A self-sustaining air flotation screening device used in an anaerobic digestion reaction device

Abstract

The invention discloses a self-sustaining air flotation screening device used in an anaerobic digestion reaction device, comprising a screening tank, the screening tank is composed of a lower tank body and an upper tank body, a partition is installed in the lower tank body, the There are two sets of partitions and the lower tank is divided into a feed chamber, a return chamber and a sedimentation chamber. A semicircular protective plate is provided above the return chamber, and an upper tank is provided above the semicircular protective plate. body, the self-sustaining air flotation screening device used on the anaerobic digestion reaction device is connected with the anaerobic digestion reaction device through the set screening tank, and the digested material in the anaerobic digestion reaction device is transported through the feed chamber, and the generated micro The air bubbles screen the light and highly active methanogenic microorganisms and return them to the main reactor through the reflux chamber to form a virtuous cycle, and then through the sedimentation chamber, the inert and heavy refractory substances are discharged through the discharge port after precipitation to avoid affecting Degradation effect in an anaerobic digestion reactor.

Description

technical field [0001] The invention relates to the technical field of anaerobic digestion of waste, in particular to a self-sustaining air flotation screening device used in an anaerobic digestion reaction device. Background technique [0002] Anaerobic digestion is a complex chain reaction process consisting of four processes: hydrolysis, acidification, acetogenic / dehydrogenation, and methane production. Each degradation step is completed by different bacterial groups that are interrelated to a certain extent, and The requirements for the environment are different. First, the high molecular weight substances or monomers in the organic matter are firstly utilized by the hydrolytic fermentation bacteria to produce acetic acid, hydrogen, propionic acid, butyric acid and other volatile fatty acids. The accumulation of hydrogen will inhibit the growth of acetic acid bacteria. Therefore, maintaining a low partial pressure of hydrogen is very important for hydrogen-producing acet...

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Problems solved by technology

[0002] Anaerobic digestion is a complex chain reaction process consisting of four processes: hydrolysis, acidification, acetogenic / dehydrogenation, and methane production. Each degradation step is completed by different bacterial groups that are interrelated to a certain extent, and The requirements for the environment are different. First, the high molecular weight substances or monomers in the organic matter are firstly utilized by the hydrolytic fermentation bacteria to produce acetic acid, hydrogen, propionic acid, butyric acid and other volatile fatty acids. The accumulation of hydrogen will inhibit the growth of acetic acid bacteria. Therefore, maintaining a low partial pressure of hydrogen is very important for hydrogen-producing acetogens. The entire anaerobic digestion process can be combined into two major stages of hydrolysis acid production and methane production, and the current anaerobic digestion reactor Finally, the discharge adopts the traditional full-mixing discharge, and the discharge is not completely degraded inert materials, which is not conducive to the degradation effect of the anaerobic digestion reactor. Therefore, the present invention proposes a method for anaerobic digestion reaction Self-sustaining air flotation screening device on the device to solve the problems in the prior art

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