Water-permeable electrochemical microbial reaction walls and methods of use thereof

Abstract

The invention relates to a water-permeable electrochemical microbial reactive barrier and an application method thereof. The water-permeable electrochemical microbial reactive barrier comprises at least a conductive fibrous layer and at least a cathode. The conductive fibrous layer is applied with an appropriate voltage. All traditional chemotype or biotype water-permeable reactive barriers have a problem that an oxidant (electron accepter of microbes) which is depleted needs continuous supplement by replacement or adding of the oxidant. According to the invention, the conductive fibrous layer with high surface area is adopted as the electron accepter of microbes in vitro, so the problem of continuous supplement or replacement of the oxidant of traditional methods is effectively solved. The invention provides the water-permeable electrochemical microbial reactive barrier, and the reactive barrier can be maintained to normally operate by directly attaching relevant pollutant decomposers to the surface of the fibrous layer by in situ microbes to grow, and needing only proper voltage to lead out electrons generated by the biochemical reaction of the in situ microbes without adding applied oxidants.

Description

technical field [0001] The invention is a water-permeable electrochemical microbial reaction wall, in particular a water-permeable electrochemical microbial reaction wall which can effectively decompose organic pollutants without adding any chemical agents to avoid polluting groundwater. Background technique [0002] The so-called reaction wall is one of the measures to prevent pollutants from flowing with groundwater. It is installed in gas stations, oil refineries, and even some petrochemical industrial plants to avoid the spread of groundwater polluted by organic pollutants. Its use is to pollute Such devices are arranged in the vertical direction downstream of the groundwater. [0003] The traditional reaction wall is a permeable reaction wall. Its principle is that when the pollutants flow through the permeable reaction wall, they will be blocked by the permeable reaction wall, and then through physical methods (such as precipitation, etc.), chemical methods (such as O...

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Problems solved by technology

[0004] However, most of the problems with physical methods are not effective, because the nature of pollutants is not the same, so not all pollutants can be removed by the same physical method, and it will consume manpower and material resources to remove the remaining Pollutants

If the chemical oxidation mechanism is used to degrade organic pollutants, there will be a problem that the reactants are exhausted and must be replaced

If it is degraded by a biological mechanism, there will be a problem that a sufficient amount of electron acceptors must be supplied, and a large amount of power must be consumed to supply a sufficient amount, and at the same time, it is easy to cause uneven mass transfer.

Therefore, it is necessary to constantly replenish or add oxidants (electron suppliers for microorganisms), which will inevitably lead to an increase in the cost of remediation

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