Internal-circulation aerobic granule sludge bioreactor

Abstract

The invention discloses an internal-circulation aerobic granule sludge bioreactor, and particularly relates to an aerobic granule sludge bioreactor with the functions of internal circulation, biological contact flocculation and filtering. The aerobic granule sludge bioreactor comprises a cylinder body, a bottom plate, an inverted butt conical drum, an upper annular water collecting tank, an upper water collecting pipe, a lower annular water collecting tank, a lower water collecting pipe, an upper water outlet pipe, a lower water outlet pipe, a current plate, a high-voltage fan, an air inlet main pipe, an annular aerator pipe, a circulating pump, a communicating water inlet pipe, a circulating pump water outlet pipe, a communicating water outlet pipe, a sludge return pump, an upper part sludge outlet pipe, a middle sludge outlet pipe, a lower part sludge outlet pipe, a sludge collecting pipe, a sludge collecting drum, a sludge discharge pipe, a water inlet pipe, a sludge distribution pipe, a water distribution hole, a through hole, an annular water distribution tank and an air baffle. The aerobic granule sludge bioreactor has the advantages that the height-diameter ratio of the bioreactor is high, a water head of a front section IC anaerobic reactor can be sufficiently utilized, a large amount of aerobic granule biological sludge with large particle sizes and good activity are produced, the use ratio of oxygen is high, the volumetric loading rate of organic matter is high, the removal rate of COD is high, and the bioreactor can be operated in various ways, is flexible to adjust and small in land occupation, and saves power consumption.

Description

technical field [0001] The invention relates to an aerobic bioreactor, in particular to an aerobic granular sludge bioreactor with the functions of internal circulation, biological contact flocculation and filtration Background technique [0002] As we all know, the aerobic granular sludge reactor has the characteristics of not being prone to sludge bulking, strong impact resistance, high organic load, and the integration of different types of microorganisms (aerobic, facultative and anaerobic microorganisms). Recent research results have shown that aerobic granular sludge can be used to treat high-concentration organic wastewater, high-salinity wastewater and many industrial wastewaters. Except for BAS and SBR, traditional aerobic reactors such as ordinary aeration tanks and contact oxidation tanks are difficult to form aerobic granular sludge. In addition, when treating high-concentration organic wastewater, the effluent from the traditional IC reactor falls directly into...

AI Technical Summary

Problems solved by technology

Although the amount of biological sludge has been increased through fillers, the utilization rate of oxygen is not very high

[0004] China's application number is 200810137631, an air-lift internal circulation intermittent aerobic granular sludge reactor, the height-to-diameter ratio of the reactor is 15, the circulation process is long, and good granular sludge can be formed, but the air bubbles in the central tube and The water flows upward in the same way, the air-water contact time is short, and the utilization rate of oxygen is not very high.

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