[특허]System and method for decontamination of contaminated ground

System and method for decontamination of contaminated ground 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B10D-003/38
출원번호	US-0701110 (1991-05-16)
발명자 / 주소	Hobby Michael M. (3985 W. Indigo Meadow Cir. Bennion UT 84118)
인용정보	피인용 횟수 : 40 인용 특허 : 0

초록 ▼

A system and method for the decontamination of contaminated ground is described. Contaminated soil gas containing the contaminant is removed from the contaminated ground. Contaminants are separated from the contaminated gas and treated to lessen an environmental hazard of the contaminant. Contaminants are preferably treated by non-thermal oxidation. Residual soil gas, including any oxygen, unoxidized contaminants, and oxidation products (water vapor and carbon dioxide) are returned to the ground, where unoxidized contaminants are subject to oxidation by soil microorganisms. The returned residual soil gas is recirculated through the decontamination system.

대표청구항 ▼

A method for decontamination of contaminated ground, said method comprising: (a) removing soil gas contaminated with a contaminant from the ground, and (b) returning said contaminated solid gas to the ground for distribution of said contaminant over a larger area of ground to facilitate natural biodegradation of said contaminant in the ground. A system for decontamination of contaminated ground in a contaminated ground region, said system comprising: (a) a plurality of vent wells located around the periphery of the contaminated ground region to establish a zone of low pressure, (b) at least one return well located in said contaminated ground region to establish a zone of high pressure, (c) a removal means, (d) a separation means, and (e) an injection means; wherein said removal means is a means for removal of soil gas contaminated with a contaminant from said contaminated ground region via said vent wells and a means for introducing said removed contaminated soil gas to said separation means; wherein said separation means is a means for separating said contaminant from said removed contaminated soil gas, which separation results in separated contaminant and residual soil gas; wherein said injection means is a means for returning said residual soil gas, including any residual contaminant, to said contaminated ground region via said at least one return well; and wherein said zone of high pressure and said zone of low pressure causes said returned residual soil gas to flow from said at least one return well to said vent wells. A method for decontaminating contaminated ground, said method comprising: (a) removing soil gas contaminated with a contaminant from the ground, (b) separating said contaminated from said contaminated soil gas, which separation results in separated contaminant and residual soil gas, (c) treating said separated contaminant to lesson an environmental hazard of said separated contaminant, and (d) returning said residual soil gas to the ground; wherein the return of said residual soil gas to the ground results in recirculation of said residual soil gas as contaminated soil gas in steps (a), (b), (c) and (d); wherein (a), (b), (c) and (d) form a closed loop system; wherein the ground includes a vadose zone; and wherein said contaminated soil gas is removed from the vadose zone in step (a). A decontamination system for decontamination of contaminated ground, said system comprising: (a) a removal means, (b) a treatment means, and (c) an injection means; wherein said removal means is a means for removal of soil gas contaminated with a contaminant from the ground and for introduction of said removed contaminated soil gas to said treatment means; wherein said treatment means is a means for treating said contaminant to lessen an environmental hazard of said contaminant, which treatment results in a residual soil gas; and wherein said injection means is a means for returning said residual soil gas to the ground for recirculation through (a), (b) and (c); wherein (a), (b) and (c) form a closed loop system.

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