Device and method for repairing underground water ammonia nitrogen pollution in normal position and abnormal position combined mode
A joint restoration and groundwater technology, applied in chemical instruments and methods, water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as no obvious restoration effect of PRB, damage to hydrogeological conditions, and large area of land occupation , to achieve the effect of increasing repair efficiency, reducing expenses and saving energy
Inactive Publication Date: 2013-02-13
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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Problems solved by technology
If the permeability coefficient of the soil layer in the polluted area is small and the groundwater flow rate is small, the traditional PRB has no obvious repair effect; when the groundwater is repaired in a large area, the traditional PRB repair technology needs to excavate a large area and occupy a large area Land and serious damage to hydrogeological conditions, and require a lot of economic expenditure
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Embodiment 1
[0046] Conditions in this area: the buried depth of the groundwater level is 3m, the vadose zone and the aquifer are mainly soft soil, the average particle size is -7 cm / s. Groundwater quality in the polluted area: pH is 8.2; ORP is 128mV; average concentration of ammonia nitrogen in groundwater is 21mg / L. Combined repair system: inner diameter of water injection well and pumping well pipe is 10cm; thickness of annular PRB is 20cm; thickness of plastic drainage plate is 2cm; pump speed of water pump is 400ml / min.
[0047] After 75 days of stable operation, the water quality was monitored, and the results showed that there was no obvious subsidence on the ground, and the treatment effect on ammonia nitrogen was good, and there was no serious blockage.
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Abstract
A device for repairing underground water ammonia nitrogen pollution in a normal position and abnormal position combined mode mainly comprises a pumping well and a water injection well, wherein a water suction pump is installed in a well pipe of the pumping well, and a boosting pump is installed in a well pipe of the water injection well; well sieves are installed on the parts of the well pipes of the pumping well and the water injection well under the water level; a water conveying pipeline is connected between the water suction pump and the boosting pump; and the well pipes of the pumping well and the water injection well are respectively installed in respective protecting walls with pores of the pumping well and the water injection well, and filling materials are filled between the well pipes and the protecting walls to form a permeable reaction wall. The invention further discloses a method for repairing underground water ammonia nitrogen pollution by utilizing the device.
Description
technical field [0001] The invention belongs to the technical field of groundwater restoration, and in particular relates to a device for repairing ammonia nitrogen pollution in groundwater with an in-situ-existing combined annular PRB. [0002] The invention also relates to a method for repairing groundwater ammonia nitrogen pollution by using the device. Background technique [0003] Groundwater is one of the guarantees for the survival of human beings around the world. With the increasing prosperity of the society, the demand for groundwater in my country's industrial and agricultural development is increasing day by day. The discharge of ammonia nitrogen in various industrial wastewater is the main source of ammonia nitrogen pollution in groundwater. In addition, the denitrification of urban sewage plants is not complete, so that the ammonia nitrogen in the effluent usually does not meet the national sewage discharge standards. The content of ammonia nitrogen in surfac...
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IPC IPC(8): C02F1/00
Inventor 白顺果席北斗姜永海李翔袁志业安达杨昱张进保
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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