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System for treating anaerobic digestion liquid of sludge through acidification-free Fenton oxidation, and treatment method for anaerobic digestion liquid of sludge

A technology of anaerobic digestion and Fenton oxidation, applied in chemical instruments and methods, special compound water treatment, precipitation treatment, etc., can solve the problem of large dosage of chemicals

Pending Publication Date: 2020-12-04
BEIJING DRAINAGE GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the Fenton reaction needs to be carried out in an acidic environment. Adding acid is an essential step in the Fenton reaction, and the large dosage of chemicals is also one of the main drawbacks of the Fenton process. To develop a low-consumption and acid-free Fenton treatment The application of technology to sludge anaerobic digestion solution treatment is one of the important tasks of digestion solution treatment at present

Method used

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  • System for treating anaerobic digestion liquid of sludge through acidification-free Fenton oxidation, and treatment method for anaerobic digestion liquid of sludge
  • System for treating anaerobic digestion liquid of sludge through acidification-free Fenton oxidation, and treatment method for anaerobic digestion liquid of sludge

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Embodiment 1

[0069] The sludge from a sludge disposal center in Beijing is anaerobically digested after the thermal hydrolysis process. The anaerobically digested sludge is compressed by a plate and frame to produce sludge anaerobic digestion liquid, in which the COD is 2000mg / L and the pH is 8.0 , ammonia nitrogen concentration is 1500mg / L, BOD 5 It is 200mg / L, B / C is low, and the biodegradability is poor. The sludge anaerobic digestion solution is treated with the system for treating sludge anaerobic digestion solution without acidification Fenton oxidation in this embodiment.

[0070] Such as figure 1 and figure 2 As shown, this embodiment provides a system for treating sludge anaerobic digestion solution without acidification Fenton oxidation, which system includes in turn: a regulating tank 1, a coagulation sedimentation device, a Fenton catalytic oxidation device and a neutralization sedimentation device, wherein :

[0071] The coagulation sedimentation device comprises: a coagu...

Embodiment 2

[0087] The residual sludge of a sewage treatment plant is anaerobically digested and dehydrated by plates and frames to produce anaerobic digestion liquid. After anaerobic ammonia oxidation denitrification treatment, the COD is 1000mg / L, the pH is 8.0, and the ammonia nitrogen concentration is 80mg / L. BOD 5 It is 100mg / L, B / C is low, and the biodegradability is poor. The sludge anaerobic digestion solution is treated with the system for treating sludge anaerobic digestion solution without acidification Fenton oxidation in this embodiment.

[0088] Such as figure 1 and figure 2 As shown, this embodiment provides a system for treating sludge anaerobic digestion solution without acidification Fenton oxidation, which system includes in turn: a regulating tank 1, a coagulation sedimentation device, a Fenton catalytic oxidation device and a neutralization sedimentation device, wherein :

[0089] The coagulation sedimentation device comprises: a coagulation sedimentation tank 2,...

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Abstract

The invention discloses a system for treating anaerobic digestion liquid of sludge through acidification-free Fenton oxidation, and a treatment method for the anaerobic digestion liquid of sludge. Thesystem comprises an adjusting tank, a coagulating sedimentation device, a Fenton catalytic oxidation device and a neutralization and sedimentation device. The method comprises the following steps: introducing the anaerobic digestion liquid of sludge into the adjusting tank; conveying the anaerobic digestion liquid of sludge in the adjusting tank into the coagulating sedimentation device for coagulating sedimentation treatment; conveying effluent obtained after coagulating sedimentation treatment into the Fenton catalytic oxidation device for Fenton catalytic oxidation treatment; allowing a part of effluent obtained after Fenton catalytic oxidation treatment to flow back to the water inlet end of the Fenton catalytic oxidation tank and the rest effluent to enter the neutralization and precipitation device; and adjusting the pH value of the rest effluent entering the neutralization and sedimentation device in a neutralization and sedimentation tank, and then carrying out neutralizationand sedimentation treatment. According to the method, acidification-free treatment is realized, the dosage of Fenton reaction chemicals is reduced, operation cost is reduced, and the utilization efficiency of hydroxyl radicals and the removal rate of organic matters are improved.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and more specifically relates to a system for treating sludge anaerobic digestion liquid by non-acidification Fenton oxidation and a treatment method for sludge anaerobic digestion liquid. Background technique [0002] Sludge anaerobic digestion technology is one of the main technologies for sludge resource utilization at present. After sludge is anaerobically digested, the organic components are decomposed by methanogens to produce methane, water and carbon dioxide. In order to increase the available organic components in sludge, thermal hydrolysis technology is used as a sludge pretreatment technology before the sludge anaerobic digestion process. After the sludge is treated by thermal hydrolysis, the cells are broken and the intracellular substances flow out, which can Increase the concentration of organic matter in the feed to anaerobic digestion. However, with the process of increa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04
CPCC02F9/00C02F1/66C02F1/725C02F1/722C02F1/56C02F1/5236C02F1/5281C02F2001/007C02F2305/026
Inventor 李彦刚张树军李尚坤王佳伟罗京金秋燕张文珍葛勇涛孙冀垆
Owner BEIJING DRAINAGE GRP CO LTD
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