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Abstract: This paper aims to treat the landfill leachate before disposal. If leachate is directly disposed into environment, it creates serious problems on the surrounding soil, ground water aquifers and nearby surface water. Therefore, great attention has been directed towards new techniques based on physico-chemical process, and heavy metals removal using low-cost materials as filter media with downflow reactor. This paper presents the results of the analyses of leachate treatment from the solid waste landfill. Integrated leachate treatment processes are necessary to deal with the variations of pollutants in leachate. Characterization of microalgae–bacteria consortium cultured in land fill leach ate for carbon fixation and lipid production was carried out. To save the land and improve the energy efficiency for leachate treatment processes, the leachate recirculation process, deep shaft aeration bioreactor, aged refuse biofilter, and hydration reaction are developed and demonstrated. Deep shaft aeration reactor is efficient for the biodegradable pollutants removal,with a high NH3-N, total nitrogen, chemical oxygen demand (COD), total organic carbon (TOC) removals of 66–94%,41–64%,67–87%, 55–92%, at the organic load rate of 1.7–9.4 g COD/L day and hydrauli cretention time of 1–2 day even in the lowest ambient of –3°C, at influent COD ofbelow 7000mg/L.