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Biochemical excess sludge reduction treatment method and device

A technology for excess sludge and treatment methods, applied in sludge treatment, water/sludge/sewage treatment, oxidation treatment of sludge, etc., can solve the problem of fouling, limit the long-term operation of the reactor, and the material requirements of the reactor high level question

Active Publication Date: 2021-04-20
CHINA PETROLEUM & CHEM CORP +1
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this invention has high requirements on the material of the reactor, and it will cause fouling, which limits the long-term operation of the reactor

Method used

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  • Biochemical excess sludge reduction treatment method and device
  • Biochemical excess sludge reduction treatment method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] use figure 1 The device treats biochemical excess sludge. Add 2000ppm of sodium hypochlorite and 80ppm of dodecyl dimethyl benzyl ammonium chloride to the biochemical residual sludge with a water content of 98% and an organic matter content of 72%, and add them to the premixer 1 together, mix for 0.5h, and pass through the screw Pump 201 feeds the mixture into Reactor 2. Heated to 120°C in reactor 2 and reacted for 2h. After the reaction, the liquid phase in the upper layer in the reactor 2 enters the sewage treatment system, and the solid phase in the lower layer enters the filter press 3 through a screw pump for pressure filtration treatment to obtain treated biochemical excess sludge. After analysis, the removal rate of organic matter reached 74%, the water content of mud cake was 60%, and the sludge weight reduction rate reached 97.66%. According to the requirements of GBT234852009, the mud cake can be used for sanitary landfill in this case.

Embodiment 2

[0063] use figure 1 The device treats biochemical excess sludge. Add 1000ppm of calcium hypochlorite and 80ppm of dodecyl dimethyl benzyl ammonium chloride to the biochemical residual sludge with a water content of 98% and an organic matter content of 72%, and add them together to the premix mixer 1 and mix for 0.5h , the mixture was fed into Reactor 2 via a screw pump. Heated to 120°C in reactor 2 and reacted for 2h. After the reaction, the liquid phase in the upper layer of the reactor enters the sewage treatment system, and the solid phase in the lower layer enters the filter press 3 through a screw pump for pressure filtration treatment to obtain treated biochemical excess sludge. After analysis, the removal rate of organic matter reached 55%, the water content of mud cake was 59.2%, and the sludge weight reduction rate reached 97.04%. According to the requirements of GBT234852009, the mud cake can be used for sanitary landfill in this case.

Embodiment 3

[0065] use figure 1 The device treats biochemical excess sludge. Add 100ppm of sodium hypochlorite, 200ppm of calcium hypochlorite, and 80ppm of dodecyl dimethyl benzyl ammonium chloride to the biochemical residual sludge with a water content of 98% and an organic matter content of 72%, and add them together to the premix mixer 1 , mixed for 0.5 h, and the mixture was fed into Reactor 2 via a screw pump. Heated to 120°C in reactor 2 and reacted for 2h. After the reaction, the liquid phase in the upper layer of the reactor enters the sewage treatment system, and the solid phase in the lower layer enters the filter press 3 through a screw pump for pressure filtration treatment to obtain treated biochemical excess sludge. After analysis, the removal rate of organic matter reached 72%, the water content of mud cake was 59%, and the sludge weight reduction rate reached 97.65%. According to the requirements of GBT234852009, the mud cake can be used for sanitary landfill in this c...

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Abstract

The invention provides a biochemical excess sludge reduction treatment method and a device. The biochemical excess sludge reduction treatment method comprises the following steps: enabling biochemical excess sludge to react with hypochlorite and quaternary ammonium salt, and collecting reduced sludge in a mixed material after reaction. The biochemical excess sludge reduction treatment device comprises a premixing mixer, a reactor and a filter press which are connected in sequence, an input pipeline for biochemical excess sludge, hypochlorite and quaternary ammonium salt is arranged on the premixing mixer, and a discharge mechanism for solid-phase substances is arranged at the lower part of the reactor; the upper part of the reactor is provided with a liquid-phase substance discharge mechanism. According to the method and the device, the volume of the biochemical residual sludge can be greatly reduced, the reduction rate of the biochemical residual sludge can reach 96 percent or above, and the method and the device have the advantages of good treatment effect, low medicament consumption, mild reaction conditions, low treatment cost, low energy consumption and good dehydration effect.

Description

technical field [0001] The invention relates to the field of sludge treatment, in particular to a method and device for reducing the amount of biochemical excess sludge. Background technique [0002] In recent years, my country's environmental protection industry has developed rapidly, and the sewage treatment capacity and treatment efficiency have increased rapidly. The construction of a large number of sewage treatment plants has undoubtedly played a significant role in protecting the water environment, but a large amount of biochemical excess sludge has been produced. For this part of biochemical sludge, the sewage treatment plant usually adopts the method of "mechanical dehydration + outsourcing". Although the investment in equipment is small, only 10,000m 3 The volume of sludge with 98% water content is reduced to about 1200 tons. The volume of sludge is huge, and the residual sludge contains a large amount of toxic and harmful substances. Therefore, enterprises need to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/00C02F11/06C02F11/122
Inventor 杨宇宁桑军强高峰
Owner CHINA PETROLEUM & CHEM CORP