Sewage treatment system capable of improving concentration of activated sludge, and technology of sewage treatment system

Abstract

The invention provides a sewage treatment system capable of improving concentration of activated sludge, and a technology of the sewage treatment system, and relates to the technical field of sewage treatment. The sewage treatment system and the technology aim at solving the problems that the existing sewage treatment technology is low in solid-liquid separation efficiency and poor in sludge thickening effect, microorganism in a biochemical reaction tank difficultly maintains higher concentration, the treatment capacity is low, and a gravity sedimentation tank in a treatment system is low in surface load and large in floor area. The system comprises a denitrification and dephosphorization reaction unit and a solid-liquid separation unit connected in series with the denitrification and dephosphorization reaction unit, wherein the denitrification and dephosphorization reaction unit comprises an anaerobic zone, an anoxic zone and an aerobic zone which are sequentially communicated; an input end of the aerobic zone is communicated with an input end of the anoxic zone by a pipeline; the solid-liquid separation unit comprises a dissolved air deep tank and a flotation tank which are sequentially communicated; and an output end of the aerobic zone is communicated with an input end of the dissolved air deep tank. The technology comprises the steps of 1, anaerobic phosphorus release reaction, 2, denitrification reaction, 3, carbon oxidization, aerobic phosphorus absorption and nitration reaction, 4, deep tank air dissolution, and 5, solid-liquid separation. The system and the technology are particularly suitable for new construction of a continuous flow sewage treatment plant.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a sewage treatment system capable of increasing the concentration of activated sludge and a process thereof. Background technique [0002] At present, my country is in a period of rapid industrialization and urbanization, urban land prices continue to rise, and construction land is in short supply. Conservation of land is not only forced by factor constraints, but also a long-term survival strategy. Only when the economy grows steadily and a new way of building land for sewage treatment plants with less land occupation and high land use efficiency can we continue to promote urbanization and realize The goal of building a resource-saving and environment-friendly society. [0003] The sewage treatment system and its process for efficient nitrogen and phosphorus removal with short development time and small footprint have always been the focus of research in the field of s...

AI Technical Summary

Problems solved by technology

[0006] In view of the gravity sedimentation used in the existing sewage treatment process, the solid-liquid separation efficiency is low, and the sludge concentration effect is poor, which makes it difficult for the microorganisms in the biochemical reaction tank to maintain a high concentration, resulting in low treatment capacity; and the gravity sedimentation tank in the sewage treatment system The problem of low surface load and large floor area, the purpose of the present invention is to provide a sewage treatment system and its process that can increase the concentration of activated sludge, which saves construction land, low energy consumption for operation, good solid-liquid separation effect, and water discharge The water quality is stable and high-quality, which can be used in the new construction of continuous flow sewage treatment plants

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