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Composite anaerobic reactor with inner circulation

An anaerobic reactor and reactor technology, which are applied in anaerobic digestion treatment, waste fuel and other directions, can solve the problems of low utilization efficiency of the second reaction zone and the like

Inactive Publication Date: 2007-02-21
TSINGHUA UNIV
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Problems solved by technology

[0005] The present invention proposes a composite internal circulation anaerobic reactor, so that the reactor can not only retain the advantages of high efficiency and less land occupation of the internal circulation anaerobic reactor, but also overcome the concentration of suspended solids in the effluent when treating medium and low concentration organic wastewater Disadvantages of high (SS), uneven internal circulation and low utilization efficiency of the second reaction zone

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  • Composite anaerobic reactor with inner circulation
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Embodiment Construction

[0011] The structure of the composite internal circulation anaerobic reactor provided by the present invention is as figure 2 shown. Contains a reactor body, an inlet pipe 1, an outlet pipe 9 and a biogas pipe 10 arranged at the top of the reactor. The inside of the reactor body contains a reaction zone 15, an upflow tube 4, a downflow tube 7 and an upper part of the upflow tube 4. The gas-liquid separation zone 5; the reaction zone 15 top is provided with a gas collection hood 11, and the top of the gas collection hood 11 is connected with the described riser tube 4, between the gas-liquid separation zone 5 and the gas collection hood 11 A downflow zone 12 and a filter zone 13 are provided, and the downflow zone 12 and the filter zone 13 are separated by a cylindrical partition 14; the bottom of the downflow zone 12 is connected with the filter zone 13 and the downflow pipe 7 respectively, and is close to the reactor The wall; the downflow pipes 7 adopt 2 to 4 pieces and ar...

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Abstract

This invention relates to an improved internal circulating anaerobic bioreactor. When the present internal circulating anaerobic bioreactors are used to treat low-concentration organic wastewater, the SS content in the outlet water is high, the internal circulating liquid ans the inlet water is not adequately mixed, and the utility of the second reaction zone is low. The improved internal circulating anaerobic bioreactor in this invention retains the upcast pipe, the downcast pipe and the gas-liquid separation zone, while uses a filtration zone to replace the precipitation zone, changes the single downcast pipe into 2-4 pipes with the equal space, and cancles the second reaction zone. The improved internal circulating anaerobic bioreactor has such advantages as simplified structure, high volume utility, low SS content in the outlet water, no sludge loss and high reaction efficiency. The volume load of the improved internal circulating anaerobic bioreactor is four times that of UASB reactor, with 20 kg COD / (m3 .d) when treating medium-concentration organic wastewater (such as beer wastewater), and 8 kg COD / (m3 .d) when treating low-concentration organic wastewater. Besides, the improved internal circulating anaerobic bioreactor also has such advantages as small space area, stable running and easy operation.

Description

technical field [0001] The invention relates to an internal circulation anaerobic bioreactor, which belongs to the technical field of anaerobic biological treatment of wastewater. Background technique [0002] The internal circulation anaerobic reactor is a high-efficiency anaerobic reactor developed on the basis of the upflow anaerobic sludge layer (UASB) reactor (such as figure 1 shown). The reaction zone of the reactor is divided into a first reaction zone 2 and a second reaction zone 6 . The waste water enters the first reaction zone 2 from the water inlet pipe 1 at the bottom of the reactor. Most of the organic matter is removed in the first reaction zone 2, and the second reaction zone 6 is a finishing section. The two reaction zones are connected in series to enhance the stability of the reactor operation. After the waste water is treated in two stages, it is discharged after sedimentation in the sedimentation zone 8 . The internal circulation system, including the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/28
CPCY02E50/30
Inventor 吴静
Owner TSINGHUA UNIV
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