Reconstruction method for upgrading and capacity expansion of sewage treatment system

Abstract

The invention provides a reconstruction method for upgrading and capacity expansion of a sewage treatment system. The method is based on a sewage treatment plant original process of: water inflow, coarse grid, fine grid, grit basin, membrane grid, biological tank, sedimentation tank, disinfection tank and water outflow, performs reconstruction on a structure of the original process, transforms the structure of the biological tank, and reforms the sedimentation tank into a membrane tank, enables reasonable structure layout, improves the sewage treatment scale from the original 10 thousand tons / day to 20 thousand tons / day, at the same time improves the outflow water quality from the grade II standard of original "municipal sewage treatment plant pollution discharge standards" to IV standard of surface water (except TN), and simultaneously in the reconstruction process, the method ensures normal operation of the overall sewage treatment plant, and avoids loss brought about in the reconstruction period.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a transformation method for improving the standard and expanding the capacity of a sewage treatment system. Background technique [0002] The problem of water resources is a major problem in today's society. It seriously affects the environment and restricts the sustainable development of economy and society. Especially at the current stage, a large amount of sewage is discharged outside, causing a greater burden on the sewage treatment work of the sewage treatment plant, and urgently needs to be improved to meet the greater demand. [0003] With the continuous improvement of sewage treatment technology, in order to meet the increasingly stringent sewage discharge requirements and further improve the treatment efficiency of urban sewage treatment plants, many sewage treatment plants that have been built are in urgent need of technical upgrading, and various u...

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Problems solved by technology

In many improvement projects, due to the early construction of many sewage treatment plants, with the development of the city, the amount of sewage in the service area has increased, and there is no land around for expansion; when the expansion is carried out, the sewage plants need to be relocated to New construction in remote areas outside the city; or during renovation, the original structures need to be demolished and new structures built to meet the improved sewage treatment needs; this not only requires a large amount of engineering, high investment, and high operating costs, but also affects the current situation Due to the operation of the sewage plant, there is direct discharge of untreated sewage during the transformation period

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