CN110964711A - Acid-resistant microbial capsule embedding liquid, microbial capsule, and preparation methods and applications of microbial capsule embedding liquid and microbial capsule - Google Patents
Acid-resistant microbial capsule embedding liquid, microbial capsule, and preparation methods and applications of microbial capsule embedding liquid and microbial capsule Download PDFInfo
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- MVPPADPHJFYWMZ-UHFFFAOYSA-N chlorobenzene Chemical compound ClC1=CC=CC=C1 MVPPADPHJFYWMZ-UHFFFAOYSA-N 0.000 claims description 22
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- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 claims description 2
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N11/00—Carrier-bound or immobilised enzymes; Carrier-bound or immobilised microbial cells; Preparation thereof
- C12N11/02—Enzymes or microbial cells immobilised on or in an organic carrier
- C12N11/08—Enzymes or microbial cells immobilised on or in an organic carrier the carrier being a synthetic polymer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/84—Biological processes
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N11/00—Carrier-bound or immobilised enzymes; Carrier-bound or immobilised microbial cells; Preparation thereof
- C12N11/02—Enzymes or microbial cells immobilised on or in an organic carrier
- C12N11/10—Enzymes or microbial cells immobilised on or in an organic carrier the carrier being a carbohydrate
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Abstract
The invention discloses an acid-resistant microbial capsule embedding liquid, a microbial capsule, and a preparation method and application thereof, wherein the preparation method of the microbial capsule comprises the following steps: step 1, adding polyvinyl alcohol and sodium alginate into ultrapure water, and heating until the polyvinyl alcohol and the sodium alginate are completely dissolved to obtain a mixed solution; step 2, adding activated carbon powder and a pH buffering agent into the mixed solution and cooling to 30-40 ℃, wherein the mass of the activated carbon powder is 0.9-1.3% of the mass of the mixed solution, and the mass of the pH buffering agent is 1.5-2.5% of the mass of the mixed solution; and 3, adding the cooled mixed solution into the microbial liquid with the same volume, and uniformly mixing to obtain an embedding solution. Dripping the microbial capsule embedding liquid into a saturated boric acid-calcium chloride solution, placing the obtained small balls in the environment of 3-5 ℃ and in the saturated boric acid-calcium chloride solution for crosslinking reaction for 20-30h, taking out the obtained microbial capsules, and cleaning the microbial capsules. The acid-resistant microbial capsules of the invention can withstand lower pH.
Description
Technical Field
The invention relates to the technical field of atmospheric treatment, in particular to acid-resistant microbial capsule embedding liquid, a microbial capsule, and a preparation method and application thereof.
Background
The immobilized microorganism technology is developed from an immobilized enzyme technology, and the technology adopts a physical and chemical method to fix free microorganisms in a limited space, can keep the activity of the microorganisms and can be repeatedly utilized. Compared with the common biotechnology, the immobilized microorganism technology has the advantages of small enzyme activity loss, high microorganism density, less microorganism loss, high reaction speed, strong poison resistance, stronger environmental adaptability, small occupied area of treatment equipment and the like, is widely applied and researched in the environmental field, and particularly in the water treatment field, and has been paid more and more attention in the waste gas treatment field in the last two decades.
Agriculture and animal husbandry, industrial production, and municipal waste treatment utilities all emit a large amount of malodorous pollutants. The malodorous pollutants are important air pollutants, mainly comprising hydrocarbons, oxygen-containing organic matters, sulfur-containing organic matters, nitrogen-containing organic matters, halogens and derivatives thereof and the like, and because the malodorous pollutants have the unique pollution characteristics, the malodorous pollutants not only can influence the psychology and sense organ of living and working people nearby malodorous pollution sources and reduce the working efficiency and the quality of life, but also seriously damage the respiratory system, the digestive system and the nervous system, so that appropriate technical means are necessary to effectively remove the malodorous pollutants in the atmosphere. The biological method for treating malodorous gas has the advantages of economy, no secondary pollution and the like, and is widely applied all the time. Common devices for biological treatment process include biological filter tower, biological trickling filter tower and biological washing tower.
The traditional biological filter tower and the biological trickling filter tower are usually made of natural materials, and the following problems can occur in the actual operation process, such as filler degradation requiring replacement, lowered acidification performance of a reactor, blockage of a gap by a biological membrane caused by too high gas load, drying of a filler layer caused by low humidity and the like. Particularly in the aspect of treating halogen-containing VOCs and sulfides, a large amount of acidic degradation products are generated in a short time, so that the pH value in the tower and in leachate is low, and the growth and metabolism of microorganisms and the removal efficiency of VOCs or sulfides are influenced. The use of continuous sprays and frequent changes of spray solutions has been suggested by the scholars to remove acidic products and maintain the pH environment within the column, but this increases the water content within the column, which is detrimental to mass transfer and more economical.
Disclosure of Invention
The invention aims to provide an acid-resistant microbial capsule embedding liquid, a microbial capsule, a preparation method and application thereof, aiming at the technical defects in the prior art, wherein the microbial capsule embedding liquid can keep stable shape and size under the condition of low pH for a long time, and has a protection effect on microorganisms used for degrading waste gas in a filler, so that high removal efficiency on acid-producing waste gas can be kept under long-term operation.
The technical scheme adopted for realizing the purpose of the invention is as follows:
an acid-resistant microbial capsule embedding liquid is prepared according to the following steps:
step 1, adding polyvinyl alcohol and sodium alginate into ultrapure water, and heating until the polyvinyl alcohol and the sodium alginate are completely dissolved to obtain a mixed solution, wherein the mass of the polyvinyl alcohol is 3-5% of the mass of the ultrapure water, and the mass of the sodium alginate is 5-7% of the mass of the ultrapure water;
and 3, adding the cooled mixed solution into the microbial liquid with the same volume, and uniformly mixing to obtain an embedding solution.
In the above technical scheme, the pH buffer is sodium bicarbonate or sodium phosphate.
In the technical scheme, the microbial liquid is activated sludge, and MLSS is 10000-30000 mg/L.
In another aspect of the present invention, a method for preparing an acid-resistant microbial capsule burying liquid comprises the following steps:
step 1, adding polyvinyl alcohol and sodium alginate into ultrapure water, and heating until the polyvinyl alcohol and the sodium alginate are completely dissolved to obtain a mixed solution, wherein the mass of the polyvinyl alcohol is 3-5% of the mass of the ultrapure water, and the mass of the sodium alginate is 5-7% of the mass of the ultrapure water;
and 3, adding the cooled mixed solution into the microbial liquid with the same volume, and uniformly mixing to obtain an embedding solution.
In another aspect of the present invention, the microbial capsule with acid resistance is further included, the diameter of the microbial capsule is 3.0-3.3mm (the capsule with the particle size range can not only maintain good mass transfer performance, but also ensure good mechanical performance), and the bacterial liquid accounts for 40% by mass, and the microbial capsule is prepared according to the following steps: dripping the microbial capsule embedding liquid into a saturated boric acid-calcium chloride solution, placing the obtained small balls in a saturated boric acid-calcium chloride solution for crosslinking reaction for 20-30h at the temperature of 3-6 ℃, and taking out and cleaning the obtained microbial capsules.
In the technical scheme, the swelling degree of the acid-resistant microbial capsule is 5-10% after the acid-resistant microbial capsule is soaked for 7-30 days under the condition that the pH value is 3,
in the technical scheme, the microbial capsule embedding liquid is uniformly dropped into a saturated boric acid-calcium chloride solution, preferably 35cm, from a height of 30-40cm through a micro sample injection pump, and the obtained pellet is placed in the saturated boric acid-calcium chloride solution for crosslinking reaction for 24 hours, preferably 4 ℃ at the temperature of 3-5 ℃.
In another aspect of the invention, the application of the acid-resistant microbial capsules as a filler in a biological filter tower for treating acidic waste gas is also included.
In the technical scheme, the height of the biological filter tower is 50cm, the inner diameter is 8cm, the wall thickness is 0.5cm, the stacking height of the used microbial capsule embedding liquid is 22cm, and the packing volume of the used microbial capsule is 1.110m3Lower part of the filler is adoptedThe method comprises the steps of using ceramsite with the thickness of 5cm as a bearing layer, treating chlorobenzene for 1-100 days after a start-up period under the condition that the particle size of the ceramsite is about 3-5mm, wherein the chlorobenzene removal efficiency of the microbial capsules is stabilized to be more than 70%, and after chlorobenzene is treated for 100 days, the diameters of the microbial capsules are 90-98% of those of chlorobenzene on the first day.
In the technical scheme, the height of the biological filter tower is 50cm, the inner diameter is 8cm, the wall thickness is 0.5cm, the stacking height of the used microbial capsule embedding liquid is 22cm, and the packing volume of the used microbial capsule is 1.110m3The lower part of the filler adopts ceramsite with the thickness of 5cm as a bearing layer, the hydrogen sulfide is removed for 1 to 100 days after the start-up period under the condition that the particle size of the ceramsite is about 3 to 5mm, the removal efficiency is 80 to 85 percent, and the diameter of the microbial capsule is 90 to 97 percent of that of the first day after the hydrogen sulfide is treated for 100 days.
In the technical scheme, the height of the biological filter tower is 50cm, the inner diameter is 8cm, the wall thickness is 0.5cm, the stacking height of the used microbial capsule embedding liquid is 22cm, and the packing volume of the used microbial capsule is 1.110m3The lower part of the filler adopts ceramsite with the thickness of 5cm as a bearing layer, the grain diameter of the ceramsite is about 3-5mm, the ethanethiol is removed for 1-100 days after the start-up period, the removal efficiency is 80% -85%, and the diameter of the microbial capsule is 90-98% of that of the microbial capsule in the first day after the hydrogen sulfide is treated for 100 days.
Compared with the prior art, the invention has the beneficial effects that:
1. the acid-resistant microbial capsule can bear lower pH, the swelling degree of the acid-resistant microbial capsule is 5-10% after the acid-resistant microbial capsule is soaked for 7 days under the condition that the pH is 3, the swelling degree of the acid-resistant microbial capsule is basically the same as that of the acid-resistant microbial capsule soaked for 7 days after the acid-resistant microbial capsule is soaked for 30 days, and the acid-resistant microbial capsule is not damaged.
2. The acid-resistant microbial capsule can reduce the influence on microbial activity caused by pH change or toxicity of the external environment, can play a role in buffering and protecting under the condition that the system environment suddenly becomes severe due to limited diffusion of the carrier, and has better bearing capacity on low pH value by adding the sodium bicarbonate serving as the buffering agent into the capsule.
3. The acid-resistant microbial capsule disclosed by the invention is high in microbial density, and the mass ratio of the bacterial liquid is up to 40%. The occupied volume of the same biomass is small, the higher the concentration of the microorganisms in the reactor is, the correspondingly improved processing load is, the shorter the required reaction time is, the volume and the occupied area of the processing device are reduced, and the miniaturization of waste gas processing equipment is facilitated. When the filler is applied to a biological filter tower, the filler is easy to operate and maintain, the spraying time and the replacement period are both shortened, and the investment cost and the operating cost are reduced.
4. The preparation method of the acid-resistant microbial capsule uses a micro-sampling pump to push embedding liquid, is simple and convenient to operate, and the prepared microbial capsule has controllable and uniform size, and is basically stable within 3-3.3mm, and the capsule accounts for more than 98% of the diameter range.
5. The acid-resistant microbial capsule has the advantages of good mechanical strength, uniform pore canal size and stable material due to the addition of the activated carbon, and can adapt to long-term operation conditions.
Drawings
FIG. 1 is a diagram of immobilized microorganism packing material when it is not put into a biological filtration tower;
FIG. 2 is a physical diagram of the immobilized microorganism filler after 100 days of operation in the biofiltration tower.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
The present invention will now be further described by way of example of the removal of chlorobenzene from the acid-resistant microbial capsule filler in a biofiltration column, and this embodiment is intended to further illustrate the preparation and use of the acid-resistant microbial capsule filler, but the embodiments of the present invention are not limited thereto.
(1) Adding polyvinyl alcohol (4%) and sodium alginate (6%) into 1000ml of ultrapure water, heating the ultrapure water and the sodium alginate in a heat collection type constant temperature heating magnetic stirrer by water bath until the polyvinyl alcohol and the sodium alginate are completely dissolved;
(2) adding 1% of activated carbon powder and 2% of sodium bicarbonate into the mixed solution heated in the water bath in the step (2), uniformly mixing, and cooling to 30 ℃;
(3) adding the cooled mixed solution into 1000ml of activated sludge (MLSS is 20000mg/L) with the same volume, and uniformly mixing to obtain embedding solution;
(4) filling the embedding liquid obtained in the step (3) into a 50ml needle tube, then placing the needle tube on a micro sample injection pump (ALC-IP900 type), adjusting the sample injection speed of the micro sample injection pump to be 25ml/min, slowly and uniformly dropping the embedding liquid from a height of 30cm to a saturated boric acid (3.8%) -calcium chloride solution (2%) placed on a constant-temperature magnetic stirrer to form a microbial capsule with the size of about 3mm, wherein the method is an automatic process, can be used for batch production of the microbial capsule, and the size of the produced capsule is very uniform, the whole process is stable and rapid, and the produced microbial capsule is still placed in the saturated boric acid-calcium chloride solution and is subjected to crosslinking reaction in a refrigerator with the temperature of 4 ℃ for 24 hours;
(5) taking out the completely crosslinked microbial capsules obtained in the step (4), and repeatedly washing with ultrapure water;
(6) and (4) placing the microbial capsules obtained in the step (5) in a biological filter tower made of organic glass materials as a filler. The biological filtration tower has a height of 50cm, an inner diameter of 8cm, a wall thickness of 0.5cm, a stacking height of the immobilized bead filler of 22cm, and a volume of the immobilized bead filler of about 1.110m3The lower part of the filler adopts ceramsite with the thickness of 5cm as a bearing layer, and the particle size of the ceramsite is about 3-5 mm. The concentration of the introduced chlorobenzene is 200-600mg/m3The blowing air flow rate is 0.075m3The chlorobenzene retention time is about 53s, the spray liquid is inorganic salt nutrient solution, and the spray is sprayed for 10min every 24 h;
(7) after a start-up period of about ten days, the chlorobenzene removal efficiency of the biological filtration tower is stabilized to be more than 70%, and the start-up speed and the removal efficiency are both superior to those of the biological filtration tower with the traditional filler. After about 100 days, the removal efficiency is still maintained above 70%, and the acid-resistant microbial capsule is not broken but has a slightly reduced form size, but does not affect the removal efficiency of chlorobenzene.
When the content of polyvinyl alcohol in the capsule is high, the needle head is easy to block due to high viscosity, and the balling is difficult. After 4% of polyvinyl alcohol is added, 6% of sodium alginate is added, the microbial capsule has a good porous structure, a large number of pore channels are embedded in the microbial capsule, and the pore channels are large, so that mass transfer is facilitated.
The addition of the activated carbon in the embedding agent can increase a plurality of micropores in the immobilized particles, increase the contact of a plurality of substrates and products, enhance the mass transfer between microorganisms and the substrates, and also facilitate the discharge of metabolites produced by the microorganisms from the interior of the particles. Therefore, the optimum mass fraction of activated carbon for the improved immobilization process was determined to be 1%.
When the concentration of the bacterial liquid is increased, the ratio of the mud to the water is increased, the microbes for metabolism in the grids of the microbial capsules are increased, meanwhile, the contact between the microbes and the waste gas is increased, so that the degradation efficiency is improved, when the concentration of the bacterial liquid is increased to a certain concentration, the bacterial liquid in the holes of the grids is saturated, and the degradation efficiency is not increased any more. If the concentration of the bacterial liquid is too high, the mechanical strength of the microbial capsule filler is reduced, so that the optimal bacterial liquid concentration is determined to be 20 mg/L.
Adding a certain amount of CaCl into saturated boric acid2Not only weakens the hydrogen bond action in the gel molecular chain and reduces the viscosity, but also makes the preparation process easier and has better mass transfer property and mechanical strength, and the CaCl is added definitely2The optimum concentration of (2%).
Example 2
The microbial capsules obtained in example 1 were placed in a biofiltration tower made of plexiglass material as a filler. The biological filtration tower has a height of 50cm, an inner diameter of 8cm, a wall thickness of 0.5cm, a stacking height of the immobilized bead filler of 22cm, and a volume of the immobilized bead filler of about 1.110m3The lower part of the filler adopts ceramsite with the thickness of 5cm as a bearing layer, and the particle size of the ceramsite is about 3-5 mm. The concentration of the introduced hydrogen sulfide is 100-3The blowing air flow rate was 0.1m3The residence time of hydrogen sulfide is about 39s, the spraying liquid is inorganic salt nutrient solution, and the spraying is carried out for 10min every 24 h;
after a start-up period of about ten days, the efficiency of removing hydrogen sulfide by the biological filter tower is stabilized to be more than 85%, and the start-up speed and the removal efficiency are both superior to those of the traditional filler biological filter tower. After about 100 days, the removal efficiency is still maintained above 80%, and the acid-resistant microbial capsule is not broken, but is only slightly reduced in size, but does not affect the removal efficiency of hydrogen sulfide.
Example 3
The microbial capsules obtained in example 1 were placed in a biofiltration tower made of plexiglass material as a filler. The biological filtration tower has a height of 50cm, an inner diameter of 8cm, a wall thickness of 0.5cm, a stacking height of the immobilized bead filler of 22cm, and a volume of the immobilized bead filler of about 1.110m3The lower part of the filler adopts ceramsite with the thickness of 5cm as a bearing layer, and the particle size of the ceramsite is about 3-5 mm. The concentration of the introduced ethanethiol is 100-500mg/m3The blowing air flow rate is 0.075m3The retention time of the ethanethiol is about 53s, the spraying liquid is inorganic salt nutrient solution, and the spraying is carried out for 10min every 24 h;
after a start-up period of about ten days, the efficiency of the biofiltration tower for removing the ethanethiol is stabilized to be more than 85 percent, and the start-up speed and the removal efficiency are both superior to those of the biofiltration tower with the traditional filler. After about 100 days, the removal efficiency is still maintained above 80%, and the acid-resistant microbial capsules are not broken, only slightly reduce the size of the capsules, but do not affect the removal efficiency of the ethanethiol.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The acid-resistant microbial capsule embedding liquid is characterized by being prepared according to the following steps:
step 1, adding polyvinyl alcohol and sodium alginate into ultrapure water, and heating until the polyvinyl alcohol and the sodium alginate are completely dissolved to obtain a mixed solution, wherein the mass of the polyvinyl alcohol is 3-5% of the mass of the ultrapure water, and the mass of the sodium alginate is 5-7% of the mass of the ultrapure water;
step 2, adding activated carbon powder and a pH buffering agent into the mixed solution and cooling to 30-40 ℃, wherein the mass of the activated carbon powder is 0.9-1.3% of the mass of the mixed solution, and the mass of the pH buffering agent is 1.5-2.5% of the mass of the mixed solution;
and 3, adding the cooled mixed solution into the microbial liquid with the same volume, and uniformly mixing to obtain an embedding solution.
2. The acid-resistant microbial capsule burying liquid as claimed in claim 1, wherein said pH buffer is sodium bicarbonate or sodium phosphate, said microbial liquid is activated sludge, MLSS is 10000-30000 mg/L.
3. The preparation method of the acid-resistant microbial capsule embedding liquid is characterized by comprising the following steps of:
step 1, adding polyvinyl alcohol and sodium alginate into ultrapure water, and heating until the polyvinyl alcohol and the sodium alginate are completely dissolved to obtain a mixed solution, wherein the mass of the polyvinyl alcohol is 3-5% of the mass of the ultrapure water, and the mass of the sodium alginate is 5-7% of the mass of the ultrapure water;
step 2, adding activated carbon powder and a pH buffering agent into the mixed solution and cooling to 30-40 ℃, wherein the mass of the activated carbon powder is 0.9-1.3% of the mass of the mixed solution, and the mass of the pH buffering agent is 1.5-2.5% of the mass of the mixed solution;
and 3, adding the cooled mixed solution into the microbial liquid with the same volume, and uniformly mixing to obtain an embedding solution.
4. The acid-resistant microbial capsule is characterized in that the diameter of the microbial capsule is 3.0-3.3mm, the bacterial liquid accounts for 40% by mass, and the acid-resistant microbial capsule is prepared according to the following steps: dripping the microbial capsule embedding liquid into a saturated boric acid-calcium chloride solution, placing the obtained small balls in a saturated boric acid-calcium chloride solution for crosslinking reaction for 20-30h at the temperature of 3-6 ℃, and taking out and cleaning the obtained microbial capsules.
5. The acid-resistant microbial capsule of claim 4, having a swelling capacity of 5-10% after 7-30 days of immersion at a pH of 3.
6. The acid-resistant microbial capsule according to claim 4, wherein the microbial capsule embedding liquid is uniformly dropped into a saturated boric acid-calcium chloride solution from a height of 30-40cm, preferably 35cm, through a micro-sampling pump, and the obtained pellet is placed in a saturated boric acid-calcium chloride solution for crosslinking reaction for 24h, preferably 4 ℃ at an environment of 3-5 ℃.
7. The use of acid-resistant microbial capsules according to claim 4 as a packing material in a biofiltration tower for treating acidic exhaust gases.
8. The use according to claim 7, wherein the height of the biofiltration tower is 50cm, the inner diameter is 8cm, the wall thickness is 0.5cm, the packing height of the used microbial capsule embedding liquid is 22cm, and the packing volume of the used microbial capsule is 1.110m3The lower part of the filler adopts ceramsite with the thickness of 5cm as a bearing layer, the ceramsite is treated for 1-100 days through a start-up period under the condition that the particle size is about 3-5mm, the chlorobenzene removal efficiency of the microbial capsule is stabilized to be more than 70%, and the diameter of the microbial capsule is 90-98% of that of the microbial capsule in the first day after the chlorobenzene is treated for 100 days.
9. The use according to claim 8, wherein the height of the biofiltration tower is 50cm, the inner diameter is 8cm, the wall thickness is 0.5cm, the packing height of the used microbial capsule embedding liquid is 22cm, and the packing volume of the used microbial capsule is 1.110m3The lower part of the filler adopts ceramsite with the thickness of 5cm as a bearing layer, the hydrogen sulfide is removed for 1 to 100 days after the start-up period under the condition that the particle size of the ceramsite is about 3 to 5mm, the removal efficiency is 80 to 85 percent, and the diameter of the microbial capsule is 90 to 97 percent of that of the first day after the hydrogen sulfide is treated for 100 days.
10. The method of claim 8The application is characterized in that the height of the biological filter tower is 50cm, the inner diameter is 8cm, the wall thickness is 0.5cm, the stacking height of the used microbial capsule embedding liquid is 22cm, and the packing volume of the used microbial capsule is 1.110m3The lower part of the filler adopts ceramsite with the thickness of 5cm as a bearing layer, the grain diameter of the ceramsite is about 3-5mm, the ethanethiol is removed for 1-100 days after the start-up period, the removal efficiency is 80% -85%, and the diameter of the microbial capsule is 90-98% of that of the microbial capsule in the first day after the hydrogen sulfide is treated for 100 days.
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