Integrated synchronous phosphorus removal denitrification deep bed filter and treatment system and treatment method of deep bed filter

Abstract

The invention provides an integrated synchronous phosphorus removal denitrification deep bed filter and a treatment system and a treatment method of the deep bed filter. The integrated synchronous phosphorus removal denitrification deep bed filter comprises a filter main body, wherein the lower part of the filter main body is provided with a porous supporting layer, a flap filter material layer is arranged above the porous supporting layer, a suspended filler layer is arranged above the flap filter material layer, an overhead layer is arranged above the suspended filler layer, and the filter main body is provided with a water inlet, an air inlet pipeline and a chemical phosphorus removal dosing inlet in the porous supporting layer; the flap filter material layer comprises multiple downward-inclined flaps for hanging a fibrous filler, and the flaps are arranged in a crossed mode in sequence from two sides of the filter main body; the filter main body is provided with a carbon source supplementation inlet below the porous supporting layer; and the bottom of the filter main body is provided with a backwash water outlet. According to the technical scheme of the invention, chemical phosphorus removal and denitrification are integrated, the synchronous denitrification and phosphorus removal efficiency is high, the floor area is small, and water resources are saved.

Description

technical field [0001] The invention belongs to the technical field of sewage, and in particular relates to an integrated synchronous phosphorus removal and denitrification deep bed filter, a treatment system and a treatment method thereof. Background technique [0002] With the improvement of comprehensive discharge standards for effluent from urban sewage treatment plants, some areas have raised the discharge standards for effluent from sewage treatment plants from the primary A standard for comprehensive discharge of raw sewage (TN<15 mg / L; TP<0.5mg / L) to the surface Requirements for four types of water bodies (TN<1.5 mg / L; TP<0.3 mg / L), which put forward higher requirements for the removal of nitrogen and phosphorus in sewage treatment plants. It is difficult to meet the discharge standards for nitrogen and phosphorus in the effluent of traditional secondary biological treatment. It is necessary to carry out deep nitrogen and phosphorus removal on the seconda...

AI Technical Summary

Problems solved by technology

[0004] (1) Simply using biological methods cannot guarantee the stability of the effluent

Invention patent CN104445619B discloses a process and device for deep denitrification and dephosphorization of wastewater. Although this process can realize the deep control of nitrogen and phosphorus, the membrane modules are easy to pollute, difficult to maintain, high in cost, and low in water output, so it is difficult to apply to urban sewage treatment plant

Patent CN105417691A discloses a construction method of an anoxic biological filter denitrification synchronous phosphorus and nitrogen removal advanced treatment system. To ensure the stability of the effluent, it is not suitable for the deep denitrification and phosphorus removal of urban sewage treatment plants, and chemical phosphorus removal methods are needed to assist the effluent to meet the discharge standards

[0005] (2) The traditional deep denitrification and dephosphorization process separates chemical dephosphorization and denitrification denitrification, which increases infrastructure and operating costs, and the large footprint is not suitable for upgrading and upgrading existing small and medium-sized urban sewage treatment plants

However, it is difficult to apply this combination process for the upgrading and upgrading of existing small and medium-sized urban sewage treatment plants, because of its small footprint and insufficient space for advanced treatment of secondary effluent

[0006] (3) Lack of synchronous chemical phosphorus removal, denitrification and denitrification integrated process to save operating costs

[0007] (4) The backwash cycle of the traditional filter is short, and there is a lack of automatic control equipment that can be adjusted according to the change of water head loss

The traditional quartz sand filter has poor hydraulic conditions, is easy to block, and has a short backwash cycle, while the present invention uses suspended fillers, which has good hydraulic conditions, is not easy to block, and has a long backwash cycle; at the same time, existing waterworks filters often use a single Backwash cycle, lack of automatic control system, resulting in waste of energy resources

At the same time, for simultaneous phosphorus removal and denitrification filters, flocs are formed during the filtration process, which increases the head loss of the filter

The phosphorus content of the secondary effluent is different in different seasons. Dosing corresponding phosphorus removal agents according to different phosphorus content is an effective measure for energy saving and consumption reduction, but the change of backwash cycle caused by it is also difficult to control

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