Sleeve type bioelectrochemical reactor for in-situ remediation of chlorinated hydrocarbon pollution of shallow groundwater

Abstract

The invention relates to a sleeve type bioelectrochemical reactor for in-situ remediation of shallow groundwater polluted by chlorinated hydrocarbon, in particular to a bioelectrochemical reactor for in-situ remediation of shallow groundwater polluted by halogenated hydrocarbon. The bioelectrochemical dehalogenation technology is utilized, electrons are provided for dehalogenation breathing bacteria through the biological cathode, and completion of biological dehalogenation breathing is promoted, so that the problem that exogenous electron donors in underground water are insufficient is solved. A cathode of the reactor comprises a stainless steel cylinder with holes uniformly distributed in the surface and a carbon felt; the upper section of the bottom cylinder is of a straight cylinder structure, the lower section is of a conical cylinder structure, the upper edge of the bottom cylinder is connected with the stainless steel cylinder, and the check ball is located in the lower section of the bottom cylinder. The anode is located in the stainless steel cylinder, the PVC pipe is located between the anode and the cathode, and the anode and the cathode are electrically connected through an external direct-current power source. The device can be arranged in an in-situ monitoring well with a smaller caliber, is simple and convenient to operate, and is suitable for the characteristics of complex underground water environment and inconvenient operation conditions.

Description

technical field [0001] The invention relates to a sleeve-type bioelectrochemical reactor for in-situ restoration of shallow groundwater polluted by chlorinated hydrocarbons, in particular to a bioelectrochemical reaction for in-situ restoration of shallow groundwater polluted by halogenated hydrocarbons device. Background technique [0002] Groundwater is an important freshwater resource. It is widely distributed and easy to use. It has become the main source of drinking water in most countries and regions, and more than 2 billion people use it as drinking water. my country's population accounts for 20% of the world's total population, but fresh water resources only account for 5-7% of the global fresh water resources. Groundwater resources have important strategic significance for my country's economic, social development and people's livelihood security. In my country, more than 400 cities use groundwater as drinking water source, accounting for more than 60% of the total...

AI Technical Summary

Problems solved by technology

However, in groundwater, there is a problem of insufficient electron donors. In addition, there is a competitive relationship between methanogenic bacteria, denitrifying bacteria and dehalogenating reducing bacteria, which greatly limits the effect of conventional microbial reduction and dehalogenation.

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