Biochemical pool MBBR process and denitrification deep-bed filter tank coupled nitrogen and phosphorus removal system and method thereof

Abstract

The invention relates to a biochemical pool MBBR process and denitrification deep-bed filter tank coupled nitrogen and phosphorus removal system and a method thereof. The system comprises a biochemical pool and a secondary sedimentation tank. The biochemical pool is divided into at least two chambers. In the chamber close to the outlet are arranged several suspended fillers. The denitrification deep-bed filter tank is located downstream the secondary sedimentation tank. The denitrification deep-bed filter tank comprises a flocculation basin, inside which a stirring mechanism is arranged and the top of which is provided with a carbon source dosing mechanism and a flocculating agent dosing mechanism. A water inlet main canal is connected downstream, and an intake gate is arranged in the water inlet main canal. A filter grid is arranged downstream. An intake canal is connected under the filter grid. A filter tank is arranged under the intake canal. Inside the filter tank, a filter layer,a supporting layer, a filter board and a filter head disposed on the filter board are successively arranged from top to bottom. The denitrification deep-bed filter tank also comprises a backwashing fan and a backwashing water pump. The outlet of the backwashing fan extends through a pipeline to the supporting layer, and the outlet of the backwashing water pump extends through a pipeline into the filter tank below the filter board. The pipelines are all provided with a control valve. The system of the invention can perform denitrification and physical interception to remove phosphorus.

Description

technical field [0001] The invention relates to a biochemical pool MBBR process coupled denitrification deep-bed filter tank denitrification and phosphorus removal system and method, belonging to the technical field of sewage treatment. Background technique [0002] According to the "Water Pollution Prevention and Control Action Plan" - Water Ten Articles, the existing urban sewage treatment facilities should be transformed according to local conditions, and the corresponding discharge standards or recycling requirements should be met by the end of 2020. Urban sewage treatment facilities in sensitive areas (key lakes, key reservoirs, and coastal water catchment areas) should fully meet the Class A discharge standard by the end of 2017. For cities where the water quality in the built-up area does not meet the Class IV standard for surface water, the new urban sewage treatment facilities must implement Class A discharge standards. At present, most sewage treatment plants in m...

AI Technical Summary

Problems solved by technology

Both of these methods involve adding suspended fillers in the secondary treatment, and then continue to filter the treatment, but the two methods only add suspended fillers for A2O or AO pools, and do not extend the use of suspended fillers to other types of biochemical In the pool, such as oxidation ditch, Baileke, etc.

In addition, the filter cloth filter was adopted in the follow-up, which only intercepted suspended solids, and did not consider the setting of multiple functions for removing total nitrogen and total phosphorus. If the operation of the front-end secondary treatment is unstable or there are further requirements for effluent water quality, it will not be able to Meet the design requirements

Images