Multi-stage inner circulation anaerobic reactor

Abstract

The invention relates to a multi-stage internal circular anaerobic reactor which aims at solving the defects of existing anaerobic reactors, such as difficulty in separating the sludge and hydraulic retention time, long treatment period, high solid-containing content of effluent, and limit to the treatment of organic wastewater with medium and high temperature and high concentration. The anaerobic reaction zone of the reactor is arranged above three stages, each of which is provided with a riser pipe used for leading fluid to flow up to a gas-liquid separator at the top part through an air collection baffle-board, a recirculatory pipe used for leading the fluid to flow down to a solid-liquid separator at the bottom part and a water distributor used for leading the fluid to enter the anaerobic reaction zone to carry out fluid circulation. The reactor is easy to operate and manage, optimizes disposition conditions and improves biomass in the reactor. The full contact of wastewater and microbe strengthens the mass transfer between the wastewater and particle sludge and guarantees the normal operation of the reactor in larger volume load.

Description

technical field [0001] The invention relates to biochemical environment-friendly engineering technology, in particular to a multi-stage internal circulation anaerobic reactor. Background technique [0002] The development history of anaerobic reactors can be divided into three typical stages: the first stage is represented by continuous stirring (CSTR), and the disadvantages are: it is difficult to separate the sludge from the hydraulic retention time, the treatment cycle is long, and the solid content of the effluent is high ; The second stage is represented by the upflow anaerobic sludge bed (UASB), which is better than the first generation reactor, but it is limited to the treatment of medium-high temperature and high-concentration organic wastewater; the third stage is the expanded granular sludge bed (ECSB ) and the internal circulation reactor (IC) as representatives, further improved the performance of the reactor, but not perfect. Contents of the invention [0003...

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Problems solved by technology

[0002] The development history of anaerobic reactors can be divided into three typical stages: the first stage is represented by continuous stirring (CSTR), and the disadvantages are: it is difficult to separate the sludge from the hydraulic retention time, the treatment cycle is long, and the solid content of the effluent is high ; The second stage is represented by the upflow anaerobic sludge bed (UASB), which is better than the first generation reactor, but it is limited to the treatment of medium-high temperature and high-concentration organic wastewater; the third stage is the expanded granular sludge bed (ECSB ) and the internal circulation reactor (IC), further improving the performance of the reactor, but not perfect

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