At present, China's industrial sewage treatment equipment industry is making rapid progress, the overall development is in a rapid growth period, mainly in the rapid expansion of sewage treatment capacity, sewage treatment rate steadily increased, sewage treatment volume rapid growth and so on. In 2010, the daily capacity of municipal sewage treatment plants reached 102.62 million cubic meters, an increase of 13.4% over the end of 2009, and the municipal sewage treatment rate reached 76.9%. By the end of September 2011, a total of 3077 urban sewage treatment plants have been built in cities and counties, with a capacity of 136 million cubic meters per day.
Membrane bioreactor technology is a new technology which combines biological treatment technology with membrane separation technology in industrial sewage treatment equipment. It replaces the secondary sedimentation tank in the traditional process. It can separate solid and liquid efficiently to get the stable reclaimed water directly used. It can also maintain a high concentration of microbial biomass in the biological pond, with less excess sludge, effectively removing ammonia nitrogen, suspended solids and turbidity of effluent close to zero, bacteria and viruses in effluent are largely removed, energy consumption is low, and the area occupied is small.
The construction of industrial sewage treatment equipment promotes the development of environmental protection industry. By 2020, the rate of urban sewage treatment will be no less than 90%. There is a vast market space for sewage treatment equipment in China. In addition, the state's policy of encouraging the use of reclaimed water will also provide a broad market space for advanced sewage treatment. The severe situation of sewage treatment construction in our country and the low sewage treatment rate in county and town have brought huge investment space for the construction and operation of sewage treatment market.
As China's economy continues to grow, it is bound to exploit and utilize resources, which will create new pressure on the environment and bring about many new environmental problems. However, it is necessary to coordinate the relationship between environment, resources and population, and to provide more practical support from society and investment in new and high technologies, which will pollute the city. The harmless and resource-based treatment of water puts forward new requirements, and objectively expands a new space for the marketization of sewage treatment.