Sewage deep treatment method by using oxygenation filter system

Abstract

The invention discloses a sewage deep treatment method by using an oxygenation filter system. The method is implemented by establishing an oxygenation filter system, wherein the oxygenation filter system comprises a sewage deep treatment tank in which a filter layer is arranged. Domestic sewage is sufficiently oxygenated through an oxygenation device, and sent into the sewage deep treatment tank through a water inlet pump; the sewage flowing out of a water distributor passes through the filter layer from bottom to top; a porous sintered ceramic granule filter material with developed pore structure can provide an attachment space for microbial films; the growth of the microbial films can enhance the removal effect on COD (chemical oxygen demand) and ammonia nitrogen in the sewage; as the water flow ascends, the dissolved oxygen content in the sewage gradually decreases, and an anoxic layer is formed on the upper part of the filter layer, thereby implementing the denitrification action and lowering the total nitrogen content in water; and since the filter layer has favorable adsorption and entrapment actions, the (suspended sediment) SS content in the sewage is lowered. The oxygenation filter system is small in occupied area and simple to operate, does not need to clean the filter layer after shutdown, and provides favorable conditions for removing COD, ammonia nitrogen and TN (total nitrogen).

Description

technical field [0001] The invention relates to a sewage treatment method, in particular to a method for advanced sewage treatment by using an oxygenation filter system. Background technique [0002] With the acceleration of urbanization and industrialization in our country, urban sewage treatment plants collect and treat most of the urban domestic sewage, and the discharge of this part is growing rapidly, which puts a lot of pressure on the environment in certain areas. If urban sewage treatment plants are still designed and operated in accordance with the discharge requirements of the first-level B standard of the "Pollutant Discharge Standards for Urban Wastewater Treatment Plants" (GB18918-2002), the nitrogen and phosphorus in them will accumulate in the water body over time, which will cause eutrophication of the water body . [0003] The advanced treatment of sewage is mainly realized by single or combined physical, chemical, physicochemical and biological methods. ...

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Problems solved by technology

[0005] 1. The chemical advanced treatment method requires the addition of chemical agents, which not only increase the operating cost, but may also affect natural water bodies;

[0006] 2. The membrane of the membrane advanced treatment method needs to be replaced, and the replacement cost is high. At the same time, the cleaning solution of the membrane is likely to cause secondary pollution;

[0007] 3. The slow filter and artificial wetland occupy a large area, which is not suitable for the advanced treatment of sewage in some areas with tight land use;

[0008] 4. BAF and other processing methods that require downtime and backwashing are easy to affect the operation effect and have certain technical requirements for the staff

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