1. sanitary landfill: this disposal method is simple, easy to operate, low in cost, and the sludge does not need to be highly dehydrated, so it has strong adaptability. However, there are also some problems in sludge landfill, especially the formation of leachate and gas. Leachate is a seriously polluted liquid. If the landfill site is selected or operated improperly, it will pollute the groundwater environment. The gas produced by landfill is mainly methane, which will cause explosion and combustion if proper measures are not taken.
2. Direct use of land: Because of the advantages of less investment, low energy consumption, low operating cost and organic parts can be converted into soil improvers, direct use of land is considered as the most promising disposal method. Scientific and rational land use can reduce the negative impact of sediment. The utilization of forest land and municipal greening has become an effective way to utilize silt land because it is not easy to pollute the food chain. Silt is used for the restoration and reconstruction of severely disturbed land (such as mine land, forest logging field, landfill, severely damaged area on the surface, etc.). ), reducing the potential threat of sediment to human life, not only disposing of sediment but also restoring the ecological environment.
3. Incineration: Incineration of wet sludge after drying is widely used. Incinerating sludge without drying is not only very difficult, but also uneconomical in terms of energy consumption. The sludge treatment method with incineration as the core is the most thorough sludge treatment method, which can carbonize all organic matter, kill pathogens and minimize sludge volume. However, its disadvantages are large investment in treatment facilities and high treatment cost.