Novel town sewerage mixed treatment process

Abstract

The invention discloses a novel process for mixing treatment of urban sewage. The process comprises the steps of collection, acidification treatment, anaerobic digestion treatment and facultative treatment of domestic sewage and aquiculture sewage after solid-liquid separation, as well as the construction of ecological circulation systems such as vegetable greenhouses and orchards; moreover, the process can effectively remove organics such as COD and BOD and heavy metals such as Cu<2+>, Pb<2+>and Zn<2+> in the sewage, and completely eliminates eutrophic ingredients in water so as to ensure that the sewage can meet the discharge standard. The novel process has the advantages of outstanding decontamination effect, energy conservation and consumption reduction, less investment, low operating cost, convenient and reliable operation, wide application range, no season limitation on operation and less land occupation; moreover, the novel process can be used for ecological treatment and comprehensive recycling of urban sewage, and can also be used specifically for the treatment of aquiculture wastewater in large-sized poultry and livestock farms.

Description

technical field [0001] The invention relates to a sewage treatment process, in particular to a new ecological cycle process for mixed treatment of domestic and aquaculture sewage in market towns. Background technique [0002] With the continuous improvement of my country's urbanization level, the number of small towns in the country has reached nearly 50,000. The domestic sewage and sewage produced by poultry farming in these small towns are directly discharged without purification treatment. The sewage enters rivers and lakes through surface runoff, resulting in Nitrogen, phosphorus, sulfur, carbon, etc. are seriously exceeded, resulting in eutrophication of water bodies, and these wastewaters contain a large number of bacteria and germs, causing serious pollution of the water environment, seriously affecting the ecological environment, and directly endangering people's health. At present, the domestic treatment of this kind of wastewater adopts biological methods, that is, ...

AI Technical Summary

Problems solved by technology

[0002] With the continuous improvement of my country's urbanization level, there are nearly 50,000 small towns across the country. The domestic sewage and sewage produced by poultry farming in these small towns are directly discharged without purification treatment. The sewage enters rivers and lakes through surface runoff, causing water pollution. Nitrogen, phosphorus, sulfur, carbon, etc. seriously exceed the standard, resulting in eutrophication of the water body, and these wastewaters contain a large number of bacteria and germs, causing serious pollution of the water environment, seriously affecting the ecological environment, and directly endangering people's health

At present, the domestic treatment of this kind of wastewater adopts biological methods, that is, aerobic, anaerobic, and facultative oxygen treatment systems. Although this treatment system has the characteristics of high processing load and strong processing capacity, the disadvantage is that it is a one-time investment. The second is to adopt the artificial wetland system, that is, to transform abandoned or idle farmland, depressions, ponds, etc.

This system has the characteristics of low investment, low operating cost, and simple maintenance technology, but it occupies a large area and is limited in winter operation.