CN111439824A - Water treatment biofilm carrier with bacteria promoting performance and preparation method and application thereof - Google Patents

Water treatment biofilm carrier with bacteria promoting performance and preparation method and application thereof Download PDF

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CN111439824A
CN111439824A CN202010153218.6A CN202010153218A CN111439824A CN 111439824 A CN111439824 A CN 111439824A CN 202010153218 A CN202010153218 A CN 202010153218A CN 111439824 A CN111439824 A CN 111439824A
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solution
water treatment
polyvinyl alcohol
bacteria
filter cotton
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CN111439824B (en
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赵丽
项海
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Zhejiang Zhengjie Environmental Science And Technology Co ltd
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Zhejiang Zhengjie Environmental Science And Technology Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/105—Phosphorus compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/30—Nature of the water, waste water, sewage or sludge to be treated from the textile industry
    • 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
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

Abstract

The invention relates to a water treatment biomembrane carrier with a bacteria promoting performance, a preparation method and an application thereof, wherein the preparation method comprises the following steps: preparing a polyvinyl alcohol solution and a saturated boric acid solution; slowly adding the expanded graphite and the acid modified diatomite into a polyvinyl alcohol solution, stirring until the mixture is uniformly mixed, completely immersing the porous filter cotton into the solution until the solution is saturated by adsorption, taking out the filter cotton, slightly airing the filter cotton, and putting the filter cotton into a saturated boric acid solution for curing after no obvious water drops exist, thereby obtaining the modified water treatment biomembrane carrier. The biological membrane carrier not only can provide an attaching space for microorganisms, but also has a good promoting effect on the growth of the microorganisms, and can be used for the treatment of industrial wastewater and municipal sewage, the ecological restoration of eutrophic water bodies (such as lakes and rivers) and the like.

Description

Water treatment biofilm carrier with bacteria promoting performance and preparation method and application thereof
Technical Field
The invention relates to a biofilm carrier, in particular to a water treatment biofilm carrier with a bacteria promoting performance, and a preparation method and application thereof.
Background
In recent years, secondary biological treatment processes for industrial wastewater and municipal sewage are increasingly adopting a biofilm method, and the basic principle is that microorganisms are fixed on the surface of a carrier, and wastewater flowing continuously is taken as a nutrient source of the microorganisms attached to the carrier to grow and breed, so that pollutants in the wastewater are reduced, and the degradation effect is achieved.
In the biofilm process, the carrier plays a very important role as a place for the attachment and growth of microorganisms. The characteristics of a good carrier should be: the carrier has the advantages of large specific surface area, good biological affinity and proper particle size so as to increase the attachment amount of microorganisms, the mechanical strength of the carrier is enough to ensure the continuous and stable operation of the process, the surface of the carrier is preferably provided with certain chemical functional groups with special activity so as to achieve the effect of coupling biomolecules directly or after activation, the price of the carrier is relatively cheap and the carrier is convenient to use in the process flow, and the like. In fact, there is very little support material that meets all of the above criteria. The selection of a suitable carrier material is generally always dependent on the operating properties.
The water treatment biofilm carrier commonly used at present mainly only provides an attachment space for microorganisms, and related patents or documents of the biofilm carrier with the bacteria promoting performance do not appear.
Disclosure of Invention
In order to overcome the defects and shortcomings of the prior art, the invention provides the water treatment biomembrane carrier with the bacteria promoting performance and the preparation method and the application thereof.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a water treatment biofilm carrier with bacteria promoting performance comprises the following raw materials: the modified polyvinyl alcohol solution comprises a polyvinyl alcohol solution, expanded graphite, acid modified diatomite and a saturated boric acid solution, wherein the mass ratio of the polyvinyl alcohol solution to the expanded graphite to the acid modified diatomite to the saturated boric acid solution is 4: 0.3-1: 0.1-1: 0.2 to 0.6.
Preferably, the acid-modified diatomite is prepared by the following method: weighing diatomite in a beaker, adding water, adding concentrated hydrochloric acid, and stirring for reaction; and then carrying out suction filtration, washing and drying to obtain the acid modified diatomite.
Preferably, the mass ratio of the polyvinyl alcohol solution, the expanded graphite, the acid-modified diatomite and the saturated boric acid solution is 4: 0.7: 0.3: 0.4.
the invention also provides a preparation method of the water treatment biofilm carrier with the bacteria promoting performance, which comprises the following steps:
(1) preparing a polyvinyl alcohol solution and a saturated boric acid solution;
(2) slowly adding the expanded graphite and the acid modified diatomite into a polyvinyl alcohol solution, stirring until the mixture is uniformly mixed, completely immersing the porous filter cotton into the solution until the solution is saturated by adsorption, taking out the filter cotton, slightly airing the filter cotton, and putting the filter cotton into a saturated boric acid solution for curing after no obvious water drops exist, thereby obtaining the modified water treatment biomembrane carrier.
Preferably, the mass fraction of the polyvinyl alcohol solution is 5-15%.
Preferably, the acid-modified diatomite is prepared by the following method: weighing diatomite in a reactor, adding water, adding concentrated hydrochloric acid, and stirring for reaction; and then carrying out suction filtration, washing and drying to obtain the acid modified diatomite.
Preferably, the preparation method of the water treatment biofilm carrier with the bacteria-promoting performance comprises the following steps:
(1) preparing a polyvinyl alcohol solution (which needs to be heated to 70-75 ℃ for dissolution) with the mass fraction of 8% and a saturated boric acid solution;
(2) preparing acid modified diatomite by weighing 10g diatomite in 200m L beaker, adding 100m L water, adding 20m L concentrated hydrochloric acid, reacting for 4h under electromagnetic stirring to remove acid soluble substances, filtering, and washing until no Cl exists-Drying the ions in an oven at 100 ℃ for later use;
(3) slowly adding the expanded graphite and the acid modified diatomite into a polyvinyl alcohol solution, stirring for 30-60 min until the mixture is uniformly mixed, completely immersing 3cm by 3cm porous filter cotton (water treatment biomembrane carrier) into the solution until the solution is saturated by adsorption, fishing out the filter cotton, airing until no obvious water drops exist, and then putting the filter cotton into a saturated boric acid solution for curing for 25-35 min to obtain the modified water treatment biomembrane carrier.
Preferably, the mass ratio of the polyvinyl alcohol solution, the expanded graphite, the acid-modified diatomite and the saturated boric acid solution is 4: 0.7: 0.3: 0.4.
the invention also provides application of the water treatment biomembrane carrier with the bacteria promoting performance in printing and dyeing industrial wastewater, municipal sewage and river water. The result shows that the water treatment biomembrane carrier has good bacteria promoting effect.
Compared with the prior art, the invention has the beneficial effects that:
1. the preparation method of the water treatment biomembrane carrier is simple and feasible, is easy to operate and is suitable for industrial production; the final material is non-toxic and harmless, and does not cause new pollution to water;
2. the porous materials such as the expanded graphite and the acid modified diatomite have the advantages of large specific surface area, strong adsorption performance and the like, and especially the expanded graphite has the advantages of low cost, less energy consumption, stable physicochemical properties, good effect and the like due to the characteristics of looseness, porosity, inorganic carbon enrichment, good water-retaining property and the like;
3. inorganic materials (expanded graphite and acid modified diatomite) are uniformly dispersed and fixed inside and outside the water treatment biomembrane carrier, so that a large number of attachment sites can be provided; the microorganisms are firstly attached to the surface of the carrier, the solidified material can be used for quickly reproducing nutrient substances, the attachment sites are gradually exposed to provide more habitats for the microorganisms, and the biofilm carrier can reach ecological balance in a short time.
Detailed Description
The technical solution of the present invention is further specifically described below by specific examples, which are provided for illustration of the present invention and are not intended to limit the present invention. 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 application.
Example 1
A water treatment biofilm carrier with bacteria promoting performance is prepared by the following steps:
(1) preparing a polyvinyl alcohol solution (which needs to be heated to 70-75 ℃ for dissolution) with the mass fraction of 8% and a saturated boric acid solution;
(2) preparing acid modified diatomite by weighing 10g diatomite in 200m L beaker, adding 100m L water, adding 20m L concentrated hydrochloric acid, reacting for 4h under electromagnetic stirring to remove acid soluble substances, filtering, and washing until no Cl exists-Drying the ions in an oven at 100 ℃ for later use;
(3) slowly adding the expanded graphite and the acid modified diatomite into a polyvinyl alcohol solution, stirring for 45min until the mixture is uniformly mixed, completely immersing 3cm by 3cm porous filter cotton (water treatment biomembrane carrier) into the solution until the solution is saturated by adsorption, fishing out the filter cotton, airing until no obvious water drops exist, and then putting the filter cotton into a saturated boric acid solution to be solidified for 30min to obtain the modified water treatment biomembrane carrier.
Wherein the mass ratio of the polyvinyl alcohol solution, the expanded graphite, the acid modified diatomite and the saturated boric acid solution is 4: 0.7: 0.3: 0.4.
total phosphorus removal experiments:
the phosphorus-removing bacteria screened by a laboratory in the embodiment are obtained by placing a bacteria liquid cultured for 24 hours into a centrifuge tube, centrifuging at 3000rpm for 5min, taking out and removing a supernatant, then adding sterile water into the centrifuge tube, mixing uniformly, placing into a centrifuge for centrifuging, and repeating the step for 2-3 times until the color of a washed culture medium is removed to prevent the interference of the determination of absorbance; finally, the washed cells were made into OD600About 2 bacterial suspensions. Selecting a plurality of unmodified water treatment biomembrane carriers with basically the same volume and mass, recording the weight of the carriers, and respectively carrying out the following operations:
① soaking in pure water for 2h, and taking out to obtain blank carrier.
② soaking in the bacterial suspension for 2h, and taking out to obtain blank carrier containing bacteria.
③ modifying the water treatment biomembrane carrier according to the optimized formula (the modified water treatment biomembrane carrier with the bacteria promoting performance), then soaking in the bacteria suspension for 2h, and taking out the carrier, which is marked as the modified bacteria-containing carrier.
In this example, a sample of wastewater was obtained from a certain dyeing mill, which was Hainin, and the pH of the wastewater was 6.30, and the total phosphorus content was 17.40 mg/L. 2 pieces of blank carriers, carriers containing bacteria, and modified carriers containing bacteria were placed in conical flasks containing L m of wastewater, respectively, and reacted in a constant temperature oscillator (30 ℃, 160r/min), and samples were taken after 24 hours, 48 hours, and 72 hours, respectively, to measure the total phosphorus content of the wastewater, and the results are shown in Table 1, and each experiment in this example was performed by setting 2 sets of parallel comparisons.
TABLE 1
Figure BDA0002403153120000041
The result shows that the modified water treatment biomembrane carrier has good bacteria promoting effect. The biological membrane carrier not only can provide an attaching space for microorganisms, but also has a good promoting effect on the growth of the microorganisms, and can be used for the treatment of industrial wastewater and municipal sewage, the ecological restoration of eutrophic water bodies (such as lakes and rivers) and the like.
Example 2
Referring to example 1, in the present example, a wastewater sample is taken from a municipal sewage treatment plant in Hangzhou, the pH value of the wastewater is 7.03, and the total phosphorus content is 6.36 mg/L. 2 blank carriers, bacteria-containing carriers and modified bacteria-containing carriers are respectively put into a conical flask filled with 300m L wastewater, placed in a constant temperature oscillator (30 ℃, 160r/min) for reaction, and the total phosphorus content of the wastewater is measured by sampling after 24 hours, 48 hours and 72 hours respectively, and the results are shown in Table 2, wherein 2 groups of parallel comparison are set in each experiment in the example.
TABLE 2
Figure BDA0002403153120000051
Example 3
Referring to example 1, in this example, a wastewater sample is taken from a gulf of Hangzhou, the pH value of the wastewater is 8.51, and the total phosphorus content is 0.85 mg/L. 2 blank carriers, bacteria-containing carriers and modified bacteria-containing carriers are respectively put into a conical flask filled with 300m L wastewater, placed in a constant temperature oscillator (30 ℃, 160r/min) for reaction, and the total phosphorus content of the wastewater is measured by sampling after 24 hours, 48 hours and 72 hours, respectively, and the results are shown in Table 3, wherein each experiment in this example is provided with 2 sets of parallel comparison.
TABLE 3
Figure BDA0002403153120000052
Example 4
A water treatment biofilm carrier with bacteria promoting performance is prepared by the following steps:
(1) preparing a polyvinyl alcohol solution (which needs to be heated to 70-75 ℃ for dissolution) with the mass fraction of 8% and a saturated boric acid solution;
(2) preparing acid modified diatomite by weighing 10g diatomite in 200m L beaker, adding 100m L water, adding 20m L concentrated hydrochloric acid, reacting for 4h under electromagnetic stirring to remove acid soluble substances, filtering, and washing until no Cl exists-Drying the ions in an oven at 100 ℃ for later use;
(3) slowly adding the expanded graphite and the acid modified diatomite into a polyvinyl alcohol solution, stirring for 30min until the mixture is uniformly mixed, completely immersing 3cm by 3cm porous filter cotton (water treatment biomembrane carrier) into the solution until the solution is saturated by adsorption, fishing out the filter cotton, airing until no obvious water drops exist, and then putting the filter cotton into a saturated boric acid solution to be solidified for 30min to obtain the modified water treatment biomembrane carrier.
Wherein the mass ratio of the polyvinyl alcohol solution, the expanded graphite, the acid modified diatomite and the saturated boric acid solution is 4: 0.3: 0.3: 0.4.
in this example, a sample of wastewater was taken from a certain dyeing mill, Hainin, and the pH of the wastewater was 6.30, and the total phosphorus content was 17.40 mg/L. 2 pieces of blank carriers, carriers containing bacteria, and modified carriers containing bacteria were placed in conical flasks containing L m of wastewater, respectively, and reacted in a constant temperature oscillator (30 ℃, 160r/min), and samples were taken after 24 hours, 48 hours, and 72 hours, respectively, to measure the total phosphorus content of the wastewater, and the results are shown in Table 4, in which each experiment was conducted in parallel with 2 groups.
TABLE 4
Figure BDA0002403153120000061
Example 5
A water treatment biofilm carrier with bacteria promoting performance is prepared by the following steps:
(1) preparing a polyvinyl alcohol solution (which needs to be heated to 70-75 ℃ for dissolution) with the mass fraction of 8% and a saturated boric acid solution;
(2) preparing acid modified diatomite by weighing 10g diatomite in 200m L beaker, adding 100m L water, adding 20m L concentrated hydrochloric acid, reacting for 4h under electromagnetic stirring to remove acid soluble substances, filtering, and washing until no Cl exists-Drying the ions in an oven at 100 ℃ for later use;
(3) slowly adding the expanded graphite and the acid modified diatomite into a polyvinyl alcohol solution, stirring for 30min until the mixture is uniformly mixed, completely immersing 3cm by 3cm porous filter cotton (water treatment biomembrane carrier) into the solution until the solution is saturated by adsorption, fishing out the filter cotton, airing until no obvious water drops exist, and then putting the filter cotton into a saturated boric acid solution to be solidified for 30min to obtain the modified water treatment biomembrane carrier.
Wherein the mass ratio of the polyvinyl alcohol solution, the expanded graphite, the acid modified diatomite and the saturated boric acid solution is 4: 0.5: 0.3: 0.4.
in this example, a sample of wastewater was taken from a certain dyeing mill, Hainin, and the pH of the wastewater was 6.30, and the total phosphorus content was 17.40 mg/L. 2 pieces of blank carriers, carriers containing bacteria, and modified carriers containing bacteria were placed in conical flasks containing L m of wastewater, respectively, and reacted in a constant temperature oscillator (30 ℃, 160r/min), and samples were taken after 24 hours, 48 hours, and 72 hours, respectively, to measure the total phosphorus content of the wastewater, and the results are shown in Table 5, in which each experiment was conducted in parallel with 2 groups.
TABLE 5
Figure BDA0002403153120000071
Example 6
A water treatment biofilm carrier with bacteria promoting performance is prepared by the following steps:
(1) preparing a polyvinyl alcohol solution (which needs to be heated to 70-75 ℃ for dissolution) with the mass fraction of 8% and a saturated boric acid solution;
(2) preparing acid modified diatomite by weighing 10g diatomite in 200m L beaker, adding 100m L water, adding 20m L concentrated hydrochloric acid, reacting for 4h under electromagnetic stirring to remove acid soluble substances, filtering, and washing until no Cl exists-Drying the ions in an oven at 100 ℃ for later use;
(3) slowly adding the expanded graphite and the acid modified diatomite into a polyvinyl alcohol solution, stirring for 30min until the mixture is uniformly mixed, completely immersing 3cm by 3cm porous filter cotton (water treatment biomembrane carrier) into the solution until the solution is saturated by adsorption, fishing out the filter cotton, airing until no obvious water drops exist, and then putting the filter cotton into a saturated boric acid solution to be solidified for 30min to obtain the modified water treatment biomembrane carrier.
Wherein the mass ratio of the polyvinyl alcohol solution, the expanded graphite, the acid modified diatomite and the saturated boric acid solution is 4: 1.0: 0.3: 0.4.
in this example, a sample of wastewater was taken from a certain dyeing plant, Hainin, and the pH of the wastewater was 6.30, and the total phosphorus content was 17.40 mg/L. 2 pieces of blank carriers, carriers containing bacteria, and modified carriers containing bacteria were placed in conical flasks containing L m of wastewater, respectively, and reacted in a constant temperature oscillator (30 ℃, 160r/min), and samples were taken after 24 hours, 48 hours, and 72 hours, respectively, to measure the total phosphorus content of the wastewater, and the results are shown in Table 6, and each experiment in this example was performed by setting 2 sets of parallel comparisons.
TABLE 6
Figure BDA0002403153120000081
Example 7
A water treatment biofilm carrier with bacteria promoting performance is prepared by the following steps:
(1) preparing a polyvinyl alcohol solution (which needs to be heated to 70-75 ℃ for dissolution) with the mass fraction of 8% and a saturated boric acid solution;
(2) preparation of acid-modified diatomaceous earth 10g of diatomaceous earth were weighed into a 200m L beaker, 100m L water was added,adding 20m L concentrated hydrochloric acid, reacting under electromagnetic stirring for 4 hr to remove acid soluble substances, filtering, and washing until no Cl is formed-Drying the ions in an oven at 100 ℃ for later use;
(3) slowly adding the expanded graphite and the acid modified diatomite into a polyvinyl alcohol solution, stirring for 30min until the mixture is uniformly mixed, completely immersing 3cm by 3cm porous filter cotton (water treatment biomembrane carrier) into the solution until the solution is saturated by adsorption, fishing out the filter cotton, airing until no obvious water drops exist, and then putting the filter cotton into a saturated boric acid solution to be solidified for 30min to obtain the modified water treatment biomembrane carrier.
Wherein the mass ratio of the polyvinyl alcohol solution, the expanded graphite, the acid modified diatomite and the saturated boric acid solution is 4: 0.7: 0.1: 0.4.
in this example, a sample of wastewater was taken from a certain dyeing mill, Hainin, and the pH of the wastewater was 6.30, and the total phosphorus content was 17.40 mg/L. 2 pieces of blank carriers, carriers containing bacteria, and modified carriers containing bacteria were placed in conical flasks containing L m of wastewater, respectively, and reacted in a constant temperature oscillator (30 ℃, 160r/min), and samples were taken after 24 hours, 48 hours, and 72 hours, respectively, to measure the total phosphorus content of the wastewater, and the results are shown in Table 7, in which each experiment was conducted in parallel with 2 groups.
TABLE 7
Figure BDA0002403153120000082
Figure BDA0002403153120000091
Example 8
A water treatment biofilm carrier with bacteria promoting performance is prepared by the following steps:
(1) preparing a polyvinyl alcohol solution (which needs to be heated to 70-75 ℃ for dissolution) with the mass fraction of 8% and a saturated boric acid solution;
(2) the acid-modified diatomaceous earth is prepared by weighing 10g diatomaceous earth in 200m L beaker, adding 100m L water, adding 20m L concentrated hydrochloric acid, reacting thoroughly for 4h under electromagnetic stirring to remove acid-soluble substances, and addingPerforming suction filtration and washing until no Cl is generated-Drying the ions in an oven at 100 ℃ for later use;
(3) slowly adding the expanded graphite and the acid modified diatomite into a polyvinyl alcohol solution, stirring for 30min until the mixture is uniformly mixed, completely immersing 3cm by 3cm porous filter cotton (water treatment biomembrane carrier) into the solution until the solution is saturated by adsorption, fishing out the filter cotton, airing until no obvious water drops exist, and then putting the filter cotton into a saturated boric acid solution to be solidified for 30min to obtain the modified water treatment biomembrane carrier.
Wherein the mass ratio of the polyvinyl alcohol solution, the expanded graphite, the acid modified diatomite and the saturated boric acid solution is 4: 0.7: 0.6: 0.4.
in this example, a sample of wastewater was taken from a certain dyeing mill, Hainin, and the pH of the wastewater was 6.30, and the total phosphorus content was 17.40 mg/L. 2 pieces of blank carriers, carriers containing bacteria, and modified carriers containing bacteria were placed in conical flasks containing L m of wastewater, respectively, and reacted in a constant temperature oscillator (30 ℃, 160r/min), and samples were taken after 24 hours, 48 hours, and 72 hours, respectively, to measure the total phosphorus content of the wastewater, and the results are shown in Table 8, in which each experiment was conducted in parallel with 2 groups.
TABLE 8
Figure BDA0002403153120000092
Example 9
A water treatment biofilm carrier with bacteria promoting performance is prepared by the following steps:
(1) preparing a polyvinyl alcohol solution (which needs to be heated to 70-75 ℃ for dissolution) with the mass fraction of 8% and a saturated boric acid solution;
(2) preparing acid modified diatomite by weighing 10g diatomite in 200m L beaker, adding 100m L water, adding 20m L concentrated hydrochloric acid, reacting for 4h under electromagnetic stirring to remove acid soluble substances, filtering, and washing until no Cl exists-Drying the ions in an oven at 100 ℃ for later use;
(3) slowly adding the expanded graphite and the acid modified diatomite into a polyvinyl alcohol solution, stirring for 30min until the mixture is uniformly mixed, completely immersing 3cm by 3cm porous filter cotton (water treatment biomembrane carrier) into the solution until the solution is saturated by adsorption, fishing out the filter cotton, airing until no obvious water drops exist, and then putting the filter cotton into a saturated boric acid solution to be solidified for 30min to obtain the modified water treatment biomembrane carrier.
Wherein the mass ratio of the polyvinyl alcohol solution, the expanded graphite, the acid modified diatomite and the saturated boric acid solution is 4: 0.7: 1.0: 0.4.
in this example, a sample of wastewater was taken from a certain dyeing mill, Hainin, and the pH of the wastewater was 6.30, and the total phosphorus content was 17.40 mg/L. 2 pieces of blank carriers, carriers containing bacteria, and modified carriers containing bacteria were placed in conical flasks containing L m of wastewater, respectively, and reacted in a constant temperature oscillator (30 ℃, 160r/min), and samples were taken after 24 hours, 48 hours, and 72 hours, respectively, to measure the total phosphorus content of the wastewater, and the results are shown in Table 9, in which each experiment was conducted in parallel with 2 groups.
TABLE 9
Figure BDA0002403153120000101
Example 10
A water treatment biofilm carrier with bacteria promoting performance is prepared by the following steps:
(1) preparing a polyvinyl alcohol solution (which needs to be heated to 70-75 ℃ for dissolution) with the mass fraction of 8% and a saturated boric acid solution;
(2) preparing acid modified diatomite by weighing 10g diatomite in 200m L beaker, adding 100m L water, adding 20m L concentrated hydrochloric acid, reacting for 4h under electromagnetic stirring to remove acid soluble substances, filtering, and washing until no Cl exists-Drying the ions in an oven at 100 ℃ for later use;
(3) slowly adding the expanded graphite and the acid modified diatomite into a polyvinyl alcohol solution, stirring for 30min until the mixture is uniformly mixed, completely immersing 3cm by 3cm porous filter cotton (water treatment biomembrane carrier) into the solution until the solution is saturated by adsorption, fishing out the filter cotton, airing until no obvious water drops exist, and then putting the filter cotton into a saturated boric acid solution to be solidified for 30min to obtain the modified water treatment biomembrane carrier.
Wherein the mass ratio of the polyvinyl alcohol solution, the expanded graphite, the acid modified diatomite and the saturated boric acid solution is 4: 0.7: 0.3: 0.2.
in this example, a sample of wastewater was taken from a certain dyeing mill, Hainin, and the pH of the wastewater was 6.30, and the total phosphorus content was 17.40 mg/L. 2 pieces of blank carriers, carriers containing bacteria, and modified carriers containing bacteria were placed in conical flasks containing L m of wastewater, respectively, and reacted in a constant temperature oscillator (30 ℃, 160r/min), and samples were taken after 24 hours, 48 hours, and 72 hours, respectively, to measure the total phosphorus content of the wastewater, and the results are shown in Table 10, in which each experiment was conducted in parallel with 2 groups.
Watch 10
Figure BDA0002403153120000111
Example 11
A water treatment biofilm carrier with bacteria promoting performance is prepared by the following steps:
(1) preparing a polyvinyl alcohol solution (which needs to be heated to 70-75 ℃ for dissolution) with the mass fraction of 8% and a saturated boric acid solution;
(2) preparing acid modified diatomite by weighing 10g diatomite in 200m L beaker, adding 100m L water, adding 20m L concentrated hydrochloric acid, reacting for 4h under electromagnetic stirring to remove acid soluble substances, filtering, and washing until no Cl exists-Drying the ions in an oven at 100 ℃ for later use;
(3) slowly adding the expanded graphite and the acid modified diatomite into a polyvinyl alcohol solution, stirring for 30min until the mixture is uniformly mixed, completely immersing 3cm by 3cm porous filter cotton (water treatment biomembrane carrier) into the solution until the solution is saturated by adsorption, fishing out the filter cotton, airing until no obvious water drops exist, and then putting the filter cotton into a saturated boric acid solution to be solidified for 30min to obtain the modified water treatment biomembrane carrier.
Wherein the mass ratio of the polyvinyl alcohol solution, the expanded graphite, the acid modified diatomite and the saturated boric acid solution is 4: 0.7: 0.3: 0.6.
in this example, a sample of wastewater was taken from a certain dyeing plant, Hainin, and the pH of the wastewater was 6.30, and the total phosphorus content was 17.40 mg/L. 2 pieces of blank carriers, carriers containing bacteria, and modified carriers containing bacteria were placed in conical flasks containing L m of wastewater, respectively, and reacted in a constant temperature oscillator (30 ℃, 160r/min), and samples were taken after 24 hours, 48 hours, and 72 hours, respectively, to measure the total phosphorus content of the wastewater, and the results are shown in Table 11, in which each experiment was conducted in parallel with 2 groups.
TABLE 11
Figure BDA0002403153120000121
The biological membrane carrier not only can provide an attaching space for microorganisms, but also has a good promoting effect on the growth of the microorganisms, and can be used for the treatment of industrial wastewater and municipal sewage, the ecological restoration of eutrophic water bodies (such as lakes and rivers) and the like.

Claims (9)

1. A water treatment biofilm carrier with bacteria-promoting properties, which is characterized in that: the biological membrane carrier comprises the following raw materials: the modified polyvinyl alcohol solution comprises a polyvinyl alcohol solution, expanded graphite, acid modified diatomite and a saturated boric acid solution, wherein the mass ratio of the polyvinyl alcohol solution to the expanded graphite to the acid modified diatomite to the saturated boric acid solution is 4: 0.3-1: 0.1-1: 0.2 to 0.6.
2. The water treatment biofilm carrier having bacteria-promoting properties of claim 1, wherein: the acid modified diatomite is prepared by the following method: weighing diatomite in a beaker, adding water, adding concentrated hydrochloric acid, and stirring for reaction; and then carrying out suction filtration, washing and drying to obtain the acid modified diatomite.
3. The water treatment biofilm carrier having bacteria-promoting properties of claim 1, wherein: the mass ratio of the polyvinyl alcohol solution to the expanded graphite to the acid-modified diatomite to the saturated boric acid solution is 4: 0.7: 0.3: 0.4.
4. a method for preparing the water treatment biofilm carrier with the bacteria promoting performance of claim 1, which is characterized by comprising the following steps:
(1) preparing a polyvinyl alcohol solution and a saturated boric acid solution;
(2) slowly adding the expanded graphite and the acid modified diatomite into a polyvinyl alcohol solution, stirring until the mixture is uniformly mixed, completely immersing the porous filter cotton into the solution until the solution is saturated by adsorption, taking out the filter cotton, slightly airing the filter cotton, and putting the filter cotton into a saturated boric acid solution for curing after no obvious water drops exist, thereby obtaining the modified water treatment biomembrane carrier.
5. The method for preparing a water treatment biofilm carrier with bacteria-promoting performance according to claim 4, wherein the method comprises the following steps: the mass fraction of the polyvinyl alcohol solution is 5-15%.
6. The method for preparing a water treatment biofilm carrier with bacteria-promoting performance according to claim 4, wherein the method comprises the following steps: the acid modified diatomite is prepared by the following method: weighing diatomite in a reactor, adding water, adding concentrated hydrochloric acid, and stirring for reaction; and then carrying out suction filtration, washing and drying to obtain the acid modified diatomite.
7. The preparation method of the water treatment biofilm carrier with the bacteria promoting performance according to claim 6, which is characterized by comprising the following steps:
(1) preparing a polyvinyl alcohol solution with the mass fraction of 8% and a saturated boric acid solution;
(2) the preparation method of acid modified diatomite comprises weighing 10g diatomite in 200m L beaker, adding 100m L water, adding 20m L concentrated hydrochloric acid, reacting under electromagnetic stirring for 4 hr, vacuum filtering, and washing until no Cl is formed-Drying the ions in an oven at 100 ℃ for later use;
(3) slowly adding the expanded graphite and the acid modified diatomite into a polyvinyl alcohol solution, stirring for 30-60 min until the mixture is uniformly mixed, completely immersing 3cm by 3cm porous filter cotton into the solution until the solution is saturated by adsorption, fishing out the filter cotton, drying until no obvious water drops exist, and then putting the filter cotton into a saturated boric acid solution for curing for 25-35 min to obtain the modified water treatment biomembrane carrier.
8. The method for preparing a water treatment biofilm carrier with bacteria-promoting performance according to claim 7, wherein the method comprises the following steps: the mass ratio of the polyvinyl alcohol solution to the expanded graphite to the acid-modified diatomite to the saturated boric acid solution is 4: 0.7: 0.3: 0.4.
9. the application of the water treatment biofilm carrier with the bacteria promoting performance in printing and dyeing industrial wastewater, municipal sewage and river water according to any one of claims 1 to 8.
CN202010153218.6A 2020-03-06 2020-03-06 Water treatment biofilm carrier with bacteria promoting performance and preparation method and application thereof Active CN111439824B (en)

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CN110563127A (en) * 2019-08-26 2019-12-13 天津市环境保护技术开发中心设计所 preparation method of modified polyurethane sponge filler for MBBR (moving bed biofilm reactor) process emergency

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CN103159330A (en) * 2013-04-07 2013-06-19 武汉钢铁(集团)公司 Porous light-weight carbon-based biological carrier and preparation method thereof
CN103951082A (en) * 2014-04-04 2014-07-30 北京工业大学 Preparation and application of denitrifying bacteria immobilized fixed-type bioactive fillers with textile fabrics and polyvinyl alcohol non-woven fabrics as carriers
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