Fibrous membrane for aeration and alga type micro-nano aeration biological membrane component for in situ river control

Abstract

The invention discloses a fibrous membrane for aeration. The two ends of the fibrous membrane for aeration are arranged as a packaging end and an opening end. The manufacturing for the packaging end comprises the following steps: inserting one end of a hollow fibrous membrane into a solution of polyvinylidene fluoride and dimethylacetamide and then reacting in distilled water. The invention also discloses an alga type micro-nano aeration biological membrane component for in situ river control. The alga type micro-nano aeration biological membrane component comprises an aeration membrane unit, a biological membrane carrier and an end socket, wherein the aeration membrane unit comprises a packaging sleeve and a fibrous membrane beam composed of a plurality of fibrous membranes for aeration and fixed on the packaging sleeve; the aeration membrane unit is fixedly arranged on the end socket through the packaging sleeve; a vent hole which runs through the end socket is formed in the end socket; the biological membrane carrier is of bar shape and is fixed on the end socket. The fibrous membrane for aeration is capable of generating a large quantity of air bubbles at constant rate under lower air supply pressure, wherein the diameters of the air bubbles are within 60nm-200mum; the fibrous membrane for aeration has ultrahigh specific area; the fibrous membrane for aeration is capable of effectively increasing the contact surface area of water and air bubbles and increasing the oxygen mass transfer efficiency of aeration.

Description

technical field [0001] The invention relates to a micro-nano aerated biofilm assembly in the field of water environment treatment, in particular to a composite assembly of a seaweed-type micro-nano aeration unit and a biofilm filler. Background technique [0002] At present, water pollution has become the most important water environment problem facing our country. Due to the continuous increase of nitrogen, phosphorus and other nutrients discharged into rivers and lakes, the process of eutrophication of water body is accelerated. In addition, with the acceleration of urban sewage treatment and reclaimed water reuse, reclaimed water has become an important part of urban rivers and lakes. The COD of these water bodies is not high, but the content of ammonia nitrogen is relatively high. This situation further aggravates the The degree of eutrophication of the lake. The eutrophication of rivers and lakes leads to frequent outbreaks of cyanobacteria blooms, causing a large numb...

AI Technical Summary

Problems solved by technology

The eutrophication of rivers and lakes leads to frequent outbreaks of cyanobacteria blooms, causing a large number of aquatic organisms such as fish to die. After the death of algae, the decomposition of microorganisms consumes a large amount of dissolved oxygen in the water, and a large amount of algae toxins are released, resulting in damage to the function of the water body. Seriously affect the production and life of residents

[0003] At present, the technologies for in-situ restoration of water bodies can be summarized as aeration and reoxygenation methods, ecological floating bed methods, microbial methods, etc. Among them, aeration and reoxygenation methods can only increase dissolved oxygen in water bodies, and have no significant effect on removing pollutants such as nitrogen and phosphorus. The ecological floating bed method mainly utilizes the root absorption of wet crops to achieve the purpose of removing nutrients in the water body, but the plant purification has problems such as low efficiency in winter, and nutrients and organic matter enter the water body again after the plants wither; the microbial method has nitrification, The number of denitrifying bacteria is small and the microbial activity is low. The engineering bacteria method has poor adaptability of the bacteria and it is difficult to maintain a good water quality for a long time.

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