CN217479267U - External anaerobic tubular membrane bioreactor wastewater treatment system - Google Patents

Abstract

An external anaerobic tubular membrane bioreactor wastewater treatment system, comprising: the anaerobic reactor is used for carrying out anaerobic fermentation on the sewage and is connected with a water outlet pipeline and a concentrated water pipeline; the tubular membrane component is connected with the water outlet pipeline and the sewage pipeline and is used for receiving the water outlet of the anaerobic reactor through the water outlet pipeline, filtering the water outlet and returning the filtered concentrated water to the anaerobic reactor through the concentrated water pipeline, and the water outlet pipeline is also provided with a pressure pump for improving the flow rate of the water outlet; the chemical cleaning tank is connected with the tubular membrane component through a chemical agent pipeline and a return pipeline and is used for cleaning the tubular membrane component by using a chemical agent; and the washing tank is connected with the tubular membrane component through a water supply pipeline and a water return pipeline, and is used for washing the tubular membrane component by using clean water and receiving washing return water through the water return pipeline. The system solves the problem of sludge loss of the anaerobic reactor and improves the flushing effect of the tubular membrane.

Description

External anaerobic tubular membrane bioreactor wastewater treatment system

Technical Field

The utility model relates to a waste treatment technical field, specifically, the utility model relates to an external anaerobism tubular membrane bioreactor effluent disposal system.

Background

With the rapid development of economy, the domestic sewage yield is huge, and if various types of sewage can be treated to generate recyclable resources, the method is a considerable energy recovery way. Therefore, it is very important to select proper process flow to treat the sewage and convert the chemical binding energy of the organic matters into recyclable energy.

The anaerobic biological treatment technology can not only produce methane which can recycle energy, but also reduce the operating cost of sewage plants because the anaerobic environment is required to be free from aeration in the reaction process, so the anaerobic biological treatment technology is popular in more sewage plants because of the advantage. Membrane separation technology has also received increasing attention from the water treatment industry as a separation technology that is easy to operate and has high efficiency. Anaerobic membrane bioreactors (AnMBR) effectively combine anaerobic biological treatment technology with membrane separation technology, and are one of the most promising water treatment technologies. The membrane bioreactor has the specific advantages that the membrane separation technology effectively intercepts the activated sludge in the reactor, so that microorganisms with long generation cycle can be reserved, the stable high-quality effluent quality is ensured, two parameters of Hydraulic Retention Time (HRT) and Sludge Retention Time (SRT) of the membrane bioreactor are independently controlled, and the small occupied area reduces the civil engineering cost of a sewage treatment plant, so that the membrane bioreactor is more and more commonly applied to sewage treatment plants for treating various kinds of sewage. However, the prior anaerobic membrane bioreactor has the problems of poor effluent quality of the anaerobic reactor, easy pollution on the surface of a membrane tube, low membrane flux and the like.

SUMMERY OF THE UTILITY MODEL

In the summary section a series of concepts in a simplified form is introduced, which will be described in further detail in the detailed description section. The inventive content of the present application does not imply any attempt to define the essential features and characteristics of the claimed solution, nor does it imply any attempt to determine the scope of the claimed solution.

To the deficiency of the prior art, the utility model provides an external anaerobism tubular membrane bioreactor effluent disposal system on the one hand, this external anaerobism tubular membrane bioreactor effluent disposal system includes:

the anaerobic reactor is used for acquiring sewage to be treated and carrying out anaerobic fermentation on the sewage, and the anaerobic reactor is connected with a water outlet pipeline and a concentrated water pipeline;

the tubular membrane assembly is connected with the water outlet pipeline and the sewage pipeline and is used for receiving the outlet water of the anaerobic reactor through the water outlet pipeline so as to filter the outlet water and returning the filtered concentrated water to the anaerobic reactor through the concentrated water pipeline, and a pressure pump is also arranged on the water outlet pipeline and is used for pressurizing the outlet water;

the chemical cleaning tank is connected with the tubular membrane assembly through a chemical agent pipeline and a return pipeline and is used for cleaning the tubular membrane assembly by using a chemical agent, a chemical cleaning pump is arranged on the chemical agent pipeline and is used for conveying the chemical agent to the tubular membrane assembly, and the return pipeline is used for receiving and cleaning return chemicals;

the washing tank is connected with the tubular membrane component through a water supply pipeline and a water return pipeline and used for washing the tubular membrane component by using clear water, a washing pump is arranged on the water supply pipeline and used for conveying the clear water to the tubular membrane component, and the water return pipeline is used for receiving washing return water.

In one embodiment, the system further comprises a methane tank connected to the anaerobic reactor through a methane pipeline, and methane generated by the anaerobic reactor enters the methane tank through the methane pipeline.

In one embodiment, a water-sealed tank is arranged on the biogas pipeline.

In one embodiment, the system further comprises a steam mixer, the anaerobic reactor is connected with the steam mixer, the steam mixer is connected with a steam source and a sewage feeding pump, and the steam mixer is used for mixing steam provided by the steam source and sewage provided by the sewage feeding pump.

In one embodiment, the outlet pipeline is further provided with a filter for filtering large-particle impurities in the outlet water, and the filter is arranged at the front end of the pressurizing pump.

In one embodiment, a circulation branch is further arranged on the concentrated water pipeline, and the circulation branch is connected with the chemical cleaning tank and used for enabling clean water provided by the flushing pipe to flow through the chemical cleaning tank.

In one embodiment, the system further comprises a chemical tank connected to the chemical wash tank for providing chemical to the chemical wash tank.

In one embodiment, the system further comprises a controller for controlling the pressurization pump, the chemical cleaning pump, and the rinse pump.

In one embodiment, the anaerobic reactor, the flushing tank and the chemical cleaning tank are provided with a remote liquid level meter and a remote temperature meter which are in communication connection with the controller.

In one embodiment, the water outlet pipeline is provided with a remote temperature meter, a remote flow meter and a remote pressure meter which are in communication connection with the controller.

In one embodiment, the tubular membrane module is connected with a water production pipeline for leading out the filtered water, and a remote flowmeter which is in communication connection with the controller is arranged on the water production pipeline; and the concentrated water pipeline is provided with a remote transmission pressure gauge in communication connection with the controller.

In one embodiment, a sludge outlet is arranged at the bottom of the anaerobic reactor, the sludge outlet is connected with a sewage pipeline for discharging sludge deposited at the bottom of the anaerobic reactor, a sludge pump and a flow meter are arranged on the sewage pipeline, and the flow meter is arranged at the front end of the sludge pump.

The external anaerobic tubular membrane bioreactor wastewater treatment system provided by the embodiment of the utility model adopts the external tubular membrane, effectively improves the solid-liquid separation effect of the anaerobic reactor through the interception effect of the membrane, and solves the problem of poor effluent quality of the single anaerobic reactor; microorganisms are trapped in the anaerobic reactor through the tubular membrane, so that the problem of sludge loss commonly occurring in the conventional anaerobic system is solved, the stability of microorganism populations is improved, and the anaerobic organic load and the biogas yield are greatly improved; the chemical cleaning unit and the flushing unit are arranged, so that the inner surface pollution effect of the membrane tube is improved, the flushing efficiency is improved, the running period of the membrane system can be prolonged, and a series of problems of short limited running time, short service life and the like caused by accelerated membrane pollution are solved; compared with a flat membrane, a spiral membrane and a hollow fiber membrane, the anaerobic effluent is treated by the external tubular membrane, so that the anaerobic effluent can bear larger membrane inlet pressure, the membrane flux is obviously improved, and the problem of low membrane flux in the prior art is solved.

Drawings

The following drawings of the present invention are used herein as part of the present invention for understanding the present invention. There are shown in the drawings, embodiments and descriptions of the invention, which are used to explain the principles and devices of the invention. In the drawings there is shown in the drawings,

FIG. 1 is a schematic structural diagram of an external anaerobic tubular membrane bioreactor wastewater treatment system according to an embodiment of the present invention.

Reference numerals:

101: an anaerobic reactor;

102: a tubular membrane module;

103: a chemical cleaning tank;

104: washing the tank;

105: a methane tank;

106: a steam mixer.

Detailed Description

In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the present invention.

In order to thoroughly understand the present invention, detailed steps will be provided in the following description in order to explain the external anaerobic tubular membrane bioreactor wastewater treatment system provided by the present invention. It is apparent that the practice of the invention is not limited to the specific details known to those skilled in the art. The preferred embodiments of the present invention are described in detail below, however, other embodiments of the present invention are possible in addition to these detailed descriptions.

It will be understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

The existing anaerobic Membrane Biological Reaction (MBR) technology for advanced wastewater treatment has many problems. Firstly, the current anaerobic MBR technology mainly comprises the step of immersing a membrane component in an anaerobic reactor to form a built-in anaerobic MBR device, wherein the built-in anaerobic MBR device realizes cross flow operation of a membrane surface by utilizing upward shearing force of gas and liquid during aeration, has smaller membrane flux and is generally only suitable for treating low-concentration organic wastewater. And because the requirement of the roll-type membrane and the hollow fiber membrane on the quality of inlet water is high, the roll-type membrane and the hollow fiber membrane are not suitable for the treatment of feed liquid with high solid content and high concentration, the flat membrane is mostly adopted for wastewater treatment, and has the defects of small flux, low treatment efficiency and large occupied area, and simultaneously, the defects of easy fouling and blockage of the membrane, poor cleaning effect, danger caused by flushing by using methane and the like exist.

At present, the domestic anaerobic membrane bioreactor mainly adopts immersed flat membranes, and due to the structural characteristics of the flat membranes, the submerged flat membranes cannot bear higher pressure, so that the membrane inlet pressure of a system is generally lower, the water production flux of a rear-end membrane tube is generally lower than 30LMH, the investment and operation cost of a membrane component is high, the treatment capacity of a front-end anaerobic reactor cannot be improved, and the engineering application of the technology is limited.

For example, some kitchen wastewater anaerobic MBR treatment equipment adopts the combination of an anaerobic reactor and a built-in hollow fiber membrane component or a built-in flat membrane component, and after the membrane component is polluted, biogas generated in the anaerobic reactor is selected for aeration cleaning. The flux of the built-in hollow fiber membrane and the built-in flat membrane is lower, the treatment efficiency is not as good as that of a tubular membrane, pollution control is performed by using methane, the flushing efficiency is low due to low methane flow rate and insufficient flushing force, and meanwhile, due to the fact that the methane is flammable and explosive, certain danger exists in methane flushing.

In addition, for the tubular membrane, the existing process mostly adopts a clean water washing mode to control membrane pollution. However, the membrane system has high solid content of sewage, complex components, serious pollution to membrane materials, great removal difficulty, small effect of pure low-speed clean water flushing, and failure of timely pollution reduction, and the water consumption in the flushing process is large, the power consumption of equipment is increased, and the whole operation cost is increased.

The backwashing process is also widely applied to tubular membrane pollution control in recent years, pollutants adsorbed above and in membrane holes are cleaned through reverse water flow, and effective control can be formed on membrane pollution. However, the backwashing process has high requirement on the anti-extrusion performance of the membrane tube, the common membrane tube is difficult to meet the backwashing requirement, the membrane tube cannot be applied to all tubular membranes, and the backwashing pressure rises obviously along with the increase of the pollution degree, so that the flushing effect is reduced and the operation cost is increased.

Some technologies adopt a mode that water flowing out of a membrane component flows back to the bottom of a membrane for washing, and adopt turbulent flow of water to wash a membrane pipe. In order to ensure the flushing effect, the water flow speed on the surface of the membrane tube must reach a higher value, so a large amount of backflow of the water produced by the membrane system is needed, the integral water yield of the system is reduced, and meanwhile, the energy consumption of the flushing pump is higher, and the operation cost is increased.

And in some anaerobic MBR systems, a silicon carbide tubular membrane is used for replacing the existing common organic membrane so as to delay the layering speed of pollutants on the surface of the membrane, the negative pressure resistance is good, and a better flushing effect can be achieved by adopting an online back flushing method. However, the system utilizes a method combining the forward flushing and the backward flushing of clean water, and requires the membrane tube to have stronger internal and external pressure resistance, so that the cost of the membrane tube is higher.

To the problem, the embodiment of the utility model provides an external anaerobism tubular membrane bioreactor effluent disposal system adopts external tubular membrane technology to handle the anaerobism and goes out water, and more hold back mud and return to anaerobic reactor in, increased mud quantity to improve the anaerobic fermentation effect, improve marsh gas productivity. The washing unit can realize the continuous on-line washing of clear water, and the high pressure clear water erodes the membrane tube inner wall in succession, in time gets rid of the pollutant on membrane tube surface. The chemical cleaning unit can realize deep cleaning of the membrane tube and effectively recover the state of the membrane tube.

The waste water treatment system of the external anaerobic tubular membrane bioreactor of the utility model is further described with reference to figure 1. In fig. 1, PIT denotes a remote pressure gauge, FIT denotes a remote flow meter, TIT denotes a remote temperature gauge, and LIT denotes a remote level gauge.

As shown in FIG. 1, the waste water treatment system of the external anaerobic tubular membrane bioreactor of the embodiment of the present invention comprises an anaerobic reactor 101, a tubular membrane module 102, a chemical cleaning tank 103, and a flushing tank 104. The anaerobic reactor 101 is used for obtaining sewage to be treated and carrying out anaerobic fermentation on the sewage, and the anaerobic reactor 101 is connected with a water outlet pipeline and a concentrated water pipeline; the tubular membrane module 102 is connected with a water outlet pipeline and a sewage pipeline, and is used for receiving the outlet water of the anaerobic reactor 101 through the water outlet pipeline to filter the outlet water, returning the filtered concentrated water to the anaerobic reactor 101 through a concentrated water pipeline, and a pressure pump is further arranged on the water outlet pipeline and is used for increasing the flow rate of the outlet water; a chemical cleaning tank 103, which is connected with the tubular membrane module 102 through a chemical agent pipeline and a return pipeline, and is used for cleaning the tubular membrane module 102 by using a chemical agent, wherein a chemical cleaning pump is arranged on the chemical agent pipeline and is used for conveying the chemical agent to the tubular membrane module 102, and the return pipeline is used for receiving and cleaning return chemicals; the washing tank 104 is connected with the tubular membrane module 102 through a water supply pipeline and a water return pipeline, and is used for washing the tubular membrane module 102 with clean water, a washing pump is arranged on the water supply pipeline and is used for conveying clean water to the tubular membrane module, and the water return pipeline is used for receiving cleaning return water.

Wherein, the anaerobic reactor 101 adopts anaerobic biological treatment technology to carry out anaerobic fermentation on the sewage, the side wall of the middle upper part of the anaerobic reactor 101 is provided with a water outlet used for leading out the effluent of the anaerobic fermentation, and the water outlet is connected with a water outlet pipeline; the top of the anaerobic fermentation tank is provided with a methane outlet for leading out methane generated by anaerobic fermentation, and the methane outlet is connected with a methane pipeline; the bottom is provided with a sludge outlet for discharging the deposited sludge. The middle upper part of the anaerobic reactor 101 is also provided with a concentrated water port for receiving concentrated water, and the concentrated water port is connected with a concentrated water pipeline.

The anaerobic reactor 101 further comprises a water inlet, illustratively a sewage feed pump is provided at the front end of the water inlet for pumping sewage to be treated into the anaerobic reactor 101. In one embodiment, the system further comprises a steam mixer 106, the anaerobic reactor 101 is connected with the steam mixer 106, the steam mixer 106 is connected with a steam source and a sewage feeding pump, and the steam mixer is used for mixing steam provided by the steam source and sewage provided by the sewage feeding pump, and heating the sewage by using the steam to ensure the proper temperature for anaerobic fermentation.

In one embodiment, the system further comprises a methane tank 105, wherein the methane tank 105 is connected with the methane outlet of the anaerobic reactor 101 through a methane pipeline and is used for receiving methane generated by the anaerobic reactor and storing the methane for later use. Furthermore, a water-sealed tank is arranged on the biogas pipeline, and biogas flows out of the anaerobic reactor 101 and then passes through the water-sealed tank to control the pressure value in the anaerobic reactor 101. Illustratively, the biogas pipeline is provided with a pressure gauge and a flow meter for monitoring the pressure and flow of the biogas.

Illustratively, a sludge outlet of the anaerobic reactor 101 is connected with a sewage pipeline for discharging sludge deposited at the bottom of the anaerobic reactor, and a sludge pump and a flow meter are arranged on the sewage pipeline, and the flow meter is arranged at the front end of the sludge pump so as to accurately meter the sludge discharge amount.

The anaerobic reactor 101 is connected with the tubular membrane module 102 through a water outlet pipeline and a concentrated water pipeline, and effluent of anaerobic fermentation overflows and enters the tubular membrane module 102 through the water outlet pipeline for filtration. After the filtration and separation of the membrane pipes, the filtered clean water (produced water) is further treated after being output through the water production pipeline connected with the tubular membrane module 102, and the intercepted sludge-containing concentrated water returns to the anaerobic reactor 101 through the concentrated water pipeline, so that more intercepted sludge returns to the anaerobic reactor 101, the sludge quantity is increased, the anaerobic fermentation effect is improved, and the methane yield is improved. During the operation process, the concentrated water quantity and the water yield of the tubular membrane component can be controlled by adjusting the opening of a concentrated water valve on a concentrated water pipeline, so that the pressure of the tubular membrane and the water yield flux are changed.

The Tubular Membrane module 102 is a Tubular Membrane (Tubular Membrane) made of a support body made of glass fiber synthetic paper, non-woven fabric, plastic, ceramic or stainless steel by tape casting, and is used for removing impurities in water to achieve the purpose of purifying water. A membrane for water treatment divide into dull and stereotyped membrane, tubular membrane, book formula membrane and hollow fiber membrane four kinds structurally, and wherein book formula membrane, hollow fiber membrane require to intake water quality of water higher, are not suitable for the feed liquid of high solid content, high concentration to be handled, and the embodiment of the utility model provides an adopted tubular membrane is because of advantages such as its open channel design, mechanical strength are big, require lowly to the preliminary treatment of intaking, is particularly suitable for handling the liquid that contains great granule and suspended solid.

In addition, a pressure pump is arranged on the water outlet pipeline, the effluent of the anaerobic reactor 101 is pressurized by the pressure pump, the flow rate of the feed liquid on the membrane surface is increased, compared with a flat membrane, a spiral membrane and a hollow fiber membrane, the membrane flux is obviously increased while the effect of efficiently removing pollutants (such as COD, TN, SS and the like) is maintained, and the membrane pollution can be further controlled under the condition of large flow rate.

Exemplarily, a filter is further arranged on the water outlet pipeline and used for filtering large-particle impurities in the water, and the filter is arranged at the front end of the pressurizing pump, namely the water outlet is firstly subjected to primary filtering by the filter and then is pressurized by the pressurizing pump. The arrangement of the filter can prevent the membrane tube from being polluted and damaged by large-particle impurities.

The waste water treatment system of the external anaerobic tubular membrane bioreactor provided by the embodiment of the utility model also comprises a membrane flushing unit, which is used for clearing away impurities trapped on the membrane by utilizing the shearing force of high-speed water flow, so that the filtration capacity of the system is recovered in a short time. Specifically, the membrane washing unit includes a chemical agent washing unit for washing the tubular membrane module 102 with a chemical agent, and a washing unit, which may also be referred to as a clean water washing unit, for washing the tubular membrane module 102 with clean water.

The chemical agent cleaning unit mainly comprises a chemical cleaning tank 103, a chemical agent pipeline and a return pipeline, wherein the chemical agent pipeline and the return pipeline are used for connecting the chemical cleaning tank 103 and the tubular membrane assembly 102, a chemical cleaning pump is arranged on the chemical agent pipeline and used for conveying chemical agents, and the return pipeline is used for receiving, cleaning and returning chemicals. The tail end of the chemical agent pipeline is connected with a water outlet pipeline, and particularly, the tail end of the chemical agent pipeline is arranged between a water inlet main valve of the tubular membrane component on the water outlet pipeline and the pressurizing pump. One end of the return pipeline is connected with the chemical cleaning tank 103, and the other end is arranged on the concentrated water pipeline. At least one valve is arranged on each of the chemical agent pipeline and the medicine return pipeline.

The washing unit mainly comprises a washing tank 104, a water supply pipeline and a water return pipeline, wherein the water supply pipeline and the water return pipeline are used for connecting the washing tank 104 and the tubular membrane module 102, a washing pump is arranged on the water supply pipeline and used for conveying clean water, and the washing unit is used for washing the tubular membrane module 102 by using the clean water. At least one valve is arranged on the water supply pipeline and the water return pipeline.

Illustratively, when the system runs for a set time, the clean water washing unit is started to enter a clean water washing mode, and the time can be set according to the pollution degree of the tubular membrane module. In the clean water flushing mode, the pressure pump, the main water inlet valve and the main concentrated water valve of the tubular membrane module 102 are closed, the front and rear valves of the flushing pump, the valves on the water return pipeline and the main flushing valves in front of and behind the tubular membrane module 102 are opened in sequence, then the flushing pump is opened, clean water is sent into the tubular membrane module 102 by the flushing pump, and flushing return water is returned to the flushing tank 103 through the water return pipeline. The component is used for executing a clear water washing process, aims to replace waste water in a pipeline and a tubular membrane component, and washes the inner wall of a membrane tube by adopting high-pressure and high-flow-rate water flow so as to achieve the aim of removing pollutants. In the washing process, the washing frequency, the washing time and the membrane flux data are linked, and the washing frequency and the washing time can be dynamically adjusted through set logic, so that the membrane surface pollution can be eliminated to the maximum extent in time.

Illustratively, after the membrane filtration process and the clean water washing process are performed, the liquid level of the washing tank 104 is automatically controlled, the water inlet valve of the washing tank 104 is automatically closed after the set liquid level is reached, and water is automatically supplemented when the liquid level is insufficient.

Due to the characteristics of the tubular membrane module 102, flux inevitably decreases after longer operation. The chemical cleaning performed by the chemical cleaning unit can quickly restore the film state. Illustratively, the chemical cleaning unit further comprises a chemical tank and a dosing pump, the chemical tank is connected with the chemical cleaning tank 103 and is used for supplying chemical to the chemical cleaning tank 103. The chemical adding pump is used for pumping the chemical agent in the chemical agent tank into the chemical cleaning tank 103. When the chemical rinsing process is executed, the chemical agent for cleaning is uniformly mixed in the chemical agent tank, and is added into the chemical cleaning tank 103 by the chemical adding pump.

Illustratively, the chemical cleaning comprises two stages of acid cleaning and alkali cleaning, wherein in the acid cleaning stage, the adopted chemical agent is obtained by adding a proper amount of 30% hydrochloric acid agent into water and adjusting the pH value to be 1.0-1.5, and the chemical agent has the function of removing metal pollutants and partial scales in a membrane tube and a system pipeline. And (3) carrying out alkaline washing after acid washing, wherein the chemical agent adopted in the alkaline washing stage is obtained by adding a proper amount of sodium hydroxide solution and sodium hypochlorite solution into water and adjusting the pH to 11.0-11.5, and the chemical agent has the function of removing organic impurities in the membrane tube and the system pipeline.

After the PH value of the cleaning agent meets the set requirement, a manual valve in front of and behind the chemical cleaning pump, a water inlet main valve and a concentrated water main valve of the tubular membrane assembly 102 are opened, concentrated water is closed and flows back to an electric valve of the anaerobic reactor 101, the chemical cleaning pump is started, the chemical agent enters the tubular membrane assembly 102 through a chemical agent pipeline and returns to the chemical cleaning tank 103 through a return pipeline, the chemical cleaning tank 103, the chemical cleaning pump and the tubular membrane assembly 102 are cleaned in a circulating mode, the effect that the whole pipeline, the valve and the tubular membrane assembly are soaked in the chemical cleaning agent is achieved, organic pollutants, metal ions and the like left in the membrane pipe due to long-term operation are fully removed, and the state of the membrane is effectively recovered. And after the set time of the chemical cleaning is reached, closing the chemical cleaning pump.

After the chemical cleaning process is finished, the chemical agent remained in the system is removed by adopting the flushing process, each electric valve and each manual valve on the chemical cleaning pipeline are closed, the electric valve on the concentrated water pipeline is opened, and the whole system is switched to the membrane filtration process state again.

In one embodiment, the system further comprises a controller for controlling the pressurization pump, the chemical cleaning pump, and the rinse pump; the controller can also control the feeding pump, the sludge discharge pump, the dosing pump and various valves. The controller may be automatically controlled based on the measured values of the respective sensors.

For example, the anaerobic reactor 101 is provided with a remote liquid level meter and a remote thermometer which are connected with the controller in communication, that is, a liquid level meter and a thermometer with remote transmission function. The controller can control the feed pump, the valves on the feed line and the like according to the remote liquid level meter and the remote thermometer of the anaerobic reactor 101.

A remote transmission thermometer, a remote transmission flowmeter and a remote transmission pressure gauge which are in communication connection with the controller are arranged on a water outlet pipeline connected with the anaerobic reactor 101. The controller can control the pressurizing pump, the valve on the water outlet pipeline and the like according to the sensor on the water outlet pipeline.

A remote-transmission flowmeter which is in communication connection with the controller is arranged on a water production pipeline of the connecting pipeline type membrane module 102, and a remote-transmission pressure gauge which is in communication connection with the controller is arranged on a thick water pipeline. The controller can adjust the opening degree of a concentrated water main valve of the tubular membrane module 102 according to the sensor, thereby controlling the concentrated water quantity and the water production quantity of the tubular membrane module 102 and changing the membrane inlet pressure and the water production flux.

Illustratively, the rinse tank 104 and the chemical cleaning tank 103 are also provided with a remote liquid level meter and a remote temperature meter which are in communication connection with a controller, and the controller can control the liquid replenishment of the rinse tank 104 and the chemical cleaning tank 103 according to sensors provided in the rinse tank 104 and the chemical cleaning tank 103.

Based on the above description, the external anaerobic tubular membrane bioreactor wastewater treatment system provided by the embodiment of the utility model has the following advantages:

(1) the tubular membrane component is combined with the anaerobic reactor, the solid-liquid separation effect of the anaerobic reactor is effectively improved through the interception effect of the tubular membrane component, and the problem of poor effluent quality of the single anaerobic reactor is solved;

(2) microorganisms are trapped in the anaerobic reactor through the tubular membrane component, so that the problem of sludge loss commonly occurring in the conventional anaerobic system is solved, the stability of microorganism populations is improved, and the anaerobic organic load and the biogas yield are greatly improved;

(3) by adopting a high-pressure membrane filtration mode, the intercepted sludge is returned to the anaerobic tank, so that the hydraulic retention time and the sludge retention time are separated, the organic load and the biogas yield of the anaerobic tank are greatly improved, and the hydraulic retention time is shortened, so that the volume of the anaerobic tank for treating the sewage with the same quantity can be further reduced, and the equipment investment and the operation cost are saved;

(4) by rinsing with clear water and cleaning with chemical agents, the membrane tube rinsing effect is improved, and the rinsing efficiency is improved, so that the operation period of a membrane system can be prolonged, and the problems of short effective operation time, short membrane service life and the like caused by accelerated membrane pollution are solved;

(5) compared with a flat membrane, a spiral membrane and a hollow fiber membrane, the anaerobic effluent is treated by using the external tubular membrane, so that the anaerobic effluent can bear larger membrane inlet pressure, the membrane flux is obviously improved, the problem of low membrane flux commonly existing in the current market is solved, and the membrane pollution can be further controlled at a high flow rate;

(6) can realize the full-automatic operation of membrane filtration, clear water washing, the operation of being convenient for, the operation is simple.

Unless defined otherwise, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Terms such as "disposed" and the like, appearing herein, may mean either that one element is directly attached to another element, or that one element is attached to another element through intervening elements. Features described herein in one embodiment may be applied to another embodiment, either alone or in combination with other features, unless the feature is not applicable or otherwise stated in the other embodiment.

The present invention has been described in terms of the above embodiments, but it is to be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the invention to the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that many variations and modifications may be made in accordance with the teachings of the present invention, all within the scope of the present invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (10)

1. The utility model provides an external anaerobism tubular membrane bioreactor effluent disposal system which characterized in that, external anaerobism tubular membrane bioreactor effluent disposal system includes:

the anaerobic reactor is used for acquiring sewage to be treated and carrying out anaerobic fermentation on the sewage, and the anaerobic reactor is connected with a water outlet pipeline and a concentrated water pipeline;

the tubular membrane assembly is connected with the water outlet pipeline and the concentrated water pipeline and is used for receiving the outlet water of the anaerobic reactor through the water outlet pipeline, filtering the outlet water and returning the filtered concentrated water to the anaerobic reactor through the concentrated water pipeline, and a pressure pump is further arranged on the water outlet pipeline and is used for pressurizing the outlet water;

the chemical cleaning tank is connected with the tubular membrane assembly through a chemical agent pipeline and a return pipeline and is used for cleaning the tubular membrane assembly by using a chemical agent, a chemical cleaning pump is arranged on the chemical agent pipeline and is used for conveying the chemical agent to the tubular membrane assembly, and the return pipeline is used for receiving cleaning return chemicals;

the washing tank is connected with the tubular membrane component through a water supply pipeline and a water return pipeline and used for washing the tubular membrane component by using clear water, a washing pump is arranged on the water supply pipeline and used for conveying the clear water to the tubular membrane component, and the water return pipeline is used for receiving washing return water.

2. The wastewater treatment system of the external anaerobic tubular membrane bioreactor according to claim 1, further comprising a methane tank, wherein the methane tank is connected with the anaerobic reactor through a methane pipeline, and methane generated by the anaerobic reactor enters the methane tank through the methane pipeline.

3. The wastewater treatment system of the external anaerobic tubular membrane bioreactor according to claim 2, wherein a water-sealed tank is arranged on the biogas pipeline.

4. The external anaerobic tubular membrane bioreactor wastewater treatment system as set forth in claim 1, further comprising a steam mixer connected to the anaerobic reactor, the steam mixer being connected to a steam source and a sewage feed pump for mixing steam provided by the steam source and sewage provided by the sewage feed pump.

5. The wastewater treatment system of the external anaerobic tubular membrane bioreactor according to claim 1, wherein the water outlet pipeline is further provided with a filter for filtering large-particle impurities in the effluent, and the filter is arranged at the front end of the pressure pump.

6. The external anaerobic tubular membrane bioreactor wastewater treatment system as set forth in claim 1, further comprising a controller for controlling the pressurization pump, the chemical cleaning pump and the washing pump.

7. The external anaerobic tubular membrane bioreactor wastewater treatment system as set forth in claim 6, wherein the anaerobic reactor, the flushing tank and the chemical cleaning tank are provided with a remote liquid level meter and a remote thermometer which are in communication connection with the controller.

8. The wastewater treatment system of the external anaerobic tubular membrane bioreactor as claimed in claim 6, wherein the water outlet pipeline is provided with a remote thermometer, a remote flow meter and a remote pressure gauge which are in communication connection with the controller.

9. The external anaerobic tubular membrane bioreactor wastewater treatment system as set forth in claim 6, wherein the tubular membrane module is connected to a water production pipeline for leading out the filtered produced water, and a remote flow meter is disposed on the water production pipeline and is in communication connection with the controller; and the concentrated water pipeline is provided with a remote transmission pressure gauge in communication connection with the controller.

10. The external anaerobic tubular membrane bioreactor wastewater treatment system as claimed in claim 1, wherein the bottom of the anaerobic reactor is provided with a sludge outlet, the sludge outlet is connected with a sewage pipeline for discharging sludge deposited at the bottom of the anaerobic reactor, the sewage pipeline is provided with a sludge pump and a flow meter, and the flow meter is arranged at the front end of the sludge pump.

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