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The geometric characteristic data of fillers mainly include specific surface area, porosity, filler factor, etc.

The choice of filler types should consider the requirements of the separation process.

Under the same operating conditions, the larger the specific surface area of the filler.

Packing specification refers to the nominal size or specific surface area of the packing.

The material of the filler is divided into three categories: ceramic, metal and plastic.

The geometric characteristic data of fillers mainly include specific surface area, porosity, filler factor, etc.

In chemical engineering, filler refers to the inert solid materials installed in the packed tower, such as Pall rings and Raschig rings, etc.

Compared with the activated sludge method and the fixed-filler biofilm method.