11 results about "Bacterial Filter" patented technology

The invention relates to a quick starting method of a biological filter bed based on fungus-bacterium coordinated regulation. The quick starting method adopts a two-step method and comprises the following steps: firstly, quickly starting a bacterium filter bed by taking benzyl alcohol as a carbon source; adjusting the pH value to 5.5-6.2, adding wheat bran, and implementing intermittent hypoxia stimulation (replacing antibiotics) until the absolute copy number ratio of fungi / bacteria is (F / B) gt; and the starting is finished when the temperature is 0.35. The whole process is free of antibiotics, the starting period is smaller than or equal to 14 days, the methylbenzene removal rate is larger than or equal to 95%, the mineralization rate is larger than or equal to 80%, and the method is remarkably superior to the prior art and suitable for large-air-volume and low-concentration hydrophobic VOCs treatment.

The utility model discloses a medical bacterial filter which comprises a shell, a filter layer is arranged in the shell, a dismounting opening is formed in one end of the shell, a dismounting frame is arranged in the dismounting opening, the filter layer is arranged in the dismounting frame, the dismounting frame is in sliding fit with the dismounting opening, a moving groove is formed in one end of the shell, and the moving groove is in sliding fit with the dismounting opening. A movable groove is formed in the shell, a positioning pin is arranged in the movable groove, a positioning groove is formed in the disassembly and assembly frame, the positioning pin is matched with the positioning groove, the number of the filter layers is two, the number of the disassembly and assembly frames and the number of the disassembly and assembly openings are also two correspondingly, the filter layers are located on the same side of the shell, a movable plate is arranged in the shell, and a control block is arranged on the movable plate. A sealing gasket is arranged on one side of the moving plate, a sliding opening is formed in the shell, and the sliding opening is matched with the control block, according to the equipment, the filtering structure is convenient to replace, the use of the equipment is not affected during replacement, and the use of the equipment is convenient.

The utility model discloses a bacterial filter and relates to the field of medical machinery, the bacterial filter comprises a filter box, an air inlet pipe, an air outlet pipe, a medicine inlet, a filter element and a connecting pipe, the air inlet pipe and the air outlet pipe are respectively arranged at the upper end and the lower end of the filter box, the medicine inlet is arranged on one side, close to the air inlet pipe, of the filter box, and the filter element is arranged in the filter box; a first connector and a second connector are arranged at the two ends of the connecting pipe respectively, a locking assembly is arranged on the first connector, the first connector is connected with the air outlet pipe through the locking assembly, and the second connector is connected with an equipment pipeline. The connecting pipe is utilized, when the length of the equipment pipeline is small, the locking assembly on the first connector is used for connecting the air outlet pipe and the connecting pipe, the second connector is used for connecting the connecting pipe of the equipment pipeline, and therefore the bacterial filter can be conveniently connected with the equipment pipeline.

The invention discloses a bacterial co-culture device capable of promoting culture medium flow, and belongs to the technical field of bacterial culture.The bacterial co-culture device capable of promoting culture medium flow comprises a supporting frame, and a circulating shaking assembly is slidably connected to the interior of the supporting frame and used for promoting gas exchange and increasing the solubility of oxygen in a culture medium; meanwhile, an adjustable waveform disturbance assembly is installed in the circulating shaking assembly and used for simulating the wave type wriggling movement of the intestinal tract, and therefore periodic pressure is applied to the bottom of the silica gel film. The circulating shaking assembly and the adjustable waveform disturbance assembly are adopted, fluid is pushed through overall deformation of a flexible membrane, mechanical shear damage to bacterial cells caused by stirring blades rotating at a high speed is completely avoided, meanwhile, directional flow generated by traveling waves ensures that a culture medium solution can effectively penetrate through a bacterial filtering membrane, and the bacterial filtering effect is improved. Continuous nutrition exchange and signal molecule transmission are provided for bacteria on the two sides of the membrane, and the problem that the transmission efficiency is low due to the fact that molecules only depend on diffusion is solved.

This invention discloses a bacterial filtration device for medical vacuum negative pressure units, relating to the field of medical supplies technology. It includes a support frame installed inside an ultraviolet disinfection hood, with movable frames slidably installed inside two filtration chambers. A primary filter element is installed at equal intervals inside the upper movable frame, and a secondary filter element is installed at equal intervals inside the lower movable frame. Two working modules are installed on the side of the support frame, each including a drive mechanism, a switching mechanism, and a clamping mechanism. The switching mechanism is driven by the movable frame and drives it to slide. The clamping mechanism drives a pressing component to press the connecting pipe, causing the connecting pipe to shift and connect the air passage. This bacterial filtration device for medical vacuum negative pressure units achieves single-drive linkage switching and clamping mechanism operation through the working modules, automatically switching filtration positions and sealing the air passage. Simultaneously, a trigger mechanism monitors filter element lifespan, supporting online filter replacement without shutting down the system.

The utility model discloses a special medical vacuum negative pressure unit structure for an infected building, which comprises a box body, a vacuum pump is mounted in the box body, an air inlet of the vacuum pump is fixedly communicated with an air inlet pipe, one end of the air inlet pipe is positioned outside the box body, a mounting plate is fixedly connected in the box body, a vacuum tank is fixedly connected onto the mounting plate, and the vacuum tank is fixedly connected onto the vacuum tank. A quick-clamping type flexible corrugated pipe is fixedly communicated between the vacuum tank and an air inlet of the vacuum pump, and an air outlet pipe is fixedly communicated with the vacuum tank. The vacuum negative pressure unit disclosed by the utility model is more integrated, smaller in occupied space, lighter in weight, low in cost, convenient to install and maintain, and capable of buffering sucked air, so that the bacterial filter and the disinfection box can be prevented from being damaged due to high-pressure impact, the operation stability of the vacuum negative pressure unit is effectively improved, and the service life of the vacuum negative pressure unit is prolonged. And the load of the bacteria filter and the disinfection box in unit time can be reduced, so that the purification effect of the medical vacuum negative pressure unit can be improved.

The present invention relates to an ultrafiltration membrane for removing viruses and bacteria, and a manufacturing method therefor, and, more specifically, to an ultrafiltration membrane for removing viruses and bacteria, comprising: (a) a porous polymer support membrane; and (b) a cross-linked and positively-charged coating layer formed on both the internal pores and the surface of the porous polymer support membrane. The ultrafiltration membrane has excellent disinfection and turbidity removal performance and can be applied as a viral and bacterial filter.

The invention relates to the technical field of DNA preservation, in particular to a compound preservation solution for normal-temperature preservation of wild protected animal excrement DNA and a preparation method of the compound preservation solution. The composite preserving fluid is prepared from polyethylene glycol PEG200, EDTA (Ethylene Diamine Tetraacetic Acid), TCEP-HCl, NaCl, Tris, glycerol and a bacteriostatic agent, the preparation method comprises the following steps: S1, adding a proper amount of ultrapure water into other components except the bacteriostatic agent and TCEP-HCl in the formula of the composite preservation solution, dissolving and mixing to obtain a first mixed solution; s2, performing high-pressure steam sterilization on the first mixed solution, and cooling at room temperature; s3, filtering and sterilizing a bacteriostatic agent and TCEP-HCl through a bacterial filter, adding the cooled first mixed solution, and mixing; s4, adjusting the pH value to 7.0-8.0 by using NaOH prepared from sterile ultrapure water, and fixing the volume by using the sterile ultrapure water; and S5, sub-packaging the composite preserving fluid with the constant volume into a sterile, enzyme-free and heat-source-free 50mL centrifugal tube, and preserving in a shade place in a dark place. The invention provides a reliable technical scheme for normal-temperature preservation and transportation of wild protected animal excrement DNA samples in field investigation.

The utility model discloses a device for culturing bacteriophages, and relates to the technical field of microorganism culture. The device comprises a container cover, a container, a sample inlet pipe and a sample outlet pipe, the container is in airtight connection with the sample inlet pipe and the sample outlet pipe respectively; the container cover is detachably connected with the opening of the container in an airtight manner; a through vent hole is formed in the container cover; the sample inlet pipe and the sample outlet pipe are respectively communicated with the inner side and the outer side of the container, and a sample inlet pipe port is higher than a sample outlet pipe port on the inner side of the container; an air filter membrane is arranged in the air vent, the sample inlet pipe is provided with a bacterial filter, and a sealing plug is detachably mounted at a port, outside the container, of the sample outlet pipe. By adopting the device, when the phage type is replaced, the experiment does not need to be terminated, and the culture can be continued by continually supplementing a fresh culture medium and phage suspension from the sample feeding pipe, so that the continuity of phage culture and screening is realized until the phage capable of splitting target bacteria is screened out.

In one aspect, the present disclosure provides a water purification system that includes a water inlet, a bacterial filter downstream of the water inlet, a fluid outlet downstream of the bacterial filter, and a source of a cleaning fluid in fluid communication with an inlet of the bacterial filter to provide the cleaning fluid upstream of the bacterial filter.

This utility model discloses a bacterial filtration structure for a medical vacuum negative pressure unit, relating to the field of medical vacuum negative pressure equipment technology. The utility model includes a base, with several lifting sleeves fixedly connected to the top outer wall of the base. Each of the lifting sleeves has a lifting groove on its inner wall. By incorporating convex shafts, the utility model allows for clockwise rotation of a handle, which in turn drives a worm gear, which in turn drives a worm wheel, which in turn drives a transmission rod. The transmission rod then drives one end of each of the convex shafts to rotate, which in turn drives one end of a connecting rod to move. This connecting rod then drives an extension rod to move upwards, which in turn raises a fixed base. The fixed base then drives several racks to rise, thus achieving a height that can be freely adjusted to accommodate varying heights in different environments and ventilation systems with different elevations, thereby improving the equipment's versatility.