# US 2018/0021722 A1 · Rotating Spray Device for Water Distribution on Media Bed of a Biofilter > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0021722 A1 - Document ID: US20180021722A1 - Status: Published application - Kind: A1 - Application number: 15/550,175 - Filed: 2016-02-12 - Published: 2018-01-25 - Earliest claimed: 2015-02-20 - Assignees: Evoqua Water Technologies LLC - Applicants: Evoqua Water Technologies LLC - Inventors: Michael Sumner Murphy; James Paul Harshman; Eric Carl Hansen - Web page: https://patentgrep.com/patent/US20180021722A1 ## CPC - B01D 53/346: {Controlling the process} - B01D 53/84: Biological processes - C02F 3/006: {Regulation methods for biological treatment} - C02F 3/043: {Devices for distributing water over trickle filters} - B01D 2252/103: Water - B01D 2257/304: Hydrogen sulfide - C02F 3/107: {Inorganic materials, e.g. sand, silicates} - C02F 2101/101: {Sulfur compounds} - C02F 2209/001: Upstream control, i.e. monitoring for predictive control - C02F 2209/003: Downstream control, i.e. outlet monitoring, e.g. to check the treating agents, such as halogens or ozone, leaving the process - C02F 2209/06: pH - C02F 2209/15: N03-N - C02F 2209/265: in the gas phase - C02F 2209/40: Liquid flow rate - C02F 2209/44: Time - C02F 2303/02: Odour removal or prevention of malodour - Y02A 50/20: Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters - Y02W 10/10: Biological treatment of water, waste water, or sewage - 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) - C02F: TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE (separation in general B01D; special arrangements on waterborne vessels of installations for treating water, waste water or sewage, e.g. for producing fresh water, B63J; adding materials to water to prevent corrosion C23F; treating radioactively-contaminated liquids G21F9/04; regeneration of reactants for recirculation into processes, see the relevant places for the processes) - Y02A: TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE - Y02W: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT ## Abstract A biofilter irrigation system comprises a cylindrical vessel having a central axis, a media bed positioned within the vessel, a spray head system positioned above the media bed, the spray head system comprising a central hub positioned at the central axis of the vessel, at least one arm extending distally from the central hub toward a wall of the vessel and configured to rotate about the central axis, and a plurality of nozzles connected to the at least one arm. The biofilter irrigation system further comprises a fluid outlet positioned below the media bed. ## Claims ### Claim 1 A biofilter irrigation system, comprising: a cylindrical vessel having a central axis; a media bed positioned within the vessel; a spray head system positioned above the media bed, comprising: a central hub positioned at the central axis of the vessel; at least one arm extending distally from the central hub toward a wall of the vessel and configured to rotate about the central axis; and a plurality of nozzles connected to the at least one arm; and a fluid outlet positioned below the media bed. ### Claim 2 (depends on 1) The biofilter irrigation system of claim 1, wherein the vessel further comprises a contaminated gas inlet positioned below the media bed. ### Claim 3 (depends on 2) The biofilter irrigation system of claim 2, configured to remove at least about 90% of contaminants introduced to the biofilter. ### Claim 4 (depends on 1) The biofilter irrigation system of claim 1, wherein the media bed comprises foamed glass media. ### Claim 5 (depends on 1) The biofilter irrigation system of claim 1, wherein a source of bio-nutrients is fluidly connectable to the spray head system. ### Claim 6 (depends on 1) The biofilter irrigation system of claim 1, wherein a source of water is fluidly connectable to the spray head system. ### Claim 7 (depends on 6) The biofilter irrigation system of claim 6, wherein two arms extend distally in opposite directions from the central hub toward a wall of the vessel. ### Claim 8 (depends on 6) The biofilter irrigation system of claim 6, wherein four arms extend distally from the central hub toward a wall of the vessel and are spaced 90° apart. ### Claim 9 (depends on 1) The biofilter irrigation system of claim 1, wherein a plurality of nozzles is connected to each of a plurality of arms. ### Claim 10 (depends on 9) The biofilter irrigation system of claim 9, wherein each nozzle is spaced along each arm at varying lengths from the central hub. ### Claim 11 (depends on 1) The biofilter irrigation system of claim 1, wherein the spray angles of the plurality of nozzles are each adjustable. ### Claim 12 (depends on 11) The biofilter irrigation system of claim 11, wherein the flow rates of the nozzles are adjustable. ### Claim 13 (depends on 12) The biofilter irrigation system of claim 12, wherein the flow rate of each nozzle is different. ### Claim 14 (depends on 1) The biofilter irrigation system of claim 1, wherein the flow rates of the nozzles vary. ### Claim 15 (depends on 14) The biofilter irrigation system of claim 14, wherein the flow rates of the nozzles increase with spacing from the central hub. ### Claim 16 (depends on 1) The biofilter irrigation system of claim 1, further comprising a control system. ### Claim 17 (depends on 16) The biofilter irrigation system of claim 16, wherein the control system comprises at least one sensor positioned in the fluid outlet. ### Claim 18 (depends on 17) The biofilter irrigation system of claim 17, wherein the at least one sensor provides an input signal to a controller, which provides an output signal to a source of water. ### Claim 19 (depends on 18) The biofilter irrigation system of claim 18, wherein the controller is further connected to a timer. ### Claim 20 (depends on 17) The biofilter irrigation system of claim 17, wherein the sensor is configured to identify at least one of pH, nutrient concentration, and hydrogen sulfide concentration. ### Claim 21 (depends on 1) The biofilter irrigation system of claim 1, wherein the cylindrical vessel comprises a plurality of media beds. ### Claim 22 (depends on 21) The biofilter irrigation system of claim 21, wherein the cylindrical vessel comprises a spray head system positioned above each of the plurality of media beds. ### Claim at position 23 23-45. (canceled)