In-situ upgrading reconstruction method for CASS pool

Abstract

The invention discloses an in-situ upgrading reconstruction method for a CASS pool. The in-situ upgrading reconstruction method comprises the following steps: reconstructing a pretreatment pool of theCASS pool into an anaerobic pool; dismantling an original structure in a main reaction tank of the CASS pool, arranging a partition wall in the main reaction tank to make the main reaction tank isolated and reconstructed into a denitrification tank and a biochemical sedimentation tank through the partition wall, installing a circulation clarifier in the biochemical sedimentation tank, installingan aeration disc below a sewage return opening of the circulation clarifier, forming a backflow channel in one side in the biochemical sedimentation tank, mounting a first reflux pump at the position,close to the denitrification tank, of a reflux channel to make sludge in the reflux channel guided into a denitrification tank, and arranging a water distribution channel on the other side in the biochemical sedimentation tank. The water distribution channel and the reflux channel are oppositely arranged, so that the water distribution channel communicates with the denitrification tank and the biochemical sedimentation tank and is used for guiding denitrification sewage in the denitrification tank into the biochemical sedimentation tank. Namely, according to the technical scheme, on the premise that the occupied area is not additionally increased, it is guaranteed that the total nitrogen content of the effluent reaches the emission standard smaller than 15 mg / L.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a method for upgrading and transforming a CASS pool in situ. Background technique [0002] At this stage, the development of social economy, science and technology, and culture has brought about great changes in people's production and lifestyle, and the types and quantities of pollutants in urban sewage have also increased sharply. Coupled with people's deepening concept of environmental protection, Promoting the standard upgrading of sewage treatment plants to achieve better sewage treatment effects has become the focus of widespread concern in the society. In order to meet stricter discharge standards, China's urban sewage treatment plants are undergoing a new round of upgrades. [0003] However, the organic components of sewage are very complex, especially the high content of pollutants such as ammonia nitrogen and total nitrogen. To meet higher discharge standards,...

AI Technical Summary

Problems solved by technology

[0003] However, the organic components of sewage are very complex, especially the high content of pollutants such as ammonia nitrogen and total nitrogen. To meet higher discharge standards, the current conventional transformation method adds an advanced treatment unit at the end of the CASS tank, such as biological aerated filter. , denitrification deep bed filter, etc., so as to further reduce the total nitrogen content of the effluent

However, the addition of advanced processing units will undoubtedly increase the footprint

Images