Carbon emission material for renovation of nitrogen hydrogen nitrate pollution groundwater and production method

Abstract

The invention relates to a carbon release material for purifying groundwater polluted by nitrate nitrogen, which substantially comprises a carbon release agent, an oxygen capture agent, a KH2PO4, trace elements, coarse sand, cement and water, in which the carbon release agent provides carbon for the denitrification degradation process of the microorganism; the oxygen agent is used for capturing and consuming the dissolved oxygen in the groundwater to create an anaerobic environment; the KH2PO4 and the trace elements provide the required nutrient elements for metabolism of the microorganism; the coarse sand is used for promoting permeability of the carbon release material; the cement and the water adhere other components together in the carbon release material. A contrast test of denitrification degradation of nitrate nitrogen in the groundwater proves that the nutrition compound carbon release material in the invention can allow concentration of the dissolved oxygen in the water to decrease from 4.1mg / L to about 0.1mg / L as well as the concentration of the nitrate nitrogen to decrease from 103.4mg / L to 2.5mg / L; the degradation rate is as high as 97.6 percent while the degradation rate of the degradation rate in the contrast text is only up to 50.2 percent.

Description

technical field

[0001] The invention relates to the technical field of contaminated groundwater remediation, in particular to a composite material and a preparation method for dissolved oxygen capture, carbon source and nutrient supply in the microbial remediation process of groundwater polluted by nitrate nitrogen. Background technique

[0002] The degree of nitrate nitrogen pollution in groundwater is increasing year by year. Drinking water with a high concentration of nitrate nitrogen is not only fatal to pregnant women and infants, but also causes some cancers, and even directly leads to the "eutrophication" of surface water that is supplied by groundwater.

[0003] At present, the groundwater polluted by nitrate nitrogen is often treated by means of extraction treatment: the polluted groundwater is pumped to the surface through pumping wells, and then various sewage treatment methods are used to remove nitrate nitrogen. According to the different removal mechanism of n...