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Method for improving biological denitrification dephosphorization efficiency by using ultrasonic

A technology for nitrogen and phosphorus removal and biological nitrogen removal, applied in the direction of sustainable biological treatment, chemical instruments and methods, biological water/sewage treatment, etc. The effect of reaching the standard, improving the ability of microorganisms to remove nitrogen and phosphorus, and alleviating the problem of eutrophication in water bodies

Inactive Publication Date: 2006-12-27
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the current biological nitrogen and phosphorus removal process, the common problems are slow processing speed and long hydraulic retention time.

Method used

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  • Method for improving biological denitrification dephosphorization efficiency by using ultrasonic
  • Method for improving biological denitrification dephosphorization efficiency by using ultrasonic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Such as figure 1 As shown, there is a secondary sedimentation tank after the continuous biological denitrification and phosphorus removal facility, and the bottom of the secondary sedimentation tank is equipped with an excess sludge discharge port and a return sludge pipeline, which can be used to treat part of the return sludge on the return sludge pipeline. Ultrasonic irradiation is performed on the sludge, and the irradiated sludge microorganisms are returned to the water inlet of the denitrification and phosphorus removal facility. In this embodiment, the sludge containing microorganisms is extracted from the return sludge pipeline of the secondary sedimentation tank after the continuous biological denitrification and phosphorus removal reactor according to 1-6 times per day, and the extracted sludge Microorganisms are subjected to ultrasonic irradiation treatment for 5-30 minutes at an ultrasonic frequency of 20-40 kHz, and the amount of sludge extracted each time ...

Embodiment 2

[0017] Such as figure 2 As shown, when a batch-type denitrification and phosphorus removal reactor is used, 5%-25% of the mud-water mixture can be directly taken, concentrated by precipitation, and then ultrasonically treated for 5-30 minutes, and then returned to the reactor water inlet. Or for ultrasonication in the idle stage, the concentrated sludge at the bottom of the reactor can be directly taken for ultrasonication. The frequency of ultrasound used is 20-40kHz, and ultrasound is performed 1-6 times a day.

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Abstract

The invention discloses a biological denitrifying and dephosphorizing efficiency improving method through ultrasonic wave, which is characterized by the following: the partial condensed mud is disposed by ultrasonic radiation in the second-sedimenting pool or intermittent denitrifying and dephosphorizing reactor, which is constructed for several times everyday for water disposal flow with denitrifying and dephosphorizing function; the activity of microbe with denitrifying and dephosphorizing function is accelerated, which improves denitrifying and dephosphorizing ability through refluxing mud to denitrifying and dephosphorizing reactor or equipment.

Description

technical field [0001] The invention relates to a method for improving the efficiency of biological denitrification and phosphorus removal of sewage by using ultrasonic waves, which is a method for partially concentrating sludge in the secondary sedimentation tank after continuous denitrification and dephosphorization facilities or in intermittent denitrification and phosphorus removal reactors. Ultrasonic radiation is used to promote the activity of microorganisms with nitrogen and phosphorus removal functions in sludge, so as to improve the efficiency of nitrogen and phosphorus removal in sewage biological treatment facilities. Background technique [0002] The intensification of environmental pollution and water eutrophication has forced more and more countries and regions to formulate strict nitrogen and phosphorus discharge standards, which has also made sewage nitrogen and phosphorus removal technology a hot and difficult point in the field of sewage treatment. The cur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/12C02F1/36C02F1/58
CPCY02W10/10
Inventor 刘红谢倍珍
Owner BEIHANG UNIV
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