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Soil ex-situ leaching system and method thereof

A soil and leaching technology, applied in the field of soil ex-situ leaching system, can solve problems such as no cost advantage, and achieve the effects of stable effect, short treatment period and simple operation

Inactive Publication Date: 2015-09-02
JIANGSU GAIYA ENVIRONMENTAL SCI & TECH CO LTD
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Problems solved by technology

[0003] Among them, the soil fine particle content refers to the percentage of soil fine particles, which is a key factor determining the effect and cost of soil elution restoration. Fine particles generally refer to powder / clay particles with a particle size of less than 63-75 μm, usually ectopic soil Elution treatment is not cost-effective for soils with a fines content above 25%

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  • Soil ex-situ leaching system and method thereof

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Embodiment Construction

[0029] Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and the embodiments.

[0030] Reference figure 1 As shown, a soil ex-situ leaching system mainly includes a soil pretreatment unit, a physical separation unit, a synergistic elution unit, a wastewater treatment and reuse unit, and a control unit arranged in sequence. For soil contaminated by heavy metals or organic pollutants, a volatile gas control unit is also provided at the synergistic elution unit for waste gas collection and treatment of the collected waste gas.

[0031] Continue to refer figure 1 , An ex-situ soil leaching method, the method mainly includes the following steps:

[0032] Step 1) Detect basic parameters of contaminated soil in the early stage and formulate site remediation targets based on the parameters. The detection parameters include soil particle size composition, soil type, physical state and humidity, pollutant type and concentration, soil o...

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Abstract

The invention relates to a soil ex-situ leaching system and a method thereof. The system is mainly composed of a soil pretreatment unit, a physical separation unit, a synergistic elution unit, a wastewater treatment and recycling unit and a control unit which are arranged successively. The method mainly comprises the following processes: soil pretreatment, soil separation stage-treatment, direct elution or synergistic elution treatment, entry to a sludge dewatering system, and corresponding treatments of mud cake based on pollution properties. By the technical scheme, soil containing heavy metal, semi-volatile organic pollutants and non-volatile organic pollutants can undergo leaching treatment. In addition, leaching cost per unit area is low, treatment period is short, and operating maintenance and monitoring are convenient.

Description

Technical field [0001] The invention relates to the field of soil environmental engineering, in particular to a soil ex-situ leaching system and method. Background technique [0002] Pollutants in contaminated soil are mainly distributed on smaller soil particles. The key technical parameters that affect the effect of soil elution and remediation include: soil fine particle content, nature and concentration of pollutants, water-soil ratio, elution time, elution Frequency, choice of synergist, treatment of synergistic elution wastewater and chemical reuse. [0003] Among them, the content of soil fine particles refers to the percentage of soil fine particles, which is a key factor in determining the effect and cost of soil elution and restoration. Fine particles generally refer to powder / clay particles with a particle size less than 63-75μm, usually ex-situ soil The elution treatment has no cost advantage for soils with a fine particle content of more than 25%. [0004] The inventio...

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Application Information

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IPC IPC(8): B09C1/02
Inventor 程功弼
Owner JIANGSU GAIYA ENVIRONMENTAL SCI & TECH CO LTD
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