Efficient integrated water purification equipment polymer and CNTs composite filter material for sewage treatment and preparation method of material

Abstract

The invention discloses an efficient integrated water purification equipment polymer and CNTs composite filter material for sewage treatment and a preparation method of the material, and belongs to the technical field of advanced sewage treatment. The composite filter material is prepared from fiber yarns prepared from a polymer material and a modified CNTs material, wherein the pore diameter of the composite filter material is 0.03-0.7 [mu]m, the void ratio is 40%-80%, the ratio of the polymer material to the modified CNTs material is 95:5-99.8:0.2, and the diameter of fiber yarns prepared from the polymer material and the modified CNTs material is 5-70 [mu]m. When the composite filter material is used for water treatment, the turbidity and suspended matter removal rate reaches 95% or above, the CODCr, BOD5 and ammonia nitrogen removal rate reaches 28% or above, the fecal coliform count removal rate reaches 20% or above, the filter speed is six times that of sand filtration, the effluent quality is superior to that of a microfiltration membrane, and the composite filter material has antibacterial properties and adsorption properties and has broad market application prospects.

Description

technical field [0001] The invention belongs to the technical field of advanced sewage treatment, and in particular relates to a high-efficiency integrated water purification equipment polymer and CNTs composite filter material for sewage treatment and a preparation method. Background technique [0002] With the growth of urban population and the development of industrial and agricultural production, the amount of sewage discharge is increasing day by day, and the national environmental protection supervision department has increasingly strict standards for sewage discharge. At present, the advanced treatment of sewage often requires ultra- and microfiltration membrane technology, but the investment cost of this technology is relatively high. For reclaimed water reuse and "zero discharge" treatment, it is necessary to protect the membrane system to reduce fouling of membrane materials. Sand filter + carbon filter + ultrafiltration pretreatment units are often installed at th...

AI Technical Summary

Problems solved by technology

At present, the advanced treatment of sewage often requires ultra- and microfiltration membrane technology, but the investment cost of this technology is relatively high

For reclaimed water reuse and "zero discharge" treatment, it is necessary to protect the membrane system to reduce fouling of membrane materials. Sand filter + carbon filter + ultrafiltration pretreatment units are often installed at the front end of nanofiltration and reverse osmosis. The process is long, the sand filter and carbon filter are easy to harden and difficult to clean, and the ultrafiltration membrane is easy to be fouled, which directly leads to a series of practical problems such as the failure of the subsequent nanofiltration and reverse osmosis treatment units.

[0003] CNTs is the abbreviation of carbon nanotubes (English name Carbon Nanotubes), which can be divided into single-walled carbon nanotubes (SWCNTs) and multi-walled carbon nanotubes (Multi-walled Carbonnanotubes, MWCNTs). The tube formed by curling around the central axis according to a certain helicity has many abnormal mechanical, electrical and magnetic properties, and is widely used in many fields such as nanoelectronic devices, field emission, scanning probe microscopy and chemical sensors. In recent years, although the adsorption, removal, sterilization, and catalytic effects of CNTs materials have certain advantages in the application of environmental treatment, their removal efficiency is not high, and the types of pollutants to be treated are limited; therefore, it is urgent to develop a A composite filter material with high efficiency and wide range of applications

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