# US 5,350,435 A · Soil fertilization method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,350,435 A - Document ID: US5350435A - Status: Granted - Kind: A - Application number: 08/026,560 - Filed: 1993-03-04 - Granted: 1994-09-27 - Earliest claimed: 1993-03-04 - Assignees: Planet Protection Systems, Inc. - Inventors: Gene L. Kamin - Web page: https://patentgrep.com/patent/US5350435A ## CPC - C05B 7/00: Fertilisers based essentially on alkali or ammonium orthophosphates (C05B11/00 takes precedence) - B01D 53/58: Ammonia - C05F 11/00: Other organic fertilisers - Y02A 50/20: Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters - Y10S 71/903: Soil conditioner - Y10S 71/904: Carrier - C05B: PHOSPHATIC FERTILISERS - B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28) - C05F: ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE - Y02A: TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE - Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS ## Abstract The present invention provides a soil fertilization method which includes a process for producing a fertilyzer by-product from an ammonia filtering media. The method includes the steps of providing a filter media containing phosphoric acid soaked particles. In addition, the method includes providing ammonia laden air. The ammonia laden air is passed through the filter media to remove ammonia from the air which is removed by a chemical reaction which converts the phosphoric acid soaked wood particles to ammonium phosphate coated wood particles. After substantially all of the wood particles are converted to ammonium phosphate wood particles, the filter media is collected and then applied to soil to fertilize and build the soil. ## Claims ### Claim 1 A soil fertilization method comprising the steps of: providing a source of ammonia-laden air; providing fresh filter media containing phosphoric acid soaked wood particles; passing the ammonia-laden gas through the fresh filter media to remove ammonia from the vapor and to convert the phosphoric acid soaked wood particles to ammonium phosphate coated wood particles; collecting the filter media containing ammonium phosphate coated wood particles now referred to as spent filter media; and applying the spent filter media to soil to fertilize the soil. ### Claim 2 (depends on 1) A method as claimed in claim 1 further comprising a step of providing a container for containing the filter media wherein the container has an inlet for receiving ammonia-laden vapor and an outlet for discharging ammonia-less vapor, the container also having access means for gaining access to the interior of the container to enable spent filter media to be removed from the container and to enable the container to be refilled with fresh filter media. ### Claim 3 (depends on 2) A method as claimed in claim 2 wherein the access means includes a lid removably attached to one end of the container. ### Claim 4 (depends on 4) A method as claimed in claim 4 wherein the phosphoric acid soaked wood particles includes wood chips. ### Claim 5 (depends on 4) A method as claimed in claim 4 wherein the wood chips have a particle size ranging between about 1/16" and 3/16" so that the said wood chips pass through screen having a mesh size of about 1/4". ### Claim 6 (depends on 4) A method as claimed in claim 4 wherein said wood chips comprise about 50 wt % 1/8" wood chips, 20 wt % 1/16" wood chips, and 30 wt % 3/16" wood chips. ### Claim 7 (depends on 2) A method as claimed in claim 2 wherein the container is cylindrically shaped with the-inlet located on one end of the container and the outlet located on the other end of the container. ### Claim 8 (depends on 2) A method as claimed in claim 2 wherein at least one of the inlets and outlets is covered with a sheet of glass fibrous material for spreading the incoming ammonia-laden vapor across a lateral surface of the filter media contained within the filter container. ### Claim 9 (depends on 1) A method as claimed in claim 1 wherein the ammonia-laden vapor is produced by a diazo type copier. ### Claim 10 (depends on 1) A method as claimed in claim 1 wherein the filter media is contained within a cylindrically shaped plastic container having an integral bottom located at one end of the container and a removable lid located at the other end of the container, the integral bottom of the container and the removable lid being provided with a plurality of apertures for receiving ammonia-laden vapor and for passing ammonia-less vapor, the container also being provided with a pair of fibrous glass discs, one of which is located against the inner surface of the integral bottom of the container and the other of which is located against the inner surface of the removable lid of the container, said fibrous glass discs serving to pass ammonia-laden vapor and ammonia-free vapor, and to retain the filter media within the container so theft it is incapable of passing through the apertures of the container's integral bottom and removable lid.