Sludge circulation type high-efficiency hydrolysis reaction device

Abstract

A sludge circulation efficient hydrolytic reactor comprises a reaction zone, mud lifting zone, a guide zone, a sludge reflow zone and a precipitation zone. The top of the reaction zone is in an umbrella shape, and the inner wall of the umbrella shape is provided with guide plates; the reaction zone is provided with a rectangular stirring paddle, the mud lifting zone is provided with a screw propeller, the rectangular stirring paddle and the screw propeller are fixed to a coaxial stirring link; wastewater flows in the reactor in a circulatory manner; the reactor enables internal circulation of sludge, requires no precipitation tank, makes efficient use of its interior space and has the advantages of high mass transfer capacity, biomass quantity, high hydrolytic efficiency, low cost, small size and the like.

Description

technical field [0001] The invention belongs to the field of wastewater treatment, and mainly relates to a novel sludge circulation type high-efficiency hydrolysis reaction device that can be applied industrially and efficiently and stably pretreat high-concentration organic wastewater. Background technique [0002] The process of hydrolytic acidification mainly uses hydrolysis and acid-producing fermentation microorganisms to decompose solids, macromolecules and organic substances that are not easily biotransformed into small molecular organic substances that are easy to biodegrade. The biodegradability of wastewater can be greatly improved, so that the subsequent good Aerobic or anaerobic biological treatment units are treated with less energy consumption and shorter residence times. At present, hydrolytic acidification reactors are mostly used as pretreatment equipment for high-concentration organic wastewater to improve the biodegradability of wastewater, and can replace...

AI Technical Summary

Problems solved by technology

The hydrolytic acidification reactor generally adopts the traditional plug-flow design, which has high requirements on the water distribution system, and is prone to local acidification, resulting in sludge floating. The residence time required for sewage treatment is long, the equipment is bulky, and there are channel flow, short Problems such as flow phenomenon and easy slagging on the surface seriously affect the efficiency of sewage treatment and the quality of effluent water

In addition, upflow anaerobic sludge bed, anaerobic filter and other process forms are also used as hydrolytic acidification reactors, but these process forms have high requirements on sewage water quality, and need to be equipped with primary sedimentation tanks. The water distribution system and process operating conditions more demanding

In recent years, the Stirred Tank Reactor (CSTR) has been used for anaerobic hydrolysis and acidification treatment, because of its advantages of good raw material adaptability, high efficiency, uniform mass transfer, and effective avoidance of scum and crusts, it has been applied to a certain extent. The biomass in the reactor is low, sludge return facilities are required, and the impact load resistance is not strong

[0004] To sum up, the disadvantages of the traditional anaerobic hydrolysis acidification device include: (1) The push flow or upflow process has problems such as poor mass transfer effect, local acidification, and high requirements for influent water quality and water distribution system; (2) The complete mixing process has problems such as low biomass, sludge reflux, and weak impact load resistance.

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