# US 2017/0233304 A1 · Method for Drying Spent Filter Media

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- Number: US 2017/0233304 A1
- Document ID: US20170233304A1
- Status: Published application
- Kind: A1
- Application number: 15/583,532
- Filed: 2017-05-01
- Published: 2017-08-17
- Earliest claimed: 2005-05-16
- Assignees: Grain Processing Corporation
- Applicants: Grain Processing Corporation
- Inventors: Sarjit Johal
- Web page: https://patentgrep.com/patent/US20170233304A1

## CPC

- F26B 1/00: Preliminary treatment of solid materials or objects to facilitate drying {, e.g. mixing or backmixing the materials to be dried with predominantly dry solids (F26B5/005 takes precedence)}
- A01N 59/06: Aluminium; Calcium; Magnesium; Compounds thereof
- C05B 17/00: Other phosphatic fertilisers, e.g. soft rock phosphates, bone meal
- C05C 9/00: Fertilisers containing urea or urea compounds
- C05C 11/00: Other nitrogenous fertilisers
- C05D 3/02: from limestone, calcium carbonate, calcium hydrate, slaked lime, calcium oxide, waste calcium products
- C05G 3/50: Surfactants; Emulsifiers
- C05G 3/60: Biocides or preservatives, e.g. disinfectants, pesticides or herbicides; Pest repellants or attractants
- C05G 3/80: Soil conditioners
- C05G 5/12: Granules or flakes
- F26B 5/16: by contact with sorbent bodies, e.g. absorbent mould; by admixture with sorbent materials
- Y02A 40/20: Fertilizers of biological origin, e.g. guano or fertilizers made from animal corpses
- F26B: DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM (drying devices for combines A01D41/133; racks for drying fruit or vegetables A01F25/12; drying foodstuffs A23; drying hair A45D20/00; body-drying implements A47K10/00; drying household articles A47L; drying gases or vapours B01D; chemical or physical processes for dewatering or like separating liquids from solids B01D43/00; centrifugal apparatus B04; drying ceramics C04B33/30; drying yarns or fabrics in association with some other form of treatment D06C; drying frames for laundry without heating or positive air circulation, domestic laundry-or spin-driers, wringing or hot pressing laundry D06F; furnaces, kilns, ovens F27)
- A01N: PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF (preservation of food or foodstuff A23); BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES (preparations for medical, dental or toiletry purposes which kill or prevent the growth or proliferation of unwanted organisms A61K); PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- C05B: PHOSPHATIC FERTILISERS
- C05C: NITROGENOUS FERTILISERS
- C05D: INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
- C05G: MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS (organic fertilisers containing added bacterial cultures, mycelia, or the like C05F11/08; organic fertilisers containing plant vitamins or hormones C05F11/10); FERTILISERS CHARACTERISED BY THEIR FORM
- Y02A: TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE

## 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.

## Claims

### Claim at position 1

1-20. (canceled)

### Claim 21

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.

### Claim 22 (depends on 21)

The composition of claim 21, the nitrogenous material comprising urea.

### Claim 23 (depends on 21)

The composition of claim 21, wherein the spent filter media 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.

### Claim 24 (depends on 21)

The composition of claim 21, 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.

### Claim 25 (depends on 24)

The composition of claim 24, the additional material comprising a nutrient.

### Claim 26 (depends on 25)

The composition of claim 25, the nutrient comprising phosphate.

### Claim 27 (depends on 24)

The composition of claim 24, the additional material comprising a fibrous plant material.

### Claim 28 (depends on 27)

The composition of claim 27, the fibrous plant material comprising alfalfa.

### Claim 29 (depends on 25)

The composition of claim 25, the additional material comprising a surfactant.

### Claim 30

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.

### Claim 31 (depends on 21)

A method comprising adding the composition of claim 21 to soil.