Aerated aerobic and aerobic biofilm digestion reaction device and method

Abstract

The invention discloses an aeration aerobic facultative biomembrane digestion reaction apparatus and a method thereof. The apparatus comprises a facultative tank, a digestion reaction tower and a foam treatment device. A water distributor, an aeration device, a biomembrane carrier packing layer and a backflow tube are arranged in the tower body of the digestion reaction tower, the water distributor and the water outlet of the tower body are respectively positioned at the two vertical sides of the packing layer, and the backflow tube penetrates through the packing layer. The packing layer contacts and reacts with aeration bubbles, the biomembrane of the packing layer absorbs oxygen and digests organic matters in sewage to form aerobic sludge, the aerobic sludge precipitates to the bottom of the tower through the backflow tube, the precipitated sludge can be cleaned out, and oxygen in the bubbles are dissolved in the sewage to realize an oxidation effect. The aeration bubbles contact and adsorb suspensions in the sewage under the shearing action of the packing layer, the suspensions rise with the bubbles and float out of the water surface to form foams, and the foams are collected and are processed through the foam treatment device. Sewage flows back to the facultative tank through the water outlet, and undergoes a facultative reaction and a denitrification reaction in order to degrade ammonia nitrogen and COD in the sewage.

Description

technical field [0001] The invention relates to an aerated aerobic and aerobic biofilm digestion reaction device and method. Background technique [0002] Aerobic aeration is the most commonly used, most extensive and effective method in the process of biological treatment of sewage. Due to the historical evolution and development of this method, the method of directly installing an aeration device in the aerobic tank for aeration and oxygenation has been used in practical applications, and sufficient aeration and oxygenation are obtained in the aeration tank. Make the dissolved oxygen in the sewage rise to the index value (2mg / L) required by the process. Then let the sewage flow into another anoxic pool (anoxic pool) to reduce the dissolved oxygen due to dilution, and be in an anoxic state. Through the digestion of aerobic bacteria, the organic matter in the sewage is converted into aerobic sludge form and removed, and through the alternating action of nitrification of ae...

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Problems solved by technology

[0004] 1. Directly aerate in the pool. A large amount of foam generated during the aeration process cannot be removed or re-entered into the pool or overflows, causing secondary pollution to the environment. At the same time, a large amount of suspended solids return to the sewage (COD), which is not obtained. Effective removal not only wastes a lot of energy (the aeration process will naturally produce a lot of foam, but it is considered a waste if not removed), and affects the environment

[0005] 2. A large amount of sludge generated during the aeration process is likely to block the aeration holes of the aeration head due to settlement and cause the aeration head to fail

[0006] 3. The aeration device (aeration pipe and aeration head) is installed in the middle or bottom of the pool, which is difficult to repair and maintain (the whole pool of sewage should be emptied during maintenance, and a spare pool is required for turnover when emptying the sewage

[0007] 4. The distance between the aerator head and the water surface is limited, so that the oxygen conduction efficiency is not high

Difficulties in implementation when the land area is in short supply

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