Packing medium for permeable reactive barrier and application of packing medium to aspect of in-situ treatment on underground water nitrate pollution and method thereof
A technology of infiltrating reaction walls and filling media, which is applied in the fields of water pollutants, chemical instruments and methods, and contaminated groundwater/leachate treatment, etc. and other problems, to achieve the effect of low operation and management, low cost and little secondary pollution
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Embodiment 1
[0038] use figure 1 In the water treatment system, a homogeneous mixture of polyhydroxyalkanoate and ceramsite is filled in the R1 biological packed bed reactor as a treatment group, and the particle diameters of the polyhydroxyalkanoate and the ceramsite are respectively 4 to 6.5mm and 5-8mm, the mass ratio of the two is 100:2817; ceramsite is filled in the R2 biological packed bed reactor as the control group, the filling height is 40cm, and the effective volume is 1567ml. When the concentration of nitrate nitrogen in the influent is in the range of 44.75-54.4mg / L and the hydraulic retention time (HRT) is 5.2h, the water outlet of the bioreactor R1 in the start-up operation phase (3d, 4d, 6d, 9d, 11d) Sampling of effluent from S1, S2, S3, S4 and S4 outlet of bioreactor R2, analysis and determination of nitrate nitrogen concentration and pH value.
[0039] It was found that after 11 days of operation, the concentration of nitrate nitrogen in each outlet of the treatment grou...
Embodiment 2
[0041] use figure 1 In the water treatment system, a homogeneous mixture of polyhydroxyalkanoate and ceramsite is filled in the R1 biological packed bed reactor as a treatment group, and the particle diameters of the polyhydroxyalkanoate and the ceramsite are respectively 4 to 6.5mm and 5-8mm, the mass ratio of the two is 100:2817; ceramsite is filled in the R2 biological packed bed reactor as the control group, the filling height is 40cm, and the effective volume is 1567ml. When the concentration of nitrate nitrogen in the influent is in the range of 46.50-68mg / L and the hydraulic retention time (HRT) is 2.6h, the bioreactor in the operation stage (3d, 10d, 17d, 23d, 24d) of the biological packed bed reactor Sampling of water outlets S1, S2, S3, S4 of R1 and S4 outlet of bioreactor R2, analysis and determination of nitrate nitrogen concentration and pH value.
[0042] During the operation of the reactor, the hydraulic retention time is only half of that during the start-up p...
Embodiment 3
[0044] On the vertical path of the inflow and outflow of groundwater polluted by nitrates, a 10-40cm thick permeable reaction wall constructed by a homogeneous mixture of polyhydroxyalkanoate and ceramsite is set, and the polyhydroxyalkanoate is mixed with the The particle sizes of the ceramsite mentioned above are 4-6.5mm and 5-8mm respectively, and the mass ratio of the two is 100:2817; after 11-23 days of continuous operation, the concentration of nitrate nitrogen in the effluent is below 3mg / L.
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