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Ultrasonic-assisting nitrogen and phosphorus removing process

A technology of denitrification and dephosphorization, ultrasonic, applied in the direction of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problem of insufficient carbon source, achieve low operating cost and high effect , The effect of reducing operating costs

Inactive Publication Date: 2010-11-24
UNIVERSTAR SCI & TECH SHENZHEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned problems, the present invention adopts a technology of ultrasonic treatment of sludge, and utilizes excess sludge or concentrated sludge to be refluxed to the anoxic section after ultrasonic radiation treatment, successfully solving the insufficient carbon source in the process of biological denitrification and dephosphorization problems, greatly reducing operating costs, and achieving the purpose of strengthening biological nitrogen and phosphorus removal

Method used

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  • Ultrasonic-assisting nitrogen and phosphorus removing process

Examples

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Embodiment 1

[0016] Such as figure 1 , Figure 4 As shown, an ultrasound-assisted A 2 / O biological denitrification process, take the following process steps:

[0017] (1) Sewage enters the anaerobic tank for anaerobic biological treatment. Anaerobic biological treatment is a biological treatment method in which facultative bacteria and anaerobic bacteria degrade and stabilize organic matter in the absence of molecular oxygen and combined oxygen. During anaerobic biological treatment, complex organic compounds are degraded, converted into simple compounds, and release energy;

[0018] (2) After the sewage passes through the anaerobic pool, it enters the anoxic pool. The primary function of the anoxic pool is to denitrify, and the nitrate nitrogen is transferred from the aerobic pool through the backflow of the mixed liquid. Usually, the internal return flow is 2-4 times that of the original Sewage flow, some organic matter is degraded and removed under the action of denitrifying bacteri...

Embodiment 2

[0023] Such as figure 2 , Figure 4 As shown, an ultrasonic-assisted UCT process takes the following process steps:

[0024] (1) Sewage enters the anaerobic tank for anaerobic biological treatment. Anaerobic biological treatment is a biological treatment method in which facultative bacteria and anaerobic bacteria degrade and stabilize organic matter in the absence of molecular oxygen and combined oxygen. During anaerobic biological treatment, complex organic compounds are degraded, converted into simple compounds, and release energy;

[0025] (2) After the sewage passes through the anaerobic pool, it enters the anoxic pool. The primary function of the anoxic pool is to denitrify. The denitrified sewage flows back to the anaerobic pool through the anoxic mixture, and the nitrate nitrogen passes through the aerobic mixture. The reflux is transmitted from the aerobic tank, usually the internal reflux flow is 2-4 times the raw sewage flow, and some organic matter is degraded an...

Embodiment 3

[0029] Such as image 3 , Figure 4 As shown, an ultrasonic-assisted SBR process takes the following process steps:

[0030] (1) Sewage enters the SBR pool through the filter between the grills and the grit chamber;

[0031] (2) After the sewage is aerated and precipitated in the SBR tank, the discharged supernatant is filtered by the decanter and disinfected in the disinfection tank, and then discharged for reuse;

[0032] (3), the sludge deposited in the SBR pool enters the concentration tank, and after the concentrated sludge part enters the ultrasonic reactor 4, the driving power supply 5 starts to work, and the horn 3 adjusts the transducer 2 to make the ultrasonic probe 1 generate ultrasonic waves, and the sewage The mud flows in from one end of the through hole of the ultrasonic probe 1, flows out from the other end after ultrasonic treatment, releases soluble COD through the breaking effect of the ultrasonic wave, and then flows back into the anoxic pool to supply th...

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Abstract

The invention discloses an ultrasonic-assisting nitrogen and phosphorus removing process. The ultrasonic sludge treatment is additionally arranged at the tail end of a secondary settling tank or a concentration tank, and ultrasonically-treated sludge reflows to an anaerobic tank, an anoxic tank or an SBR (Sequencing Batch Reactor) tank. By adopting an ultrasonic sludge treatment technology and utilizing that residual sludge or concentrated sludge reflows to an anoxic section after the ultrasonic radiation treatment, the invention successfully solves the problems of insufficient carbon sources in the biological nitrogen and phosphorus removing process, greatly reduces the operation cost, and achieves the aim of enhancing biological nitrogen and phosphorus removal.

Description

technical field [0001] The invention relates to a sewage treatment process, in particular to a process for improving the biological denitrification and phosphorus removal efficiency of sewage by using ultrasonic waves. Background technique [0002] The problem of water environment has attracted people's attention, and nitrogen and phosphorus lead to water eutrophication has a major impact, so more and more countries are forced to control the discharge of nitrogen and phosphorus more and more strictly. new challenges. [0003] The current biological nitrogen and phosphorus removal process has attracted much attention due to its low energy consumption and no secondary pollution. There are A 2 / O biological denitrification process, UCT process, SBR process, oxidation ditch process and various improved new processes, etc. Biological treatment of wastewater must provide sufficient carbon sources for microorganisms. Generally, BOD / TKN > 4 and BOD / TP > 20 are required. Howe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
Inventor 丁建生别红梅
Owner UNIVERSTAR SCI & TECH SHENZHEN
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