Anaerobic reaction system for treating livestock and poultry breeding sewage or high-concentration organic wastewater

Abstract

The invention discloses an anaerobic reaction system for treating livestock and poultry breeding sewage or high-concentration organic wastewater. The anaerobic reaction system comprises a suspended matter removal, baffling and reaction device, an internal-backflow anaerobic baffling and reaction device, an anaerobic sludge collection device and a sludge concentration tank which are sequentially communicated, wherein the internal-backflow anaerobic baffling and reaction device comprises six reaction separation structures which have the same structure and are communicated in sequence; the first-stage reaction separation structure comprises a first-stage reaction separation chamber in which a second baffle plate is arranged in the longitudinal direction; the second baffle plate divides the first-stage reaction separation chamber into a second descending flow chamber and a second ascending flow chamber of which the lower parts are communicated with each other; a first sewage pump is arranged at the bottom of a descending flow chamber of the third-stage reaction separation structure; an outlet of the first sewage pump is communicated with the second descending flow chamber; a second sewage pump is arranged at the bottom of an ascending flow chamber of the sixth-stage reaction separation structure; and an outlet of the second sewage pump is communicated with a descending flow chamberof the fourth-stage reaction separation structure; the reaction is stable, an additional collecting tank is not needed, and the investment is small.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment and utilization, and in particular relates to an anaerobic reaction system for treating livestock and poultry breeding sewage or high-concentration organic wastewater. Background technique [0002] At present, anaerobic reactors are mainly divided into two types: plug-flow type and complete mixing type. The degradation of organic matter in these two methods is subject to the first-order reaction. The volume ratio of the container is: Among them, η is the removal rate of organic matter, so when η is the same, the reaction volume required by the plug-flow type is smaller than that of the complete mixing type, and the treatment effect of the plug-flow type is better than that of the complete mixing type. [0003] At present, the anaerobic reactor mainly includes CSTR complete mixed anaerobic reactor, UASB upflow anaerobic sludge bed, EGSB anaerobic granular sludge expanded bed, IC internal...

AI Technical Summary

Problems solved by technology

However, for livestock and poultry breeding sewage, it has the characteristics of intermittent discharge and large instantaneous flow rate. Using the traditional ABR anaerobic baffle reactor, adjusting the design parameters such as the aspect ratio of the upflow chamber and the downflow chamber, it is easy to achieve solid waste alone. The function of interception or sludge suspension, because the ABR anaerobic baffle reactor is equivalent to multiple reactors in series, it is difficult to accurately adjust the cross-sectional flow velocity of the upflow chamber, so further improvement is needed on the traditional ABR anaerobic baffle reactor, It can not only complete the removal of high-concentration suspended solids in the early stage, but also anaerobically convert the organic matter in the sewage into biogas, reducing the COD concentration of the effluent

[0009] The current improved ABR anaerobic baffle reactors include: Patent Publication No. CN102001749A discloses that a sump is set at the end of the anaerobic baffle reactor to collect the effluent from the anaerobic baffle reactor and pass the sewage in the sump of the lift pump Return to the front end of the anaerobic baffle reactor according to the ratio of 30% to 100% of the influent water. When the influent flow rate is low, adjust the flow rate of the anaerobic baffle reactor to promote the suspension of anaerobic sludge and improve the anaerobic baffle reactor. The reactor effect is a way of external circulation. Although the efficiency of the anaerobic baffle reactor is improved, the volume of the reactor and the investment cost are increased.

[0010] Invention Patent Publication No. CN202594860 discloses an anaerobic baffled internal circulation reactor, which combines the internal circulation system with baffles to divide the anaerobic chamber into two compartments, the first compartment using three-effect separation The sewage stripper and the solid-liquid separation compartment form an internal cycle of sewage stripping to perform hydrolysis and acidification reactions. The sludge effluent top of the second compartment is similar to the anaerobic method of UASB upflow to produce organic acids produced by the sewage in the first compartment. Methane reaction; however, this method of using the stripping internal circulation is a powerless type. With the acidification of the sewage, the methanogenic bacteria in the first compartment are inhibited when the pH<6, resulting in fluctuations in the gas production. Therefore, this internal circulation unstable

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