Flat membrane rapid suspension method by using embedded microbe gel and special coating apparatus

Abstract

The invention relates to a flat membrane rapid suspension method by using an embedded microbe gel and a special coating apparatus. The method comprises the following steps: polyvinyl alcohol and a sodium alginate hydrogel material are mixed with water, a mixture is fully dissolved and uniformly mixed in a water-bath pan at the temperature of 90 DEG C, the mixture is cooled to room temperature, activated sludge is added and uniformly mixed to prepare gel liquid; the surface of a flat membrane is coated with gel liquid by using the special coating apparatus, the flat membrane coated with the gelis pre-refrigerated and solidified for 1 h at low temperature of 4 DEG C so that a gel form is stable, the flat membrane is placed in crosslinking liquid and is subjected to a chemical fixed crosslinking reaction for 12 h, the flat membrane is taken out, and the superfluous crosslinking liquid is washed with water. The microbe-embedded gel material is loaded to the surface of a traditional aeration membrane to form a composite film aeration biomembrane, so that a gel layer having microbe activity is rapidly formed at the surface of the aeration membrane, and optimum sewage processing effect can be achieved through reasonable control of biomembrane thickness and embedding sequences of different microbes.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a method and a special coating device for fast film hanging of a flat film embedded with microbial gel. The invention combines traditional membrane aeration biofilm and microorganism immobilization technology, and is used for biological treatment of sewage. Background technique [0002] Microbial embedding technology is a kind of microbial immobilization technology. It uses physical and chemical means to confine or locate intact cells in a certain space area and keep them with a certain biocatalytic activity. It is currently the most widely used immobilization technology. The specific method is to make gel-like solid particles by cross-linking specific microorganisms and embedding agents. The embedding agents are generally high molecular polymers. Commonly used materials are polyvinyl alcohol (PVA), sodium alginate (SA) ), polyethylene glycol (PEG), polyurethane (PU) and polyacry...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the deficiencies in the prior art, synthesize a kind of membrane aerated biofilm that loads the gel that embeds microorganisms, and loads a layer of gel that embeds microorganisms on the surface of a conventional PVDF flat membrane, shortening the hanging time. The film time solves the problems of long time for aerated biofilm, difficulty in film formation, and inability to quantitatively control the biothickness.

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