[특허]System and method for the treatment of wastewater

System and method for the treatment of wastewater 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B01D-021/00 C02F-001/52 B01D-021/24 B01D-024/38 B01D-061/00 B01D-029/88 C02F-009/00 B01D-029/50 C02F-001/56 B03D-003/06 B01D-021/01 C02F-001/68 C02F-001/66 C02F-001/00 B01D-037/00 B01D-035/00 B01D-035/28 B01D-024/00 B01D-029/00 C02F-001/44
출원번호	US-0470894 (2012-05-14)
등록번호	US-9682876 (2017-06-20)
발명자 / 주소	Smiddy, Frank Leslie
출원인 / 주소	ProAct Services Corporation
대리인 / 주소	Belles Katz LLC
인용정보	피인용 횟수 : 0 인용 특허 : 82

초록 ▼

A system and method for the treatment of wastewater. In one aspect, the invention can be a method of treating wastewater comprising: a) introducing wastewater having a first turbidity level into a wastewater treatment system; b) injecting an aqueous polymer mixture into the wastewater to flocculate suspended solids within the wastewater; c) removing the flocculated suspended solids from the wastewater to form a treated water having a second turbidity, the second turbidity being lower than the first turbidity; and wherein the aqueous polymer mixture of step b) is formed by introducing a raw polymer into a re-circulated portion of the treated water.

대표청구항 ▼

1. A method of treating wastewater comprising: a) introducing wastewater having a first turbidity level into a treatment line of a wastewater treatment system, the wastewater treatment system comprising a mixing tank receiving the wastewater introduced into the treatment line, a transfer pump operably coupled to the treatment line downstream of the mixing tank, a first injector operatively coupled to the treatment line, a second injector operatively coupled to the treatment line, a third injector operatively coupled to the treatment line, a mixing apparatus operably coupled inline with the treatment line downstream of the transfer pump, a separator operably coupled to the treatment line downstream of the mixing apparatus, and a recirculation line operably coupled to the treatment line downstream of the separator;b) injecting a first aqueous polymer mixture through the first injector into the wastewater flowing into the mixing tank to flocculate suspended solids within the wastewater, wherein the wastewater and flocculated suspended solids flowing into the mixing tank flow to the transfer pump;c) selectively injecting a second aqueous polymer mixture through one of the second injector or the third injector into the wastewater and flocculated suspended solids pumped by the transfer pump from the mixing tank to the mixing apparatus to further flocculate suspended solids within the wastewater, the second injector being downstream of the mixing tank and upstream of the transfer pump and the third injector being downstream of the transfer pump and upstream of the mixing apparatus;d) removing the flocculated suspended solids from the wastewater with the separator to form a treated water having a second turbidity level, the second turbidity level being lower than the first turbidity level;e) recirculating a portion of the treated water through the recirculation line to form a re-circulated portion of the treated water and discharging a remainder of the treated water to a desired location;f) introducing a first raw polymer into a first portion of the re-circulated portion of the treated water to form the first aqueous polymer mixture injected in step b); andg) introducing a second raw polymer into a second portion of the re-circulated portion of the treated water to form the second aqueous polymer mixture injected in step c). 2. The method of claim 1 further comprising: measuring the first turbidity level of the wastewater prior to step b); andwherein a flow rate of the first and second aqueous polymer mixtures injected into the wastewater in steps b) and c) is automatically adjusted based on the measured first turbidity level and a flow rate of the wastewater being introduced in step a). 3. The method of claim 1 further comprising: measuring a pH level of the wastewater prior to step b); andinjecting a pH adjustment chemical into the wastewater, wherein a flow rate of the pH adjustment chemical injected into the wastewater is adjusted based on the measured pH level and a flow rate of the wastewater being introduced in step a). 4. The method of claim 1 wherein the separator comprises a permeable membrane, and wherein step d) further comprises removing the flocculated suspended solids from the wastewater by forcing the wastewater through each of the permeable membrane of the separator, a sand filter system and a bag filter system. 5. The method of claim 1 wherein steps b) and c) are performed simultaneously. 6. The method of claim 1 wherein the first aqueous polymer mixture injected in step b) is drawn from a batch of the first aqueous polymer mixture stored in a first polymer tank, the batch having a maximum volume; wherein the first aqueous polymer mixture has a usable life cycle; andwherein the maximum volume is selected so that at least a single turnover of the batch is achieved during the usable life cycle of the first aqueous polymer mixture. 7. The method of claim 1 further comprising: f-1) storing a batch of the first aqueous polymer mixture that is formed by introducing the first raw polymer into the first portion of the re-circulated portion of the treated water in a first polymer tank, wherein the first aqueous polymer mixture injected in step b) is drawn from the batch of the first aqueous polymer mixture in the first polymer tank;f-2) monitoring a liquid level of the batch of the first aqueous polymer mixture in the first polymer tank; andf-3) upon the liquid level of the batch of the first aqueous polymer mixture in the first polymer tank falling below a predetermined lower threshold, forming an additional amount of the first aqueous polymer mixture and adding the additional amount of the first aqueous polymer mixture to the batch until the liquid level of the batch reaches a predetermined upper threshold; andwherein the additional amount of the first aqueous polymer mixture is formed by introducing the first raw polymer into the first portion of the re-circulated portion of the treated water and flowing the first raw polymer and the first portion of the re-circulated portion of the treated water into a mixer prior to entering the first polymer tank, thereby mixing the first raw polymer and the first portion of the re-circulated portion of the treated water. 8. The method of claim 1 wherein the first raw polymer is different than the second raw polymer. 9. The method of claim 1 wherein the first and second aqueous polymer mixtures are injected into the wastewater simultaneously. 10. The method of claim 1 further comprising flowing the treated water through at least one of a sand filter system and a bag filter system after step d) and before step e). 11. A system for treating wastewater comprising: a treatment line having an inlet for introducing wastewater into the system and an outlet for discharging treated water from the system;a mixing tank operably coupled to the treatment line to receive the wastewater introduced into the treatment line;a first polymer injector operably coupled to the treatment line upstream of the mixing tank to introduce a first aqueous polymer mixture into the wastewater flowing into the mixing tank to flocculate suspended solids within the wastewater;a mixing apparatus operably coupled inline with the treatment line downstream of the mixing tank;a transfer pump operably coupled to the treatment line and configured to pump wastewater and flocculated suspended solids received into the mixing tank to the mixing apparatus;a separator operably coupled to the treatment line downstream of the transfer pump to remove flocculated suspended solids from the wastewater to form the treated water;a first polymer tank containing a batch of the first aqueous polymer mixture and operably coupled to the first polymer injector;a second polymer injector operably coupled to the treatment line and configured to introduce a second aqueous polymer mixture into the wastewater pumped between the mixing tank and the transfer pump;a third polymer injector operably coupled to the treatment line and configured to introduce the second aqueous polymer mixture into the wastewater pumped between the transfer pump and the mixing apparatus, wherein the second and third polymer injectors are configured to selectively introduce the second aqueous polymer mixture into the wastewater through one of the second polymer injector or the third polymer injector;a second polymer tank containing a batch of the second aqueous polymer mixture, the second polymer tank operably coupled to each of the second and third polymer injectors, the system configured to selectively inject the second aqueous polymer mixture into the treatment line via either the second polymer injector or the third polymer injector to further flocculate suspended solids within the wastewater;a recirculation line operably coupled to the treatment line downstream of the separator, the recirculation line recirculating at least a portion of the treated water, the system configured to: (1) form the first aqueous polymer mixture from a first portion of the recirculated portion of the treated water and a first polymer; and (2) form the second aqueous polymer mixture from a second portion of the recirculated portion of the treated water and a second polymer. 12. The system of claim 11 further comprising: a turbidity sensor operably coupled to the treatment line upstream of the first polymer injector to measure a turbidity level of the wastewater; andwherein the system is configured to: (1) adjust a flow rate of the first aqueous polymer mixture being introduced into the treatment line by the first polymer injector based on the measured turbidity level and a flow rate of the wastewater; and (2) adjust a concentration level of the first polymer in the first aqueous polymer mixture based on the measured turbidity level and a flow rate of the wastewater. 13. The system of claim 12 further comprising a sensor flow line fluidly coupled to the treatment line, the turbidity sensor operably coupled to the sensor flow line, and wherein the wastewater flowing into the sensor flow line passes through a dole valve so that the flow rate of the wastewater flowing through the sensor flow line is constant. 14. The system of claim 11 further comprising: a pH sensor operably coupled to the treatment line upstream of the first polymer injector to measure a pH level of the wastewater;a pH adjustment chemical injector operably coupled to the treatment line to introduce a pH adjustment chemical into the treatment line; andwherein the system is configured to adjust a flow rate of the pH adjustment chemical introduced into the treatment line by the pH adjustment chemical injector based on the measured pH level and a flow rate of the wastewater. 15. The system of claim 11 further comprising: the mixing tank configured to mix the first aqueous polymer mixture with the wastewater to form a first polymer treated wastewater;a variable frequency pump operably coupled to the treatment line to flow the first polymer treated wastewater from the mixing tank;a liquid level sensor operably coupled to the mixing tank to monitor a liquid level of the first polymer treated wastewater in the mixing tank; andwherein the system is configured to: (1) increase a speed of the variable frequency pump when the liquid level of the first polymer treated wastewater is above an upper threshold; and (2) decrease the speed of the variable frequency pump when the liquid level of the first polymer treated wastewater is below a lower threshold.

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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