CN202046977U - Anaerobic-aerobic integrated reactor - Google Patents

Abstract

The utility model discloses an anaerobic-aerobic integrated reactor, which belongs to a sewage treatment device. Including the shell, the inner cavity of the shell is divided into two chambers with a partition, one is the anaerobic baffle reactor ABR, and the other is the aerated biological filter reactor BAF, and the anaerobic reactor is connected through a connecting pipe between the two chambers. The baffle reactor ABR and the biological aerated filter reactor BAF are connected to form a whole; the two ends of the connecting pipe are respectively connected to the upper parts of the anaerobic baffle reactor ABR and the biological aerated filter reactor BAF. The beneficial effect is that the integrated reactor has the advantages of simple structure, convenient management, high treatment efficiency, long contact time, good effluent quality, small occupied area, and reduced engineering investment.

Description

Anaerobic-aerobic integrated reactor

technical field

The utility model relates to a sewage treatment device, in particular to an anaerobic-aerobic integrated reactor. It is mainly suitable for treating various organic wastewater, especially high-concentration organic wastewater.

Background technique

At present, anaerobic or aerobic methods are often used in the biological treatment of organic wastewater. Compared with aerobic methods, anaerobic treatment has many advantages, such as low sludge yield, low energy consumption, and recyclable biogas. However, there are various problems or defects in the commonly used anaerobic biological treatment methods. For example, the most widely used upflow anaerobic sludge bed (UASB) requires a complicated three-phase separator, and it is difficult to obtain a solid waste under low temperature conditions or at the beginning of start-up or when the treatment process is low. The treatment efficiency is low when the concentration of organic wastewater is high.

Anaerobic Baffled Reactor (ABR) is a high-efficiency anaerobic reactor developed in the 1980s. ABR is a high-efficiency new reactor composed of multiple compartments. The structure of the chamber, the sewage flows through each compartment in turn to be degraded, each compartment of the reactor has an anaerobic sludge layer, its function is similar to that of the UASB reaction zone, the difference is that the ABR reactor does not have a three-phase separator. The process has the advantages of strong biological interception capacity, convenient operation and management, and reliable performance. However, as a kind of anaerobic biological treatment process, the ABR reactor has the commonality of anaerobic biological treatment, that is, although it has a high treatment rate for organic matter, the effluent of the reactor still contains a large amount of organic matter, and the effluent cannot meet the discharge standard. It is often necessary to add aerobic treatment after the anaerobic reactor to further remove the organic matter in the effluent of the anaerobic reactor.

Biological aerated filter (BAF) is an aerobic sewage treatment process that emerged in the early 1990s. It has the characteristics of integrating biological oxidation and intercepting suspended solids, saves subsequent sedimentation tanks, and has high volume load and short hydraulic retention time. , less investment in infrastructure, and high quality of effluent water.

The anaerobic-aerobic combined process is commonly used in engineering to treat organic wastewater, but the current anaerobic-aerobic combined process is often two separate sets of equipment, which requires a large investment and land occupation, and the anaerobic reactor and good Oxygen reactors generally adopt direct coupling, which makes the equipment prone to short flow and affects the treatment effect.

Contents of the invention

In order to solve the above-mentioned problems and defects of anaerobic-aerobic combined process equipment, the utility model provides an anaerobic-aerobic integrated reactor, which is an integrated reactor for treating sewage with ABR reactor and BAF reactor. The device is an integrated reactor with simple structure, convenient management, high treatment efficiency, long contact time, good effluent quality, small footprint, and reduced engineering investment.

The utility model is realized by adopting the following technical scheme: an anaerobic-aerobic integrated reactor, including a shell, the inner cavity of the shell is divided into two chambers by a partition, one is an anaerobic anaerobic baffle plate reaction The other is the biological aerated filter reactor BAF, and the anaerobic baffle reactor ABR and the biological aerated filter reactor BAF are connected through a connecting pipe to form a whole; the two connecting pipes The ends are respectively connected to the upper part of the anaerobic baffle reactor ABR and the biological aerated filter reactor BAF.

The pretreated sewage enters the ABR reactor in the anaerobic section, where anaerobic reaction occurs, and the concentration of organic matter in the sewage is greatly reduced through the degradation of anaerobic bacteria. After anaerobic treatment, the sewage enters the top of the BAF reactor through the connection device. The sewage flows from top to bottom, and is oxygenated through the BAF reactor to provide oxygen for aerobic bacteria. The aerobic microorganisms decompose the remaining organic matter in the sewage, making the The concentration of pollutants in the sewage is further reduced and meets the discharge requirements.

The beneficial effects of the utility model are:

1. The utility model combines the anaerobic reactor and the aerobic reactor into one, and the reactor has a compact and simple structure, which reduces the cost and volume;

2. Under anaerobic-aerobic conditions, it can efficiently remove high-concentration organic wastewater, and the amount of residual sludge is small, which can save sludge sedimentation tanks and residual sludge treatment steps, saving infrastructure costs and operating costs;

3. The anaerobic baffle reactor is adopted. The vertical baffles arranged in the reactor not only play the role of mixing and stirring, but also increase the contact time between anaerobic sludge and sewage, and improve the treatment effect.

4. The utility model adopts the combined treatment process of ABR+BAF, which can treat high-concentration organic wastewater with good treatment effect and can effectively ensure the quality of effluent.

Description of drawings

Fig. 1 is a schematic cross-sectional structure diagram of an anaerobic-aerobic integrated reactor of the present invention.

Fig. 2 is a schematic plan view of the anaerobic-aerobic integrated reactor of the present invention.

In the figure: 1. Water inlet pipe, 2. Biogas collection device, 3. Connecting pipe, 4. Control valve, 5. Backwash outlet pipe, 6. Packing layer, 7. Supporting layer, 8. Aeration device, 9. Outlet and backwash inlet pipes, 10, partition plate, 11, baffle plate, 12, anaerobic baffle plate reactor ABR, 13, biological aerated filter reactor BAF, 14, shell.

Detailed ways

As shown in Figure 1 and Figure 2, the utility model includes a housing 14, the housing 14 is rectangular, and its inner cavity is divided into two chambers with a partition, one is the anaerobic baffle reactor ABR12, and the other is the exposure chamber. Gas biological filter reactor BAF13, the anaerobic baffle reactor ABR12 and the biological aerated filter reactor BAF13 are connected through the connecting pipe 3 to form a whole; the two ends of the connecting pipe 3 are respectively connected to the anaerobic The upper part of oxygen baffle reactor ABR12 and biological aerated filter reactor BAF13.

In the anaerobic baffle reactor ABR 12 reactor, be provided with 3-5 dividing plates 10 and the corresponding baffles 11 of quantity, present embodiment establishes 3 dividing plates 10 and anaerobic baffled reactor Divided into 4 compartments. The partition plate and the baffle plate are installed vertically and welded on the shell 14 of the reactor. There is a water inlet 1 on one side of the reactor and a biogas outlet pipe on the top. A biogas collection device 2 is also installed above the anaerobic baffle reactor ABR 12.

An aeration device 8 is installed in the biological aerated filter reactor BAF13, and a supporting layer 7 and a packing layer 6 are installed in sequence from bottom to top. In this embodiment, the aeration device 8 is installed at the bottom. Water outlet and backwashing water inlet pipe 9 are arranged by the bottom, and the backwashing water outlet pipe 5 and the control valve 4 controlling the backwashing water outlet pipe are arranged on the top.

The sewage treatment process is as follows: the pretreated sewage enters the ABR reactor in the anaerobic section from the inlet pipe 1, and the sewage flows through the four-compartment ABR reactor in turn, and anaerobic reaction occurs at this stage, and it is degraded by anaerobic bacteria. The concentration of organic matter in the sewage is greatly reduced. After anaerobic treatment, the sewage enters the top of the BAF reactor through the connecting pipe 3, and the sewage flows from top to bottom, and oxygenates the BAF reactor in the aerobic section through the aeration and oxygenation device 8 to provide oxygen for the aerobic bacteria. , the aerobic microorganisms attached to the filler decompose the remaining organic matter in the sewage, so that the concentration of pollutants in the water is further reduced, and the discharge requirements are met, and the water is discharged through the outlet pipe 9; when the thickness of the biofilm on the filler is too thick, it can be carried out For backwashing, at first the water inlet pipe 1 stops the water intake, and the control valve 4 is opened, the backwashing water inlet pipe 9 is fed with water for backwashing, and the backwashing water is discharged from the backwashing outlet pipe 5. The overall shape of the anaerobic-aerobic integrated reactor is rectangular.

Claims (4)

1. An anaerobic-aerobic integrated reactor is characterized in that it comprises a housing (14), and the inner cavity of the housing (14) is divided into two chambers with a partition, and one is an anaerobic baffle reactor ABR (12), the other is the biological aerated filter reactor BAF (13), the anaerobic baffle reactor ABR (12) and the biological aerated filter reactor BAF are connected through the connecting pipe (3) in the middle of the two (13) connected to form a whole; the two ends of the connecting pipe (3) are respectively connected to the upper part of the anaerobic baffle reactor ABR (12) and the biological aerated filter reactor BAF (13). 2. the anaerobic-aerobic integrated reactor according to claim 1 is characterized in that described anaerobic baffle reactor ABR (12) is provided with 3-5 dividing plates ( 10) The baffles (11) corresponding to the quantity, the dividing plate (10) and the baffles (11) are vertically installed, welded on the shell of the reactor, and a water inlet (1) is arranged on one side of the reactor ), there is a biogas outlet pipe on the upper part. 3. The anaerobic-aerobic integrated reactor according to claim 1, characterized in that an aeration device (8) is installed in the described biological aerated filter reactor BAF (13), sequentially from bottom to top The device has a supporting layer (7) and a packing layer (6). 4. The anaerobic-aerobic integrated reactor according to claim 1, characterized in that a biogas collection device (2) is also installed above the anaerobic baffle reactor ABR (12).