The sludge sanitary landfill technology is to take necessary engineering measures to mix the sludge with other substances (mineralized garbage, curing agent, etc.) in a certain proportion to improve the soil mechanical properties of the sludge and meet the technical standard requirements for landfilling. Landfill treatment. The sludge sanitary landfill process consists of 6 operation steps, which are full mixing, unit operation, fixed-point unloading, uniform paving, repeated compaction and timely soil covering.

Vertical anti-seepage is for landfills where there is an impervious layer underground in the landfill. A vertical anti-seepage curtain wall is built around the landfill area of this kind of landfill. The curtain wall is deep to the impervious layer, making the landfill area The groundwater inside is isolated from the groundwater outside the landfill area to prevent the groundwater outside the site from being polluted. Vertical anti-seepage methods mainly include curtain grouting, anti-seepage wall and HDPE vertical curtain anti-seepage, which are often used in valley-type landfill projects.

The vertical anti-seepage system includes the sealing wall constructed by the hitting method, the sealing wall constructed by the engineering excavation method and the sealing wall constructed by the soil modification method. The sealing wall constructed by the hitting method is prefabricated by ramming or hydraulic power. The sealing wall components of this method hit the soil. The forms of the sealing wall constructed by this method include slab wall, narrow wall and squeeze sealing wall; the sealing wall constructed by the engineering excavation method is to excavate the soil layer through earthwork. The sealing wall is constructed in the excavated trench, and the net thickness of the wall is generally 0.4~1.0m; The sealing wall constructed by the soil modification method is filled and compacted to reduce the porosity and permeability of the original soil. It is lowered to form a sealed wall. Commonly used are undisturbed soil mixed in-situ sealed wall, injection wall and jet wall.