Composite coagulant for landfill leachate treatment and preparation method thereof

The invention relates to the technical field of environmental governance, in particular to a composite coagulant for landfill leachate treatment and a preparation method thereof. The composite coagulant comprises an inorganic coagulant, an organic flocculant and a nano coagulant aid, the inorganic coagulant is a mixture of polysilicate aluminum ferric and basic aluminum chloride; the organic flocculating agent is poly (dimethyl diallyl ammonium chloride); the nano coagulant aid is a mixture of nano calcium oxide, nano ferroferric oxide and activated carbon. The composite coagulant disclosed by the invention has the characteristics that suspended solids and soluble organic matters in water are efficiently removed, the precipitation speed is high, flocculation and sedimentation are realized in one step, stable large flocculated particles can be formed in sewage, the load of subsequent leachate treatment equipment is effectively reduced and the like through synergistic action. 本发明涉及环境治理技术领域，尤其涉及一种垃圾渗滤液处理用复合混凝剂及其