With the rapid development of urban

With the rapid development of urbanization, a large number of township enterprises and industrial facilities have been established in rural areas, but most of them lack of scientific and reasonable planning and management. Due to the small scale of production, extensive management, lack of funds to purchase advanced production equipment and other reasons, a large number of industrial three wastes (waste water, waste gas, waste residue) have been produced, while the general lack of management personnel The awareness of environmental protection only pays attention to short-term economic benefits. Enterprises do not have corresponding environmental protection facilities and supporting pollution treatment equipment, and unethical pollution discharge is widespread. At the same time, with the development of urbanization, more and more people are transferred to urban life. Most cities and towns have no perfect sewage treatment system. There are obvious defects in the collection of sewage. A large number of domestic sewage and industrial waste water are discharged into rivers, lakes and oceans without treatment, which seriously pollutes the local water quality, farmland, soil and destroys the ecological balance.