Sewage enhanced treatment system and method

Abstract

The invention discloses a sewage enhanced treatment system and method, and relates to the technical field of sewage treatment. The sewage enhanced treatment system comprises a grid, a primary sedimentation tank, a biochemical aeration tank, a secondary sedimentation tank, a sludge concentration device and a sludge dehydration device which are communicated in sequence and is characterized by further comprising a sludge culture tank, and the sludge culture tank comprises an aeration device, a perforated plate, a sludge inlet pipe, a sludge discharge pipe, a humus soil filler layer, a pumice filler layer and water pumps. The sewage enhanced treatment system substantially improves the treatment effect and greatly reduces the content of COD, total nitrogen, total phosphorus and heavy metal in sewage; no chemical conditioning agent exists, chemical residuals are avoided, and water quality safety is improved; the treatment process is odourless basically, and air pollution is effectively avoided, which is beneficial for development of a friendly society; the sewage enhanced treatment system is low in investment and running cost, easy to operate, apply and popularize and particularly suitable for small and medium-sized enterprises.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a system and method for enhanced sewage treatment. Background technique [0002] The shortage of water resources is a common problem faced by many cities in our country. With the rapid development of our country's economy, the pace of industrialization and urbanization is accelerating, and the discharge of urban sewage is increasing day by day. A large part of the sewage is directly discharged into the water body without treatment. Many water systems in my country have been polluted, especially drinking water sources, which have exacerbated the contradiction between supply and demand of water resources. The rural areas of the country produce more than 9 billion tons of agricultural wastewater every year, and 96% of them have no agricultural wastewater collection and treatment facilities. About 320 million people have water safety hazards, which restricts the sustainable de...

AI Technical Summary

Problems solved by technology

The activated sludge process is currently the most mature and widely used sewage treatment process. However, the traditional activated sludge process and its derivative processes still have some technical problems, such as the increase in the load of the secondary settling tank, the low dissolved oxygen in the sludge, The treatment effect is poor and unstable, especially the effect of nitrogen and phosphorus removal; the sludge output is large, the moisture content is high, the sludge dehydration performance is poor, it is difficult to treat, and a large amount of odor is generated during the treatment process, which causes serious problems to the air, which seriously restricts The promotion and application of the technology

In order to improve and improve the treatment effect, researchers have improved the activated sludge method, such as the invention patent "an improved activated sludge method sewage treatment system" (patent number: ZL 201310150290.3), that is, in the original activated sludge treatment method On the basis, the aeration and return device is added to reuse the sludge return, and at the same time provide sufficient oxygen for the microorganisms to promote the biochemical reaction, thereby improving the treatment effect, but the activity of the returned sludge in this technical scheme is reduced, and the microbial nutrition is not sufficient , affecting the dephosphorization and nitrogen removal effects, and the odor and heavy metals in the sewage have not been well removed, polluting the environment and still posing potential threats to organisms

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