Abstract: The membrane concentrate produced from landfill leachate has always been a technical problem in the industry. In order to explore a stable and reliable treatment process. The concentrated leachate from a typical domestic waste landfill in Guangzhou was taken as the research object, and conducted an experimental study on the full quantitative treatment technology of membrane concentration. The main technical routes included chemical softening pretreatment, two-effect negative pressure evaporation, centrifugal separation, deodorization and other process units. The research results showed that this concentrated liquid treatment technology could achieve continuous and stable operation at a concentration multiple of 10 times. After treatment, the condensed water could meet the standard for discharge. After solidification, the salt mud could meet the landfill requirements. The odor treatment effect was good. At the same time, the coreheat exchanger of the evaporation device had good anti scaling performance.

Key words: landfill leachate, membrane concentrate, negative pressure evaporation, concentration ratio