Enhanced denitrification sewage treatment process coupled with sludge resourceful treatment

Abstract

The invention discloses an enhanced denitrification sewage treatment process coupled with sludge resourceful treatment, which comprises the following steps: introducing sewage in an adjusting tank into an aeration adsorption tank for adsorption reaction; then introducing outlet water in the aeration adsorption tank into a primary sedimentation tank for sedimentation, enabling part of sludge in the primary sedimentation tank to flow back into the aeration adsorption tank, and directly discharging residual sludge into a pyrohydrolysis tank for pyrohydrolysis; introducing the effluent of the primary sedimentation tank into an aeration biological tank for biochemical reaction; feeding the effluent in the biological aerated tank into a secondary precipitation and denitrification filter tank for synchronous precipitation and denitrification, wherein the pyrohydrolysis sludge serves as a carbon source for denitrification, feeding a part of the sludge in the secondary precipitation and denitrification filter tank back to the biological aerated tank, and discharging the rest of the sludge into a sludge tank. The sewage treatment process disclosed by the invention has the advantages of high impact load resistance, high denitrification efficiency, high organic matter recycling rate, economy, energy conservation, low operation cost, simple and feasible treatment process and good treatment effect.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to an enhanced denitrification sewage treatment process coupled with sludge resource treatment. Background technique [0002] With the development of urban construction and the improvement of living standards, there are more and more domestic sewage and industrial wastewater, and various sewage treatment facilities are becoming more and more complete. However, sludge, as a product of sewage treatment, has brought serious harm to the environment. . [0003] At present, biological denitrification, namely nitrification and denitrification, is widely used in sewage treatment plants. Among them, denitrification requires organic carbon as an essential substance and energy source for bacterial metabolism, so sufficient carbon sources are required for denitrification. The carbon source in the sewage water quality is relatively scarce, and the efficiency of the existing process tec...

AI Technical Summary

Problems solved by technology

The carbon source in the sewage water quality is relatively scarce, and the efficiency of the existing process technology for the utilization of the carbon source is also low. At present, sewage treatment plants usually add external carbon sources in the denitrification process to improve denitrification efficiency. Commonly used carbon sources include methanol, sodium acetate, acetic acid, etc. The use of these external carbon sources greatly increases sewage treatment. cost

[0004] In the prior art, there have been process routes for sludge resource utilization, but there are few designs coupled with sewage treatment processes, and there are disadvantages such as complex processes, low utilization rate of organic carbon sources, and unsatisfactory treatment effects.

Therefore, it is necessary to develop a sewage treatment process with good treatment effect, strong impact load resistance, economy and energy saving, low operating cost, simple and easy treatment process, and convenient maintenance and management, so as to solve the current problems of large changes in water quality and quantity, low C Difficult problems in domestic sewage treatment and sludge disposal with / N ratio

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