wash fluid by cycling a flow of the wash fluid between the first and second vessel in a first and second flow direction to produce a back-and-forth flow of the wash fluid through the adsorptive medium, wherein the back-and-forth flow of the wash fluid between the first and second vessel is performed for a sufficient number of cycles and a time period sufficient to at least partially regenerate the adsorptive medium, thereby producing a processed wash fluid;
- and
- (c) stopping the back-and-forth flow of the processed wash fluid between the first and second vessel;
- and
- (d) performing a step selected from the group comprising draining the processed wash fluid from the first vessel, draining the processed wash fluid from the second vessel, flushing the first vessel, flushing the second vessel, discharging the processed wash fluid to waste, neutralizing the processed wash fluid, treating the processed wash fluid to generate at least one additional wash fluid for reuse, rinsing the adsorptive medium, returning to filtration flow, and combinations thereof.
A water treatment system comprising a first and a second vessel, wherein said first vessel is configured to contain an adsorptive medium to be regenerated, and wherein the second vessel is in fluid communication with the first vessel;
- and wherein the system is configured to perform a washing stage with a wash fluid by cycling a flow of the wash fluid between the first and second vessel in a first and second flow direction to produce a back-and-forth flow of the wash fluid through the adsorptive medium, and is further configured to provide for the back-and-forth flow of the wash fluid between the first and second vessel to continue for a sufficient number of cycles and a time period sufficient to at least partially regenerate the adsorptive medium, and further comprising at least one of control means to reverse the flow between the first and second vessels, a heater, an external holding tank, a chemical feed, an ozone contact tank, a wash pump, and combinations thereof.
Dependencies are inferred from the claim text.