Two-segment internal-recycle one-piece rectangular anaerobic digester

Abstract

The invention relates to a two-segment internal-recycle one-piece rectangular anaerobic digester including a cyclic reaction zone and a separation zone; the whole digester is surrounded by the sidewall into a cuboid structure, the digester comprises respectively, from bottom to top, the cyclic reaction zone and the separation zone; the cyclic reaction zone is surrounded by a bottom plate and the lower part of the sidewall; the cyclic reaction zone is internally, from bottom to top, provided with an emptying pipe, a feeding pipe, a one-pipe multi-branch three-dimensional water distributor, a lower sampling tube, a middle sampling tube, an upper sampling tube, a first circulation zone symmetric baffle plate, a second circulation zone symmetric baffle plate, a reflux pipe, a one-pipe multi-branch three-dimensional material distributor, a left guide plate and a right guide plate; the separation zone is, from bottom to top, provided with a gas collecting plate, a gas collecting hole plate, an overflow weir, a gas collector, a water outlet pipe, a gas circulation pipe, a top cover and a total gas collecting tube. The two-segment internal-recycle one-piece rectangular anaerobic digester is uniform in material distribution, high in treatment efficiency, good in liquid-solid mass transfer effect, less in hydraulic dead space, and low in power consumption, simultaneously can form a two segments of inner cycle in the digester, can dilute in-let water, and is strong in organic loading shock resistant capability.

Description

technical field [0001] The invention relates to a two-stage internal circulation integrated rectangular anaerobic digester, which belongs to the technical field of organic waste treatment. Background technique [0002] Anaerobic biological wastewater treatment technology has been widely used in the treatment of high-concentration organic wastewater due to its advantages of high volume load, small footprint, less residual sludge and low operating costs. It mainly uses the metabolic characteristics of anaerobic microorganisms, and uses the reduced organic matter as the acceptor under the condition of no oxygen supply, and at the same time generates renewable energy biogas. 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. [0003] In recent years, anaerobic reactor technology has developed rapidly, especially since Lettinga et ...

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Problems solved by technology

[0004] The flow state of the mixed liquid in the high-efficiency anaerobic reactor directly affects the solid-liquid mass transfer effect. If there is channel flow and dead space in the reactor, the effective volume of the reactor will be significantly reduced, making the actual hydraulic retention time much shorter than the theoretical one. Hydraulic retention time, which affects the efficiency and effectiveness of wastewater treatment

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