CN107297135B - Utilize flocculation yeast to absorb formaldehyde purification device of degradation formaldehyde - Google Patents

Utilize flocculation yeast to absorb formaldehyde purification device of degradation formaldehyde Download PDF

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CN107297135B
CN107297135B CN201710552548.0A CN201710552548A CN107297135B CN 107297135 B CN107297135 B CN 107297135B CN 201710552548 A CN201710552548 A CN 201710552548A CN 107297135 B CN107297135 B CN 107297135B
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formaldehyde
yeast
chamber
flocculation
culture
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CN107297135A (en
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刘晨光
闻远
曹莲莹
覃锦程
李凯
夏娟
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Shanghai Jiaotong University
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    • 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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L9/00—Disinfection, sterilisation or deodorisation of air
    • A61L9/015—Disinfection, sterilisation or deodorisation of air using gaseous or vaporous substances, e.g. ozone
    • A61L9/02—Disinfection, sterilisation or deodorisation of air using gaseous or vaporous substances, e.g. ozone using substances evaporated in the air by heating or combustion
    • A61L9/03—Apparatus therefor
    • 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
    • B01D53/346—Controlling the process
    • 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
    • B01D53/46—Removing components of defined structure
    • B01D53/72—Organic compounds not provided for in groups B01D53/48 - B01D53/70, e.g. hydrocarbons
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2209/00—Aspects relating to disinfection, sterilisation or deodorisation of air
    • A61L2209/10—Apparatus features
    • A61L2209/11—Apparatus for controlling air treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/95—Specific microorganisms
    • 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 a formaldehyde purification device for absorbing and degrading formaldehyde by using flocculating yeast, which comprises a purification chamber; the purification chamber is internally provided with a culture chamber for culturing the flocculating yeast; the side wall enclosing the culture chamber comprises a porous support frame and an expanded polytetrafluoroethylene film; a porous film and/or a porous filler is arranged in the culture chamber and is used for fixing mannose so as to crosslink and fix the flocculated yeast cells; the air pump is arranged in the purifying chamber and used for pumping the air outside the purifying chamber into the culture chamber, and the formaldehyde in the air is absorbed and degraded by the flocculating yeast through the porous film and/or the porous filler for purification. Preferably, an ORP monitoring system is also included for monitoring the oxidation-reduction potential of the flocculated yeast culture fluid and thereby knowing the operating efficiency of the device. The formaldehyde purification device disclosed by the invention can be used for intelligently and environmentally removing formaldehyde, and provides another development way for formaldehyde purification.

Description

Utilize flocculation yeast to absorb formaldehyde purification device of degradation formaldehyde
Technical Field
The invention relates to the technical field of air purifiers, relates to a device for purifying indoor formaldehyde air pollution, and particularly relates to a formaldehyde purification device for absorbing and degrading formaldehyde by using flocculating yeast.
Background
Formaldehyde is located in the deep layer of artificial boards, so that the release of formaldehyde from indoor building materials and office appliances is a slow, continuous and uninterrupted process, making it easy for people living indoors to have access to low-dose formaldehyde for a long time. Formaldehyde has many adverse effects on human health. At present, the method for purifying formaldehyde which is a main indoor air pollutant comprises various methods such as an activated carbon method, a bamboo charcoal method, a photocatalyst method, a synthetic fiber method, an anion generator method, a cold catalyst method, an electrostatic method, a green plant absorption method and the like, but the formaldehyde treatment methods have some defects.
Except for the green plant absorption method, most of formaldehyde treatment methods can be independently applied to the air purifier, and can play a role in the same air purifier through synergistic action. However, studies have shown that the purification effect of the existing air purifier in the market is not better than that of the single activated carbon, and the quality of the existing air purifier is not good and can not meet the requirements of daily life according to the purification effect and purification capacity measured by different measurement standards. In addition, the purification ability of green plants is greatly affected by seasons, climate, temperature and humidity, and the fluctuation of air purification effect is large, so that it is not suitable for long-term air purification.
Disclosure of Invention
In order to realize the removal of formaldehyde more quickly, intelligently, efficiently, thoroughly and environmentally, the invention of the formaldehyde purifier which has a different principle from the existing air purifier is very necessary. The invention discloses a formaldehyde purification device for absorbing and degrading formaldehyde by using flocculating yeast, which comprises a purification chamber; the purification chamber is internally provided with a culture chamber for culturing the flocculating yeast; the side wall enclosing the culture chamber comprises a porous support frame and an expanded polytetrafluoroethylene film; a porous film and/or a porous filler is arranged in the culture chamber and is used for fixing mannose so as to crosslink and fix the flocculated yeast cells; the air pump is arranged in the purifying chamber and used for pumping the air outside the purifying chamber into the culture chamber, and the formaldehyde in the air is absorbed and degraded by the flocculating yeast through the porous film and/or the porous filler for purification. The porous support frame provides support for the side wall and is water-permeable and air-permeable; the expanded polytetrafluoroethylene film is breathable and impermeable, and the outflow of culture solution is avoided. The cleaned air is exhausted outside the clean room, preferably from the top of the clean room.
In one embodiment, the culture chamber is a multi-layered sandwich structure, i.e., separated into multiple sandwich spaces by multiple porous membranes, providing attachment sites for the flocculated yeast cells. Under the effect of the air pump, the air is discharged through the multi-layer porous film, so that a better purification effect is achieved.
In another embodiment, the culture chamber is a packed structure or a combination of packed and multiple sandwich structures; the filler type structure means that porous filler is arranged in the culture chamber to provide attachment sites for the flocculation yeast cells; the structure of combining the filling type and the multiple interlayers means that the culture chamber is divided into a plurality of interlayer spaces by a plurality of layers of porous films, and the interlayer spaces are provided with porous filling materials to provide attachment sites for flocculating yeast cells.
Furthermore, an inner chamber is also arranged in the purification chamber; the side wall of the inner chamber comprises a porous supporting frame and an expanded polytetrafluoroethylene film; the inner chamber is wrapped in the culture chamber, and the inner chamber and the culture chamber are separated by a side wall of the inner chamber; the air pump is arranged in the inner chamber; a device cleaning system is also arranged in the inner chamber and used for providing a deflocculation solution; the device cleaning system is communicated with the culture chamber through a conveying pipeline; the inner chamber is provided with a temperature and humidity control system for maintaining the growth condition of the flocculation yeast cells. Preferably, the deflocculating solution comprises one or more of EDTA, sodium citrate and mannose. EDTA and sodium citrate are used for deflocculating by removing calcium ions required by flocculation of flocculation yeast; mannose deflocculation is achieved by competitive inhibition. The flocculating yeast culture solution contains Ca2+。
Furthermore, an auxiliary device is also arranged in the inner chamber, and the auxiliary device comprises an aromatherapy device; the aromatherapy steam generated by the aromatherapy device is discharged from the top of the purifying chamber; the aromatherapy device is controlled by an aromatherapy control key on the outer wall of the purification chamber. Preferably, the fragrance device is a fragrance lamp device.
Further, the system also comprises a real-time quantitative monitoring system for the formaldehyde content; a formaldehyde detection element connected with a formaldehyde content real-time quantitative monitoring system is arranged in the inner chamber; the outer surface of the formaldehyde purification device for absorbing and degrading formaldehyde by utilizing the flocculating yeast is also provided with a formaldehyde detection element connected with a formaldehyde content real-time quantitative monitoring system.
Further, the device also comprises a spraying system; the spraying system comprises a culture solution spraying pipeline; the top of the culture chamber is provided with a feed inlet and a culture solution spraying pipeline; the bottom of the culture chamber is provided with a rotary cleaning device and a drainage pipeline.
Further, the device also comprises a temperature control system and a pH control system which are respectively used for controlling the temperature and the pH value of the flocculating yeast culture solution in the culture chamber.
Further, still include oxidation-reduction potential (ORP) monitoring system for the oxidation-reduction potential of the flocculation yeast culture solution in the monitoring culture room, and then know the work efficiency of utilizing the formaldehyde purifier of flocculation yeast absorption degradation formaldehyde. Preferably, the ORP monitoring system includes a sensor constructed of an inert metal (e.g., platinum, rhodium, iridium, gold) and a reference electrode that is Ag/AgCl. The ORP monitoring system is located within the clean room.
Further, the flocculation yeast is flocculation yeast SPSC01, CGMCC 0587. The flocculation yeast SPSC01 is a fusion strain of chestnut wine fission yeast (Schizosaccharomyces pombe Lindner 2.1461) and saccharomyces cerevisiae (Saccharomyces cerevisiae 2.607), and is preserved in China general microbiological culture Collection center (CGMCC, China, Beijing) at 5-20 days 2001 with the accession number of CGMCC 0587 (see patent CN 1436851A).
Furthermore, the cleaning system of the device is controlled by a cleaning control key arranged on the outer surface of the formaldehyde purification device. The external surface of the formaldehyde purification device is also provided with a yeast survival state indicator light and/or a formaldehyde content indicator light which are connected with the ORP monitoring system and/or the formaldehyde real-time quantitative determination system. The yeast survival status indicator lamp is used for prompting a user whether to replace fresh flocculated yeast cells. Such as: if the yeast survival state indicator light is green, the growth state of the flocculated yeast in the device is good, and the device works normally; if the yeast survival status indicator light is red, then the fresh flocculation yeast cells need to be replaced. Conversely, the same may be true. The formaldehyde content indicator lamp is connected with the real-time quantitative monitoring system of formaldehyde content for provide the formaldehyde content in the indoor air for the user in real time, namely the formaldehyde content in the air before purification.
The principle of the invention is as follows:
yeast fineThe cell culture solution (i.e., the flocculation yeast culture solution) uses water as a solvent, and a small amount of nutrients such as glucose is added to maintain the growth of cells. The yeast metabolizes formaldehyde to generate carbon dioxide and water, and secondary release of formaldehyde is avoided. Thus, formaldehyde gas can be efficiently absorbed and removed by the yeast cell culture solution. At present, the research of flocculating yeast has been developed primarily. According to the existing results, the flocculation of the yeast is mainly controlled by flocculation genes (FLO), and the flocculation removal of yeast cells can be regulated and controlled by regulating and controlling the expression of FLO1, FLO5 and FLO11 genes. Among them, flocculation of flocculation yeast of flo1 type is mainly based on the ability to form hydrogen bonds between mannose residues and proteins on its surface. Flocculation protein on yeast cell wall, in the presence of calcium ion, and other yeast cell wall mannose residues specific binding caused yeast flocculation, calcium ion role is to make flocculation protein maintain the correct conformation. When Ca is added to the culture solution of the flocculated yeast2+In time, flocculation of the yeast is enhanced due to the calcium bridge linkage; and Ca when EDTA or sodium citrate is added2+Removed and yeast cells deflocculated. Or when sugar substances such as mannose are added, the free mannose and mannose on the surface of the yeast cells compete to bind with proteins on the surface of the flocculated yeast cells, so that flocculation is weakened, and the yeast cells are subjected to flocculation breaking. Thus, by adding Ca2+The solution, EDTA, sodium citrate or mannose can artificially control whether the yeast cells flocculate or not, which lays a foundation for the material replacement of the yeast.
The oxidation-reduction potential (ORP) is the solution's ability to gain and lose electrons, in millivolts (mV). The high ORP value represents that the solution has stronger electron acquisition capability and is in an oxidation state; a low ORP value represents an increased ability of the solution to donate electrons, being in a reducing state. Extracellular ORP values can be reflected as net results of intracellular electron transfer and redox balance, and ORP monitoring systems include a sensor constructed of an inert metal (e.g., platinum, rhodium, iridium, gold) and a reference electrode, typically Ag/AgCl. The activity of the yeast cells in the culture solution can be reflected by the level of ORP.
The invention relates to a method for effectively absorbing and metabolizing formaldehyde in air by using a flocculating yeast cell which is attached to a porous film. The growth state of the yeast cells was monitored in real time using an ORP monitoring system. The flocculation yeast cell is all in Ca2+Yeast cells flocculated under the action of the enzyme.
Has the advantages that:
1. the flocculated yeast cells are attached to the porous film and/or the porous filler and can simulate the large-specific-surface-area structure of the alveoli; a solution environment created by the yeast culture solution in the interlayer of the device and a temperature control system built in the device can simulate a warm and humid environment of the lung; the yeast cells are used to mimic and outweigh the efficient metabolism of formaldehyde by human cells.
2. Can utilize the flocculating yeast to realize the effective absorption and metabolism of formaldehyde in the air and convert the formaldehyde into pollution-free carbon dioxide, and has thorough, environment-friendly and efficient process.
3. The multi-layer sandwich structure and the filler structure or the combination thereof can provide multiple sites for the attachment of cells and increase the contact area of the device and formaldehyde air.
4. The air pump can accelerate the circulation of indoor air in the device, and effectively improve the efficiency of formaldehyde treatment by the device.
5. The temperature control system, the pH control system and the culture solution spraying system can ensure that cells grow in a proper environment and maintain a higher formaldehyde metabolism rate.
6. The built-in ORP monitoring system monitors the growth state of yeast cells in real time by measuring the oxidation-reduction potential of cell culture solution, and maintains the higher-level formaldehyde treatment efficiency of the device.
7. The formaldehyde content real-time monitoring system can monitor the formaldehyde content of air in the environment, and accordingly judges whether the device needs to be used or not; the formaldehyde content of the purified air can also be monitored, so that whether the equipment works well or not is prompted.
8. The integrated auxiliary device such as an aromatherapy device can release pleasant perfume and essential oil steam while purifying formaldehyde air, and has the functions of refreshing, restoring consciousness or calming and sleeping.
9. The flocculation yeast modified by the genetic engineering means can be attached to an attachment point to effectively degrade formaldehyde in the air.
Drawings
FIG. 1 is a schematic structural diagram of a formaldehyde purification device according to an embodiment of the present invention, which uses flocculation yeast to absorb and degrade formaldehyde.
FIG. 2 is a schematic view of a multi-layered structure.
Figure 3 is a schematic representation of a packed and multiple sandwich combined structure.
Fig. 4 is an enlarged view of the porous packing in fig. 3.
Detailed Description
The invention is further described below with reference to the following figures and examples. The flocculating yeast of the invention can be all Ca capable2+The yeast flocculated under the action of the enzyme is such as flocculated yeast SPSC01, CGMCC 0587.
Example 1
Fig. 1 illustrates one embodiment of the present invention. In this embodiment, the formaldehyde purification device for absorbing and degrading formaldehyde by using flocculating yeast comprises a purification chamber, a formaldehyde content real-time quantitative monitoring system, a spraying system, a temperature control system, a pH control system, an ORP monitoring system and an air circulation system.
The clean room comprises a culture chamber 1 and an inner chamber 14. Inner chamber 14 is enclosed within growth chamber 1. The culture chamber 1 is a multi-layered sandwich structure, i.e. is divided into a plurality of sandwich spaces by a plurality of porous membranes 3, here 4 layers, but not limited to 4 layers. Fig. 2 shows the multi-layer sandwich structure, which is formed by 5 layers of porous films 3 to form 4 layers of sandwich spaces. The porous membrane 3 functions to immobilize mannose. The flocculated yeast is also immobilized on the porous membrane 3 after cross-linking binding with mannose on the porous membrane 3.
In view of the support problem, a porous support frame was introduced. The multilayer sandwich structure in this embodiment is composed of a porous membrane 3 and a porous support frame. The porous membrane 3 is attached to the inner side wall of the porous support frame. The top of the culture chamber 1 is provided with a feed inlet 15 and a spray culture solution pipeline 2. The number of the spray culture solution pipes 2 is 8 in this embodiment, but the present invention is not limited to 8. The spray culture solution pipeline 2 belongs to a part of a spray system. The bottom of the culture chamber 1 is provided with a rotary washing device 7 and a drain pipe 8. The side walls enclosing the culture chamber 1 comprise a porous support frame and an expanded polytetrafluoroethylene membrane. The side walls of inner chamber 14 also comprise a porous support frame and an expanded polytetrafluoroethylene membrane, which function to separate inner chamber 14 from culture chamber 1. The hole supporting frame provides support and is water-permeable and air-permeable; the expanded polytetrafluoroethylene film is breathable and impermeable, and the outflow of culture solution is avoided. Thus, in this example there are 5 layers of porous membrane 3, 5 layers of porous support frame and 2 layers of expanded polytetrafluoroethylene membrane.
The inner chamber 14 is provided with an air pump 6 and a device cleaning system 4, and can also be added with an accessory device (such as a fragrance lamp, fragrance steam generated by the fragrance device is discharged from the top of the purifying chamber, the fragrance device is controlled by a fragrance control key on the outer wall of the purifying chamber, the fragrance device comprises a water tank, and the release of the fragrance steam can be adjusted by heating the water tank). Under the action of the air pump 6, air outside the purification chamber (air before purification) is pumped into the culture chamber 1 through the expanded polytetrafluoroethylene film, the porous support frame and the porous film 3 as shown by a horizontal arrow outside the culture chamber 1 in fig. 1, and formaldehyde in the degraded air is absorbed by the flocculating yeast and purified. The cleaned air is discharged from the top of the clean room as indicated by the upward arrows in fig. 1.
The apparatus cleaning system 4 is filled with a deflocculating solution, such as EDTA solution, sodium citrate and/or mannose, which can be fed into the cultivation room 1 through a feeding pipe as required.
A formaldehyde detection element 5 connected with a formaldehyde content real-time quantitative monitoring system is also arranged in the inner chamber 14; the outer wall of the purifying chamber is also provided with a formaldehyde detecting element 5 connected with a formaldehyde content real-time quantitative monitoring system.
The ORP monitoring system includes a sensor 10 and a reference electrode 9, the sensor 10 being composed of an inert metal (e.g., platinum, rhodium, iridium, gold) and the reference electrode 9 being Ag/AgCl. ORP monitoring system sets up in the clean room, and sensor 10 and reference electrode 9 all stretch into in the flocculation yeast culture solution in the culture chamber to the growth state of monitoring flocculation yeast is in order to know the work efficiency of device, and then confirms whether need to change fresh cultured cell.
The use of the device is as follows:
activation of flocculating yeast cells. The flocculation yeast dry powder and the activating liquid are mixed according to a certain proportion and added from a feed inlet 15. At this point, the flocculated yeast cells cross-link with mannose immobilized on the porous membrane into clusters.
The yeast survival status indicator 13 connected to the ORP monitoring system and/or the formaldehyde real-time quantitative determination system can indicate to the user whether the replacement of fresh flocculated yeast cells is required. Such as: if the yeast survival state indicator light 13 is green, the growth state of the flocculated yeast in the device is good, and the device works normally; if the yeast survival status indicator light 13 is red, then the fresh flocculation yeast cells need to be replaced.
The method for replacing the fresh flocculated yeast cells comprises the following steps: the drain line 8 is opened, and the drain line 8 is closed after the yeast cell culture solution in the culture chamber 1 is drained. According to washing control key 11, then in the device cleaning system 4 the solution of flocculating flowing income cultivates room 1, the flocculation yeast is separated out of the fibre, and rotatory belt cleaning device 7 assists and washes the intermediate layer, will separate out after the fibre liquid is discharged completely, add fresh flocculation cell culture liquid toward the charge door again, accomplish remodeling of this device promptly.
The user can decide whether to add some accessory devices such as an aromatherapy device into the inner room according to specific requirements, and selectively allocate essential oil for refreshing and restoring consciousness or calming and sleeping, and the essential oil is added into the aromatherapy device of the accessory devices; after the aromatherapy device is started, the essential oil components are released into the air while the air is purified. The function can be switched on or off through the aromatherapy control key according to the personal requirements of users.
Because the formaldehyde detecting element 5 which is directly contacted with indoor air and is connected with the real-time quantitative monitoring system of the formaldehyde content is arranged on the surface of the device, the content of the indoor formaldehyde can be provided for users in real time and displayed on the formaldehyde content indicator lamp 12. When the formaldehyde content exceeds 0.1mg/m3The number is red, so that the user is reminded that the room is not suitable for long-term use; when the formaldehyde content is less than 0.1mg/m3The number is green, which indicates that the indoor formaldehyde content reaches the standard and is suitable for people to live for a long time.
When the device is used, the air pump 6 is opened, indoor air (air before purification) enters the culture chamber 1 through the porous membrane 3, and formaldehyde is metabolized into water and carbon dioxide under the action of the flocculating yeast, so that the air is purified. The purified air is discharged from the top of the purification chamber. The flocculated yeast is bound to mannose immobilized on the porous membrane 3 and thus enriched on the porous membrane 3. Because of the structure of the multi-layer porous film 3, the air is purified by multiple layers, and the complete removal of formaldehyde is ensured.
Example 2
This example is substantially the same as example 1 except that the culture chamber is of a packed structure. That is, the flocculation yeast is fixed by filling the culture chamber 1 with a porous filler 21 (shown in FIG. 4) to which mannose residues are fixed. After the flocculation yeast cells are activated, flocculation protein of the flocculation yeast cells is fixed with mannose on the surface of the porous filler 21 in a cross-linking mode, and the porous filler 21 provides multiple attachment sites for the flocculation yeast cells, so that the contact area between indoor formaldehyde and the flocculation yeast cells is enlarged.
Example 3
This example is substantially the same as example 1 except that the culture chamber has a structure in which a packed structure and a multi-layer structure are combined. That is, the flocculation yeast is immobilized by filling a sandwich structure composed of the porous film 3 with a porous filler 21 (as shown in FIG. 4) to which mannose residues are immobilized (the number of the sandwich is determined as needed, and generally ranges from 1 to 10 layers, and only one layer of the structure is shown in FIG. 3). The flocculation protein of the activated flocculation yeast cells is fixed with the mannose on the surface of the porous filler 21 in a cross-linking way, and on the basis of a sandwich structure (especially a multilayer sandwich structure) formed by the porous film 3, the porous filler 21 provides multiple attachment sites for the flocculation yeast cells so as to further increase the contact area between the indoor formaldehyde and the flocculation yeast cells.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.

Claims (10)

1. A formaldehyde purification device for absorbing and degrading formaldehyde by using flocculating yeast is characterized by comprising a purification chamber; the purification chamber is internally provided with a culture chamber for culturing flocculation yeast; the side wall enclosing the culture chamber comprises a porous support frame and an expanded polytetrafluoroethylene film; a porous film and/or a porous filler is/are arranged in the culture chamber and used for fixing mannose so as to cross-link and fix flocculation yeast cells, and the flocculation yeast is FLO1 type flocculation yeast; the purification chamber is also internally provided with an air suction pump which is used for sucking the air outside the purification chamber into the culture chamber, and the formaldehyde in the degraded air is absorbed and purified by the flocculating yeast through the porous film and/or the porous filler.
2. The formaldehyde purification device using flocculation yeast to absorb and degrade formaldehyde as claimed in claim 1, wherein the culture chamber is a multi-layered sandwich structure, which is divided into multiple sandwich spaces by multiple layers of the porous membrane, and provides attachment sites for flocculation yeast cells.
3. The formaldehyde purification device for absorbing and degrading formaldehyde by utilizing the flocculating yeast as claimed in claim 1, wherein the culture chamber is of a filler type structure or a structure combining the filler type structure and a multi-interlayer structure; the filler type structure means that the culture chamber is internally provided with the porous filler to provide attachment sites for flocculating yeast cells; the structure that filler formula and many interlayers combine together means that the culture room is divided into a plurality of interlayer spaces by multilayer porous film, and be equipped with in the interlayer space porous filler provides the attachment site for flocculation yeast cell.
4. The formaldehyde purification device for absorbing and degrading formaldehyde by utilizing the flocculating yeast as claimed in claim 1, wherein an inner chamber is further arranged in the purification chamber; the side wall of the inner chamber comprises a porous supporting frame and an expanded polytetrafluoroethylene film; the inner chamber is enclosed within the culture chamber, the inner chamber and the culture chamber being separated by a sidewall of the inner chamber; the air suction pump is arranged in the inner chamber; a device cleaning system is also arranged in the inner chamber and used for providing a deflocculating liquid; the device cleaning system is communicated with the culture chamber through a conveying pipeline.
5. The formaldehyde purification device for absorbing and degrading formaldehyde by utilizing the flocculating yeast as claimed in claim 4, wherein an auxiliary device is further arranged in the inner chamber, and the auxiliary device comprises an aromatherapy device; the aromatherapy steam generated by the aromatherapy device is discharged from the top of the purifying chamber; the aromatherapy device is controlled through an aromatherapy control key on the outer wall of the purification chamber; the inner chamber is provided with a temperature and humidity control system for maintaining the growth condition of the flocculation yeast cells.
6. The formaldehyde purification device for absorbing and degrading formaldehyde by utilizing flocculating yeast as claimed in claim 4, further comprising a formaldehyde content real-time quantitative monitoring system; a formaldehyde detection element connected with the real-time quantitative formaldehyde content monitoring system is arranged in the inner chamber; and a formaldehyde detection element connected with the real-time quantitative formaldehyde content monitoring system is also arranged on the outer surface of the formaldehyde purification device for absorbing and degrading formaldehyde by utilizing flocculating yeast.
7. The formaldehyde purification device for absorbing and degrading formaldehyde by utilizing the flocculating yeast as claimed in claim 1, further comprising a spraying system; the spraying system comprises a culture solution spraying pipeline; the top of the culture chamber is provided with a feed inlet and the spray culture solution pipeline; the bottom of the culture chamber is provided with a rotary cleaning device and a drainage pipeline.
8. The formaldehyde purification device using flocculation yeast to absorb and degrade formaldehyde as claimed in claim 1, further comprising a temperature control system and a pH control system for controlling the temperature and pH of the flocculation yeast culture solution in the culture chamber respectively.
9. The formaldehyde purification device using flocculation yeast to absorb and degrade formaldehyde as claimed in claim 1, further comprising an ORP monitoring system for monitoring the oxidation-reduction potential of the flocculation yeast culture solution in the culture chamber, so as to obtain the working efficiency of the formaldehyde purification device using flocculation yeast to absorb and degrade formaldehyde.
10. The formaldehyde purification device using flocculation yeast to absorb and degrade formaldehyde as claimed in any of claims 1-9, wherein the flocculation yeast is flocculation yeast SPSC01, CGMCC 0587.
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