CN112723536A - Method for retarding membrane pollution by utilizing quorum sensing inhibitor furanone in municipal sewage treatment process based on anaerobic membrane bioreactor - Google Patents
Method for retarding membrane pollution by utilizing quorum sensing inhibitor furanone in municipal sewage treatment process based on anaerobic membrane bioreactor Download PDFInfo
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Abstract
The application discloses a method for reducing membrane pollution by utilizing a quorum sensing inhibitor furanone in a municipal sewage treatment process based on an anaerobic membrane bioreactor, wherein the municipal sewage is treated by adopting a completely mixed anaerobic membrane bioreactor (AnMBR), anaerobic flocculent sludge containing anaerobic strains is inoculated in the anaerobic reactor of the AnMBR, and the anaerobic strains mainly comprise Proteobacteria, Firmicutes, bacteroideta, Chloroflexi, Synergostta and the like; add furanone and misce bene in advance in the municipal administration sewage, then get into AnMBR's anaerobic reactor, carry out anaerobic degradation under the stirring and handle, simultaneously through the filtering action of dull and stereotyped membrane module under the effect of suction pump, continuously discharge the clear water after handling. The invention treats municipal sewage based on AnMBR, effectively slows down the membrane pollution of AnMBR, and is expected to promote the wide application of the technology.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a method for retarding membrane pollution by utilizing a quorum sensing inhibitor furanone in a municipal sewage treatment process based on an anaerobic membrane bioreactor.
Background
The anaerobic membrane bioreactor (AnMBR) is used for treating municipal sewage and has the advantages of low sludge yield, good effluent quality, high pollutant removal efficiency and the like. However, the problem of membrane fouling increases the operating costs of anmbrs and is one of the major obstacles limiting widespread use of anmbrs for treating municipal wastewater. Therefore, how to effectively slow down membrane fouling of AnMBR becomes a current research focus.
Quorum Sensing (QS) is a mode of intercellular communication among microorganisms that promotes the formation of biofilms and is therefore closely associated with biofouling of membranes. In recent years, the quenching of mass (QQ) technology based on QS theory of microorganisms has been considered to inhibit biofilm formation from the source and is increasingly used for membrane bioreactor membrane fouling control.
The current research on QQ technology mainly focuses on the inhibition of EPS generation and biofilm formation by the addition of QQ microbial inactivation signal molecules. However, the QQ microbial method used at present has the disadvantages of long culture period, instability, difficult cell immobilization technology, high cost and the like. Research on other ways of alleviating membrane pollution based on the microbial quorum sensing quenching technology is urgently needed to be further developed.
It has been shown that furanones, as quorum sensing inhibitors, effectively inhibit biofilm formation by microorganisms by interfering with the QS system of the microorganisms through competitive binding to receptors for autoinducers. The literature (Water research, 2013, 47(3): 1049-1059) reports that furanone can effectively inhibit the formation of a pseudomonas aeruginosa biofilm. The literature (Mycopathologia, 2019, 184(3): 403-. However, these are directed only to biofilm control of microorganisms associated with food or medical devices, and studies on membrane fouling control of AnMBR complex microbial systems have been rarely reported.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention aims to provide a method for retarding membrane pollution by utilizing a quorum sensing inhibitor furanone in the municipal sewage treatment process based on an anaerobic membrane bioreactor, and aims to further retard the membrane pollution of AnMBR and promote the wide application of the AnMBR-based municipal sewage treatment technology.
The invention provides a method for retarding membrane pollution of an anaerobic membrane bioreactor by using furanone, which improves the characteristics of anaerobic flocculent sludge mixed liquor by adding a certain amount of furanone into a completely mixed AnMBR, can effectively improve the problem of membrane pollution, prolongs the membrane cleaning period and the service life of a membrane, thereby reducing the energy consumption and the operation cost and promoting the wide application of the AnMBR-based municipal sewage treatment technology.
The method for retarding membrane pollution by utilizing quorum sensing inhibitor furanone in the municipal sewage treatment process based on the anaerobic membrane bioreactor is characterized by comprising the following steps: the method comprises the following steps of (1) treating municipal sewage by adopting a completely mixed anaerobic membrane bioreactor (AnMBR), wherein the AnMBR comprises an anaerobic reactor containing an immersed membrane module, a water outlet of the membrane module is connected with a suction pump through a pipeline, a pressure gauge is arranged on the pipeline between the water outlet of the membrane module and the suction pump, and a stirrer for stirring mixed liquor in the anaerobic reactor is also arranged on the anaerobic reactor;
in the municipal sewage treatment process, anaerobic flocculent sludge containing anaerobic strains is inoculated in an anaerobic reactor, wherein the anaerobic strains comprise Proteobacteria, Firmicutes, bacteroideta, Chloroflexi and Synergistota; the method comprises the steps of adding furanone into municipal sewage in advance, uniformly mixing, introducing into an anaerobic reactor, carrying out anaerobic degradation treatment under stirring, and continuously discharging treated clear water under the pumping action of a suction pump through the filtering action of a membrane component.
The method for reducing membrane pollution by utilizing quorum sensing inhibitor furanone in the municipal sewage treatment process based on the anaerobic membrane bioreactor is characterized by comprising the following steps: in the municipal sewage treatment process, the transmembrane pressure difference TMP in the water outlet process of the membrane module is measured by the pressure gauge, when the TMP measured by the pressure gauge reaches 30kPa, the polluted membrane module is taken out of the anaerobic reactor, a new membrane module is replaced, then the anaerobic reactor continues to operate, and the polluted membrane module is cleaned.
The method for retarding membrane pollution by utilizing quorum sensing inhibitor furanone in the municipal sewage treatment process based on the anaerobic membrane bioreactor is characterized by comprising the following steps: the process of cleaning the polluted membrane assembly comprises the following steps: after being washed by clean water, the membrane component is soaked in a sodium hypochlorite solution of 400-600 mg/L for at least 12 h; the concentration of furanone added into municipal sewage is 50-120 mg/L, preferably 80-100 mg/L.
The method for reducing membrane pollution by utilizing quorum sensing inhibitor furanone in the municipal sewage treatment process based on the anaerobic membrane bioreactor is characterized by comprising the following steps: in the municipal sewage treatment process, the suspended solid concentration MLSS of the anaerobic flocculent sludge in the anaerobic reactor is kept between 5000-6000mg/L, and the solid retention time SRT of the sludge is 15-30 days; the hydraulic retention time HRT of the municipal sewage added with the furanone in the anaerobic reactor is 15-25 hours.
The method for reducing membrane pollution by utilizing quorum sensing inhibitor furanone in the municipal sewage treatment process based on the anaerobic membrane bioreactor is characterized by comprising the following steps: in the municipal sewage treatment process, the temperature of the mixed liquid in the anaerobic reactor is 20-35 ℃, the pH value is within the range of 6.7-7.4, and the stirring speed is 200-400 rpm.
The method for retarding membrane pollution by utilizing quorum sensing inhibitor furanone in the municipal sewage treatment process based on the anaerobic membrane bioreactor is characterized by comprising the following steps: the membrane component is a flat membrane, the flat membrane is made of polyvinylidene fluoride (PVDF), the pore diameter of the flat membrane is 0.08-0.15 mu m, and the membrane component is 5-8L m-2 h-1The flux of (c) continues to exit the water.
The method for retarding membrane pollution by utilizing quorum sensing inhibitor furanone in the municipal sewage treatment process based on the anaerobic membrane bioreactor is characterized by comprising the following steps: the anaerobic flocculent sludge containing the anaerobic strain is prepared by domesticating the following steps: anaerobic sludge is used as inoculation sludge, after the inoculation sludge is added into municipal sewage, the municipal sewage is domesticated and cultured for 15 to 25 hours in an anaerobic state, and after 15 to 25 hours, new municipal sewage is replaced, and the circular operation is carried out for 13 to 25 days; and (4) storing the anaerobic sludge obtained by domestication culture in an anaerobic environment to obtain the anaerobic flocculent sludge containing the anaerobic strain. The invention acclimatizes and cultures inoculated sludge in municipal sewage, and anaerobic bacteria in the sludge can adapt to organic matters in the municipal sewage as nutrient substances.
The method for retarding membrane pollution by utilizing quorum sensing inhibitor furanone in the municipal sewage treatment process based on the anaerobic membrane bioreactor is characterized by comprising the following steps: when the inoculated sludge is added into the municipal sewage for acclimatization culture, the suspended solid concentration MLSS of the inoculated sludge in the municipal sewage is controlled between 5000 and 6000 mg/L.
The method for reducing membrane pollution by utilizing quorum sensing inhibitor furanone in the municipal sewage treatment process based on the anaerobic membrane bioreactor is characterized by comprising the following steps: the COD value of the municipal sewage is 300 +/-50 mg/L, and the COD value of the clear water after the treatment is continuously discharged through the membrane module is 30 +/-10 mg/L.
Compared with the prior art, the invention has the following beneficial effects:
1) the furanone used in the invention has the advantages of simple preparation, low cost and convenient realization.
2) Furanone is added into the AnMBR, so that the membrane pollution problem can be effectively improved, the membrane cleaning period is prolonged, and the energy consumption and the operation cost of the AnMBR are reduced.
3) The addition of furanone has no adverse effect on the effluent quality of the AnMBR, and the effluent meets the first-level A discharge standard.
Drawings
FIG. 1 is a schematic diagram of three sets of fully mixed anaerobic membrane bioreactor devices operating in parallel;
FIG. 2 is a graph of transmembrane pressure difference over time for three sets of fully mixed anaerobic membrane bioreactors operating in parallel at different furanone dosages.
Detailed Description
The present invention is further illustrated by the following examples, which should not be construed as limiting the scope of the invention.
Referring to fig. 1 and 2, the invention relates to a method for reducing membrane pollution by using a quorum sensing inhibitor furanone in the municipal sewage treatment process based on an anaerobic membrane bioreactor. And after the anaerobic sludge mixed liquor is distributed to the AnMBR, opening a magnetic stirrer switch, adding the set furanone concentration into the anaerobic reactor and the inlet water, then starting to introduce the wastewater into the anaerobic reactor, and starting the AnMBR to operate. When the transmembrane pressure difference TMP value of the reactor system reaches a set value, the experiment is ended.
Referring to fig. 1, the AnMBR includes anaerobic reactors 1 containing immersed membrane modules 2, a suction pump 4 is connected to a water outlet of the membrane modules 2 through a pipeline, a pressure gauge 3 is arranged on a pipeline between the water outlet of the membrane modules 2 and the suction pump 4, a stirrer for stirring mixed liquid therein is further arranged on the anaerobic reactors, and the top of each anaerobic reactor 1 is connected with a gas collecting bag 5 through a pipeline.
Example 1: method for retarding membrane pollution of anaerobic membrane bioreactor by using furanone
Firstly, acclimating anaerobic flocculent sludge containing anaerobic strains, wherein the acclimation process is as follows:
s1: preparing simulated municipal sewage, wherein each 1L of solution contains 205mg of glucose, 15mg of ammonium chloride, 62mg of peptone, 6.2mg of monopotassium phosphate, 21mg of beef extract, 500mg of sodium bicarbonate, 0.06mg of nickel chloride, 0.05mg of ammonium molybdate, 0.1mg of manganese chloride, 0.3mg of cobalt chloride and 2mg of ferrous chloride.
S2: anaerobic sludge of high-concentration wastewater treated by a brewery is taken as inoculated sludge (sludge in an upflow anaerobic sludge blanket reactor (UASB) of a Hangzhou snowflake brewery), the inoculated sludge is mixed with the simulated municipal sewage prepared in the step S1, the concentration MLSS of suspended solids of the sludge in the mixture is controlled to be about 6000mg/L, the mixture is domesticated and cultured for 24 hours in an anaerobic state, the simulated municipal sewage is replaced after 24 hours, and the operation is circulated for 20 days; and (4) storing the anaerobic sludge obtained by domestication culture in an anaerobic environment to obtain the anaerobic flocculent sludge containing the anaerobic strain.
In this example 1, three sets of parallel anaerobic membrane bioreactors are used, see FIG. 1. The three groups of anaerobic reactors are made of organic glass and have the same shape, the sizes of 10 cm multiplied by 15 cm, and the effective volume is 1L. The three groups of anmbrs are labeled as group a, group B, and group C, respectively.
The anaerobic reactors of group A, group B and group C are applied to the municipal sewage treatment process, and the operation process comprises the following steps:
1) averagely dividing 3 parts of the acclimated anaerobic flocculent sludge containing anaerobic strains into 3 parts, respectively adding the 3 parts of the acclimated anaerobic flocculent sludge into anaerobic reactors of group A, group B and group C, and adjusting and maintaining the suspended solid concentration MLSS of the anaerobic flocculent sludge in each anaerobic reactor to be 6000mg/L so as to ensure that the concentration and the property of the sludge distributed in each anaerobic reactor are similar when an experiment starts;
2) then respectively stirring the mixed liquor in the 3 anaerobic reactors at the stirring speed of 350 rpm; then adding furanone additives into the anaerobic reactors of the group B and the group C respectively to ensure that the final furanone concentrations in the mixed liquor of the anaerobic reactors of the group B and the group C are respectively 50mg/L and 100mg/L, wherein the furanone additive is not added into the group A, namely the final furanone concentration in the mixed liquor of the anaerobic reactors of the group A is 0, and the negative control is used;
3) after the mixed solution in the 3 anaerobic reactors is fully stirred for 30 minutes, respectively adding new membrane components into the 3 anaerobic reactors to start to prepare for reaction;
4) and (3) respectively introducing simulated municipal sewage into the anaerobic reactors of the group A, the group B and the group C, performing anaerobic degradation treatment at the rotating speed of 350rpm, and continuously discharging treated clear water under the suction action of a suction pump through the filtering action of the flat membrane component. Wherein, in the process of continuous water outlet of the membrane module, the transmembrane pressure difference TMP value in the process of water outlet of the membrane module also slowly rises along with the time, and the value is automatically recorded by the microcomputer system every one minute. When the TMP value of the anaerobic reactor reaches 30kPa, taking out the polluted membrane from the reactor, replacing a new membrane, continuously operating the anaerobic reactor, testing the polluted membrane, and then carrying out physical and chemical cleaning, wherein the cleaning process comprises the following steps: after being washed by clean water, the membrane is soaked in a sodium hypochlorite solution of 500 mg/L for at least 12 h.
In the experimental process, the experimental conditions of the anaerobic reactors in the groups A, B and C are as follows: in 3 anaerobic reactors, the suspended solid concentration MLSS of the anaerobic flocculent sludge is kept at about 6000mg/L, and the solid retention time SRT of the sludge is 20 days; the Hydraulic Retention Time (HRT) of municipal sewage in the anaerobic reactor was simulated to be 17 hours. The temperature of the mixed liquid in the anaerobic reactor is 25.0 +/-2.0 ℃, and the pH value is 7.2 +/-0.2. The membrane component in the anaerobic reactor adopts a flat membrane, the flat membrane is made of polyvinylidene fluoride (PVDF), the standard aperture is 0.1 mu m, and the specific surface area is 0.01m2The membrane module is shown as 6L m-2 h-1The flux of (c) continues to exit the water. The transmembrane pressure (TMP) was measured using a manometer and recorded by a microcomputer every one minute, with each experimental cycle ending when the TMP reached 30 kPa.
In this example 1, the experiment in-process used simulation municipal sewage as the influent of AnMBR, contained in every 1L of simulation municipal sewage: 205mg of glucose, 15mg of ammonium chloride, 62mg of peptone, 6.2mg of potassium dihydrogen phosphate, 21mg of beef extract, 500mg of sodium bicarbonate, 0.06mg of nickel chloride, 0.05mg of ammonium molybdate, 0.1mg of manganese chloride, 0.3mg of cobalt chloride and 2mg of ferrous chloride. The Chemical Oxygen Demand (COD) of the inlet water and the outlet water is used as an index parameter, and the COD of the prepared simulated municipal sewage is 300 +/-20 mg/L.
In the application of the anaerobic reactors of group A, group B and group C of example 1 to municipal sewage treatment, the above-prepared simulated municipal sewage was divided into 3 portions on average, and labeled as group A, group B and group C, respectively. Wherein, furanone additives are respectively added into the simulated municipal sewage of the group B and the group C, so that the final furanone concentration in the simulated municipal sewage of the group B and the group C is respectively 50mg/L and 100 mg/L. And the simulated municipal sewage of the group A is not added with furanone, namely the final concentration of the furanone in the simulated municipal sewage of the group A is 0 and is used as a negative control.
In the process of applying the anaerobic reactors of groups A, B and C in example 1 to municipal sewage treatment, the simulated municipal sewage of groups A, B and C are respectively introduced into the anaerobic reactors of groups A, B and C for experiments, that is, the concentration of furanone in each anaerobic reactor is the same as that of furanone in the feed water.
In the experiments of the anaerobic reactors of the group A, the group B and the group C, after the experiments are stable, the COD of the water continuously discharged by the membrane modules is within the range of 30 +/-10 mg/L. The furanone concentration of the continuous effluent of the anaerobic reactor B group is basically below 8 mg/L, and the furanone concentration of the continuous effluent of the anaerobic reactor C group is basically below 14 mg/L.
In the experiment, the change of transmembrane pressure difference of three groups of completely mixed anaerobic membrane bioreactors AnMBR which run in parallel under the condition that the furanone concentration is 0mg/L, 50mg/L and 100mg/L respectively along with the time is shown in a graph in figure 2. As can be seen from FIG. 2, the furanone concentrations were 4, 5 and 7 days at filtration cycles of 0mg/L, 50mg/L and 100mg/L, respectively. The initial adding concentration of furanone in the anaerobic reactor is 100mg/L, and the filtering period of the AnMBR under the adding amount of 100mg/L furanone of inlet water is 175% of the filtering period of a control group without adding furanone, which indicates that the furanone can obviously slow down the membrane pollution of the AnMBR, greatly reduces the membrane cleaning frequency and saves the operation cost.
When the TMP value of the anaerobic reactor reaches 30kPa, the end of one experiment is marked. After running for three periods, the experiment is finished, and the microbial communities and the compositions of anaerobic sludge of the three groups of AnMBR devices are characterized by a high-throughput sequencing technology. According to the detection result, the sludge mixed phylum strains with higher relative abundance (the relative abundance is the number proportion occupied by each dominant strain in the sample) are Proteobacteria, Firmicutes, Bacterodotta, Chroflexi and Synergistota respectively.
In the sludge mixed liquor of the anaerobic reactor group A, the relative abundance of the strains of phylum Proteobacteria, Firmicutes, Bacterodota, Chroflexi and Synergistota is respectively 13.98%, 20.88%, 16.24%, 10.59% and 11.21%.
In the sludge mixed liquor of the anaerobic reactor B, the relative abundance of the strains of the phylum Proteobacteria, Firmicutes, Bacterodota, Chroflexi and Synergistota is 17.86 percent, 16.95 percent, 17.49 percent, 11.37 percent and 7.18 percent respectively.
In the sludge mixed liquor of the anaerobic reactor group C, the relative abundance of the strains of phylum Proteobacteria, Firmicutes, Bacterodota, Chroflexi and Synergistota is respectively 28.10%, 15.63%, 18.24%, 5.44% and 2.68%.
It should be noted that the relative abundances of Firmicutes in the sludge mixed liquor of the anaerobic reactors of the A group, the B group and the C group are respectively 20.88%, 16.95% and 15.63%. This indicates that the addition of furanones has an inhibitory effect on the growth of Firmicutes, a typical bacterium that is prone to biofilm formation in AnMBR.
In addition, the relative abundance of the heterotrophic bacteria gate (Synergistota) in the sludge mixed liquor of the anaerobic reactors of group a, group B and group C was 11.21%, 7.18% and 2.68%, respectively. The role of synergestta in anaerobic reactors is to hydrolyze amino acids to acetic acid, the decrease in relative abundance of which is attributed to the decrease in organic compound content within the reactor system, which is beneficial in mitigating membrane fouling. Thus, inhibition of firmicutes and syntrophic mycoderm biofilm formation by furanones may be a major cause of slow membrane fouling.
To further establish the relationship between microbial communities and biological contamination in AnMBR, the generic species in the sludge mixed liquor of anaerobic reactors of groups a, B and C were analyzed:
in the sludge mixed liquor of the anaerobic reactor A, the relative abundances of Trichococcus, Enterobacter and Lactivibrio strains are 14.93 percent, 4.63 percent and 7.44 percent respectively.
In the sludge mixed liquor of the anaerobic reactor B, the relative abundance of Trichococcus, Enterobacter and Lactivibrio strains is respectively 7.75%, 4.84% and 3.12%.
In the sludge mixed liquor of the anaerobic reactor group C, the relative abundance of Trichococcus, Enterobacter and Lactivibrio strains is respectively 8.29 percent, 13.81 percent and 1.41 percent.
It should be noted that the relative abundance of tricholobus (Trichococcus) in the sludge mixed liquor of the anaerobic reactors of group a, group B and group C is 14.93%, 7.75% and 8.29%, respectively. While the genus trichococcus is involved in the conversion of carbohydrates to lactic acid and acetate, which may be a major contributor to membrane fouling.
In addition, in the sludge mixed liquor of the anaerobic reactors in the groups A, B and C, the relative abundance of lactobacillus (Lactivibrio) is 7.44%, 3.12% and 1.41%, and the lactobacillus is closely related to membrane pollution. Thus, inhibition of growth of the genus trichococcus and lactobacillus by furanones may be the primary cause of reduced membrane fouling.
In summary, furanones have been found to inhibit the growth of a wide variety of bacteria in complex systems (e.g., AnMBR) in this study. The microbial agent has the specific expression that the microbial agent has an inhibition effect on the growth of Firmicutes, syntrophic bacteroides, Trichococcus and lactobacillus, thereby effectively inhibiting the formation of a biological membrane and slowing down the membrane pollution of AnMBR.
In the experimental process, the invention discovers that the furanone concentration of the continuous effluent of the anaerobic reactors in the B group and the C group is kept at a low level, which shows that the furanone additive is effectively utilized by complex strains in AnMBR in the process of simulating municipal sewage for treatment, and the reason is probably that: the furanone additive has specific inhibition selectivity, a strain system in the anaerobic flocculent sludge is complex, the furanone additive does not generate inhibition on all strains in the anaerobic reactor, and has better inhibition effect on bacteria such as Firmicutes and the like which are easy to form a biological membrane.
The statements in this specification merely set forth a list of implementations of the inventive concept and the scope of the present invention should not be construed as limited to the particular forms set forth in the examples.
Claims (9)
1. A method for reducing membrane pollution by utilizing a quorum sensing inhibitor furanone in a municipal sewage treatment process based on an anaerobic membrane bioreactor is characterized by comprising the following steps: the method comprises the following steps of (1) treating municipal sewage by adopting a completely mixed anaerobic membrane bioreactor (AnMBR), wherein the AnMBR comprises an anaerobic reactor containing an immersed membrane module, a water outlet of the membrane module is connected with a suction pump through a pipeline, a pressure gauge is arranged on the pipeline between the water outlet of the membrane module and the suction pump, and a stirrer for stirring mixed liquor in the anaerobic reactor is also arranged on the anaerobic reactor;
in the municipal sewage treatment process, anaerobic flocculent sludge containing anaerobic strains is inoculated in an anaerobic reactor, wherein the anaerobic strains comprise Proteobacteria, Firmicutes, bacteroideta, Chloroflexi and Synergistota; the method comprises the steps of adding furanone into municipal sewage in advance, uniformly mixing, introducing into an anaerobic reactor, carrying out anaerobic degradation treatment under stirring, and continuously discharging treated clear water under the pumping action of a suction pump through the filtering action of a membrane component.
2. The method of claim 1 for reducing membrane fouling using a quorum sensing inhibitor furanone in an AnMBR-based municipal wastewater treatment process, wherein: in the municipal sewage treatment process, the transmembrane pressure difference TMP in the water outlet process of the membrane module is measured by the pressure gauge, when the TMP measured by the pressure gauge reaches 30kPa, the polluted membrane module is taken out of the anaerobic reactor, a new membrane module is replaced, then the anaerobic reactor continues to operate, and the polluted membrane module is cleaned.
3. The method of claim 2 for reducing membrane fouling using a quorum sensing inhibitor furanone in an AnMBR-based municipal sewage treatment process, wherein: the process of cleaning the polluted membrane assembly comprises the following steps: after being washed by clean water, the membrane component is soaked in a sodium hypochlorite solution of 400-600 mg/L for at least 12 h; the concentration of furanone added into municipal sewage is 50-120 mg/L, preferably 80-100 mg/L.
4. The method of claim 1 for reducing membrane fouling using a quorum sensing inhibitor furanone in an AnMBR-based municipal wastewater treatment process, wherein: in the municipal sewage treatment process, the suspended solid concentration MLSS of the anaerobic flocculent sludge in the anaerobic reactor is kept between 5000-6000mg/L, and the solid retention time SRT of the sludge is 15-30 days; the hydraulic retention time HRT of the municipal sewage added with the furanone in the anaerobic reactor is 15-25 hours.
5. The method of claim 1 for reducing membrane fouling using a quorum sensing inhibitor furanone in an AnMBR-based municipal wastewater treatment process, wherein: in the municipal sewage treatment process, the temperature of the mixed liquid in the anaerobic reactor is 20-35 ℃, the pH value is within the range of 6.7-7.4, and the stirring speed is 200-400 rpm.
6. The method of claim 1 for reducing membrane fouling using a quorum sensing inhibitor furanone in an AnMBR-based municipal sewage treatment process, wherein: the membrane component is a flat membrane, the flat membrane is made of polyvinylidene fluoride PVDF (polyvinylidene fluoride), the pore diameter of the flat membrane is 0.08-0.15 mu m, and the membrane component is 5-8L m-2 h-1The flux of (c) continues to exit the water.
7. The method of claim 1 for reducing membrane fouling using a quorum sensing inhibitor furanone in an AnMBR-based municipal sewage treatment process, wherein: the anaerobic flocculent sludge containing the anaerobic strain is prepared by domesticating the following steps: anaerobic sludge is used as inoculation sludge, after the inoculation sludge is added into municipal sewage, the municipal sewage is domesticated and cultured for 15 to 25 hours in an anaerobic state, and after 15 to 25 hours, new municipal sewage is replaced, and the circular operation is carried out for 13 to 25 days; and (4) storing the anaerobic sludge obtained by domestication culture in an anaerobic environment to obtain the anaerobic flocculent sludge containing the anaerobic strains and suitable for treating municipal sewage.
8. The method of claim 7 for reducing membrane fouling using the quorum sensing inhibitor furanone in AnMBR-based municipal wastewater treatment processes, wherein: when the inoculated sludge is added into the municipal sewage for acclimatization culture, the suspended solid concentration MLSS of the inoculated sludge in the municipal sewage is controlled between 5000 and 6000 mg/L.
9. The method of claim 1 for reducing membrane fouling using a quorum sensing inhibitor furanone in an AnMBR-based municipal wastewater treatment process, wherein: the COD value of the municipal sewage is 300 +/-50 mg/L, and the COD value of the clear water after the treatment is continuously discharged through the membrane module is 30 +/-10 mg/L.
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| CN113413764A (en) * | 2021-06-24 | 2021-09-21 | 南京财经大学 | Modified membrane module, preparation method thereof and application thereof in filtration |
| CN116354506A (en) * | 2023-03-21 | 2023-06-30 | 北京工业大学 | Method for realizing heterotrophic nitrification-aerobic denitrification high-efficiency denitrification through stress of high-concentration quorum sensing inhibitor |
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| CN113413764A (en) * | 2021-06-24 | 2021-09-21 | 南京财经大学 | Modified membrane module, preparation method thereof and application thereof in filtration |
| CN116354506A (en) * | 2023-03-21 | 2023-06-30 | 北京工业大学 | Method for realizing heterotrophic nitrification-aerobic denitrification high-efficiency denitrification through stress of high-concentration quorum sensing inhibitor |
| CN116354506B (en) * | 2023-03-21 | 2024-01-19 | 北京工业大学 | Method for realizing heterotrophic nitrification-aerobic denitrification high-efficiency denitrification through stress of high-concentration quorum sensing inhibitor |
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