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A treatment system for pahs in groundwater and a method for using the same

A treatment system and groundwater technology, applied in the direction of contaminated groundwater/leachate treatment, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem of inability to realize the conversion and removal of pollutants and affect the catalytic degradation of laccase Efficiency, limiting the application of laccase, etc., to achieve the effect of prolonging the residence time, improving the treatment effect and improving the degradation efficiency

Active Publication Date: 2016-09-14
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still many limiting factors and problems with laccase: first, laccase is susceptible to denaturation and inactivation under the influence of environmental conditions during the action process, which limits its industrial application to a certain extent; second, the transmission of laccase and pollutants The mass efficiency is low, which directly affects the catalytic degradation efficiency of laccase (PV.Iyer, L.Ananthanarayan.Enzyme stability and stabilization—aqueous and non-aqueous environment[J]. Process Biochemistry, 2008,43:1019-1032. ), limiting application of laccase
Although EK technology can improve the treatment effect of organic matter, it can only be used as a strengthening and migration technology, and cannot realize the conversion and removal of pollutants

Method used

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  • A treatment system for pahs in groundwater and a method for using the same
  • A treatment system for pahs in groundwater and a method for using the same

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Embodiment 1

[0025] A system for treating PAHs in groundwater and a method for using the same. The processing system described is figure 1 As shown, it includes an anode graphite electrode 10, a cathode graphite electrode 4, a mesh grid 6 and a water tank 5. An anode graphite electrode 10 is provided on one side of the water tank 5, and a cathode graphite electrode 4 is provided on the other side of the water tank 5. The anode graphite electrode 10 and the cathode graphite electrode 4 are oppositely arranged, and a grid-like grille6. Such as figure 2 As shown, the mesh grid 6 is filled with immobilized laccase 7 . Such as figure 1 As shown, the distance L between the mesh grid 6 and the anode graphite electrode 10 1 It is 0.3~0.6 times of the distance L between the anode graphite electrode 10 and the cathode graphite electrode 4. A water inlet 8 is provided at the bottom of the water tank 5 near the anode graphite electrode 10, and a constant current pump 9 is installed at the water ...

Embodiment 2

[0032] A system for treating PAHs in groundwater and a method for using the same. Except following technical parameter, all the other are with embodiment 1:

[0033] The distance L between the mesh grid 6 and the anode graphite electrode 10 1 It is 0.5~0.8 times of the distance L between the anode graphite electrode 10 and the cathode graphite electrode 4.

[0034] The preparation method of the immobilized laccase 7 is as follows: adding a porous adsorption material to the laccase solution, manually stirring for 10-15 minutes, and standing for 7-10 hours to obtain a porous material adsorbed with laccase; The porous material was added to 3~5wt% sodium alginate solution, and then 1wt% calcium chloride solution was used as a cross-linking agent to make immobilized laccase.

[0035] The porous adsorption material is one of porous glass beads, silica and cellulose.

[0036] The use method of the treatment system of PAHs in the ground water is that the flow velocity of the ground...

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Abstract

The invention relates to a treatment system for PAHs in groundwater and a method for using the same. Its technical scheme is: an anode graphite electrode (10) is provided on one side of the water tank (5), a cathode graphite electrode (4) is provided on the other side of the water tank (5), and the anode graphite electrode (10) and the cathode graphite electrode (4) face each other Set, a grid-like grid (6) is housed between the anode graphite electrode (10) and the cathode graphite electrode (4), and the grid-like grid (6) is filled with immobilized laccase (7); A water inlet (8) is provided at the bottom of the water tank (5) at the graphite electrode (10), and a constant flow pump (9) is installed at the water inlet (8). The upper part of the water tank (5) at the electrode (4) is provided with a drain port (3). The flow velocity of the groundwater in the treatment system passing through the mesh grille (6) is 0.01-0.5m / min, and the voltage of the DC stabilized power supply is 4-8V. The invention has the characteristics of reliable operation, high efficiency and no secondary pollution.

Description

technical field [0001] The invention belongs to the technical field of PAHs treatment in groundwater. In particular, it relates to a treatment system for PAHs in groundwater and a method for using the same. Background technique [0002] Polycyclic aromatic hydrocarbons (Polycyclic Aromatic Hydrocarbons, PAHs) usually refer to condensed ring compounds containing two or more rings arranged in a linear, angular or clustered shape, and belong to hydrophobic organic pollutants. However, PAHs have strong carcinogenic, mutagenic and teratogenic properties, and are the largest category of environmental carcinogenic chemicals, which have a strong inhibitory effect on microbial growth. Due to their stable ring structure, PAHs are not easily utilized by microorganisms and widely exist in the human ecological environment. At present, PAHs have also been detected in groundwater. In order to protect human health and ecological environment, the research on the purification and treatment ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/00C02F103/06C02F101/32
CPCC02F3/005C02F3/342C02F2101/327C02F2103/06
Inventor 任大军王春杏李倩张淑琴冯涛
Owner WUHAN UNIV OF SCI & TECH
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