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Title:
OXYGEN INJECTION DESULFURIZATION BASED SLUDGE TREATMENT METHOD AND ANAEROBIC DIGESTER
Document Type and Number:
WIPO Patent Application WO/2023/226470
Kind Code:
A1
Abstract:
The present application discloses an oxygen injection desulfurization based sludge treatment method and an anaerobic digester. The sludge treatment method comprises the following steps: S10. adjusting the sludge level in an anaerobic digester body, and further adjusting the volume of a gas phase space above the sludge in the anaerobic digester body; S20. injecting oxygen into the gas phase space and fully mixing the oxygen with biogas in the gas phase space; and S30. extending the residence time of the biogas in the anaerobic digester body by using the adjusted volume, and performing a desulfurization reaction of the biogas when the biogas stays in the anaerobic digester body until the desulfurization reaction of the biogas is completed. The volume of the gas phase space is adjusted, so that the volume meets the size required for the desulfurization reaction of the biogas, and oxygen is injected to improve the quality of the biogas after the desulfurization reaction of the biogas, thereby reducing the investment cost and operation cost of devices such as an anaerobic digester during biogas desulfurization.

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Inventors:
HU WEIJIE (CN)
ZHOU YOUFEI (CN)
ZHANG CHEN (CN)
Application Number:
PCT/CN2023/074372
Publication Date:
November 30, 2023
Filing Date:
February 03, 2023
Export Citation:
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Assignee:
SHANGHAI MUNICIPAL ENG DESIGN INST GROUP CO LTD (CN)
International Classes:
C02F11/04; B01D53/52; C02F3/28; C10L3/10
Foreign References:
CN114853300A2022-08-05
CN114853299A2022-08-05
CN102974213A2013-03-20
FR2956657A12011-08-26
CN109810885A2019-05-28
US20120270307A12012-10-25
Attorney, Agent or Firm:
SHANGHAI BESHINING LAW OFFICE (CN)
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