Method for remedying polluted groundwater in refuse landfill with PRB (permeable reactive barrier) technology

Abstract

The invention discloses a method for remedying polluted groundwater in a refuse landfill with a PRB (permeable reactive barrier) technology. The method comprises steps as follows: conducting polluted site feature survey including natural environment conditions, hydrogeological conditions and landfill groundwater quality; obtaining refuse landfill pollution features through experiment monitoring, groundwater pollution condition evaluation and groundwater pollution trend assessment; determining the type of a PRB filling medium with a column experiment method, and determining the degradation constant of the filling medium for major pollutants through an adsorption kinetics experiment; designing the structure form, the mounting position and direction, width, height and burial depth of a PRB in the refuse landfill, and determining the permeability coefficient through Feflow simulation. Ridges on east and west sides are approximately equivalent to a natural water barrier wall by using the natural geographic advantage, the continuous PRB type design is adopted, with the adoption of design, the advantage that the funnel-water guide gate type PRB can better control mounting of a reaction unit and interception of pollutants can be used, and the advantage of economic cheapness of the continuous PRB can be used.

Description

technical field [0001] The invention belongs to the field of garbage landfill water pollution control, and in particular relates to a method for repairing groundwater pollution of a garbage landfill site through an active percolation wall technology. Background technique [0002] During the sanitary landfill process, the garbage is almost isolated from the air. Due to various effects such as anaerobic reaction, organic matter decomposition, and rainwater leaching, mixed metabolites are produced to form a high-concentration organic liquid, namely "garbage leachate". The filtrate is a high-concentration ammonia-nitrogen waste liquid. The complexity of garbage components and the imbalance of C / N lead to the accumulation of ammonia-nitrogen in landfills. High-concentration ammonia-nitrogen has a strong inhibitory effect on microbial activity, which restricts garbage stabilization and landfill leachate treatment. the bottleneck. For the remediation of leachate-contaminated groun...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for repairing groundwater pollution in landfill sites with active percolation wall technology. The design of PRB is optimized by combining site surveys, numerical simulations, and laboratory tests, aiming to solve the problem of groundwater pollution in landfill sites. The design scheme of polluting PRB is only for the research of PRB filling medium, the design parameters are not accurate enough, and the pertinence and applicability are low

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