The coagulation-flocculation and sedimentation beaker test is carried out to deal with the hydraulic ash of the recirculating water in the shell coal gasification process.

• 含有金属离子成分的酸性废水一般采用石灰乳中和法进行处理,但该方法处理后生成的沉淀密度较小,沉降效率较低,外排水水质变化较大。