Self-aerated biological runner and small-town wastewater treatment equipment and process

Abstract

The invention discloses a self-aerated biological runner and small-town wastewater treatment equipment and process. A fiber bundle bionic filler screen is hung in the cavity of the self-aerated biological runner in an overlapping way; two ends of the fiber bundle bionic filler screen are hung on two adjacent runners respectively; the self-aerated biological runner has high aeration efficiency; aeration equipment in the sewage treatment equipment is used for aerating by using the self-aerated biological runner; an up-flow honeycomb duct is adopted for stirring instead of a stirrer; mud-water separation is performed with a three-phase separator and a tilted plate separator. In the wastewater treatment process, a biological contact oxidizing process combining an active sludge method and a biological membrane method is adopted, a gas stripping technology is adopted for sewage reflow in order to omit an inner circulation pump, and a three-phase separation technology and inclined plate settlement are adopted for mud-water separation. The process is simple, is safe, is easy to operate, and has high treatment efficiency.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a small town sewage treatment equipment and process. Background technique [0002] With the acceleration of urbanization in our country, many towns have imperfect infrastructure and sewage pollutes the environment seriously. There are more than 600,000 administrative villages and more than 2.5 million natural villages in China. Rural economic development is rapid and living standards are high. However, rural environmental construction is not in sync with economic development, and rural water environment pollution is serious. The phenomenon of "dirty mess" in rural areas and small towns poses a threat to the health of the population. Sewage treatment in villages and towns is one of the key points in the construction of new countryside and the creation of ecologically civilized cities and towns. Rural and small town sewage is mainly domestic sewage, which has good biochemical prop...

AI Technical Summary

Problems solved by technology

[0003] However, small town sewage has limited water volume, difficulty in collection, large fluctuations in water quality and volume, less construction land, and lack of professional maintenance personnel management, which makes the existing sewage treatment process for small towns have the following problems:

[0004] (1) Copying the process of urban sewage treatment plants, the treatment process is complex, the project has a large one-time investment, a large area, and a long construction period

[0005] (2) The water quality and quantity of township sewage fluctuate greatly, and the system has poor impact load resistance. The existing process often adopts a single biochemical method (activated sludge method or biofilm method), and the sewage treatment capacity of a single biochemical method has limitations. The dephosphorization effect of the mud method is better but the denitrification effect is poor, and the denitrification effect of the biofilm method is better but the dephosphorization effect is poor

[0006] (3) Blower aeration is often used in the existing process. Due to the small amount of water to be treated and the small pool volume, the number of perforated aeration tubes or microporous aeration heads used is small, and only a small part of the aeration equipment is blocked and damaged. It has a significant impact on the aeration volume and aeration uniformity of the whole system, making the effluent water quality difficult to stabilize

[0007] (4) There are many equipments operating underwater, resulting in inconvenient operation and management, high professional technical requirements for operators, and problems that cannot be solved in time

[0008] (5) For sewage treatment plants with particularly small water volumes, it is very difficult to select suitable models for equipment such as pumps and agitators, and it is often difficult to achieve energy saving and environmental protection

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