Anaerobic bioreactor of air -lift type expanded bed

Abstract

The invention discloses an anaerobic bioreactor of an air-lift type expanded bed, which comprises an anaerobic bioreactor body, a granular sludge group diffuser, a lower gas shunting chamber, an upper gas shunting chamber, a three-phase separator, a solid-liquid separation chamber, a gas collecting apparatus and the like, wherein a lateral wall of the anaerobic bioreactor body is provided with a back flow pipe, a gas discharge pipe, an upper mud pipe and a water outlet pipe in turn from top to bottom; the middle part of the three-phase separator is provided with the back flow pipe which passes through the lateral wall of the anaerobic bioreactor body; the solid-liquid separation chamber is arranged outside the three-phase separator; a water outlet ring cavity is formed between the outer wall of the solid-liquid separation chamber and the inner wall of the reactor body; the top part of the solid-liquid separation chamber is communicated with the gas collecting apparatus; and the gas collecting apparatus is provided with a gas collecting pipe and a marsh gas discharge pipe. The anaerobic bioreactor restrains short flow phenomena by collecting gas sectionally and increasing the ratio of height to diameter, improves sludge retention, optimizes the flora ecology, eliminates the problem of gas streaming, sufficiently degrades pollutants, and has a high volume efficiency and strong impact resistance.

Description

technical field [0001] The invention relates to an anaerobic bioreactor, in particular to an air-lift expanded bed anaerobic bioreactor. Background technique [0002] Anaerobic biological treatment does not require oxygen, has low sludge production and can recover biogas, and is favored by the environmental engineering field. Anaerobic bioreactor is the core carrier of anaerobic biological treatment process, and the efficiency of anaerobic bioreactor reflects the current level of anaerobic biological treatment engineering. The development of high-efficiency anaerobic bioreactors has important practical significance for promoting the application of anaerobic biological treatment processes and completing the energy-saving and emission-reduction tasks issued by the state. [0003] The research on anaerobic bioreactors has a history of more than one hundred years, during which three generations of anaerobic bioreactors have been developed. The widely used anaerobic bioreactors...

AI Technical Summary

Problems solved by technology

In high-efficiency anaerobic bioreactors, due to the fast influent flow rate and large biogas output, the loss of organisms and the short-flow phenomenon of the reactor are serious, which restricts the further improvement of the efficiency of the reactor.

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