MASB multi-stage anaerobic sludge bed reactor

Abstract

The invention relates to a sewage anaerobic biological treatment system, and especially relates to an MASB multi-stage anaerobic sludge bed reactor. The reactor comprises a plurality of anaerobic sludge bed reaction tanks connected in series, and comprises a sewage pump 1, solid-liquid separators, a water inlet pipe, a water discharge pipe, gas discharge pipes, sludge discharge pipes, and connection pipes. Compared with existing sewage anaerobic biological treatment technologies and especially existing anaerobic sludge bed reactor technologies, the technical scheme provided by the invention has the significant advantages of low project investment cost, low operation cost, good treatment effect, short treatment time, no dead corner, no blockage, easy maintenance, and controllable and adjustable treatment scale and effect. Also, system modularization is realized.

Description

technical field [0001] The invention relates to a sewage anaerobic biological treatment system, in particular to a MASB multistage anaerobic sludge bed reactor. Background technique [0002] In the existing sewage anaerobic biological treatment system, the anaerobic sludge bed reactor has been widely used all over the world due to its advantages of low energy consumption, high organic load, small footprint, low sludge output, and low operating cost. a wide range of applications. [0003] Existing anaerobic sludge bed reactors include the second-generation anaerobic sludge bed reactor (Up-flow Anaerobic Sludge Bed, referred to as UASB), etc., and the third-generation anaerobic sludge bed reactor The bed reactor is the anaerobic granular sludge expanded bed reactor (Expanded Granular Sludge Bed, referred to as EGSB), anaerobic internal circulation reactor (Inside Cycling, referred to as IC), etc., and the anaerobic biological reaction is completed in the same main reactor. ...

AI Technical Summary

Problems solved by technology

[0004] Existing anaerobic sludge bed reactors that complete the anaerobic biological reaction in the same main reactor have technical defects: acidification in the acidification stage of anaerobic biological treatment due to water shock, gas lift or agitation by internal stirring devices Bacteria, hydrogen-producing acetogenic bacteria in the hydrogen-producing acetic acid stage, and methanogenic bacteria in the methanogenic stage are difficult to form dominant bacterial groups in a specific space, thereby reducing the effect of anaerobic biological treatment; and in order to improve the effect of anaerobic biological treatment, It is necessary to greatly increase the volume of the anaerobic sludge bed reactor, thereby increasing the structural strength requirements of the reactor body and increasing the investment cost of the project

[0011] The Chinese patent (Patent No. ZL2006101187059) titled "A Column Anaerobic Reactor" reduces the organic load of the anaerobic reactor due to the filter beds and electrodes installed in the multi-stage reactor, and is easy to install in the reactor internal blockage

[0012] The Chinese patent (Patent No. ZL2010105174425) titled "A Three-Stage Three-Cycle Anaerobic Reactor" is just a simple stacking of three UASB upflow anaerobic sludge bed reactors. Both water inlet distributors and three-phase separators have no obvious effect in multi-stage reactors, and increase project investment costs

[0013] In the Chinese patent (Patent No. ZL2012100152861) titled "A Multi-Stage Anaerobic Reactor and Its Method for Preparing Methane", the stirring devices installed in the first-stage and second-stage reactors have no obvious effect, which enhances the Project investment cost; and packing beds are set in the second and third reactors, which reduces the organic load of the anaerobic reactor and is also easy to form blockage in the reactor

[0014] In the Chinese patent application (patent application number 2012100733126) titled "A Multi-cycle Multi-Stage Anaerobic Digestion System and Its Application", the three-stage reactors are all of the downflow type, unlike the upflow anaerobic sludge bed reactor In that way, the stirring effect of hydraulic power is used; and the effect of the first circulation system and the second circulation system is not obvious, and it also increases the project operating cost

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