45 results about "Microbial adhesion" patented technology

The invention relates to the technical field of sewage treatment, in particular to an electromagnetic wave sludge reduction community structure regulation and control method for improving microorganism adhesion. The method comprises the following steps: 1) treating sewage by adopting an A / A / O reactor, and stably operating for a period of time; 2) introducing part of the sludge obtained in the secondary sedimentation tank as return sludge into the anaerobic tank, and continuously exciting the return sludge by electromagnetic waves to improve the surface performance of the sludge in the anaerobic tank, the anoxic tank and the aerobic tank; 3, part of the nitrification liquid in the aerobic tank serves as backflow nitrification liquid to be introduced into the anoxic tank, and the backflow nitrification liquid is continuously excited by electromagnetic waves so as to improve the surface performance of sludge in the anaerobic tank, the anoxic tank and the aerobic tank. By loading the electromagnetic waves, the adhesion characteristic of microorganisms can be improved, and the sludge reduction effect can be improved.

The application discloses a kind of synchronous denitrification and phosphorus removal light materials and its preparation and application method, belong to environmental functional materials and sewage treatment technical field.The application is obtained by fully melting and dispersing sulfur and iron-based component, and the iron-based component is a mixture of pyrite and calcium-magnesium carbonate.The molten mixture is foamed to form a synchronous denitrification and phosphorus removal light material.The synchronous denitrification and phosphorus removal light material has high porosity, large specific surface area, light weight and high reactivity.The light material is used as a microbial carrier and an electron donor for biochemical reactions, and is applied to fixed bed, fluidized bed and other reactors for sewage treatment.The light material has good microbial adhesion performance, high denitrification rate and good phosphorus removal effect.

The invention relates to the technical field of sewage treatment, and discloses a multi-index comprehensive evaluation method for performance comparison and selection of a sewage treatment filler, a scoring system including physical properties, chemical properties, biological properties and economic indexes is established, the physical properties include particle size, porosity and mechanical strength, and the chemical properties include adsorbability and ion exchange capacity; the biological properties comprise microbial adhesiveness and biological membrane activity, and the economical efficiency comprises filler cost and operation and maintenance cost. According to the method, multi-dimensional index fusion is adopted, physical, porosity, mechanical strength and chemical Langmuir adsorption models are integrated, biological electron microscope observation biological membrane coverage rate and economical efficiency LCCA analysis indexes are achieved, and full life cycle evaluation is achieved.

The invention relates to benzoxazine marine anti-corrosion and anti-fouling paint and a preparation method and application thereof. The preparation method comprises the following steps: mixing paraformaldehyde, 2-aminobenzothiazole and eugenol in a first organic solvent for reaction, cooling and filtering to obtain an intermediate; adding sulfydryl siloxane into the intermediate, and carrying out addition reaction, filtration and solvent removal to obtain benzoxazine resin containing siloxane groups; dissolving benzoxazine resin in a second organic solvent, dropwise adding a hydrophilic high-molecular polymer solution, and stirring for reaction to obtain a composite component; and mixing the composite component with an organosilicon heat-resistant paint, polycaprolactone and an auxiliary agent for reaction to obtain the benzoxazine marine anticorrosive antifouling paint. The hydrophobic benzoxazine resin and the hydrophilic high-molecular polymer are compounded to form the amphiphilic coating, then the amphiphilic coating and the high-cohesiveness polycaprolactone are subjected to covalent cross-linking, and the obtained coating is good in mechanical performance and corrosion resistance and capable of effectively inhibiting microbial adhesion, reducing biofilm formation and achieving the synergistic antifouling effect.

The invention relates to the technical field of wastewater treatment materials, in particular to a preparation method of a nano-hydroxyapatite-based composite material, which comprises the following steps: selecting high-density polyethylene as a continuous phase matrix material and nano-hydroxyapatite as a functional filler, adding a silane coupling agent as an interface modifier, and carrying out hydrophilic modification through a hydrophilic agent to obtain the nano-hydroxyapatite-based composite material. The composite material is obtained through nano-hydroxyapatite pretreatment, melt blending, physical foaming and molding processing. The composite material is applied to an MBBR (Moving Bed Biofilm Reactor) for wastewater treatment; the compressive strength of the obtained composite material is greater than or equal to 15 MPa, and the annual wear rate lt Meanwhile, the microporous structure of the nano-hydroxyapatite provides a large number of active sites for microorganism attachment, the biological membrane quantity of the system can reach 35 g / L, the ammonia nitrogen removal rate is increased by 30-50% compared with the prior art, and the phosphorus adsorption capacity reaches 8-10 mg / g.

The invention discloses a biofilm carrier suitable for low-temperature sewage treatment and a preparation method and application thereof.The biofilm carrier takes SiC ceramic as a biofilm framework, the upper portion of the SiC ceramic is coated with a photo-thermal agent to form a photo-thermal conversion functional area, the lower portion of the SiC ceramic is a microbial adhesion functional area, and meanwhile the upper portion of the SiC ceramic is loaded with temperature response type nanocapsules; and efficient photo-thermal conversion can be carried out, functional bacteria are adsorbed and enriched, the biomass is improved, and the bacterial activity is improved in a low-temperature environment. The preparation method of the biofilm carrier is simple, and the ammonia nitrogen removal rate is high after the biofilm carrier is applied to microbial wastewater treatment.

The application discloses a protein zwitterionic polymer conjugate and a preparation method and application thereof. A multifunctional new medical biomaterial with mucosal adhesion, wetting, lubrication and microbial adhesion prevention is designed and synthesized, so that a new breakthrough is brought to the clinical demand of solving Sjogren's syndrome. In addition, the application has wide application prospects in the fields of oral lubrication, ophthalmic lubrication, joint repair and the like.

This invention relates to the field of filter media technology, specifically to a modified fiber filter media, its preparation method, and a filter bed. The modified fiber filter media provided by this invention has a structure grafted onto it with the structure shown in formula (Ⅰ), where R1 in formula (Ⅰ) is (CH2). n The value of n ranges from 2 to 3. R2, R3, and R4 are independently selected from C1-C2 alkyl groups, R5 and R6 are independently selected from hydrogen and C1-C18 alkyl groups, and R7 is independently selected from at least one of C1-C18 alkyl groups or C1-C18 aromatic groups. This invention provides a group structure with strong hydrophobicity and antibacterial properties, which is beneficial for backwashing removal of pollutants. The hydrophobic surface can also reduce microbial adhesion and biofilm formation. Furthermore, the synthesized quaternary ammonium groups can disrupt the biofilm structure on the surface of the fiber filter media, improving the backwashing effect and regeneration capacity of the fiber filter media, and maintaining the long-term stable operation of the rapid filtration technology.

The application belongs to the technical field of electrochemical sensing, and particularly relates to an electrochemical sensing electrode with detection and anti-biofouling functions, a preparation method and application thereof. The electrochemical sensing electrode comprises a conductive substrate and a MOF-919 material loaded on the conductive substrate, and function mode switching is realized through external potential regulation. In the detection mode, a first working voltage is applied for nitrite oxidation detection; and a second working voltage is applied to release nitric oxide in situ by reducing nitrite to inhibit microbial adhesion on the electrode surface. The application does not need to additionally set an independent antibacterial layer or add an antibacterial agent, realizes the interface anti-microbial adhesion function while maintaining good electrochemical response performance of the electrode, and significantly improves the stability of long-term use in complex samples. The application provides a new technical path for anti-pollution design of an electrochemical sensing interface.

The invention relates to a high polymer material for resisting microbial film adhesion of a filter bag and a preparation method of the high polymer material, and belongs to the technical field of preparation of high polymer materials, organic functional groups such as carboxyl are introduced to the surface of SiO2 through a silane coupling agent to prepare a pretreated SiO2 filler, and then the pretreated SiO2 filler is used for enhancing PET to obtain SiO2-enhanced modified PET fibers. Finally, the fiber is soaked in protein subjected to acylation treatment, an amyloid protein layer is constructed on the surface of the fiber by reducing disulfide bonds, and the effect of preventing microbial adhesion is achieved. The anti-bioadhesion material prepared by the invention has the advantages of good mechanical properties and resistance to adhesion of microorganisms and algae.

This utility model provides a corrosion-resistant shell structure for a marine engineering platform, relating to the field of marine engineering platform technology. It includes: a support column body, with two protective devices on its surface. Each of the two protective devices is filled with filler, and multiple buffer devices are provided on the surface of each of the two protective devices. In this utility model, the impact of waves and splashes first strikes the protective plate surface, where it is buffered by springs and dampers, reducing the impact on the support column body and enhancing the service life of the protection. An antibacterial layer is coated on the outer side of the arc-shaped hollow protective shell to inhibit microbial adhesion and metabolic corrosion, while a plasma-polymerized coating is coated on the inner side of the arc-shaped hollow protective shell to increase the pitting potential of the stainless steel. Combined with an electromagnetic energy storage device, dynamic potential compensation is achieved. Furthermore, the metal support rods filled inside the arc-shaped hollow protective shell reduce resistance and potential fluctuations, resulting in a more uniform current distribution.

The invention discloses a microorganism colonization membrane assembly for river regulation, and relates to the technical field of river regulation, the microorganism colonization membrane assembly comprises a mounting box with an opening at the upper end, two partition plates are fixedly mounted in the mounting box at intervals, and the two partition plates sequentially divide the mounting box into a microorganism enrichment area, a metabolism diffusion area and a fluid exchange area from front to back; the three regions are respectively filled with a microorganism colonization membrane, a fluid flow guide membrane and a honeycomb membrane, and the side wall of one side, far away from the partition plates, of the microorganism enrichment region and the two partition plates are respectively provided with water permeable holes through which water flows to pass; the surface of the microbial colonization membrane is provided with nano-scale villus-shaped secondary ripples. According to the microorganism colonization membrane assembly for river regulation, through cooperation of the biological anchor points and the chemotactic factor coating, the microorganism attachment efficiency (the survival rate is increased by 40% or above) and the impact load resistance are remarkably improved, and the problems that in traditional biological remediation, microorganism colonization is difficult, and activity is low are solved.

The invention discloses a spiral modified MBBR filler as well as a preparation method and application thereof, and belongs to the technical field of sewage treatment. The filler takes high-density polyethylene (HDPE) as a matrix and comprises the following raw materials in parts by weight: 100-105 parts of HDPE, 7-9 parts of modified hydrotalcite, 4-6 parts of an auxiliary agent, 0.7-0.9 part of an initiator, 1-2 parts of polyvinyl alcohol, 1-2 parts of chitin, 1.5-3 parts of gelatin, 5-10 parts of activated carbon, 0.5-1 part of zinc stearate and 0.3-0.5 part of an EBS dispersing agent. By optimizing the material formula and the structural design, the filler is endowed with a three-dimensional spiral porous structure, the surface roughness and the biocompatibility of the filler are effectively enhanced, and the initial attachment of microorganisms and the formation of a biological membrane are remarkably promoted. Meanwhile, due to introduction of the composite additive, ultraviolet aging is effectively delayed, the service life of the filler is prolonged, it is guaranteed that the filler still keeps excellent degradation performance in a complex sewage environment, and the filler is suitable for efficient treatment of complex water quality.

This invention discloses a test method for evaluating the inhibitory effect of microbial pesticides on the activity of Daphnia macrocarpa, relating to the field of pesticide detection. The method includes an outer casing, a layered test cylinder, an air supply assembly, a water quality monitoring probe, and a light source. The outer casing has a hinged lid and a transparent observation window on its front. The layered test cylinder is housed within the outer casing. This method innovatively uses a layered test cylinder composed of a test cylinder, an isolation cylinder, and a pesticide loading cylinder. The Daphnia macrocarpa in the test cylinder is isolated from the microbial pesticide in the pesticide loading cylinder, but the water in the test cylinder and the pesticide loading cylinder exchange water through an exchange port. This method realistically simulates the natural exposure state of Daphnia macrocarpa in water containing microorganisms and effectively avoids the problem of microbial adhesion interfering with Daphnia macrocarpa activity, thus significantly improving the accuracy of the test results.

The utility model belongs to the technical field of sewage treatment, and relates to a Fenton sludge biochar artificial wetland coupling microbial fuel cell, which comprises a container main body, the container main body is in a cylindrical barrel shape, Fenton sludge biochar is filled in the barrel to enhance sewage treatment and microbial attachment effects, a water sampling port is arranged on the wall of the barrel, and a water sampling port is arranged on the wall of the barrel. A water outlet is formed in the bottom of the barrel, a water inlet is formed in the top of the barrel, a large gravel layer, a medium gravel layer, a medium gravel layer and a small gravel layer are sequentially arranged in the barrel from bottom to top, the Fenton mud biochar layer is arranged between the medium gravel layer and the medium gravel layer, the anode is embedded between the Fenton mud biochar layer and the medium gravel layer, and the cathode is located on the surface of the small gravel layer and exposed in the air. According to the device disclosed by the utility model, after the charcoal fired by the Fenton mud is added into the constructed wetland, the growth of heterotrophic denitrification and iron-related microorganisms can be stimulated, and the removal efficiency of nitrate nitrogen is improved. The battery can realize efficient nitrogen and phosphorus removal treatment of sewage, and has a relatively high application value.

The invention relates to a biological adhesion prevention coating as well as a preparation method and application thereof, and belongs to the technical field of biological adhesion prevention coatings. The technical problem that the service life and the effect of an existing anti-biological-adhesion coating cannot be effectively guaranteed is solved. The coating comprises a bottom treatment agent and a composite resin coating, the bottom treating agent comprises epoxy film-forming resin, an active monomer, an initiator, an epoxy curing agent, an organic solvent, a flatting agent, a defoaming agent and a thickening agent; the composite resin coating comprises non-epoxy film-forming resin, epoxy film-forming resin, an active monomer, an initiator, an epoxy curing agent, an organic solvent, a dispersing agent, a flatting agent, a defoaming agent, a thickening agent, conductive filler and zinc oxide. The coating is good in construction performance, high in construction flexibility and suitable for various application scenes, and can also serve as a coating repairing material to conduct on-site repairing on a local anti-biological-adhesion coating, and the prepared coating is good in anti-microbial adhesion, good in corrosion resistance, high in adhesive force and good in barrier property and weather resistance.

The present application belongs to the technical field of functional composite coating materials, and particularly relates to an epoxy resin-based nano-composite protective coating material, a preparation method and application thereof. The method uses natural attapulgite and copper chloride dihydrate as raw materials, and adopts chemical bath deposition and hydrothermal method to load polydopamine-copper and defect-rich cerium oxide into attapulgite respectively, to obtain a defect-rich cerium oxide / polydopamine-copper / attapulgite nano-composite material. Then, the material is mixed with epoxy resin E51 and diluent to obtain an epoxy resin-based protective coating material with both corrosion and algae resistance and photo-thermal deicing functions. The coating material has long-term and complex environment-resistant corrosion resistance, and also has excellent high and low temperature salt spray complex environment aging resistance and anti-microbial adhesion performance, and is suitable for high-voltage transmission and distribution tower, oil field ground equipment metal structure corrosion protection in high-cold regions and humid environments.

The invention discloses a multi-dimensional quantitative detection method for microbial corrosion resistance of Cr-containing steel. The method comprises the following steps: a microbial challenge test: inoculating sulfate reducing bacteria into a culture medium, and exposing a sample in a microbial environment; performing quantitative analysis on corrosion products: performing ultrasonic rust removal on the sample by using an acid pickling solution, then calculating a weightlessness corrosion rate, and quantifying the adhesion amount of microorganisms on the surface of the sample; multi-mode electrochemical testing: monitoring the open-circuit potential and linear polarization resistance of the sample, and performing electrochemical impedance spectroscopy and potentiodynamic polarization curve testing to obtain corrosion current density and polarization resistance; surface analysis: analyzing the corrosion morphology and element distribution of the sample through a scanning electron microscope and an energy disperse spectroscopy, and determining the chemical state of the chromium element by adopting X-ray photoelectron spectroscopy to obtain the stability and the sulfur content of a passive film; and evaluating the corrosion degree: establishing a coupling model of the corrosion current density, the polarization resistance, the passivation film stability, the microorganism adhesion amount and the sulfur content, and calculating the corrosion degree.

The application provides a composite membrane combining polytetrafluoroethylene (PTFE) nanoparticles and zirconium oxide (ZrO2) nanocrystals, the surface energy of the composite membrane is effectively reduced, thereby reducing the microbial adhesion in the fermentation broth. The ZrO2 nanocrystals can form small pores, reducing protein plugging and adsorption, and further relieving membrane pollution in the fermentation broth. This double defense mechanism significantly improves the stable flux of the composite membrane in the ethanol fermentation broth, and widens the application prospect of the composite membrane in fermentation broth clarification and biological product recovery.

The application discloses a water quality impurity-removing water-saving purification device for hydraulic engineering and relates to the field of hydraulic engineering, which comprises a barrel body and an upper cover body. A filler box, a funnel and a purification box are sequentially arranged in the barrel body from top to bottom. The top and bottom of the funnel are respectively connected with the bottom of the filler box and the top of the purification box. Three horizontal plates for microbial adhesion are arranged in the purification box. The three horizontal plates are fixedly connected through connecting rods. A movement assembly is arranged above the horizontal plates in the purification box. The movement assembly is used for controlling the vertical reciprocating movement of the three horizontal plates, expanding the contact area between the microorganisms and the water body. A disturbance assembly is arranged in the filler box and the funnel. The disturbance assembly is used for moving along with the movement of the movement assembly, dispersing the filler gathered in the filler cavity and avoiding caking. The application can expand the contact area between the microorganisms and the water body, make the microorganisms sufficiently decompose the high-molecular organic matters in the water, and disperse the filler, thereby avoiding the caking phenomenon.

The application discloses an electrospun composite membrane for slow release of bacterial population response signal molecules and a preparation method and application thereof, and belongs to the field of sewage biological treatment. The application provides an electrospun composite membrane for slow release of bacterial population response signal molecules and a preparation method and application thereof. The composite membrane comprises a base membrane obtained by electrospinning and a functional layer, the functional layer is a fiber with a core-shell structure, the shell layer is a polymer, the core layer is a polymer containing bacterial population response signal molecule material, the base membrane is obtained by uniaxial electrospinning technology, and the functional layer is obtained by uniaxial emulsion electrospinning or coaxial electrospinning technology. The obtained composite membrane has good air permeability, high oxygen transfer rate, large specific surface area and high roughness, which provides favorable conditions for microbial adhesion, and when the composite membrane is used for assembling a flat membrane module and applied to an MABR process, an excellent ammonia nitrogen removal rate can be obtained.

The invention discloses deep-sea self-adaptive ultra-high performance concrete and a preparation method thereof, and the deep-sea self-adaptive ultra-high performance concrete comprises the following components in parts by weight: 50-60 parts of a base material, 10-20 parts of a reinforcing material, 10-20 parts of a functional material and 10-20 parts of a special additive. 5-10 parts of a reinforcing material; 0-5 parts of a functional material; the matrix material is prepared from the following components in parts by weight: 30-40 parts of anti-erosion cement, 30-40 parts of nano silica fume and 30-40 parts of fused quartz powder; 5 to 15 parts of nano silica fume; and 10-20 parts of fused quartz powder. The deep-sea self-adaptive ultra-high-performance concrete prepared by the invention has ultrahigh compression resistance and durability, has a concrete material crack self-repairing capability in a deep-sea environment, can effectively improve the corrosion capability of seawater in a deep-sea low-temperature environment, has obviously improved strength, corrosion resistance, microbial adhesion resistance and wear resistance, has improved durability, and is suitable for large-scale production. And the cable is long in service life and can be used in ocean engineering construction.

The invention provides a constructed wetland filter material and a preparation method thereof, and particularly relates to the technical field of water environment treatment. The constructed wetland filter material comprises an inorganic matrix and a modified PLA coating positioned on the surface of the inorganic matrix, the modified PLA is hydrophilic modified PLA; and the thickness of the modified PLA coating is less than 2mm. The constructed wetland filter material provided by the invention has significantly improved hydrophilicity, and the surface biofilm density is increased by 30% or more, so that the microbial adhesion ability is greatly improved. In the aspect of denitrification performance, the nitrate removal rate of the filter material is increased by 20-40%. Even under the low-temperature condition of 5-15 DEG C, the removal rate of nitrate can still be stably kept at 60% or above, and is remarkably superior to that of a traditional filter material. In addition, the filter material also has excellent mechanical properties, the compressive strength is improved by 30% or more, and the wear resistance and the anti-scouring capability are also remarkably enhanced, so that the filter material shows higher stability and durability in a complex environment and long-term operation.

The invention relates to the technical field of pipeline surface treatment, in particular to an antimicrobial adhesion surface treatment process for a PP-RCT marine pipeline, which comprises the following steps: pipeline pretreatment: sequentially performing deionized water flushing, drying, alkali washing, neutral flushing and secondary drying on the PP-RCT marine pipeline; plasma treatment: placing the pretreated pipeline in plasma treatment equipment, vacuumizing, introducing argon, and carrying out plasma treatment under specific power and time; antibacterial agent loading is conducted, specifically, the pipeline subjected to plasma treatment is soaked in an antibacterial agent solution containing nano-silver particles, chitosan and polyethylene glycol-polycaprolactone segmented copolymer, and antibacterial agent loading is completed after adsorption, washing and drying are conducted; and surface graft polymerization: putting the pipeline loaded with the antibacterial agent into a graft monomer solution containing dimethylaminoethyl methacrylate, acrylic acid and an initiator, carrying out graft polymerization reaction by adopting a step-by-step heating mode under the protection of nitrogen, and washing and drying to finish the treatment.

To provide a cross-linked resin with excellent biodegradability and microbial adhesion properties. [Solution] A crosslinked resin which is a reaction product of a compound (A) having an active hydrogen group and being biodegradable and a compound (B) having an α,β-unsaturated carbonyl functional group and being biodegradable.

The invention discloses a pollution-free preservation method for a blood test sample, and belongs to the technical field of medical examination. The method specifically comprises the following steps: S1, collection and initial treatment of a sample: collecting a blood test sample, and carrying out primary treatment on the collected blood test sample; s2, treatment of the storage container: performing anti-pollution treatment on the storage container of the blood test sample, and dynamically monitoring the storage environment of the storage container. The inner wall of the sterile blood collection tube is coated with polytetrafluoroethylene, heparin sodium and EDTA composite anticoagulant are used, blood coagulation and microbial adhesion can be prevented, meanwhile, the hemolysis risk is reduced, and leakage can be avoided in the transportation process by adopting vacuum aluminum film sealing after rubber plug sealing. Silver nanoparticles and a zinc oxide coating are sprayed on the inner wall of the storage container, microorganism proliferation can be inhibited, the upper layer in the storage container is filled with a nitrogen layer to isolate oxygen, a lower-layer sample area maintains low positive pressure to prevent leakage, and the local temperature gradient can be effectively eliminated through distributed cooling storage.

The adhesive is added into the composite autotrophic denitrification filler, so that the composite autotrophic denitrification filler has certain strength, the flexibility of the filler is improved, the impact resistance of the filler is improved, the operation cycle of the filler is prolonged, and the cost is saved. The foaming agent can form dense bubbles under stirring and is matched with sodium methyl silicate for use, so that the stability and durability of the bubbles are improved; furthermore, a porous structure can be generated in the forming process of the composite autotrophic denitrification filler, and the specific gravity is reduced; meanwhile, the specific surface area can be increased and the microorganism adhesion capability is improved. The composite autotrophic denitrification filler with limited specific gravity and a bottom-to-top water inlet mode can suspend in the fluidization reaction zone and make better contact with pollutants in water, and the removal effect is improved; the composite autotrophic denitrification filler is suspended in water, the condition of filler layer blockage is avoided, backwashing is not needed, and meanwhile, the situation that the filler is discharged out of the reactor along with sewage and silt, and consequently the filler is wasted can be prevented.

The problem addressed by the present invention is to provide a method for starting an anaerobic processing tank that efficiently advances microbial adhesion to carrier surfaces and makes it possible to shorten the amount of time required to start an anaerobic processing tank.　In order to solve this problem, the present invention provides a method for starting an anaerobic processing tank, the method comprising a carrier coating step that includes: a flocculant loading step in which a flocculant is loaded into an anaerobic processing tank after the anaerobic processing tank has been filled with a carrier; and a sludge loading step in which sludge is loaded into the anaerobic processing tank after the flocculant loading step. The carrier coating step is performed multiple times.　According to the present invention, a substance that contributes to microbial adhesion is loaded in a prescribed order and the foregoing is repeated a plurality of times, thereby making it possible to produce a state in which the sludge-coated carrier is accommodated in the entire interior of the anaerobic processing tank in a short amount of time. Namely, when starting the anaerobic processing tank, microbial adhesion to carrier surfaces is efficiently advanced such that the amount of time required to start the anaerobic processing tank can be shortened.

The invention discloses a water conservancy project water quality impurity removal and water saving purification device, and relates to the field of water conservancy project, the water conservancy project water quality impurity removal and water saving purification device comprises a barrel body and an upper cover body, the barrel body is internally provided with a filler box, a funnel and a purification box in sequence from top to bottom, and the top and the bottom of the funnel are communicated with the bottom of the filler box and the top of the purification box respectively; three stacked horizontal plates used for attachment of microorganisms are arranged in the purification box, the three horizontal plates are fixedly connected through connecting rods, a moving assembly is arranged in the purification box and located above the horizontal plates, and the moving assembly is used for controlling the three horizontal plates to do vertical reciprocating motion, so that the contact area of the microorganisms and a water body is enlarged, and the water body is purified. Disturbance assemblies are arranged in the filler box and the funnel, the disturbance assemblies are used for moving along with the movement of the movement assembly and scattering the filler gathered in the filler cavity to avoid caking, the contact area between microorganisms and the water body can be enlarged, the microorganisms and the water body can fully decompose high-molecular organic matter in water, the filler can be scattered, and the water quality is improved. The caking phenomenon is avoided.

This invention discloses a biofilm carrier suitable for low-temperature wastewater treatment, its preparation method, and its application. The biofilm carrier uses SiC ceramic as the biofilm framework. A photothermal agent is coated on the upper part of the SiC ceramic to form a photothermal conversion functional zone, while the lower part of the SiC ceramic is a microbial adhesion functional zone. Simultaneously, temperature-responsive nanocapsules are loaded on the upper part of the SiC ceramic, enabling efficient photothermal conversion, adsorption and enrichment of functional bacteria, and increased biomass, thus achieving enhanced bacterial activity under low-temperature conditions. The preparation method of this biofilm carrier is simple, and its application in microbial wastewater treatment results in a high ammonia nitrogen removal rate.