摘要翻譯 中譯英 追加積分~~~
This experiment is to ensure the stability of water quality, aeration amount of stability, the stability of water flow on the different types of industrial filter cloth as a substrate for dynamic membrane filtration pilot study comparing the performance. At MLSS = 6000-7000mg / L, influent flow 4.0-5.0L / h, test results show that:
(1) the initial membrane flux: on the 1st and the 2nd filter cloth filter cloth larger than the initial membrane flux, but on the 2nd filter membrane flux after backwashing poor before backwashing is only 69%, 3 filter the smallest initial flux, but membrane flux after backwashing to achieve 95% of the original, the cloth on the 4th as a result of the largest aperture, the initial membrane flux was also the largest flux after backwashing is only 72% of the original, filter cloth 5, because as a result of the larger aperture, the initial membrane flux is also smaller, but after cleaning flux can reach 81% of the original.
(2) water quality: All of the five filter cloth has a good COD removal rate, 1, 2, 3, of the analog filter wastewater ammonia nitrogen, total nitrogen removal efficiency is also good, but on the 4th filter due to the larger aperture, which nitrifying bacteria into the water, resulting in its wastewater ammonia nitrogen, total nitrogen removal efficiency of the poor, cloth on the 5th of ammonia nitrogen, total nitrogen removal rate is not high.
(3) dynamic membrane: 1, filter cloth, over time, the dynamics of the formation of a uniform film, 2, and 3, there is no dynamic filter surface membrane, filter cloth 4, the formation of a thick surface layer of the dynamic membrane, 5, filter cloth surface is also formed a uniform layer of dynamic membrane.
Taking all these factors and found that on the 2nd filter (621,400 head) and 3 (621 encryption, 800-mesh) filter has a lot of defects, the surface of the filter there is no dynamic membrane, on the 4th filter (750B, 350 mesh) on the simulation of ammonia nitrogen in wastewater, the removal efficiency of total nitrogen is not ideal, on the 5th filter (295-1,800 heads) of smaller diameter, shorter cycles, frequent backwashing and its simulated wastewater to In addition to the effect of not ideal, and the filter cloth on the 1st (3927,600 head) Although it takes a period of time to form a dynamic membrane, during the treatment is not ideal, but after the formation of dynamic membrane, the simulated wastewater to have a stable and satisfactory removal effect, so that the filter cloth on the 1st (3927,600 head) is more ideal filtering performance, choose the best membrane for the substrate.