Modified PVC biologic filler

Abstract

The invention discloses a modified PVC biologic filler comprising the following components according to part by weight: 4-6 parts of polyvinyl alcohol, 2-4 parts of polyethylene glycol octyl phenyl ether, 2-4 parts of stearic acid, 0.5-1.5 parts of polyacrylamide, 1-3 parts of active carbon, 4-6 parts of magnetic powders and 66.5-79.5 parts of PVC elastomers. The invention mainly carries out hydrophilic modification, active carbon modification, magnetic modification and toughening modification on the PVC biologic filler, enhances the hydrophilic performance and the flexible performance of thebiologic filler, prolongs the contact time of microorganisms and organic substances and further induces the activity of the microorganisms. The obtained microorganism filler enables the biologic filler to have high film hanging speed and large film hanging quantity, and enable a film and the filler to have sufficient compactness. The obtained biologic filler has better heat resisting performance,difficult aging and strong shock resistance capability.

Description

technical field [0001] The invention belongs to biological fillers, in particular to a modified PVC biological filler for biofilm water treatment in sewage treatment. Background technique [0002] Biofiller is one of the cores of wastewater biological treatment technology. Its material and surface properties will directly affect the attachment and growth of microorganisms, and then affect the treatment effect of wastewater. Currently, the common polyvinyl chloride biofillers on the market have poor hydrophilicity and bio-affinity, which lead to deficiencies in the film-hanging speed, the amount of film-hanging, and the tightness between the film and the filler. Water and biological affinity modification, activated carbon and magnetic modification are expected to improve the mass transfer, film formation and water treatment performance of the filler. In addition, the impact strength of PVC is only 3-5kJ / m2, which has the disadvantages of low impact strength and poor thermal ...

AI Technical Summary

Problems solved by technology

Currently, the common polyvinyl chloride biofillers on the market have poor hydrophilicity and bio-affinity, resulting in insufficient film-hanging speed, film-hanging amount, and tightness between the film and the filler. Water and biological affinity modification, activated carbon and magnetic modification are expected to improve the mass transfer, film formation and water treatment performance of the packing

In addition, the impact strength of PVC is only 3 ~ 5kJ / m2, which has the disadvantages of low impact strength and poor thermal stability, which makes the filler easy to age and has a short service life.

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