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Microwave-hydrogen peroxide synergism-based method and device for treating residual sludge

A technology of excess sludge and hydrogen peroxide, applied in the direction of sludge treatment through temperature control, oxidation treatment of sludge, etc., can solve the problems of increasing the difficulty of reactor design and production, unfavorable treatment technology economy, etc., to reduce energy consumption, The effect of short process and reducing potential harm

Inactive Publication Date: 2011-09-21
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the treatment condition of this microwave treatment method is a high-temperature airtight and pressurized environment. Generally, a good treatment effect can be achieved at a temperature of 120°C-170°C or even higher, which increases the difficulty of design and production of the reactor, and is not conducive to the economy of this treatment technology. change

Method used

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  • Microwave-hydrogen peroxide synergism-based method and device for treating residual sludge
  • Microwave-hydrogen peroxide synergism-based method and device for treating residual sludge
  • Microwave-hydrogen peroxide synergism-based method and device for treating residual sludge

Examples

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Effect test

Embodiment 1

[0040] The excess sludge treatment device based on microwave-hydrogen peroxide synergy such as figure 2 As shown, it mainly includes heat exchanger and microwave reactor;

[0041] In the microwave reactor chamber 6 of the microwave reactor (configuration 2450MHz or 915MHz microwave source) with the microwave source 5, a reaction vessel 7 is arranged, and a stirring speed of 40-120rpm is installed in the reaction vessel 7. Stirrer 8 and temperature measuring probe 9, and the stirring bar of stirrer 8 and the other end of temperature measuring probe 9 lead to the outside of described microwave reactor;

[0042] The wall of the microwave reactor is provided with a lye inlet 1 and a hydrogen peroxide dosing port 2, and the lye inlet 1 and the hydrogen peroxide dosing port 2 are respectively equipped with a lye that communicates with the reaction vessel 7. pipeline;

[0043]The heat exchanger 10 is arranged outside the microwave reactor, and the heat exchanger 10 has a first slu...

Embodiment 2

[0048] The excess sludge treatment device based on microwave-hydrogen peroxide synergy is the same as that in Example 1.

[0049] (1) After the remaining sludge with a water content of 98% discharged from the concentration tank of the urban sewage treatment plant is concentrated by centrifugation, it is adjusted to a mud-water mixture with a concentration of 25g / L;

[0050] (2) The mud-water mixture obtained in step (1) is preheated in a heat exchanger (waste heat can be used as a heat source) and then sent to a microwave reactor in batches (the microwave reactor is equipped with a microwave source of 2450MHz or 915MHz) Then when the mud-water mixture is stirred (stirring speed is 40rpm), open the microwave source of the microwave reactor, carry out microwave radiation heating to the mud-water mixture with the microwave of 2450MHz or 915MHz, make the mud-water mixture be 5 ℃ according to the heating rate When the rate of temperature rise per minute is 60 ℃ when the mud-water m...

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Abstract

The invention relates to a technology for pre-treating residual sludge, in particular to a microwave-hydrogen peroxide synergism-based method and device for treating residual sludge. In the method, a hydrogen peroxide solution is fed according to the mass ratio of pure hydrogen peroxide to the dry weight of the sludge being 0.2-2; under the normal-pressure opening condition, the high-efficiency decomposition of the residual sludge is realized by adopting a microwave-hydrogen peroxide technology and the subsequent biological availability of the residual sludge is improved. Before reaction, the treatment effect of the residual sludge is enhanced by controlling the condition of pH value. The device disclosed by the invention mainly comprises a heat exchanger and a microwave reactor. The method disclosed by the invention has the advantages of simple process, short flow and high efficiency. In addition, the treated residual activated sludge can be recycled. The device disclosed by the invention has less investment and is suitable for various medium-small systems for treating the residual sludge.

Description

technical field [0001] The invention belongs to the field of solid waste treatment and resource recovery and reuse, and relates to an excess sludge pretreatment technology, in particular to an excess sludge treatment method based on microwave-hydrogen peroxide synergy, and a method based on microwave-hydrogen peroxide Synergistic excess sludge treatment device. Background technique [0002] With the development of society and economy, the increase of the total amount of sewage treatment and the improvement of treatment standards, a large amount of surplus activated sludge (abbreviated as surplus sludge or sludge) has been produced in urban sewage plants. The high cost and other problems brought about by its treatment and disposal have become a serious burden on the normal operation of sewage treatment plants. Therefore, the cost-effective treatment and disposal of excess activated sludge has become an urgent and therefore severe challenge. [0003] In the process of sludge ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/18C02F11/06
Inventor 魏源送王亚炜阎鸿肖本益刘俊新
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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