CN204490586U - From interception type aerobic reactor - Google Patents

Abstract

The self-retaining aerobic reactor relates to the field of sewage treatment, and is a new type of aerobic reactor device, which is used in the biochemical treatment of sewage and has the characteristics of high sludge concentration and long sludge residence time. The self-retaining aerobic reactor is mainly composed of two parts: the reaction zone and the sedimentation zone. Aeration is carried out at the bottom of the water inlet of the reaction zone to form a circulation. The sewage containing sludge enters the sedimentation zone from the bottom, and the gravity of the sludge and sewage is used to carry out the process. Separation of mud and water. The settled sludge enters the reaction zone.

Description

self-entrapment aerobic reactor

technical field

The utility model relates to sewage treatment, especially the treatment of aerobic microorganisms. The aerobic reactor is combined with a vertical flow sedimentation tank to complete the reaction in one device. Ensure that the reactor has a high sludge residence time and sludge concentration.

Background technique

At present, the existing mature aerobic treatment processes or systems, such as aerobic tanks, cannot separate the sludge retention time from the hydraulic retention time, while the contact oxidation tank and the biological turntable can separate the sludge retention time from the hydraulic retention time. The time is separated, but the secondary sedimentation tank needs to be connected behind the reactor, which increases the investment cost of the project. The invention of the reactor is to realize the problem of mud-water separation in one reactor, and the aerobic reaction zone and the sedimentation zone are combined. Construction, reduce investment, ensure a higher sludge residence time and sludge concentration.

Contents of the invention

In order to separate the sludge retention time from the hydraulic retention time in one reactor, a loop is formed in the reaction zone of the self-retaining reactor by controlling its hydraulic conditions. Sewage enters the aerobic reaction zone from the upper end of the reactor, and is aerated at the lower part of the water inlet to allow the sewage to fully mix and react with the sludge in the reaction section. After the separation of mud and water, the effluent flows out through the weir, while the sludge settles on the sloping plate and flows back into the aerobic reaction section by its own gravity.

The technical solution adopted for the technical problem solved by the utility model: the aeration device and the water inlet device are arranged at the same end, and the aeration device forms a circulation in the reactor when aerating and oxygenating the reactor, on the one hand The sewage is fully mixed with the sludge and oxygen, and on the other hand, it can ensure that the mud-water mixture enters the sedimentation section of the reactor from the lower end after fully reacting in the reaction section. In order to allow the sludge settled on the sloping plate to flow back into the reaction section, the sloping plate must maintain an inclination angle of 45 degrees to 60 degrees, and keep its inner surface relatively smooth.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Fig. 1 is the front view of the self-trapping aerobic reactor of the present utility model.

Fig. 2 is a water flow state diagram of the utility model self-retaining aerobic reactor.

In the figure: 1. water inlet; 2. aerator; 3. reaction section; 4. water outlet; 5. sedimentation section; 6. outlet weir; 7. inclined plate.

Detailed ways

Through the use of this utility model, the hydraulic retention time in the reactor can be separated from the sludge retention time, so as to ensure a relatively high sludge concentration in the reactor and improve the sewage treatment efficiency of the entire reactor.

Below in conjunction with accompanying drawing, describe the concrete scheme of utility model in detail:

The sewage to be treated first flows into the reaction section (3) through the water inlet pipe (1), and is aerated by the aeration device (2) arranged at the same end as the water inlet pipe (1), and the sludge and sewage are completed in the reaction section (3). , the mixing of oxygen, so that the pollutants in the water are consumed by microorganisms, and the mud-water mixture forms a circulation in the reaction section, and enters the sedimentation section (5) from the water inlet at the lower part of the other end of the reactor, and the sludge in the sedimentation section Separation from the treated sewage, the treated sewage escapes from the outlet weir (6) and enters the next reactor, while the sludge settled in the sedimentation section (5) gathers in the sedimentation section (5) On the sloping plate (7) in the middle and lower part, when the sludge accumulates to a certain amount on the sloping plate, it will flow back into the reaction section (3) by its own gravity to ensure the sludge concentration in the reaction section.

Claims (4)

1. The self-retaining aerobic reactor is characterized in that it comprises the following steps: sewage flows into the reactor from the water inlet (1), the aeration device (2) positioned at the bottom of the reactor aerates downward, and the whole sewage is in the reaction section Circulation is formed in (3), and the sewage and the microorganisms in the reactor are fully mixed and reacted. After the reaction, the mud-water mixture enters the (5) sedimentation section through the (4) outlet for mud-water separation, and the separated sewage enters (6) the outlet weir , while the separated sludge settles on (7) sloping plate. 2. The self-retaining aerobic reactor according to claim 1, characterized in that, the water inlet (1) and the aeration device (2) are located at the same end, and aeration is performed at one end of the reactor, and in the entire reaction section Form a circulation. 3. The self-retaining aerobic reactor according to claim 1, characterized in that the fully mixed mud-water mixture enters the sedimentation zone from the lower part, and sedimentation is carried out by using the sedimentation speed of the sludge particles to be greater than the rising speed of the water flow. 4. The self-retaining aerobic reactor according to claim 1, characterized in that the inclined plate (7) has a certain angle, the angle is between 45 degrees and 60 degrees, and the inside wall remains smooth, so that The sludge deposited on it can be returned to the reaction section.