Views: 9 Author: Site Editor Publish Time: 2020-02-15 Origin: Site
The completion acceptance of the third phase of domestic sewage treatment project is completed. The sewage treatment facilities of the project are Nanomemflat ceramic membrane PC-MBR integrated sewage treatment equipment, and the treatment capacity of single equipment is about 300-500 tons / day. The whole equipment is buried and the ground is afforested, which greatly saves the land area. The first and second phases of domestic sewage treatment equipment of the project have been operated for two years, and the effluent quality is up to the national discharge standard. The equipment operates stably and the operation cost is low.
The flat ceramic membrane waste water treatment equipment adopts the flat ceramic membrane bioreactor (PC-MBR) technology. Unlike the traditional MBR, the inorganic flat ceramic membrane replaces the organic polymer composite membrane. Because the inorganic ceramic membrane is acid and alkali resistant (can withstand pH 2-8), corrosion-resistant, high temperature resistant, easy to clean and long service life, it is especially suitable for the integrated membrane bioreactor with compact equipment. It is a new choice of MBR technology because of its low energy consumption.
MBR technology has been introduced into China since the end of 1990s. In the past two decades, it has made great progress in China, and also achieved the rise of a number of organic membrane manufacturing and application enterprises.
MBR technology is an effective combination of traditional biological treatment technology and membrane separation technology. In the traditional wastewater biological treatment technology, sludge water separation is completed by gravity in the secondary sedimentation tank, and its separation efficiency depends on the sedimentation performance of activated sludge. The better the sedimentation, the higher the sludge water separation efficiency. However, the settling ability of sludge depends on the operation condition of aeration tank. For improving the settling ability of sludge, the operation condition of aeration tank must be strictly controlled, which limits the application scope of this method. Due to the requirement of solid-liquid separation in the secondary sedimentation tank, the sludge in the aeration tank can not maintain a high concentration, so there is a contradiction between increasing the volume load and reducing the sludge load. A large amount of excess sludge is also produced in the operation of the system. The traditional activated sludge treatment system is also prone to sludge bulking, the effluent contains suspended solids, and the effluent quality is deteriorated. In view of the above problems, MBR organically combines the membrane separation technology in separation engineering with the traditional wastewater biological treatment technology, which greatly improves the solid-liquid separation efficiency; moreover, due to the increase of activated sludge concentration in the aeration tank and the emergence of specific bacteria (especially the dominant bacteria) in the sludge, it improves the biochemical reaction rate; at the same time, it reduces the amount of excess sludge by reducing the F / M ratio.
Under China's increasingly strict environmental protection policy, MBR Membrane Biotechnology has become an important guarantee for sewage discharge.
At present, the organic membrane MBR is mainly used in municipal wastewater treatment in China. It is very easy to be corroded in the wastewater with complex pollution components because the organic membrane is a polymer synthetic material with poor acid and alkali resistance, so it is difficult to open the industrial wastewater market. With the birth of flat ceramic membrane, MBR membrane bioreactor technology can be widely used in municipal wastewater and various industrial wastewater fields. Compared with organic membrane, flat ceramic membrane has larger flux, easier cleaning, less blockage and long service life.The flat ceramic membrane has more advantages and lower operation and maintenance costs. In industrial waste water field, it has superior acid and alkali resistance and pollution resistance There is no doubt that the characteristics of dyeing have obvious advantages, and there is a huge space for the future development of MBR plate ceramic membrane technology.
The PC-MBR flat ceramic membrane integrated sewage treatment equipment can be applied to projects that a daily treatment capacity is less than 500 tons, and it is suitable for the decentralized sewage treatment in rural villages, and the minor enterprises.