Process and device for integrated denitrification, carbon and phosphorus removal for advanced treatment of printing and dyeing wastewater

A printing and dyeing wastewater, advanced treatment technology, applied in biological water/sewage treatment, water/sludge/sewage treatment, aerobic and anaerobic process treatment, etc., can solve high operating costs, serious secondary pollution, secondary biochemical It is difficult for the effluent to meet the high standard discharge requirements and other problems, so as to solve the effect of long process and low operating cost

Active Publication Date: 2021-03-05
DONGHUA UNIV +1
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, the problem in engineering application is that the effect of denitrification and phosphorus removal is unstable, especially for industrial wastewater containing toxic substances. The denitrification and phosphorus removal bacteria are often inhibited, and the secondary biochemical effluent is difficult to meet high standards for discharge. Require
However, the advanced treatment technology aimed at removing organic matter in the above-mentioned engineering applications does not have the function of nitrogen and phosphorus removal.
If the biological nitrogen and phosphorus removal technology is used in the advanced treatment, it will face the problem of insufficient organic carbon source, while the chlorine oxidation denitrification, flocculation and phosphorus removal technologies will have high operating costs, serious secondary pollution and coagulation of sludge. The problem of high yield

Method used

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  • Process and device for integrated denitrification, carbon and phosphorus removal for advanced treatment of printing and dyeing wastewater

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Embodiment

[0027] like figure 1 As shown, it is an integrated denitrification, carbon and phosphorus removal device for advanced treatment of printing and dyeing wastewater provided by the present invention. 33 is provided with water inlet pump inlet pipe regulating valve 11, and water inlet pump outlet pipe 6 communicates with return pipe 7, filter pond water inlet pipe 29 at the bottom of filter pond 16 respectively, and return pipe 7 is provided with return pipe regulating valve 8, and filter pond inlet Water pipe 29 is provided with filter tank water inlet regulating valve 9, filter tank water inlet pipe check valve 10, and the top of filter tank 16 is provided with water outlet sump 17, and outlet water sump 17 is communicated with the main outlet channel 15 on one side thereof, and the outlet main The bottom of the canal 15 is respectively communicated with the water outlet pipe 4, the backwash drain pipe 18, and the nitrification liquid return pipe 2. The outlet pipe 4 is provided...

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Abstract

The invention discloses an integrated denitrification, carbon and phosphorus removal process and device for advanced treatment of printing and dyeing wastewater. The device includes a water inlet pool, the water inlet pool is connected with the water inlet pump, the water inlet pump is connected with the filter tank, the upper part of the filter tank is provided with a water outlet sump, the water outlet sump is connected with the outlet water channel, and the outlet water channel is respectively connected with the outlet pipe, backwash The drain pipe and the nitrifying liquid return pipe are connected; the filter tank is connected to the outlet end of the blower through the air main pipe. The process of denitrification, carbon removal and phosphorus removal is as follows: the secondary biochemical effluent of printing and dyeing wastewater enters the first filter material layer, and the iron-biomass carbon reduction of refractory organic matter in the wastewater is reduced to open-loop and broken chain, and phosphorus is removed at the same time; the treated wastewater Enter the second filter material layer on the upper layer to remove refractory organic matter in the wastewater, and convert the ammonia nitrogen in the wastewater into nitrate nitrogen; the effluent from the upper layer of the filter is returned to complete the denitrification process. The invention completes the processes of carbon removal, nitrogen removal and phosphorus removal in the same filter tank without adding denitrification carbon source, easy operation and management, and low investment and operation costs.

Description

technical field [0001] The invention belongs to the technical field of industrial wastewater treatment, and in particular relates to a process and device for synchronous denitrification, carbon and phosphorus removal for advanced treatment of printing and dyeing wastewater. Background technique [0002] At present, the wastewater discharge standards of textile printing and dyeing industrial parks generally implement the first-level B or even first-level A standards in the "Pollutant Discharge Standards for Urban Sewage Treatment Plants" (GB18918-2002), and it is difficult to meet the discharge requirements stably by relying on traditional physical, chemical and biochemical secondary treatments . On the basis of the secondary biochemical treatment, the tertiary advanced treatment is added to further remove the remaining refractory organic matter, nitrogen, and phosphorus pollutants in the printing and dyeing wastewater, which is an important goal of wastewater treatment upgra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/30
CPCC02F3/302C02F2301/046
Inventor 薛罡陈红李响钱雅洁张文启刘振鸿王小暖安婧汪钟凝刘云帆李前李珂陈畅愉
Owner DONGHUA UNIV
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