Diatomite has rich pores and specific surface area. If it is added to activated sludge, microorganisms can adhere through its porous structure, and diatomite can be used as the carrier of microorganisms, so as to improve the biological activity of microorganisms, reduce sludge bulking, and then improve the effluent index.

Found that adding diatomite to the activated sludge system can improve the biomass in the wastewater treatment system containing phenolic compounds and enhance the sedimentation performance of sludge; The added diatomite can be used as the carrier of microorganisms to improve the biomass. The addition of diatomite can improve the removal rate of COD and total phenol in wastewater.