CN216946415U

CN216946415U - Novel anaerobic bioreactor with built-in conductive iron material

Info

Publication number: CN216946415U
Application number: CN202123372349.2U
Authority: CN
Inventors: 王先宝; 谢怡俐; 冉家荣; 张敏婷; 宋白莎; 王强; 张安龙
Original assignee: Shaanxi University of Science and Technology
Current assignee: Shaanxi University of Science and Technology
Priority date: 2021-12-29
Filing date: 2021-12-29
Publication date: 2022-07-12
Anticipated expiration: 2031-12-29

Abstract

The utility model discloses a novel anaerobic bioreactor with a built-in conductive iron material, which comprises a granular sludge bed area and a suspended sludge layer area which are sequentially arranged from bottom to top, wherein the conductive iron material is arranged in the granular sludge bed area and the suspended sludge layer area, the top of the suspended sludge layer area is provided with a three-phase separation area, the three-phase separation area comprises a lower settling area and an upper water collecting tank, the center of the settling area is provided with a gas collecting hood, the top of the gas collecting hood is communicated with an exhaust pipe, the water collecting tank is communicated with a water outlet pipe, and the bottom of the granular sludge bed area is communicated with a water inlet pipe. The utility model can improve the treatment efficiency in the anaerobic treatment stage, reduce the treatment load of the aerobic section and the advanced treatment section, reduce the operation cost and improve the effluent quality.

Description

Novel anaerobic bioreactor with built-in conductive iron material

Technical Field

The utility model relates to the technical field of sewage treatment, in particular to a novel anaerobic bioreactor with a built-in conductive iron material.

Background

The anaerobic bioreactor is a common treatment unit in a sewage treatment process, and a common high-efficiency anaerobic reactor is an upflow anaerobic sludge bed reactor UASB), an internal circulation anaerobic reactor IC, an expanded granular sludge bed reactor EGSB and the like. The anaerobic reactor utilizes microorganisms on the surface of the built-in granular sludge to carry out anaerobic digestion, so that organic matters in sewage are removed, a large amount of methane is generated, then a three-phase separator is utilized to realize gas-liquid-solid three-phase separation, effluent is clarified, the methane is collected, and the granular sludge returns to the reactor. The anaerobic treatment process has the advantages of low energy consumption, high load, small occupied area, wide application range and the like. Therefore, the anaerobic bioreactor has wide application in the field of sewage treatment.

The traditional anaerobic digestion process comprises hydrolysis acidification stage hydrolysis, acidogenic fermentation, hydrogen production and acetogenesis stage and methanogenesis stage, and can be successfully completed under the synergistic action of two major microorganisms, i.e. hydrolysis acidification bacteria and methanogenesis bacteria. The traditional anaerobic reactor is low in running conformity, and for high load, the mismatching of the metabolic capability of acid-producing bacteria and the methanogenic bacteria capability can cause acid accumulation and inhibit the methanogenic bacteria activity, thereby causing the collapse of the anaerobic reactor.

An electron transfer process exists between the hydrolytic acidification bacteria and the methanogen, the electron transfer rate between microorganisms is improved, the anaerobic digestion performance can be improved, and the treatment efficiency in the anaerobic treatment stage is improved. The efficiency improvement of the anaerobic treatment stage can reduce the load of the aerobic section and the advanced treatment section, reduce the process operation cost and improve the effluent quality. Researches show that the iron material has the capability of promoting the electron transfer among microbial species, so a novel anaerobic bioreactor with a built-in conductive iron material is developed.

Disclosure of Invention

In order to overcome the defects of the prior art, the utility model aims to provide a novel anaerobic bioreactor with a built-in conductive iron material, which can improve the treatment efficiency in an anaerobic treatment stage, reduce the treatment load of an aerobic section and an advanced treatment section, reduce the operation cost and improve the effluent quality.

In order to achieve the purpose, the utility model adopts the technical scheme that:

the utility model provides a novel anaerobism bioreactor of built-in electrically conductive iron material, includes by lower supreme granular sludge bed district 2 and the suspension sludge blanket district 4 that sets gradually, granular sludge bed district 2 and the inside electrically conductive iron material 3 that is provided with of suspension sludge blanket district 4, suspension sludge blanket district 4 top is provided with three-phase separation district 5, and three-phase separation district 5 includes the precipitation zone 7 of below and the water catch bowl 10 of top, and precipitation zone 7 center department is provided with gas collecting channel 6, and gas collecting channel 6 top intercommunication blast pipe 8, and the intercommunication has outlet pipe 9 on the water catch bowl 10, and granular sludge bed district 2 bottoms intercommunication has inlet tube 1.

The gas-collecting hood 6 is positioned in the settling zone 7 and is arranged at the middle lower part of the settling zone 7, and the water collecting tank 10 is positioned at the upper part of the settling zone 7.

The lower end of the conductive iron material 3 is 11-2 meters higher than the water inlet pipe, the upper end is lower than the top of the suspended sludge layer area 4, and the length is about 1/2-2/3 of the height of the granular sludge bed area 2 and the suspended sludge layer area 4.

The conductive iron material 3 is cylindrical, and the diameter of the bottom circle is 2-5 cm.

The conductive iron materials 3 are arranged in a plurality, the distance is set to be 20-50cm, the distance is far larger than the particle size of the granular sludge, and the granular sludge can be prevented from being blocked in gaps of the conductive iron materials.

The filling rate of the conductive iron material 3 in the anaerobic bioreactor is 2-5%.

The utility model has the beneficial effects that:

in the utility model, sewage firstly enters an anaerobic bioreactor through a water inlet pipe and flows upwards through a granular sludge bed area and a suspended sludge layer area, anaerobic digestion bacteria such as hydrolytic acidification bacteria, methanogens and the like are enriched on the surface of granular sludge in the sludge area, the inter-species electron transfer function of the microorganisms is enhanced under the action of a conductive iron material, the removal rate of organic matters is accelerated under the synergistic action of the hydrolytic acidification bacteria and the methanogens, and the sewage is purified. The device is a novel anaerobic bioreactor with a built-in conductive iron material, and the conductive iron material is arranged in a reaction area of the anaerobic bioreactor, so that the transfer capability of electrons between anaerobic digestion microorganism species is promoted, the anaerobic digestion efficiency is improved, the load of a subsequent aerobic section and a deep treatment section is reduced, and the operation cost is reduced.

Drawings

FIG. 1 is a schematic view of the structure of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in figure 1, the device mainly comprises a water inlet pipe 1, a granular sludge bed area 2, a conductive iron material 3, a suspended sludge layer area 4, a three-phase separation area 5, a water outlet pipe 9 and an exhaust pipe 8. The three-phase separation area 5 consists of a gas-collecting hood 6, a settling area 7 and a water-collecting tank 10. The water inlet pipe 1 is positioned at the bottom end of the device, the exhaust pipe 8 is positioned at the top end of the device, and the water outlet pipe 9 is connected with the water collecting tank 10. The conductive iron material 3 is positioned in the granular sludge bed area 2 and the suspended sludge layer area 3, the lower end of the conductive iron material is higher than the water inlet pipe by 11-2 meters, the upper end of the conductive iron material is lower than the top of the suspended sludge layer area 4, the length of the conductive iron material is about 1/2-2/3 of the anaerobic sludge reactor reaction area, the distance is set to be 20-50cm, the conductive iron material is far larger than the granular sludge particle size, and the granular sludge can be prevented from being blocked in gaps of the conductive iron material. The shape of the conductive iron material 3 is cylindrical, the diameter of the bottom circle is 2-5cm, and the filling rate in the anaerobic bioreactor is 2% -5%.

Sewage enters the device from the bottom of the reactor through the water inlet pipe 1 and flows upwards through the granular sludge bed area 2 and the suspended sludge layer area 4, granular sludge is filled in the granular sludge bed area 2 and the suspended sludge layer area 4, microorganisms required by the anaerobic digestion process are enriched on the surface of the granular sludge, when the sewage flows through the granular sludge bed area, the anaerobic digestion process is completed under the synergistic action of hydrolytic acidification bacteria and methanogen, and the sewage is purified. The device is provided with the conductive iron material 3 in the granular sludge bed area 2 and the suspended sludge layer area 4, when sewage flows through the area, under the action of the conductive iron material 3, the electron transfer rate between anaerobic digestion microorganism hydrolysis acidification bacteria and methanogen is accelerated, the degradation of organic matters in the sewage is accelerated, the sewage is purified, and a large amount of methane is generated. The mixture of the granular sludge, the sewage and the methane flows upwards through the three-phase separation area 5 to realize gas-liquid-solid three-phase separation, the methane enters the gas collecting hood 6 and is discharged through the exhaust pipe 8, the clear water enters the water collecting tank 10 and is discharged through the water outlet pipe 9 and enters the next treatment unit, and the granular sludge is precipitated in the precipitation area 7 and then returns to the reactor.

Claims

1. The utility model provides a novel anaerobism bioreactor of built-in electrically conductive iron material which characterized in that, includes by lower supreme granule sludge blanket district (2) and suspension sludge blanket district (4) that set gradually, and granule sludge blanket district (2) and suspension sludge blanket district (4) are inside to be provided with electrically conductive iron material (3), suspension sludge blanket district (4) top is provided with three-phase separation district (5), and three-phase separation district (5) are provided with water catch bowl (10) of sedimentation zone (7) and top of below including, and sedimentation zone (7) center department is provided with gas collecting channel (6), and gas collecting channel (6) top intercommunication blast pipe (8), intercommunication have outlet pipe (9) on water catch bowl (10), and granule sludge blanket district (2) bottom intercommunication has inlet tube (1).

2. The novel anaerobic bioreactor with built-in conductive iron material as claimed in claim 1, wherein the lower end of the conductive iron material (3) is 1-2 meters higher than the water inlet pipe (1), the upper end is lower than the top of the suspended sludge layer (4), and the length is 1/2-2/3 of the height of the granular sludge bed region (2) and the suspended sludge layer region (4).

3. The novel anaerobic bioreactor with built-in conductive iron material as claimed in claim 1, wherein the conductive iron material (3) is cylindrical in shape, and the diameter of the bottom circle is 2-5 cm.

4. The novel anaerobic bioreactor with built-in conductive iron material as claimed in claim 1, wherein the conductive iron material (3) is provided in plurality, and the distance between the conductive iron material and the conductive iron material is 20-50cm, which is much larger than the particle size of the granular sludge.

5. The novel anaerobic bioreactor with built-in conductive iron material as claimed in claim 1, wherein the conductive iron material (3) has a filling rate of 2% -5% in the anaerobic bioreactor.

6. The new anaerobic bioreactor with built-in conductive iron material as claimed in claim 1, wherein the gas-collecting hood (6) is located in the settling zone (7) and is located at the middle-lower part of the settling zone (7), and the water-collecting tank (10) is located at the upper part of the settling zone (7).