CN111377531A - Method for early warning membrane performance of membrane bioreactor - Google Patents
Method for early warning membrane performance of membrane bioreactor Download PDFInfo
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- CN111377531A CN111377531A CN202010319859.4A CN202010319859A CN111377531A CN 111377531 A CN111377531 A CN 111377531A CN 202010319859 A CN202010319859 A CN 202010319859A CN 111377531 A CN111377531 A CN 111377531A
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Abstract
The invention provides a method for early warning the membrane performance of a membrane bioreactor, and relates to the technical field of sewage treatment. The method for early warning the membrane performance of the membrane bioreactor comprises the following steps: s1, preparing a membrane module of the membrane bioreactor, introducing sewage into the membrane bioreactor, and collecting data of the membrane module of the membrane bioreactor; s2, physically cleaning the membrane module of the membrane bioreactor, and recording physical cleaning parameters. According to the invention, through the acquisition and training of data, the membrane component can generate the membrane flux and subsequent change values of the membrane component only by introducing the influence factors such as the sewage concentration, the sewage flow, the cleaning water pressure value and the cleaning water flow value into the trained model in the subsequent use process, so that the membrane performance of the membrane bioreactor can be conveniently monitored in real time, the change condition of the performance in the use process of the membrane component can be effectively known, and the performance of the membrane component can be evaluated and early warned in advance.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a method for early warning the membrane performance of a membrane bioreactor.
Background
In sewage treatment and water resource field of recycling, MBR is also called membrane bioreactor, be a novel water treatment technology that combines together by membrane separation unit and biological treatment unit, membrane bioreactor is the novel attitude effluent disposal system that membrane separation technology and biological treatment technology combined organically, replace traditional biological treatment technology terminal secondary sedimentation tank with the membrane module, keep high active sludge concentration in bioreactor, improve biological treatment organic load, thereby reduce sewage treatment facility area, and reduce the excess sludge volume through keeping low sludge load, mainly utilize membrane separation equipment to hold back active sludge and the macromolecular organic matter in the aquatic. The concentration of activated sludge (MLSS) in the membrane bioreactor system can be increased to 8000-10000mg/L and even higher, and the sludge age can be prolonged to more than 30 days.
Compared with the traditional activated sludge process, the membrane bioreactor treatment method has the advantages of good and stable effluent quality, low residual sludge yield, small occupied area, easiness in installation, convenience in operation and the like. Meanwhile, in the practical application process, the membrane module of the membrane bioreactor is easy to block, the service life is relatively short, the cost is high, and the membrane performance cannot be early warned in the process of using the membrane bioreactor, so that the change condition of the performance in the use process of the membrane module cannot be effectively known, and the performance of the membrane module cannot be evaluated in advance.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a method for early warning the membrane performance of a membrane bioreactor, and solves the defects in the prior art.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: the method for early warning the membrane performance of the membrane bioreactor comprises the following steps:
s1, preparing a membrane module of the membrane bioreactor, introducing sewage into the membrane bioreactor, and collecting data of the membrane module of the membrane bioreactor;
s2, physically cleaning a membrane module of the membrane bioreactor, and recording physical cleaning parameters;
s3, introducing the sewage into the membrane bioreactor again, and collecting data of the membrane module of the reactor;
s4, repeating the steps 2 and 3 for multiple times to obtain multiple groups of data samples;
s5, establishing a multiple two-dimensional coordinate system and acquiring a related value track;
and S6, establishing a three-dimensional model of the membrane module, importing multiple correlation value tracks and training the model.
Preferably, the specific content in step 1 is as follows:
1) preparing a plurality of sets of membrane modules, successively marked C1、C2、C3...CnKeeping the initial performance of the multiple groups of membrane modules the same as other parameters;
2) firstly, controlling the concentration and the flow of the sewage, setting a sewage control group, and sequentially marking as W1、W2、W3...WnThen, the multiple groups of membrane modules are in one-to-one correspondence with the sewage control group, namely marked as C1-W1、C2-W2、C3-W3...Cn-Wn；
3) The membrane flux of each group of membrane modules is measured and is marked as L in sequence1、L2、L3...LnThen corresponds to the above-mentioned mark, namely C1-W1-L1、C2-W2-L2、C3-W3-L3...Cn-Wn-Ln；
4) Taking 12 hours as a period, collecting C1-W1-L1、C2-W2-L2、C3-W3-L3...Cn-Wn-LnCorresponding to the values, the test time was 360 hours.
Preferably, the specific content in step 2 is as follows:
1) after the membrane module test and data acquisition are finished, stopping introducing sewage, and flushing the surface of the membrane module by using tap water to remove sludge impurities attached to the surface of the membrane module;
2) in the physical cleaning process, different water pressures and water flows are adopted for each group of membrane modules, and the water pressure value is marked as F1、F2、F3...FnWater flow value marked P1、P2、P3...PnRecord each ofThe water pressure values and the water flow values correspond to the membrane components one by one.
Preferably, the specific content in step 4 is as follows:
1) based on the data obtained in step 1, it is labeled G1；
2) Marking the data obtained by repeating the operation step 3 as G2、G3...Gn；
3) Marking the data obtained by repeating the operation step 2 as K in sequence1、K2、K3...KnAnd the data samples are in one-to-one correspondence and marked as G1-K1、G2-K2、G3-K3...Gn-Kn。
Preferably, the specific content in step 5 is as follows:
1) according to all the collected data, firstly eliminating data groups with large differences, and then establishing a sewage concentration and membrane flux two-dimensional coordinate system, a sewage flow and membrane flux two-dimensional coordinate system, a cleaning water pressure value and membrane flux two-dimensional coordinate system, and a cleaning water flow value and membrane flux two-dimensional coordinate system;
2) and (4) all the effective data are imported into a corresponding two-dimensional coordinate system, and plane tracks of different variables relative to the membrane flux are generated.
Preferably, the specific content in step 6 is as follows:
1) constructing a three-dimensional model of the membrane assembly by using software, wherein parameters of the membrane assembly can be adjusted at will;
2) and substituting the obtained correlation value tracks into the three-dimensional model one by one, and performing simulation training between different variables and membrane flux on the three-dimensional model to obtain a membrane performance early warning algorithm of the membrane bioreactor.
(III) advantageous effects
The invention provides a method for early warning the membrane performance of a membrane bioreactor. The method has the following beneficial effects:
1. according to the invention, through the acquisition and training of data, the membrane component can generate the membrane flux and subsequent change values of the membrane component only by introducing the influence factors such as the sewage concentration, the sewage flow, the cleaning water pressure value and the cleaning water flow value into the trained model in the subsequent use process, so that the membrane performance of the membrane bioreactor can be conveniently monitored in real time, the change condition of the performance in the use process of the membrane component can be effectively known, and the performance of the membrane component can be evaluated and early warned in advance.
2. According to the invention, through testing the acquired data and the established three-dimensional model, the adaptive values of the membrane component in the membrane bioreactor to different influence factors can be integrated, and through correcting parameters of different influence factors, the performance of the membrane component can be improved, the service life of the membrane component is prolonged, and the use cost of the membrane component is reduced.
Drawings
FIG. 1 is a flow chart of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example (b):
as shown in fig. 1, an embodiment of the present invention provides a method for early warning of membrane performance of a membrane bioreactor, including the following steps:
s1, preparing a membrane module of the membrane bioreactor, introducing sewage into the membrane bioreactor, and collecting data of the membrane module of the reactor, wherein the specific contents are as follows:
1) preparing a plurality of sets of membrane modules, successively marked C1、C2、C3...CnKeeping the initial performance of the multiple groups of membrane modules the same as other parameters;
2) firstly, controlling the concentration and the flow of the sewage, setting a sewage control group, and sequentially marking as W1、W2、W3...WnThen, the multiple groups of membrane modules are in one-to-one correspondence with the sewage control group, namely marked as C1-W1、C2-W2、C3-W3...Cn-Wn；
3) The membrane flux of each group of membrane modules is measured and is marked as L in sequence1、L2、L3...LnThen corresponds to the above-mentioned mark, namely C1-W1-L1、C2-W2-L2、C3-W3-L3...Cn-Wn-Ln；
4) Taking 12 hours as a period, collecting C1-W1-L1、C2-W2-L2、C3-W3-L3...Cn-Wn-LnCorresponding numerical value, the test time is 360 hours;
s2, physically cleaning the membrane module of the membrane bioreactor, and recording physical cleaning parameters, wherein the specific contents are as follows:
1) after the membrane module test and data acquisition are finished, stopping introducing sewage, and flushing the surface of the membrane module by using tap water to remove sludge impurities attached to the surface of the membrane module;
2) in the physical cleaning process, different water pressures and water flows are adopted for each group of membrane modules, and the water pressure value is marked as F1、F2、F3...FnWater flow value marked P1、P2、P3...PnRecording each water pressure value and water flow value, and corresponding to the membrane modules one by one;
s3, introducing the sewage into the membrane bioreactor again, and collecting data of the membrane module of the reactor, wherein the operation of the step is the same as that of the step 1, and relevant data are recorded;
s4, repeating the steps 2 and 3 for multiple times to obtain multiple groups of data samples, wherein the specific content is as follows:
1) based on the data obtained in step 1, it is labeled G1；
2) Marking the data obtained by repeating the operation step 3 as G2、G3...Gn；
3) Marking the data obtained by repeating the operation step 2 as K in sequence1、K2、K3...KnAnd the data samples are in one-to-one correspondence and marked as G1-K1、G2-K2、G3-K3...Gn-Kn；
S5, establishing a multiple two-dimensional coordinate system, and obtaining a related value track, wherein the specific contents are as follows:
1) according to all the collected data, firstly eliminating data groups with large differences, and then establishing a sewage concentration and membrane flux two-dimensional coordinate system, a sewage flow and membrane flux two-dimensional coordinate system, a cleaning water pressure value and membrane flux two-dimensional coordinate system, and a cleaning water flow value and membrane flux two-dimensional coordinate system;
2) all effective data are led into a corresponding two-dimensional coordinate system, and plane tracks of different variables about membrane flux are generated;
s6, establishing a three-dimensional model related to the membrane module, importing multiple correlation value tracks, and training the model, wherein the specific contents are as follows:
1) constructing a three-dimensional model of the membrane assembly by using software, wherein parameters of the membrane assembly can be adjusted at will;
2) the obtained correlation value tracks are substituted into the three-dimensional model one by one, simulation training between different variables and membrane flux is carried out on the three-dimensional model, and a membrane performance early warning algorithm of the membrane bioreactor is obtained.
According to the invention, through testing the acquired data and the established three-dimensional model, the adaptive values of the membrane component in the membrane bioreactor to different influence factors can be integrated, and through correcting parameters of different influence factors, the performance of the membrane component can be improved, the service life of the membrane component is prolonged, and the use cost of the membrane component is reduced.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The method for early warning the membrane performance of the membrane bioreactor is characterized by comprising the following steps: the method comprises the following steps:
s1, preparing a membrane module of the membrane bioreactor, introducing sewage into the membrane bioreactor, and collecting data of the membrane module of the membrane bioreactor;
s2, physically cleaning a membrane module of the membrane bioreactor, and recording physical cleaning parameters;
s3, introducing the sewage into the membrane bioreactor again, and collecting data of the membrane module of the reactor;
s4, repeating the steps 2 and 3 for multiple times to obtain multiple groups of data samples;
s5, establishing a multiple two-dimensional coordinate system and acquiring a related value track;
and S6, establishing a three-dimensional model of the membrane module, importing multiple correlation value tracks and training the model.
2. The method of pre-warning of membrane performance of a membrane bioreactor of claim 1, wherein: the specific content in the step 1 is as follows:
1) preparing a plurality of sets of membrane modules, successively marked C1、C2、C3...CnKeeping the initial performance of the multiple groups of membrane modules the same as other parameters;
2) firstly, the concentration of sewage and the sewage inlet flow are controlled, and the device is setWastewater control group, successively marked as W1、W2、W3...WnThen, the multiple groups of membrane modules are in one-to-one correspondence with the sewage control group, namely marked as C1-W1、C2-W2、C3-W3...Cn-Wn；
3) The membrane flux of each group of membrane modules is measured and is marked as L in sequence1、L2、L3...LnThen corresponds to the above-mentioned mark, namely C1-W1-L1、C2-W2-L2、C3-W3-L3...Cn-Wn-Ln；
4) Taking 12 hours as a period, collecting C1-W1-L1、C2-W2-L2、C3-W3-L3...Cn-Wn-LnCorresponding to the values, the test time was 360 hours.
3. The method of pre-warning of membrane performance of a membrane bioreactor of claim 1, wherein: the specific contents in the step 2 are as follows:
1) after the membrane module test and data acquisition are finished, stopping introducing sewage, and flushing the surface of the membrane module by using tap water to remove sludge impurities attached to the surface of the membrane module;
2) in the physical cleaning process, different water pressures and water flows are adopted for each group of membrane modules, and the water pressure value is marked as F1、F2、F3...FnWater flow value marked P1、P2、P3...PnAnd recording each water pressure value and water flow value, and corresponding to the membrane modules one by one.
4. The method of pre-warning of membrane performance of a membrane bioreactor of claim 1, wherein: the specific contents in the step 4 are as follows:
1) based on the data obtained in step 1, willIt is marked G1；
2) Marking the data obtained by repeating the operation step 3 as G2、G3...Gn；
3) Marking the data obtained by repeating the operation step 2 as K in sequence1、K2、K3...KnAnd the data samples are in one-to-one correspondence and marked as G1-K1、G2-K2、G3-K3...Gn-Kn。
5. The method of pre-warning of membrane performance of a membrane bioreactor of claim 1, wherein: the specific contents in the step 5 are as follows:
1) according to all the collected data, firstly eliminating data groups with large differences, and then establishing a sewage concentration and membrane flux two-dimensional coordinate system, a sewage flow and membrane flux two-dimensional coordinate system, a cleaning water pressure value and membrane flux two-dimensional coordinate system, and a cleaning water flow value and membrane flux two-dimensional coordinate system;
2) and (4) all the effective data are imported into a corresponding two-dimensional coordinate system, and plane tracks of different variables relative to the membrane flux are generated.
6. The method of pre-warning of membrane performance of a membrane bioreactor of claim 1, wherein: the specific contents in the step 6 are as follows:
1) constructing a three-dimensional model of the membrane assembly by using software, wherein parameters of the membrane assembly can be adjusted at will;
2) and substituting the obtained correlation value tracks into the three-dimensional model one by one, and performing simulation training between different variables and membrane flux on the three-dimensional model to obtain a membrane performance early warning algorithm of the membrane bioreactor.
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