A. 滤布3927是什么
3 927滤布是常用的工业用布型号，该滤布产品采用涤纶短纤织造。产品耐酸，耐弱碱，正常使用温度<130℃。3927滤布的织法为平纹，每平方克重达到500g以上，属于加密型滤布，适用于较高精度要求的过滤用途。
产品具体参数如下：
断裂强度 经纬密度 厚度 重量 透气度 织物组织
(N/5*20cm) （根/10cm） （mm） （g/m2） L/m2.s
4598/3154 156/106 0.9 524 18 平纹
参考资料：http://ke..com/view/2583843.htm
B. 摘要翻译 中译英 追加积分~~~
Dynamic membrane bioreactor is a traditional membrane bioreactor and dynamic combination of membrane technology the new sewage treatment technology, has many advantages, for China's national conditions. The research technology for municipal wastewater treatment to provide a highly efficient economic, practical and feasible means to resolve the problem of great significance. Help to understand the adoption of this experiment under the conditions of stable operation of different instrial filter cloth as a self-dynamic membrane bio-reactor, the substrate film, the dynamic membrane bioreactor for the removal effect of pollutants.
This experiment is to ensure the stability of water quality, aeration amount of stability, the stability of water flow on the different types of instrial 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 e 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, ring 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.