Engineering Design Of Domestic Sewage Treatment

Sewage discharge has brought about a serious environmental pollution. Big city mainly focus on large-scale construction of the sewage treatment plant for processing, the scattered point system is processed locally to resolve. In addition, increasing emphasis on the use of recycled water, so, we can turn living sewage to clean water for pouring grass, cleaning, construction, and landscape and so on. So we can save a lot of water and groundwater. The topic is to study living sewage. The core craft mainly adopts membrane biological treatment technology. Membranebio-reactor(MBR) is a treatment equipment which has rapid development, membranebio-reactor(MBR) technology have many advantages, which are not possessed by traditional methods, for example: cover little, less energy-consuming etc, but MBR also exist certain weakness, membrane pollution is main factor to influence its appliance of expansion. At present, domestic and foreign scholars generally are to research membrane pollution as a starting point. Such as, by changing the nature of materials, optimization of operating parameters, improving the efficiency of membrane cleaning methods to control membrane pollution. Membrane bioreactor technology will have a very good application prospect. Comparing with the traditional methods, long sludge retain time is good for the wiping of contamination, the wipe off ratio of COD exceeded 90%; the wipe off ratio of NH₃-N exceeded 95%;the wipe off ratio of turbid degree exceeded 90% and the turbid degree of the equip was less than 1 NUT. Effluent water is colorless and odorless .We can believe membrane bioreactor technology will have a very good application prospect.