Microbial filtering membrane for treating high-ammonia-nitrogen sewage and preparation method of microbial filtering membrane

Abstract

The invention discloses a microbial filtering membrane for treating high-ammonia-nitrogen sewage and a preparation method of the microbial filtering membrane. The microorganism filtering membrane is prepared from the following raw materials in parts by weight: 18-22 parts of multi-layer bacterium fixing capsules, 25-30 parts of sodium alginate and 50-60 parts of acrylamide. The invention has the beneficial effects that (1) cyanobacteria and nitrifying bacteria are combined as microorganisms, so recyclable oxygen supply is formed, and high-ammonia-nitrogen sewage is synergistically removed; (2) microorganisms are packaged to prepare the multi-layer bacterium fixing capsule, so biological pollution is effectively inhibited, the activity of the microorganisms in high-concentration sewage is ensured, and the recycling rate is increased; (3) by utilizing the shell of the multi-layer bacterium immobilizing capsule, the microorganism filtering membrane forms a calcium ion crosslinking and polyacrylamide interpenetrating network taking the microorganism filtering membrane as a winding point, so that the mechanical strength and the water flux are effectively enhanced.

Description

technical field [0001] The invention relates to the technical field of filter membranes, in particular to a microbial filter membrane for treating high-ammonia-nitrogen sewage and a preparation method thereof. Background technique [0002] The microbial filtration membrane used for sewage treatment can utilize the microorganisms enriched on the membrane layer to absorb and metabolize the chemical components in sewage, and has a good purification effect on sewage treatment. However, the commonly used microbial filtration membranes generally have no filtering effect on water quality; on the one hand, the way of enrichment of the membrane layer has poor immobilization effect on microorganisms, which tends to make the microorganisms appear free in the sewage, while the high concentration of ammonia nitrogen can inhibit the activity of microorganisms effect, thereby reducing the removal rate of ammonia nitrogen; on the other hand, the treatment process is likely to cause microbia...

AI Technical Summary

Problems solved by technology

However, the commonly used microbial filtration membranes generally have no filtering effect on water quality; on the one hand, the way of enrichment of the membrane layer has poor immobilization effect on microorganisms, which tends to make the microorganisms appear free in the sewage, while the high concentration of ammonia nitrogen can inhibit the activity of microorganisms effect, thereby reducing the removal rate of ammonia nitrogen; on the other hand, the treatment process is likely to cause microbial contamination, making the microbial filtration membrane reusable.

[0003] In addition, the common microorganisms that deal with ammonia nitrogen include nitrifying bacteria, which need oxygen in the process of nitrifying ammonia nitrogen, and generally oxygenate through aeration, which consumes a lot of oxygen mechanically.

The photosynthesis of cyanobacteria can produce oxygen, supply nitrifying cells, reduce oxygen consumption, and reduce costs, but light has an inhibitory effect on the activity of nitrifying bacteria