Compositions and methods for cleaning water filtration media

摘要

Compositions and methods for removing surface deposits in situ from filtration media contained in water filtration beds may include a solid acid component, a solid oxidizer, low temperature activator, a dessicant, an anti-caking agent, a pH indicator, a corrosion inhibitor, a surfactant, a chelating agent, and/or a defoaming agent. A granular acid component may include sodium bisulfate, and a granular oxidizing component may include at least one of sodium percarbonate, sodium perborate, potassium percarbonate, and potassium perborate. Compositions may be applied to top surface and/or subsurface regions of a filter bed, in wetted or dry form. A kit includes a container with dry composition and instructions or indicia for cleaning water filtration media using the composition.

主权项

1. A dry composition for use in removing surface contaminants from filtration media contained in a water filter media bed, the dry composition comprising:
a granular acid component comprising sodium bisulfate; and a granular oxidizing component comprising at least one of sodium percarbonate, sodium perborate, potassium percarbonate, or potassium perborate; wherein the dry composition comprises at least one of the following features (i) or (ii): (i) a pH indicator component arranged to exhibit at least one change in color responsive to change in pH within an acidic pH range; or (ii) the dry composition comprises at least 80 wt % sodium bisulfate and at least 5 wt % of at least one of sodium percarbonate, potassium percarbonate, potassium perborate, or sodium perborate.