Anoxic oxic (AO)<2> and sediment integrated multistage circulating reactor

Abstract

The invention relates to the technical field of sewage treatment equipment, in particular to an anoxic oxic (AO)<2> and sediment integrated multistage circulating reactor. The (AO)<2> and sediment integrated multistage circulating reactor comprises a shell, a sewage inlet pipe and a lifting device; an anoxic area, a first oxic area, a facultative area, a second oxic area and a sediment area whichare connected cyclically are isolated in the shell through partition plates, the anoxic area is located on the lower middle part of the shell, the first oxic area, the facultative area, the second oxic area and the sediment area are sequentially arranged on the upper part of the shell from inside to outside, sewage sequentially flows in the first oxic area, the facultative area, the second oxic area, the sediment area and the anoxic area in an unpowered mode through the water level difference, clear water in the sediment area overflows from the outer side of the upper part of the sediment area, and parts of sludge in the sediment area is discharged from a sludge discharging pipe; the sewage inlet pipe provides the sewage to the anoxic area and the facultative area according to the proportion; and the lifting device is used for lifting the sewage in the anoxic area to the first oxic area. The (AO)<2> and sediment integrated multistage circulating reactor is small in floor space and small in investment.

Description

technical field [0001] The invention relates to the technical field of sewage treatment equipment, in particular to an (AO) 2 --Precipitation integrated multi-stage circulation reactor. Background technique [0002] A / O method: A / O is the abbreviation of Anoxic / Oxic, A is Anoxic, refers to the anoxic area, O is Oxic, refers to the aerobic area, (AO) 2 It represents anoxic and aerobic cycles, and it is a treatment method that degrades organic pollutants and has the function of denitrification and phosphorus removal. [0003] Since the A / O process was developed, it has received more and more attention because of its unique economic and technological advantages and environmental benefits. The A / O process connects the front anoxic section and the rear aerobic section in series. In the anoxic section, heterotrophic bacteria hydrolyze suspended pollutants such as starch, fiber, carbohydrates and soluble organic matter in sewage into organic acids, decompose macromolecular organi...

AI Technical Summary

Problems solved by technology

[0004] The multi-stage A / O process has the characteristics of simple pretreatment and sludge treatment, good and stable effect, low investment, high efficiency of aeration system, easy maintenance and management, etc. It is suitable for small and medium scale, low groundwater level, and soil conditions are suitable for soil However, it is also found in the design that there are certain limitations. For example, the original sewage tank, anaerobic area, aerobic area and sedimentation area are generally arranged in sequence from front to back, and most of the treatment areas Need to use electric pumps to transport sewage or sludge, which requires a large area and large investment

[0005] Rural sewage has the characteristics of small amount of sewage, a large amount of organic matter and inorganic salts such as nitrogen and phosphorus in the sewage, the water quality is very unstable, and the water volume changes greatly day and night. The current multi-stage A / O sewage treatment system is used to treat rural sewage , there are problems of large area and large investment costs

Images