Anaerobic membrane bioreactor for sewage treatment

Abstract

The invention discloses an anaerobic membrane bioreactor for sewage treatment. The anaerobic membrane bioreactor comprises a shell and a filter material layer arranged in the shell, and further comprises a high-pressure gas backflushing structure arranged above the filter material layer and comprising a high-pressure gas distribution structure and a plurality of high-pressure gas nozzles arrangedon the high-pressure gas distribution structure, wherein openings of the high-pressure gas nozzles face the filter material layer; a low-pressure gas disturbance structure arranged below the filter material layer and comprising a low-pressure gas distribution structure and a plurality of low-pressure gas nozzles arranged on the low-pressure gas distribution structure, wherein openings of the low-pressure gas nozzles face the filter material layer; when the filter material layer is blocked, high-pressure gas sprayed by the high-pressure gas nozzles is used for backwashing the filter material layer; and when the filter material layer is not blocked, the low-pressure gas nozzles are used for spraying low-pressure gas near the filter material layer to improve the flowability and disturbance ofsewage near the filter material layer, so that the scouring effect of the sewage on the filter material layer is improved, the blocking period of the filter material layer is prolonged, the treatmenteffect of the reactor is improved, and the backwashing frequency is reduced.

Description

Technical field[0001]The invention relates to the technical field of sewage treatment, in particular to an anaerobic membrane bioreactor for sewage treatment.Background technique[0002]Anaerobic treatment technology has been developed for many years. Anaerobic wastewater treatment technology has developed rapidly because of its low operating cost, available biogas production and a series of advantages in the treatment of high-concentration wastewater. Anaerobic biological treatment is to convert most of the organic matter into methane and carbon dioxide with the help of transforming anaerobes and facultative anaerobes under anaerobic conditions.[0003]At present, the filter material layer in the existing anaerobic membrane bioreactor used for sewage treatment will be clogged frequently, and the backwashing after the blockage is not uniform enough, and all the clogged filter material layers cannot be cleaned, causing clogging There will still be some blockages in the future. Therefore,...

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Problems solved by technology

[0003] At present, the filter material layer in the existing anaerobic membrane bioreactor used for sewage treatment will be blocked frequently, and the backwashing after the blockage is not uniform enough, and all the blocked filter material layers cannot be cleaned, resulting in blockage There will still be partial blockage in the future

Therefore, the treatment effect of the anaerobic membrane bioreactor is greatly reduced, and after the existing anaerobic membrane bioreactor has been washed many times, the sludge may enter the outlet pipe with the sewage, and after a long period of accumulation, resulting in Blockage of the outlet pipe

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