Up to now

membrane process has been adopted as one of main advanced treatment processes of landfill leachate to meet the requirement of discharge standard. However

a large amount of membrane leachate concentrate with more pollutants is produced

which will cause serious secondary pollution without proper treatment and disposal. In this work

various treatment processes of leachate concentrate from the aspects of principle

application effect

cost

and technical development were classified and discussed according to the published related studies and engineering application cases. The characteristics

existing problems

and application scope of recirculation

physical treatment (submerged combustion evaporation and mechanical vapor recompression)

chemical treatment (incineration

advanced oxidation processes

and supercritical water oxidation)

physical and chemical treatment (flocculation

adsorption

membrane separation

and solidification/stabilization)

and coupled treatment processes with or without membrane were also reviewed. Finally

the treatment routes for different types of leachate concentrate were concluded

and the future prospect of leachate concentrate treatment was put forward

aiming to provide technical reference for further study and full-scale treatment of leachate concentrate.