CN215559728U - Anaerobic MBR (membrane bioreactor) treatment system - Google Patents
Anaerobic MBR (membrane bioreactor) treatment system Download PDFInfo
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- CN215559728U CN215559728U CN202121921682.1U CN202121921682U CN215559728U CN 215559728 U CN215559728 U CN 215559728U CN 202121921682 U CN202121921682 U CN 202121921682U CN 215559728 U CN215559728 U CN 215559728U
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Abstract
The utility model relates to an anaerobic MBR treatment system. Mainly solves the technical problem that the sludge concentration in the anaerobic reactor is difficult to improve, and the technical scheme of the utility model is as follows: an anaerobic MBR treatment system comprises an anaerobic reactor and is characterized in that an output pipeline of the anaerobic reactor is sequentially connected with a water inlet pump, a circulating pump and an ultrafiltration membrane component, a clear liquid outlet pipeline, a concentrated liquid return pipeline and a residual sludge discharge pipeline are arranged at the tail end of the ultrafiltration membrane component, and the concentrated liquid return pipeline is connected with the anaerobic reactor. The outlet pipeline of the water inlet pump is provided with a basket filter, and the water inlet and the water outlet of the basket filter are provided with a pressure sensor and a pressure gauge. An electromagnetic flowmeter is arranged on the clear liquid outlet pipeline, an electromagnetic flowmeter is arranged on the residual sludge outlet pipeline, and an electromagnetic flowmeter and a pressure sensor are arranged on the circulating pump outlet pipeline. The concentrated solution return line is provided with a branch connected with an outlet pipeline of the water inlet pump. Can improve the processing capacity of the anaerobic reactor, reduce the volume of the reactor and improve the quality of anaerobic effluent.
Description
Technical Field
The utility model relates to an anaerobic reactor, in particular to an anaerobic MBR (membrane bioreactor) treatment system.
Background
The mixing degree, the temperature and the sludge concentration are main factors for the efficient operation of the anaerobic reactor. The EGSB, IC and other reactors are efficient because of good mixing effect and the fact that the separator is arranged in the reactor to retain granular sludge in the reactor. However, for some high salinity and high organic matter wastewater, due to the fact that water quality factors cannot form granular sludge, efficient reactors such as EGSB, IC and the like cannot be applied, and only the traditional CSTR type reactor can be used.
For example, the COD concentration of the slurry after the pretreatment of the kitchen waste wastewater, such as impurity removal, oil extraction and the like is about 150000-. The salinity, SS (suspended solid) and COD (chemical oxygen demand) concentration of the kitchen waste slurry are extremely high, the anaerobic reactor is in a fully mixed form with flocculent sludge as a reaction main body, the anaerobic reactor volume load is only 3-5kgCOD/m for carrying out the year/d in the common kitchen treatment industry, and the organic slurry produced by treating 100t of kitchen waste needs the volume of the anaerobic reactor to be 3000-4000m for carrying out the year.
The amount of sludge in the reactor is critical to the processing capacity while ensuring proper temperature and sufficient agitation. The higher the sludge concentration, the greater its volumetric load, the higher the treatment capacity and the smaller the corresponding reactor volume. In order to ensure the capacity of the reactor, it is very important to maintain a high sludge concentration in the reactor. The anaerobic sludge growth rate is low, and the amount of sludge newly added every day is less than the amount of sludge discharged along with the effluent, so a sludge interception system is needed to maintain the constant amount of sludge in the reactor.
The kitchen anaerobic system has the advantages of fine sludge floc, large biogas output and poor separation effect similar to an EGSB built-in sludge-water separation device, and most of the existing projects are external reflux devices, such as an external reflux device which pumps the sludge back to a reactor after the effluent is precipitated or centrifugally separated.
Practical operation experience shows that the anaerobic flocculent sludge has small particle size, and the separation capacity is limited by a precipitation separation method and gas production interference; the solid content in the filtrate separated by the centrifuge is still 3-4% or even higher, so that on one hand, a large amount of anaerobic sludge enters a rear-end water treatment system to increase the load of a sewage treatment system, and on the other hand, the energy consumption is higher.
MBR is the best mud-water separation technology, and the mud runs off zero, can hold back strain mud in bioreactor completely, generally is used for the mud-water separation of aerobic sewage treatment system terminal.
Disclosure of Invention
The utility model aims to provide a set of anaerobic MBR (membrane bioreactor) treatment system, which solves the technical problem that the sludge concentration in an anaerobic reactor is difficult to improve, thereby improving the treatment capacity of the anaerobic reactor, reducing the volume of the reactor and improving the quality of anaerobic effluent.
The technical scheme of the utility model is as follows: an anaerobic MBR treatment system comprises an anaerobic reactor and is characterized in that an output pipeline of the anaerobic reactor is sequentially connected with a water inlet pump, a circulating pump and an ultrafiltration membrane component, a clear liquid outlet pipeline, a concentrated liquid return pipeline and a residual sludge discharge pipeline are arranged at the tail end of the ultrafiltration membrane component, and the concentrated liquid return pipeline is connected with the anaerobic reactor. The outlet pipeline of the water inlet pump is provided with a basket filter, and the water inlet and the water outlet of the basket filter are provided with a pressure sensor and a pressure gauge. An electromagnetic flowmeter is arranged on the clear liquid outlet pipeline, an electromagnetic flowmeter is arranged on the residual sludge outlet pipeline, and an electromagnetic flowmeter and a pressure sensor are arranged on the circulating pump outlet pipeline. The concentrated solution return line is provided with a branch connected with an outlet pipeline of the water inlet pump.
The utility model has the beneficial effects that: 1. anaerobic digestion liquid is subjected to mud-water separation by virtue of an MBR system, and anaerobic sludge is completely retained in the reactor, so that higher sludge concentration is kept in the reactor, and the volume load and the treatment capacity are improved; 2. the ultrafiltration membrane intercepts undegraded organic particles in the reactor, so that the retention time is prolonged, and the degradation rate of organic matters can be improved; 3. the effluent quality of the anaerobic system is improved, and the rear-end good sample treatment load is reduced; 4. the ultrafiltration membrane component adopts a tubular membrane, and has stronger anti-blocking capability and can bear higher sludge concentration compared with an immersed membrane system.
Drawings
FIG. 1 is a schematic view of the structure of the present invention.
In the figure: 1-an anaerobic reactor, 2-a water inlet pump, 3-a circulating pump, 4-an ultrafiltration membrane component, 5-a clear liquid outlet pipeline, 6-a concentrated liquid return pipeline, 7-a residual sludge discharge pipeline, 8-a basket filter and 9-a branch.
Detailed Description
Referring to fig. 1, an anaerobic MBR treatment system comprises an anaerobic reactor 1, wherein an output pipeline of the anaerobic reactor 1 is sequentially connected with a water inlet pump 2, a circulating pump 3 and an ultrafiltration membrane component 4, a clear liquid outlet pipeline 5, a concentrated liquid return pipeline 6 and a residual sludge discharge pipeline 7 are arranged at the tail end of the ultrafiltration membrane component 4, and the concentrated liquid return pipeline 6 is connected with the anaerobic reactor 1. An outlet pipeline of the water inlet pump 2 is provided with a basket filter 8, and a water inlet and a water outlet of the basket filter 8 are provided with a pressure sensor and a pressure gauge. An electromagnetic flowmeter is arranged on the clear liquid outlet pipeline 5, an electromagnetic flowmeter is arranged on the residual sludge discharge pipeline 7, and an electromagnetic flowmeter and a pressure sensor are arranged on an outlet pipeline of the circulating pump 3. The concentrated solution return line 6 is provided with a branch 9 connected with an outlet pipeline of the water inlet pump.
When the anaerobic digestion liquid separator is used, an ultrafiltration membrane component is adopted to separate sludge and water of the anaerobic digestion liquid. Anaerobic digestion liquid is sent to an ultrafiltration membrane component 4 by a water inlet pump 2, ultrafiltration effluent (clear liquid) enters a subsequent aerobic treatment system, concentrated liquid (mud-water mixture) flows back to an anaerobic reactor 1, residual sludge discharge is realized at the same time, and the residual sludge enters a sludge treatment system.
The membrane separation is divided into microfiltration, ultrafiltration, nanofiltration, reverse osmosis and the like according to different separation particle sizes, and an MBR membrane treatment system for sludge-water separation adopts an ultrafiltration membrane (UF) which is mainly divided into two types, namely a built-in hollow fiber MBR and an external tubular MBR. The present invention employs a tubular MBR.
The principle that a tubular Ultrafiltration (UF) separation system can remove small particles is: the pressurized stock solution passes parallel to the surface of the ultrafiltration membrane, a portion of the water passes through the ultrafiltration membrane, and the trapped particles become more concentrated in the remaining water stream. Since the solution is continuously flowing through, the trapped particles do not settle, but are carried away by the concentrate. Thus, the influent water is divided into two passes after passing through the filter membrane: the solution (permeate) that passes through the membrane and the concentrate that remains.
The water inlet pump 2 distributes the mixed liquid in the anaerobic reactor 1 to the ultrafiltration membrane component 4. The separation particle size of the ultrafiltration membrane is 10-100 nm. The circulation pump provides a required flow velocity (generally 3.5-5m/s) along the inner wall of the membrane tube, so that the mixed liquid forms a turbulent state in the membrane tube, and a larger filtration flux is generated. The activated sludge with high flow rate continuously washes the surface of the membrane, so that a concentration polarization layer is difficult to generate near the surface of the membrane, the blockage of the sludge in a membrane tube is avoided, the ultrafiltration membrane can bear higher sludge concentration due to the characteristic, and engineering examples show that the sludge concentration of the tubular membrane biochemical reactor can reach about 30 g/l.
In order to prevent larger particles from entering the ultrafiltration membrane to damage the membrane, the outlet pipeline of the water inlet pump 2 is provided with a basket filter 8. A pressure sensor (PIC) and a pressure gauge (P) are arranged at the water inlet and the water outlet of the basket filter 8, the differential pressure of the filter is monitored, and when the differential pressure reaches a set value, the filter element needs to be cleaned or replaced.
An electromagnetic flow meter (FIC) is arranged on the clear liquid outlet pipeline 5 to monitor the yield of clear liquid; an electromagnetic flowmeter is arranged on an outlet pipeline of the circulating pump 3 to monitor the circulating flow; residual sludge of the MBR system is discharged from a residual sludge discharge pipeline 7, and an electromagnetic flowmeter is arranged on the residual sludge discharge pipeline 7 to monitor and control the discharge amount of the residual sludge; and a pressure sensor (PIC) is arranged on an outlet pipeline of the circulating pump 3 to monitor the membrane pressure difference. When the membrane pressure difference reaches a set value, the system starts an automatic cleaning program.
By implementing the method, the concentration of the flocculent sludge in the reactor can reach 25g/L, and the volume load reaches 8.5kgCOD/m for carrying out the high-speed cultivation. According to the 100t/d full-material anaerobic treatment system for kitchen waste, the volume of the anaerobic reactor can be reduced to 2400m for high-speed harvest.
Claims (4)
1. An anaerobic MBR treatment system comprises an anaerobic reactor and is characterized in that an output pipeline of the anaerobic reactor is sequentially connected with a water inlet pump, a circulating pump and an ultrafiltration membrane component, a clear liquid outlet pipeline, a concentrated liquid return pipeline and a residual sludge discharge pipeline are arranged at the tail end of the ultrafiltration membrane component, and the concentrated liquid return pipeline is connected with the anaerobic reactor.
2. The anaerobic MBR treatment system of claim 1, wherein: the outlet pipeline of the water inlet pump is provided with a basket filter, and the water inlet and the water outlet of the basket filter are respectively provided with a pressure sensor and a pressure gauge.
3. The anaerobic MBR treatment system of claim 1, wherein: and the clear liquid outlet pipeline is provided with an electromagnetic flowmeter, the residual sludge outlet pipeline is provided with an electromagnetic flowmeter, and the circulating pump outlet pipeline is provided with an electromagnetic flowmeter and a pressure sensor.
4. The anaerobic MBR treatment system of claim 1, wherein: the concentrated solution return line is provided with a branch connected with an outlet pipeline of the water inlet pump.
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| CN202121921682.1U CN215559728U (en) | 2021-08-17 | 2021-08-17 | Anaerobic MBR (membrane bioreactor) treatment system |
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| CN202121921682.1U CN215559728U (en) | 2021-08-17 | 2021-08-17 | Anaerobic MBR (membrane bioreactor) treatment system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115611475A (en) * | 2022-11-07 | 2023-01-17 | 中节能工程技术研究院有限公司 | High-solid-content fully-mixed anaerobic reactor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115611475A (en) * | 2022-11-07 | 2023-01-17 | 中节能工程技术研究院有限公司 | High-solid-content fully-mixed anaerobic reactor |
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Effective date of registration: 20220715 Address after: 201204 Room 302, block B, No. 32, Lane 676, Wuxing Road, Pudong New Area, Shanghai Patentee after: Ruili environmental protection and energy technology (Shanghai) Co.,Ltd. Address before: 201204 Room 302, block B, No. 32, Lane 676, Wuxing Road, Pudong New Area, Shanghai Patentee before: Anheroi environmental protection and energy technology (Shanghai) Co.,Ltd. |