Organic bank-soil leaching system for repairing heavy metal and petroleum soil contamination

A soil pollution and petroleum technology, applied in the field of biopillar-soil leaching system, can solve the problems of destroying soil microaggregate structure, groundwater pollution, secondary pollution, etc., and achieve the effect of simplifying the system, maintaining fertility and saving costs

Pending Publication Date: 2017-05-24
上格环境科技(上海)有限公司
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Problems solved by technology

[0007] It is more practical and economical to use column leaching or pile leaching for soil leaching, which is suitable for small area and heavily polluted soil treatment, but it is also easy to cause secondary pollution, resulting in leaching and precipitation of some nutrients, destroying soil micro-organisms. Aggregate structure, and easily lead to groundwater pollution

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  • Organic bank-soil leaching system for repairing heavy metal and petroleum soil contamination
  • Organic bank-soil leaching system for repairing heavy metal and petroleum soil contamination

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Embodiment Construction

[0028] The idea, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings, so as to fully understand the purpose, features and effects of the present invention.

[0029] The present invention is heterotopic soil remediation. After clearing and excavating the polluted soil, it enters the system of the present invention for processing after certain pretreatment. The pretreatment is mainly through crushers and screening machines to crush large pieces of soil to a particle size of less than 2.5cm, and separate impurities such as stones and garbage after screening. Add sawdust and straw to the polluted soil after sieving as soil bulking agent to increase the porosity of the soil.

[0030] Such as figure 1 and figure 2 As shown, a biopile-soil leaching system for repairing heavy metal and petroleum soil pollution includes a biopile system, nutrient and water addition and leaching system, air su...

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Abstract

The invention relates to an organic bank-soil leaching system for repairing heavy metal and petroleum soil contamination. The organic bank-soil leaching system for repairing heavy metal and petroleum soil contamination comprises an organic bank system, a nutrient-water adding and leaching system, an air feeding system and a liquid-gas collecting and processing system. A soil pile body base layer is composed of at least one base layer unit. An inputting pipe net is evenly laid above a soil pile body. Nutrient solution and leaching agent adding tanks alternately convey a nutrient solution, water and a leaching agent to the inputting pipe net. Leachate collecting troughs are laid in the centers of the base layer units. The base layer units incline from the periphery to the leachate collecting troughs. Leachate and gas extraction patterned pipes are arranged in the leachate collecting troughs. Air feeding pipes are inserted in the soil pile body and matched with the leachate and gas extraction patterned pipes to form air flowing circulation in an organic bank. Through reasonable combination of the organic bank and soil leaching, the organic bank-soil leaching system is simplified, different soil pollutant combinations can be effectively repaired, and the original use functions of soil are kept.

Description

technical field [0001] The invention relates to the technical field of contaminated soil remediation, in particular to a biopile-soil washing system for remediating heavy metal and petroleum soil pollution. The system is mainly used in the restoration and improvement of heavy metal and petroleum contaminated soil in the environmental protection industry. Background technique [0002] Soil pollution involves a wide variety of pollutants, mainly various organic pollutants and heavy metal pollutants, such as pesticides, petroleum hydrocarbons, polychlorinated biphenyls, mercury, lead, arsenic and so on. When there are too many harmful substances in the soil and exceed the self-purification capacity of the soil, the composition, structure and function of the soil will change, the microbial activities will be inhibited, and the harmful substances or their decomposition products will gradually accumulate in the soil through "soil→plant→ Human body", or indirectly absorbed by the h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/02B09C1/10B09C1/00
CPCB09C1/005B09C1/02B09C1/10
Inventor 金学锋谢辉卢芳文孙海波
Owner 上格环境科技(上海)有限公司
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