# US 10,479,735 B2 · Process to produce a commercial soil additive prepared from compost and in situ oxidized sulphur and soil additive so formed

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- Number: US 10,479,735 B2
- Document ID: US10479735B2
- Status: Granted
- Kind: B2
- Application number: 15/504,829
- Filed: 2015-08-19
- Published: 2017-08-24
- Granted: 2019-11-19
- Earliest claimed: 2014-08-19
- Assignees: Gfl Environmental Inc.
- Applicants: Bio-Can Ltd.
- Inventors: Charles O'Donnell; Neil Wiens; Jeffrey Thompson
- Web page: https://patentgrep.com/patent/US10479735B2

## CPC

- C05D 9/00: Other inorganic fertilisers
- C05B 17/00: Other phosphatic fertilisers, e.g. soft rock phosphates, bone meal
- C05D 9/02: containing trace elements
- C05F 11/00: Other organic fertilisers
- C05F 17/00: Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
- C05F 17/20: using specific microorganisms or substances, e.g. enzymes, for activating or stimulating the treatment (use of invertebrates C05F17/05)
- C05F 17/60: Heating or cooling during the treatment
- C05F 17/90: Apparatus therefor
- C05F 17/964: Constructional parts, e.g. floors, covers or doors
- C05F 17/979: the other material being gaseous
- C05F 11/02: from peat, brown coal, and similar vegetable deposits
- Y02P 20/145: the feedstock being materials of biological origin
- Y02W 30/40: Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse
- C05D: INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
- C05B: PHOSPHATIC FERTILISERS
- C05F: ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02W: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT

## Abstract

A process for producing a commercial soil additive comprises mixing a compost composition with elementary (raw) sulphur to form a mixed material and turning the mixed material until it is substantially homogenous and until there is microbial oxidation of elementary sulphur therein to at least one sulphate.

## Claims

### Claim 1

A process for producing a commercial soil additive comprising:
a) mixing a first compost composition with a source of elemental sulphur to form a mixed material, wherein the source of elemental sulphur comprises 90-99% elemental sulphur, said mixed material comprises 80-85% elemental sulphur;
b) forming at least one of a static or dynamic pile comprising the mixed material, thereby forming at least one first pile;
c) adding a second compost composition on top of the at least one first pile to form at least one second pile, wherein the second compost composition is 10-15% of the first compost composition; and
d) turning the at least one second pile until the mixed material is substantially homogenous and until there is microbial oxidation of the elemental sulphur therein to at least one sulphate to form the soil additive.

### Claim 2 (depends on 1)

A soil additive produced by the process of claim 1 wherein the soil additive is about 70% by weight sulphur and about 30% by weight compost.

### Claim 3 (depends on 1)

The soil additive produced by the process of claim 1 wherein the soil additive has a moisture content of 25-30%.

### Claim 4 (depends on 2)

The soil additive of claim 2 wherein the soil additive has a pH of 5-5.5.

### Claim 5 (depends on 1)

The soil additive produced by the process of claim 1 wherein the sulphur in the soil additive has a sulphate level of about 5%.

### Claim 6 (depends on 1)

The soil additive produced by the process of claim 1 wherein the soil additive further comprises additional nutrients selected from the group consisting of NPK, carbon, humic acid, and any combination thereof.