Method for Drying Spent Filter Media
AssigneeGrain Processing Corporation
InventorSarjit Johal
Life of this patent
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Abstract
Disclosed is a process of stabilizing spent filter material that comprises mixing the filter media with a dry media to produce a composition having a moisture content that is sufficiently low to retard microbial growth. The composition comprises spent filter media and a dry material, and preferably comprises diatomaceous earth. Soil is treated by adding the composition as a top dressing, soil amendment, or the like.
Claims12
1-20. (canceled)
A composition comprising 40 to 70 wt % spent filter media based on dry solids weight, a mineral material, and at least one nitrogenous material, wherein the spent filter media comprises spent diatomaceous earth containing nutrients retained from a filtration stream, and wherein the composition comprises at most 18 wt % water.
A composition comprising 40 to 70 wt % spent filter media based on dry solids weight, a mineral material, and urea, wherein the spent filter media comprises spent diatomaceous earth containing nutrients retained from a filtration stream and contains about 30 to 95 wt % diatomaceous earth, about 10 to 50 wt % organic carbon, and about 1 to 25 wt % activated carbon based on the weight of the spent filter media, and wherein the composition comprises at most 18 wt % water, and wherein the composition contains an additional material comprising at least one or more of a binder, a surfactant, a mineral, a nutrient, a fibrous plant material, or mixtures thereof.
Dependencies are inferred from the claim text.