# US 9,751,782 B2 · Wastewater treatment system and method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,751,782 B2 - Document ID: US9751782B2 - Status: Granted - Kind: B2 - Application number: 13/830,753 - Filed: 2013-03-14 - Published: 2014-09-18 - Granted: 2017-09-05 - Earliest claimed: 2013-03-14 - Assignees: DuBois Chemicals, Inc. - Applicants: DuBois Chemicals, Inc. - Inventors: Brent K. McCurdy - Web page: https://patentgrep.com/patent/US9751782B2 ## CPC - C02F 1/5281: {Installations for water purification using chemical agents} - C02F 1/5209: {Regulation methods for flocculation or precipitation} - C02F 1/5245: {using basic salts, e.g. of aluminium and iron} - C02F 1/5272: {using specific organic precipitants} - C02F 1/56: Macromolecular compounds - C02F 1/722: {Oxidation by peroxides} - C02F 2103/44: from vehicle washing facilities - C02F 2209/42: Liquid level - C02F 2303/02: Odour removal or prevention of malodour - 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) ## Abstract The present invention relates to systems and methods of wastewater treatment that rely primarily on the use of water treatment chemicals to clean wastewater without the need to use filtration mechanisms. The present invention generally provides a system that is less complex and less expensive to operate than wastewater treatment systems in the prior art. ## Claims ### Claim 1 A system for treating wastewater, comprising: a first tank; a discharge assembly fluidly connected to said first tank, said discharge assembly comprising at least one turbidimeter; a valve assembly fluidly connected to said first tank and downstream of said discharge assembly, the valve assembly comprising a first valve and a second valve; a first controller electrically connected to the turbidimeter and the first valve for opening and closing the first valve based on a received signal from the turbidimeter; a second controller electrically connected to the turbidimeter and the second valve for opening and closing the second valve based on a received signal from the turbidimeter; a second tank; a plurality of conduits fluidly connecting the second valve of said valve assembly to said second tank and the first valve of said valve assembly to a waste reservoir; at least one treatment chemical source; and a wastewater source; wherein when wastewater is added from said wastewater source to said first tank, at least one treatment chemical is added from said at least one treatment chemical source to said wastewater; wherein when the turbidimeter senses a desired minimum clarity of the wastewater, the first controller receives a signal to close the first valve and the second controller receives a signal to open the second valve such that the wastewater flows from the first tank to the second tank; and wherein when the turbidimeter does not sense a desired minimum clarity of the wastewater, the first controller receives a signal to open the first valve and the second controller receives a signal to close the second valve such that the wastewater flows from the first tank to the waste reservoir. ### Claim 2 (depends on 1) The system of claim 1, wherein said first tank further comprises a skimmer. ### Claim 3 (depends on 1) The system of claim 1, wherein said second tank further comprises a skimmer. ### Claim 4 (depends on 1) The system of claim 1, wherein said first tank further comprises at least one float sensor for measuring the water level in said first tank. ### Claim 5 (depends on 1) The system of claim 1, wherein said second tank further comprises at least one float sensor for measuring the water level in said second tank. ### Claim 6 (depends on 1) The system of claim 1, wherein said second tank further comprises a turbidimeter. ### Claim 7 (depends on 1) The system of claim 1, wherein said treatment chemical is a coagulant. ### Claim 8 (depends on 1) The system of claim 1, wherein said treatment chemical is a flocculant. ### Claim 9 (depends on 1) The system of claim 1, wherein the at least one treatment chemical is added using a dosing pump. ### Claim 10 (depends on 1) The system of claim 1, further comprising a third controller for adjusting an addition rate of said at least one treatment chemical. ### Claim 11 (depends on 1) The system of claim 1, wherein the first tank is filterless. ### Claim 12 (depends on 1) The system of claim 1, wherein the bottom portion of the first tank is conical shaped. ### Claim 13 A system for treating wastewater, comprising: a first tank; a discharge assembly fluidly connected to the first tank, the discharge assembly comprising a turbidimeter; a valve assembly fluidly connected to the first tank and downstream of the discharge assembly, the valve assembly comprising a first valve and a second valve; at least one controller electrically connected to the turbidimeter and the first and second valves for opening and closing the first and second valves based on a received signal from the turbidimeter; a second tank; a plurality of conduits fluidly connecting the second valve of the valve assembly to the second tank and the first valve of the valve assembly to a waste reservoir; at least one treatment chemical source; and a wastewater source; wherein when wastewater is added to the first tank from the wastewater source, at least one treatment chemical is added from the at least one treatment chemical source to the wastewater in the first tank; wherein when the turbidimeter senses a desired minimum clarity of the wastewater, the at least one controller receives a signal to close the first valve and open the second valve such that the wastewater flows from the first tank to the second tank; and wherein when the turbidimeter does not sense a desired minimum clarity of the wastewater, the at least one controller receives a signal to open the first valve and close the second valve such that the wastewater flows from the first tank to the waste reservoir. ### Claim 14 (depends on 13) The system of claim 13, wherein the first tank is filterless. ### Claim 15 (depends on 13) The system of claim 13, wherein the bottom portion of the first tank is conical shaped. ### Claim 16 (depends on 13) The system of claim 13, wherein the first tank further comprises a skimmer. ### Claim 17 (depends on 13) The system of claim 13, wherein the first tank further comprises at least one float sensor for measuring the water level in the first tank. ### Claim 18 (depends on 13) The system of claim 13, wherein the at least one treatment chemical is added using a dosing pump. ### Claim 19 (depends on 13) The system of claim 13, wherein the treatment chemical is a coagulant. ### Claim 20 (depends on 13) The system of claim 13, wherein the treatment chemical is a flocculant.