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Method for in situ restoring groundwater azotate pollution with corn stalk

A technology of corn stalks and in-situ restoration, applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve the waste of biomass energy, pollute the atmospheric environment, and destroy farmland soil microbial bacteria To achieve the effect of avoiding environmental pollution, maintaining the ecological balance of microorganisms, and solving the problem of comprehensive utilization

Inactive Publication Date: 2011-04-20
HEFEI UNIV OF TECH
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Problems solved by technology

[0007] Corn is the main autumn crop in the northern region. Traditionally, open-air burning of corn stalks is used. This method pollutes the air environment, because burning destroys the soil microbial flora in the farmland, and is also a waste of biomass energy.

Method used

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  • Method for in situ restoring groundwater azotate pollution with corn stalk
  • Method for in situ restoring groundwater azotate pollution with corn stalk
  • Method for in situ restoring groundwater azotate pollution with corn stalk

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Embodiment

[0049] Take the farmland area with serious nitrate pollution as an example. The farmland area has surface and underground water systems. The upstream water comes from domestic sewage from residential areas, and there are multiple surface inflow inlets. There are ditches for industrial nitrogen-containing wastewater to discharge from the surface. Infiltrated into the farmland, due to the excessive use of nitrogen fertilizer and sewage irrigation, the nitrate nitrogen content in the groundwater of the farmland area is between 30-70mg / L, which is 20mg / L higher than the third-class water standard in my country; the downstream is a lake, and the farmland groundwater system is recharged through underground lake.

[0050] In situ bioremediation of groundwater is carried out as follows:

[0051] 1. In-situ remediation method for nitrate pollution of groundwater system in farmland areas:

[0052] a. Use electromagnetic survey (EMlectromagnetic Survey, EM) technology to conduct on-site s...

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Abstract

The invention relates to a method for remedying the nitrate pollution of underground water in situ with maize straws, which is characterized in that maize straws or a maize straw hydrolysate serving as a denitrification carbon source and flora-enriched liquid rich in denitrifying bacteria florae are added in nitrate polluted underground water to remove nitrate nitrogen from underground water through bio-denitrification. The method realizes the harmless use of biomass maize straws and remedies the nitrate pollution of underground water effectively.

Description

technical field [0001] The invention relates to a method for remediating pollutants, in particular to an in-situ remediation method for nitrate-contaminated groundwater, specifically a method for removing and preventing nitrate-contaminated groundwater by using corn stalks or / and corn stalk hydrolyzate and denitrifying bacterial flora Methods of groundwater nitrate contamination. Background technique [0002] The pollution of nitrate in groundwater has become increasingly serious since the 1960s. Because of its stable nature and high solubility, it migrates with groundwater and has become the most common environmental factor for groundwater pollution in many areas of the world (especially lake basins). The excessive use of agricultural chemical fertilizers, the sharp increase in industrial sewage discharge, and the large-scale sewage irrigation of farmland have led to serious nitrate pollution in groundwater. [0003] A large amount of nitrate in groundwater is harmful to t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/34C02F3/28
Inventor 钱家忠刘咏陈天虎蒋欣源
Owner HEFEI UNIV OF TECH
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