An improved ABR reaction device and start-up method for suppressing acidification

Abstract

The invention provides an improved ABR reaction device for inhibiting an acidification phenomenon, and belongs to the technical field of wastewater treatment process. The improved ABR reaction deviceconsists of 4-6 compartments, each compartment includes an upward flow cell and a downward flow cell, and the ratio of the volume of each upward flow cell to each downward flow cell is (3 to 1) to (5to 1), wherein the upward flow cells are internally provided with suspended filler, and the upper parts and the lower parts of the suspended filler are covered with fixed grid plates. A stirring device is arranged in the first downward flow cell, and a return pipe is arranged in the end compartment. An air guiding pipe is arranged on the upper part of each compartment, and sludge discharging buckets are arranged at the bottoms of the compartments except the first compartment. The suspended filler is tourmaline / polyurethane composite filler, and inhibits the acidification phenomenon during an anaerobic reaction, thereby effectively improving the metabolic activity of anaerobic bacteria such as methanogens, and shortening the startup time of a reactor. Compared with a traditional ABR reaction device, the improved ABR reaction device has uniform water distribution and no dead zone, and can effectively separate suspended matter from influent water, thereby avoiding the influence of the suspended matter on the sludge activity, and being efficient and stable in operation.

Description

technical field [0001] The invention relates to an improved ABR reaction device and a start-up method for suppressing acidification, and belongs to the technical field of wastewater treatment technology. Background technique [0002] In 1979, Bryant et al. further improved the theory of anaerobic digestion on the basis of previous research work, and proposed a three-stage theory, namely: hydrolysis and fermentation stage, hydrogen production and acetic acid production stage, and methane production stage. The theory holds that the anaerobic decomposition of complex organic matter undergoes hydrolysis and fermentation reactions in the first stage; in the second stage, under the action of hydrogen-producing acetogenic bacteria, the fermentation products of the first stage, such as propionic acid, butyric acid, and ethanol, are converted is acetic acid, H 2 and CO 2 ; In the third stage, under the action of methanogens, acetic acid, H 2 and CO 2 further converted to CH 4 . ...

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Problems solved by technology

Agitators are installed at the bottom of the flow cell under the first compartment of the ABR reactor, and sludge hoppers are installed at the bottom of the other compartments except for the first compartment to solve the problem of uneven influent water quality and the influence of suspended solids (SS) in the reactor on sludge activity ;The tourmaline / polyurethane composite filler is filled in the ABR reaction device, which solves the problems of easy acidification in the hydrolytic acidification section, inhibition of methanogens, slow growth of anaerobic microorganisms, and long anaerobic start-up time.

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