CN102583781A - Compound bacterium agent/immobilized cell microorganism method for treating polyester wastewater - Google Patents
Compound bacterium agent/immobilized cell microorganism method for treating polyester wastewater Download PDFInfo
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- CN102583781A CN102583781A CN2012100692997A CN201210069299A CN102583781A CN 102583781 A CN102583781 A CN 102583781A CN 2012100692997 A CN2012100692997 A CN 2012100692997A CN 201210069299 A CN201210069299 A CN 201210069299A CN 102583781 A CN102583781 A CN 102583781A
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Abstract
The invention discloses a compound bacterium agent/immobilized cell microorganism method for treating polyester wastewater. The method comprises the following steps of: pretreating kieselguhr; culturing a compound bacterium agent conventionally, soaking the pretreated kieselguhr in a bacterial liquid, performing submerged aeration, fixing a strain for 48 to 120 hours, filtering off the bacterial liquid to obtain a kieselguhr immobilized compound strain, filling the kieselguhr immobilized compound strain in a cylindrical reactor in a bio-tower, injecting a fresh medium to activate for 24 to 72 hours, and washing off the residual culture solution; and introducing the polyester wastewater, and performing biochemical aeration treatment. According to the method, the kieselguhr is taken as a carrier, the concentration of the compound strain in the carrier is high, the compound strain in the carrier is hard to lose, and the degradation efficiency of the compound bacterium agent is further improved; and after kieselguhr is mixed with polyethyleneimine further, the surface of the kieselguhr has a strong positive ion characteristic, so that the compound bacterium agent immobilized on the kieselguhr has a good degradation effect.
Description
Technical field
The present invention relates to the industrial wastewater treatment field, relate in particular to the method that a kind of composite fungus agent/immobilized cell microbial method is administered polyester waste water.
Background technology
In recent decades, along with the application of sewage irrigation measure in discharging and the agricultural of industry, sanitary wastewater, a large amount of deleterious organic chemicalss are released in the environment.The ecological environmental pollution problem has become the restraining factors of Economic development, in the modern agriculture production owing to use chemical pesticide to cause pesticide residual contamination in a large number to the control of disease and pest; The discharging of a large amount of undressed chemical industry waste water causes the rivers and lakes serious environmental to pollute in the industry, and our survival environment is caused severe threat.The biodegradable research and the application of contaminate environment seem day by day urgent and important.These organic pollutants mainly comprise phenols, halogenated organic matters, Ppolynuclear aromatic, nitro-compound etc., and wherein arene compounds is main organic pollutant, and it mainly comprises phenol and polycyclic aromatic hydrocarbons.Arene compounds extensively is present in atmosphere, soil and the water body; Be the main objectionable constituent of environmental pollutant, have chronic toxicity and carcinogenic, teratogenesis, mutagenic " three cause " effect, these compounds are in water body and soil entering plant materials; And then by animal and absorption of human body; Through bioconcentration, have a strong impact on ecotope and human health, classified as the environmental pollutant of preferential control by many countries.Especially in recent years; The fast development of automobile, electronics, building and metallurgical industry impels arene compounds, particularly the derived product increase in demand of phenol; Cause the harm of phenol to aggravate day by day, arene compounds has been classified as the environmental pollutant of preferential control by many countries at present.
Polyester (PET) is the abbreviation of polyethylene terephthalate.Being made through polycondensation repeatedly by terephthalic acid and terepthaloyl moietie, is a kind of important chemical product, and except traditional trevira, PET is replacing SE aspect a lot, be the main bottled material of mineral water and various beverages.Organic pollutant composition in the polyester waste water comprises phenol, phthalate, and oxygen helerocyclics and alkynes class, alcohols and long-chain fat compounds of group are a kind of more unmanageable wastewater from chemical industry.Biological reinforcing technology is through in indigenous flora, adding one or more high-effective microorganisms, to strengthen the degraded to the object removal thing, producing a kind of technology that keeps system stability under the impact of burst or successive high loading.In recent years; Though the biological reinforced processing to polyester waste water is used to some extent, however less to the microbiobacterial agent kind of polyester waste water processing usefulness specially, yet there are a lot of problems; The wherein main problem that exists is that specific aim is not strong, so that not remarkable to the strengthening effect of polyester waste water.In addition, improvement method commonly used is activated sludge process normally, has that thalline is prone to run off, microorganism concn is low, degradation speed reaches slowly and produce a large amount of mud and cause secondary pollution problems.
Summary of the invention
The objective of the invention is to deficiency, the method that a kind of stability is high, composite fungus agent/immobilized cell microbial method of good degrading effect is administered polyester waste water is provided to above-mentioned prior art existence.
The objective of the invention is to realize through following technical scheme:
The present invention relates to a kind of composite fungus agent/immobilized cell microbial method and administer the method for polyester waste water, comprise the steps:
A, zeyssatite pre-treatment: zeyssatite is put in the zero(ppm) water, stirred, behind sodium hydroxide solution adjusting pH value to 7.0～7.2, zero(ppm) water rinsing, drying;
B, composite fungus agent is carried out routine cultivate, pretreated zeyssatite among the step a is soaked in the bacterium liquid, 25～35 ℃ of bacterium liquid temps, pH value are 7.0～7.2, vexed exposing to the sun, and fixing bacterial classification 48～120h, elimination bacterium liquid obtains the immobilized composite bacteria of zeyssatite;
C, the immobilized composite bacteria of the zeyssatite that makes among the step b is inserted in the cylindrical reactor in the tower biological filter, injected fresh culture and carry out activation 24～72h, zero(ppm) water flush away residual culture; Then feed polyester waste water, carry out aeration biochemical and handle.
Zeyssatite is by after ancient times, unicellular lower plant diatom remains were piled up, and what form through Diagn a kind ofly has porous biological silicite.It is made up of the wall shell of diatom, has micropore multistage in a large number, ordered arrangement on the wall shell.The microvoid structure of this uniqueness has determined it to can be used for the carrier as fixed cell.
Preferably, said composite fungus agent makes through following steps:
1), primary seed solution preparation: phenol degrading bacterium, long chain alkane degradation bacteria, phthalic acid degradation bacteria are inoculated into respectively in the Erlenmeyer flask that aseptic LB liquid nutrient medium is housed; Corresponding respectively again phenol, the hybrid long chain alkane of 600～800ml/L and the phthalic acid dibutyl ester of 300～500ml/L that adds 500～600ml/L; Regulate substratum pH value to 7.2; Shaking table is cultivated 20～24h, makes the primary seed solution of each bacterial classification; Said hybrid long chain alkane is that volume ratio is 1: 1: 1 n-hexacosane, heptacosane and a positive octacosane;
2), secondary seed solution fermentation culture: prepared each the bacterial classification primary seed solution of step 1) is inserted each fermentor tank by the inoculum size of each fermentor tank volume 10～15% respectively; The same step 1) of the used aseptic LB liquid nutrient medium of each fermentor tank; The corresponding phenol that adds 500～600ml/L in each fermentor tank respectively again; The volume ratio of 600～800ml/L is 1: 1: 1 n-hexacosane, heptacosane and a positive octacosane, the phthalic acid dibutyl ester of 300～500ml/L; The fermentor tank state is 25～35 ℃, and 150～200rpm feeds sterile air, and air flow is 0.8～1 times/min of fermentor tank volume, and pressure is 0.1～0.15Mpa, and fermentation 30～36h makes the secondary seed solution of each bacterial classification;
3), with step 2) secondary seed solution of each bacterial classification of making respectively at 4 ℃ with the 5000r/min condition under centrifugal 10min, the supernatant that inclines, respectively with the SPSS washing, centrifugal under similarity condition respectively then again, 2～3 times repeatedly; Mix again, make said function composite fungus agent; The weight percent content of each bacterial classification is respectively in the said function composite fungus agent: phenol degrading bacterium 15～30%, long chain alkane degradation bacteria 35～65%, phthalic acid degradation bacteria 15～35%.
Preferably; Said phenol degrading bacterium is Rhodopseudomonas (Pseudomonas sp.); Said long chain alkane degradation bacteria is Pseudomonas aeruginosa 1785 (" JOURNAL OF MICROBIOLOGY " 2005 the 6th phase); Said phthalic acid degradation bacteria is Comomonas acidovorans Fy-1 (" using and the environmental organism journal ", 2004,10 (5): 643～646).
Preferably, said phenol degrading bacterium is that seed selection obtains from the active sludge of polyester waste water.
Preferably, the zeyssatite pre-treatment among the said step a also comprises the steps: dried zeyssatite is added in the polyethyleneimine: amine aqueous solution, stirs, left standstill 5～6 days, and the zero(ppm) water rinsing, 45～50 ℃ of dryings get final product; The mol ratio of said zeyssatite and polymine is 1: 0.2～0.5.
Compared with prior art, the present invention has following beneficial effect:
1, the composite fungus agent of the present invention's employing is through optimizing the composite fungus agent that assembly goes out; It has the efficient degradation ability to the various hardly degraded organic substances in the polyester waste water; Through the synergy between different strain, guarantee to reach national grade one discharge standard after polyester waste water is handled.
2, adopt zeyssatite as carrier, composite bacteria concentration is high in the carrier, is difficult for running off, and has further improved the degradation efficiency of this composite fungus agent; Especially with zeyssatite after the polymine combination treatment; Make the zeyssatite surface have strong positive ion characteristic; In neutral solution; Interact at the sight spot down collaborative with hydrogen bond of its particulate can produce intensive capture effect to phenol in the polyester waste water and long chain alkane, makes that the fixed composite fungus agent has been given play to better degradation effect on it.
Embodiment
Below in conjunction with specific embodiment technical scheme of the present invention is described in detail.Following examples are to further specify of the present invention, rather than limit scope of the present invention.
Below the composite fungus agent that adopts of each embodiment make through following steps:
1), primary seed solution preparation: phenol degrading bacterium, long chain alkane degradation bacteria, phthalic acid degradation bacteria are inoculated into respectively in the Erlenmeyer flask that aseptic LB liquid nutrient medium is housed; Corresponding respectively again phenol, the hybrid long chain alkane of 600～800ml/L and the phthalic acid dibutyl ester of 300～500ml/L that adds 500～600ml/L; Regulate substratum pH value to 7.2; Shaking table is cultivated 20～24h, makes the primary seed solution of each bacterial classification; Said hybrid long chain alkane is that volume ratio is 1: 1: 1 n-hexacosane, heptacosane and a positive octacosane;
2), secondary seed solution fermentation culture: prepared each the bacterial classification primary seed solution of step 1) is inserted each fermentor tank by the inoculum size of each fermentor tank volume 10～15% respectively; The same step 1) of the used aseptic LB liquid nutrient medium of each fermentor tank; The corresponding phenol that adds 500～600ml/L in each fermentor tank respectively again; The volume ratio of 600～800ml/L is 1: 1: 1 n-hexacosane, heptacosane and a positive octacosane, the phthalic acid dibutyl ester of 300～500ml/L; The fermentor tank state is 25～35 ℃, and 150～200rpm feeds sterile air, and air flow is 0.8～1 times/min of fermentor tank volume, and pressure is 0.1～0.15Mpa, and fermentation 30～36h makes the secondary seed solution of each bacterial classification;
3), with step 2) secondary seed solution of each bacterial classification of making respectively at 4 ℃ with the 5000r/min condition under centrifugal 10min, the supernatant that inclines, respectively with the SPSS washing, centrifugal under similarity condition respectively then again, 2～3 times repeatedly; Mix again, make said function composite fungus agent; The weight percent content of each bacterial classification is respectively in the said function composite fungus agent: phenol degrading bacterium 15～30%, long chain alkane degradation bacteria 35～65%, phthalic acid degradation bacteria 15～35%.
Wherein, Said phenol degrading bacterium is the Rhodopseudomonas that seed selection obtains from the active sludge of polyester waste water (Pseudomonas sp.); Said long chain alkane degradation bacteria is Pseudomonas aeruginosa 1785, and said phthalic acid degradation bacteria is Comomonas acidovorans Fy-1.
Embodiment 1
A kind of composite fungus agent/immobilized cell microbial method is administered the method for polyester waste water, comprises the steps:
A, zeyssatite pre-treatment: zeyssatite is put in the zero(ppm) water, stirred, behind sodium hydroxide solution adjusting pH value to 7.0, zero(ppm) water rinsing, drying;
B, composite fungus agent is carried out routine cultivate, pretreated zeyssatite among the step a is soaked in the bacterium liquid, 25 ℃ of bacterium liquid temps, pH value are 7.0, vexed exposing to the sun, and fixing bacterial classification 120h, elimination bacterium liquid obtains the immobilized composite bacteria of zeyssatite;
C, the immobilized composite bacteria of the zeyssatite that makes among the step b is inserted in the cylindrical reactor in the tower biological filter, injected fresh culture and carry out activation 72h, zero(ppm) water flush away residual culture; Then feed polyester waste water, carry out aeration biochemical and handle.
(water-in COD MV is 1578mg/L to feed certain cotton factory polyester waste water; The water-in phenol concentration is that 70mg/L, phthalic acid dibutyl ester concentration are that 85mg/L, long chain alkane concentration are 150mg/L); 30 ℃ of wastewater temperatures, PH7.0 is by supplying polyester waste water per ton to feed 100m
3Air carry out aeration biochemical and handle.Water outlet COD is 120mg/L, and the water outlet phenol concentration is that 0.7mg/L, phthalic acid dibutyl ester concentration are that 0.8mg/L, long chain alkane concentration are 1.2mg/L, and the COD clearance reaches 92.4%.Effluent quality reaches national grade one discharge standard.
Embodiment 2
A kind of composite fungus agent/immobilized cell microbial method is administered the method for polyester waste water, comprises the steps:
A, zeyssatite pre-treatment: zeyssatite is put in the zero(ppm) water, stirred, behind sodium hydroxide solution adjusting pH value to 7.0, zero(ppm) water rinsing, drying; Dried zeyssatite is added in the polyethyleneimine: amine aqueous solution, stir, left standstill 5 days, the zero(ppm) water rinsing, 45 ℃ of dryings get final product; The mol ratio of said zeyssatite and polymine is 1: 0.5;
B, composite fungus agent is carried out routine cultivate, pretreated zeyssatite among the step a is soaked in the bacterium liquid, 25 ℃ of bacterium liquid temps, pH value are 7.0, vexed exposing to the sun, and fixing bacterial classification 120h, elimination bacterium liquid obtains the immobilized composite bacteria of zeyssatite;
C, the immobilized composite bacteria of the zeyssatite that makes among the step b is inserted in the cylindrical reactor in the tower biological filter, injected fresh culture and carry out activation 72h, zero(ppm) water flush away residual culture; Then feed polyester waste water, carry out aeration biochemical and handle.
(water-in COD MV is 1578mg/L to feed certain cotton factory polyester waste water; The water-in phenol concentration is that 70mg/L, phthalic acid dibutyl ester concentration are that 85mg/L, long chain alkane concentration are 150mg/L); 30 ℃ of wastewater temperatures, PH7.0 is by supplying polyester waste water per ton to feed 100m
3Air carry out aeration biochemical and handle.Water outlet COD is 38mg/L, and the water outlet phenol concentration is that 0.3mg/L, phthalic acid dibutyl ester concentration are that 0.3mg/L, long chain alkane concentration are 0.5mg/L, and the COD clearance reaches 97.6%.Effluent quality reaches national grade one discharge standard.
Embodiment 3
A kind of composite fungus agent/immobilized cell microbial method is administered the method for polyester waste water, comprises the steps:
A, zeyssatite pre-treatment: zeyssatite is put in the zero(ppm) water, stirred, behind sodium hydroxide solution adjusting pH value to 7.2, zero(ppm) water rinsing, drying; Dried zeyssatite is added in the polyethyleneimine: amine aqueous solution, stir, left standstill 6 days, the zero(ppm) water rinsing, 50 ℃ of dryings get final product; The mol ratio of said zeyssatite and polymine is 1: 0.2;
B, composite fungus agent is carried out routine cultivate, pretreated zeyssatite among the step a is soaked in the bacterium liquid, 35 ℃ of bacterium liquid temps, pH value are 7.2, vexed exposing to the sun, and fixing bacterial classification 48h, elimination bacterium liquid obtains the immobilized composite bacteria of zeyssatite;
C, the immobilized composite bacteria of the zeyssatite that makes among the step b is inserted in the cylindrical reactor in the tower biological filter, injected fresh culture and carry out activation 24h, zero(ppm) water flush away residual culture; Then feed polyester waste water, carry out aeration biochemical and handle.
(water-in COD MV is 1578mg/L to feed certain cotton factory polyester waste water; The water-in phenol concentration is that 70mg/L, phthalic acid dibutyl ester concentration are that 85mg/L, long chain alkane concentration are 150mg/L); 35 ℃ of wastewater temperatures, PH7.2 is by supplying polyester waste water per ton to feed 100m
3Air carry out aeration biochemical and handle.Water outlet COD is 79mg/L, and the water outlet phenol concentration is that 0.5mg/L, phthalic acid dibutyl ester concentration are that 0.6mg/L, long chain alkane concentration are 0.7mg/L, and the COD clearance reaches 95%.Effluent quality reaches national grade one discharge standard.
Embodiment 4
A kind of composite fungus agent/immobilized cell microbial method is administered the method for polyester waste water, comprises the steps:
A, zeyssatite pre-treatment: zeyssatite is put in the zero(ppm) water, stirred, behind sodium hydroxide solution adjusting pH value to 7.1, zero(ppm) water rinsing, drying; Dried zeyssatite is added in the polyethyleneimine: amine aqueous solution, stir, left standstill 5 days, the zero(ppm) water rinsing, 48 ℃ of dryings get final product; The mol ratio of said zeyssatite and polymine is 1: 0.4;
B, composite fungus agent is carried out routine cultivate, pretreated zeyssatite among the step a is soaked in the bacterium liquid, 30 ℃ of bacterium liquid temps, pH value are 7.0, vexed exposing to the sun, and fixing bacterial classification 72h, elimination bacterium liquid obtains the immobilized composite bacteria of zeyssatite;
C, the immobilized composite bacteria of the zeyssatite that makes among the step b is inserted in the cylindrical reactor in the tower biological filter, injected fresh culture and carry out activation 48h, zero(ppm) water flush away residual culture; Then feed polyester waste water, carry out aeration biochemical and handle.
(water-in COD MV is 1578mg/L to feed certain cotton factory polyester waste water; The water-in phenol concentration is that 70mg/L, phthalic acid dibutyl ester concentration are that 85mg/L, long chain alkane concentration are 150mg/L); 30 ℃ of wastewater temperatures, PH7.0 is by supplying polyester waste water per ton to feed 100m
3Air carry out aeration biochemical and handle.Water outlet COD is 65mg/L, and the water outlet phenol concentration is that 0.4mg/L, phthalic acid dibutyl ester concentration are that 0.4mg/L, long chain alkane concentration are 0.6mg/L, and the COD clearance reaches 95.9%.Effluent quality reaches national grade one discharge standard.
In sum, adopt zeyssatite as carrier, composite bacteria concentration is high in the carrier, is difficult for running off, and has further improved the degradation efficiency of this composite fungus agent, can reach national grade one discharge standard after making polyester waste water handle.Further comparing embodiment 1,2 can be known; The degradation effect of the COD clearance of embodiment 2 and phenol, phthalic acid dibutyl ester, long chain alkane is greatly improved; This be since with zeyssatite after the polymine combination treatment; Make the zeyssatite surface have strong positive ion characteristic, in neutral solution, its particulate is down collaborative electrostatic interaction and hydrogen bond; Can produce intensive capture effect to the phenol in the polyester waste water and long chain alkane, make that the fixed composite fungus agent has been given play to better degradation effect on it.
Claims (5)
1. the method that composite fungus agent/immobilized cell microbial method is administered polyester waste water is characterized in that, comprises the steps:
A, zeyssatite pre-treatment: zeyssatite is put in the zero(ppm) water, stirred, behind sodium hydroxide solution adjusting pH value to 7.0～7.2, zero(ppm) water rinsing, drying;
B, composite fungus agent is carried out routine cultivate, pretreated zeyssatite among the step a is soaked in the bacterium liquid, 25～35 ℃ of bacterium liquid temps, pH value are 7.0～7.2, vexed exposing to the sun, and fixing bacterial classification 48～120h, elimination bacterium liquid obtains the immobilized composite bacteria of zeyssatite;
C, the immobilized composite bacteria of the zeyssatite that makes among the step b is inserted in the cylindrical reactor in the tower biological filter, injected fresh culture and carry out activation 24～72h, zero(ppm) water flush away residual culture; Then feed polyester waste water, carry out aeration biochemical and handle.
2. composite fungus agent according to claim 1/immobilized cell microbial method is administered the method for polyester waste water, it is characterized in that said composite fungus agent makes through following steps:
1), primary seed solution preparation: phenol degrading bacterium, long chain alkane degradation bacteria, phthalic acid degradation bacteria are inoculated into respectively in the Erlenmeyer flask that aseptic LB liquid nutrient medium is housed; Corresponding respectively again phenol, the hybrid long chain alkane of 600～800ml/L and the phthalic acid dibutyl ester of 300～500ml/L that adds 500～600ml/L; Regulate substratum pH value to 7.2; Shaking table is cultivated 20～24h, makes the primary seed solution of each bacterial classification; Said hybrid long chain alkane is that volume ratio is 1: 1: 1 n-hexacosane, heptacosane and a positive octacosane;
2), secondary seed solution fermentation culture: prepared each the bacterial classification primary seed solution of step 1) is inserted each fermentor tank by the inoculum size of each fermentor tank volume 10～15% respectively; The same step 1) of the used aseptic LB liquid nutrient medium of each fermentor tank; The corresponding phenol that adds 500～600ml/L in each fermentor tank respectively again; The volume ratio of 600～800ml/L is 1: 1: 1 n-hexacosane, heptacosane and a positive octacosane, the phthalic acid dibutyl ester of 300～500ml/L; The fermentor tank state is 25～35 ℃, and 150～200rpm feeds sterile air, and air flow is 0.8～1 times/min of fermentor tank volume, and pressure is 0.1～0.15Mpa, and fermentation 30～36h makes the secondary seed solution of each bacterial classification;
3), with step 2) secondary seed solution of each bacterial classification of making respectively at 4 ℃ with the 5000r/min condition under centrifugal 10min, the supernatant that inclines, respectively with the SPSS washing, centrifugal under similarity condition respectively then again, 2～3 times repeatedly; Mix again, make said function composite fungus agent; The weight percent content of each bacterial classification is respectively in the said function composite fungus agent: phenol degrading bacterium 15～30%, long chain alkane degradation bacteria 35～65%, phthalic acid degradation bacteria 15～35%.
3. composite fungus agent according to claim 2/immobilized cell microbial method is administered the method for polyester waste water; It is characterized in that; Said phenol degrading bacterium is Rhodopseudomonas (Pseudomonass sp.); Said long chain alkane degradation bacteria is Pseudomonas aeruginosa 1785, and said phthalic acid degradation bacteria is Comomonas acidovorans Fy-1.
4. composite fungus agent according to claim 3/immobilized cell microbial method is administered the method for polyester waste water, it is characterized in that said phenol degrading bacterium is that seed selection obtains from the active sludge of polyester waste water.
5. administer the method for polyester waste water according to each described composite fungus agent in the claim 1～4/immobilized cell microbial method; It is characterized in that the zeyssatite pre-treatment among the said step a also comprises the steps: dried zeyssatite is added in the polyethyleneimine: amine aqueous solution, stirs; Left standstill 5～6 days; The zero(ppm) water rinsing, 45～50 ℃ of dryings get final product; The mol ratio of said zeyssatite and polymine is 1: 0.2～0.5.
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| CN105417690A (en) * | 2015-11-17 | 2016-03-23 | 仇颖超 | Culture method of aerobiotic active sludge |
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| US9994470B2 (en) | 2011-03-07 | 2018-06-12 | General Electric Company | Method of removing recalcitrant organic pollutants |
| CN104755435A (en) * | 2012-09-10 | 2015-07-01 | 通用电气公司 | Method of reducing residual recalcitrant organic pollutants |
| US9902636B2 (en) | 2012-09-10 | 2018-02-27 | General Electric Company | Method of reducing residual recalcitrant organic pollutants |
| CN105417690A (en) * | 2015-11-17 | 2016-03-23 | 仇颖超 | Culture method of aerobiotic active sludge |
| CN110709370A (en) * | 2017-02-28 | 2020-01-17 | 德莱特有限公司 | Systems, methods, and apparatus for improving the quality of wastewater effluents and biosolids |
| US11440853B2 (en) | 2017-02-28 | 2022-09-13 | Drylet, Inc. | Systems, methods, and apparatus for increased wastewater effluent and biosolids quality |
| CN108993394A (en) * | 2018-08-17 | 2018-12-14 | 佛山市禅城区诺高环保科技有限公司 | A kind of preparation method of drinking water bamboo charcoal |
| CN114258909A (en) * | 2021-12-14 | 2022-04-01 | 苏州良辰生物医药科技有限公司 | Cell fixing agent and cell fixing method |
| CN114258909B (en) * | 2021-12-14 | 2023-09-22 | 苏州良辰生物医药科技有限公司 | Cell fixing agent and cell fixing method |
| CN118724272A (en) * | 2024-09-02 | 2024-10-01 | 河海大学 | Sulfur autotrophic filler and preparation method thereof |
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