Corrosion-resisting and temperature-resisting modified pumice-doped polylactic acid-polypropylene biofilm composite fiber carrier material and preparation method therefor

Abstract

The invention relates to a biofilm carrier material, particularly a corrosion-resisting and temperature-resisting modified pumice-doped polylactic acid-polypropylene biofilm composite fiber carrier material and a preparation method therefor. According to the invention, the traditional pure inorganic and organic carrier media are mixedly used; fibers prepared from high molecular materials such as polypropylene, polylactic acid and the like have better compatibility with microorganisms and have corrosion and aging resistance; modified pumice and multiwalled carbon nanotubes doped in the fibers have uniform and efficient adsorption abilities; montmorillonite enables the fibers to obtain a certain water adsorption ability, so that the fibers can expand in water to increase the surface area; and fiber bundles soaked in a composite silica sol can adhere and adsorb a carbon source in the fibers to accelerate biofilm culturing. The composite fiber carrier material is light in weight, large in surface active area and rich in carbon source, and the change of environmental temperature on the adsorption ability is small. A filler produced from the material has the advantages of being good in flowability, difficult to agglomerate, lasting and efficient and the like, so that the water quality purification effect is further enhanced.

Description

technical field [0001] The invention relates to a biofilm carrier material, in particular to an anti-corrosion and temperature-resistant polylactic acid-polypropylene biofilm composite fiber carrier material doped with modified honeycomb stone and a preparation method thereof. Background technique [0002] Biofilm wastewater treatment technology is a technology that fixes microorganisms on the carrier to form a biofilm to degrade the pollutants in the wastewater. Therefore, the performance of the biofilm carrier will directly affect the efficiency of sewage treatment. To obtain efficient water treatment effects, It is particularly important to select suitable and efficient carrier materials. At present, the most widely used carrier materials are mainly soft polymer materials such as polyethylene, polystyrene, polyamide, and polypropylene, and inorganic fillers such as activated carbon, slag, and limestone. However, these Materials have some defects in biocompatibility, stabi...

AI Technical Summary

Problems solved by technology

Honeycomb stone has a unique pore structure and good adsorption capacity, and has strong adsorption capacity for organic and inorganic pollutants in aqueous solution. It is also used to make biofilm and enzyme preparation carrier, and it has emerged in the field of sewage treatment. However, due to the difference between materials, their physical properties and chemical composition have great changes, and the adsorption boundary conditions and adsorption capacity will also be different, which will affect its film-hanging performance and water purification effect.