The application provides a Yunnan
red soil-based composite porous ceramsite and a preparation method and application thereof, and the preparation method of the Yunnan
red soil-based composite porous ceramsite comprises the following steps: mixing Yunnan
red soil particles,
sepiolite powder and
biomass powder to obtain a mixture; granulating the obtained mixture into balls after stirring the mixture uniformly with water to obtain green balls; and
drying and calcining the obtained green balls at high temperature to obtain the composite porous ceramsite. The Yunnan red soil,
sepiolite and
biomass are mixed and granulated, and then calcined into the ceramsite, the ceramsite has the advantages of a large specific surface area, a high
porosity, good adhesion of microorganisms on the surface and a high bacterial abundance, and can achieve a good
denitrification effect; and the high-
calcium minerals contained in the ceramsite are beneficial to combination with
phosphorus to generate precipitates with a smaller
solubility product, and the ceramsite also has a good
phosphorus removal effect; therefore, when the composite porous ceramsite is used for
sewage treatment, not only is the
treatment effect good and the purification efficiency high, but also the
wastewater can be discharged up to the standard, and the composite porous ceramsite has high practicability.