115 resources related to Microfiltration
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The conference program will consist of plenary lectures, symposia, workshops and invitedsessions of the latest significant findings and developments in all the major fields of biomedical engineering.Submitted papers will be peer reviewed. Accepted high quality papers will be presented in oral and postersessions, will appear in the Conference Proceedings and will be indexed in PubMed/MEDLINE
2020 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS)
One of the flagship conferences for the IEEE Robotics and Automation Society (RAS)
IEEE/SICE SII is the premier symposium series presenting the state of the art and future perspectives of System integration, where industry experts, researchers, and academics share ideas and experiences surrounding frontier technologies, breakthrough and innovative solutions and applications.2020 IEEE/SICE International Symposium on System Integrations (SII 2020) will be as the 12th symposium on system integration. System integration is one of the key technologies and the integration of hardware and software is especially important to solve the industrial or social system problems in new century. This symposium focuses to the new research and industrial application of system integration, and discusses the approach method to improve effectiveness of system integration.
The world's premiere conference in MEMS sensors, actuators and integrated micro and nano systems welcomes you to attend this four-day event showcasing major technological, scientific and commercial breakthroughs in mechanical, optical, chemical and biological devices and systems using micro and nanotechnology.The major areas of activity in the development of Transducers solicited and expected at this conference include but are not limited to: Bio, Medical, Chemical, and Micro Total Analysis Systems Fabrication and Packaging Mechanical and Physical Sensors Materials and Characterization Design, Simulation and Theory Actuators Optical MEMS RF MEMS Nanotechnology Energy and Power
The conference covers all aspects of the technology associated with ultrasound generation and detection and their applications.
The IEEE Transactions on Advanced Packaging has its focus on the modeling, design, and analysis of advanced electronic, photonic, sensors, and MEMS packaging.
The Transactions on Biomedical Circuits and Systems addresses areas at the crossroads of Circuits and Systems and Life Sciences. The main emphasis is on microelectronic issues in a wide range of applications found in life sciences, physical sciences and engineering. The primary goal of the journal is to bridge the unique scientific and technical activities of the Circuits and Systems ...
The design and manufacture of consumer electronics products, components, and related activities, particularly those used for entertainment, leisure, and educational purposes
The development and application of electric systems, apparatus, devices, and controls to the processes and equipment of industry and commerce; the promotion of safe, reliable, and economic installations; the encouragement of energy conservation; the creation of voluntary engineering standards and recommended practices.
A journal covering Microsensing, Microactuation, Micromechanics, Microdynamics, and Microelectromechanical Systems (MEMS). Contains articles on devices with dimensions that typically range from macrometers to millimeters, microfabrication techniques, microphenomena; microbearings, and microsystems; theoretical, computational, modeling and control results; new materials and designs; tribology; microtelemanipulation; and applications to biomedical engineering, optics, fluidics, etc. The Journal is jointly sponsored by the IEEE Electron Devices ...
2011 Second International Conference on Mechanic Automation and Control Engineering, 2011
The critical flux was determined by flux-step method in this paper. Under different permeate flows and multiple cycle filtration, the regulation of united membrane fouling index (UMFI) and irreversible fouling UMFI (UMFI<sub>ir</sub>) was studied. Both removal efficiency of dissolved organic matter (DOM) and UMFI accompanying with permeate flow were also discussed. The results showed that gradual fouling still existed under ...
Digest of Papers Microprocesses and Nanotechnology 2005, 2005
This paper presents the fabrication of all plastic microfluidic devices with built-in 3-D fine microstructures. The built-in micromeshes in the microchannel were formed by the combination of the multi-angle inclined backside exposure and top side exposure of thick Epon SU-8 photoresist on a glass substrate. The lift off method, using LOR (Lift-off Resist) as a sacrificial layer, was utilized to ...
Proceedings of ISSE'95 - International Symposium on Signals, Systems and Electronics, 1995
The MSLMS (microstatic LMS) filter is a new kind of nonlinear filter, which stems from the filter based on the threshold decomposition approach. In this paper, the MSLMS filter is studied from another point of view, i.e. that of the piecewise-linear (PWL) filtering theory. From this study it is seen that the MSLMS filter belongs to a subset of known ...
Technical Digest. MEMS 2001. 14th IEEE International Conference on Micro Electro Mechanical Systems (Cat. No.01CH37090), 2001
This paper reports the design, fabrication, and testing of a new MEMS microfilter developed from a flexural plate wave (FPW) device in which acoustic forces generated within the filter membrane act to free particles and sweep them away from clogged pores. MEMS devices have already been shown to be effective for absolute filtration, but clogging has made them impractical for ...
Technical Digest. MEMS 2002 IEEE International Conference. Fifteenth IEEE International Conference on Micro Electro Mechanical Systems (Cat. No.02CH37266), 2002
A new DNA sample preparation microfluidic chip for Nucleic Acid (NA) probe assay has been proposed. The proposed microfluidic chip is composed of three parts: microfilter, micromixer and DNA purification chip. We have fabricated a microsieve type filter with an array of 2.2 /spl mu/m diameter holes. We have also demonstrated the mixing can be successfully achieved for low Reynolds ...
The critical flux was determined by flux-step method in this paper. Under different permeate flows and multiple cycle filtration, the regulation of united membrane fouling index (UMFI) and irreversible fouling UMFI (UMFI<sub>ir</sub>) was studied. Both removal efficiency of dissolved organic matter (DOM) and UMFI accompanying with permeate flow were also discussed. The results showed that gradual fouling still existed under operation of sub- critical condition owing to the existence of local supra-critical flux. Besides, the tendency of UMFI increased gradually attributing to the outer and inner pore adsorption/clogging as well as cake layer formation; on the contrary, UMFI<sub>ir</sub> decreased gently. The removal of DOM was improved with flux increasing because of cake layer being further compressed and becoming denser. The relationship between DOM transmission and UMFI was inverse ratio.
This paper presents the fabrication of all plastic microfluidic devices with built-in 3-D fine microstructures. The built-in micromeshes in the microchannel were formed by the combination of the multi-angle inclined backside exposure and top side exposure of thick Epon SU-8 photoresist on a glass substrate. The lift off method, using LOR (Lift-off Resist) as a sacrificial layer, was utilized to remove the all SU-8 device from the substrate. The monolithic plastic structures realize uniform physical and chemical properties required in microfluidic devices for practical applications. Fragmentation of a water droplet in organic carrier formed by two phase flow was demonstrated.
The MSLMS (microstatic LMS) filter is a new kind of nonlinear filter, which stems from the filter based on the threshold decomposition approach. In this paper, the MSLMS filter is studied from another point of view, i.e. that of the piecewise-linear (PWL) filtering theory. From this study it is seen that the MSLMS filter belongs to a subset of known PWL filters. It is theoretically investigated that the use of the MSLMS filter is limited since the subset it belongs to has a drawback in approximating a desired filtering operator. This drawback is overcome by another PWL filter, e.g. the so-called CPWL filter, which may be taken as a generalization of the MSLMS filter. An example of our simulations is presented, which verify the study.
This paper reports the design, fabrication, and testing of a new MEMS microfilter developed from a flexural plate wave (FPW) device in which acoustic forces generated within the filter membrane act to free particles and sweep them away from clogged pores. MEMS devices have already been shown to be effective for absolute filtration, but clogging has made them impractical for most applications. Also previously shown was the ability of flexural plate wave (FPW) devices to move particles in a pumped liquid. Recognizing the FPW pumping as a self-cleaning mechanism for microfilters presents exciting possibilities for reduced filter fouling, allowing larger volumes of fluid to be filtered and extending filter lifetime. Both the filtered fluid and the collected large particles could be the useful output. Acoustic particle manipulation has now been shown to free 2 and 10 /spl mu/m diameter spheres and sweep them away from once-blocked pores in both 4 /spl mu/m and 8 /spl mu/m filters. Experiments were performed with deionized (DI) water and polystyrene spheres.
A new DNA sample preparation microfluidic chip for Nucleic Acid (NA) probe assay has been proposed. The proposed microfluidic chip is composed of three parts: microfilter, micromixer and DNA purification chip. We have fabricated a microsieve type filter with an array of 2.2 /spl mu/m diameter holes. We have also demonstrated the mixing can be successfully achieved for low Reynolds number below 50 by using the fabricated micromixer. The fabricated DNA purification chip has shown a binding capacity of 15 ng/cm/sup 2/ and a minimum extractable input concentration of 100 copies/200 /spl mu/L. The proposed microfluidic chip can be applied for low-cost, disposable sample preparation of NA probe assays.
Coagulation-microfiltration process was used to treat the wastewater containing silver from silver powder factories. Adopting sodium hydroxide as coagulants, four stages tests were conducted. The membrane fouling in coagulation- microfiltration treatment wastewater containing silver was researched. The effect factors of the membrane fouling, such as the volume of the effluent, the mixed liquor suspended solid concentration (MLSS), shearing force on the membrane surface, operational mode and so on, were analyzed. The test results shown that as the MLSS closed to critical mixed liquor suspended solid concentration (CMLSS), the membrane fouling resistance Rp increased rapidly; enhancing the aeration on the membrane and using intermittent operation could increase CMLSS value, and could improve the efficiency of membrane reactor.
The dynamic membrane formation mechanisms and filtration mechanisms were investigated at 4 cm and 8 cm water head drop (WHD). Flux variation, resistance plot curve shape, the relationship t/V - t and t/V - V were investigated to study the dynamic membrane formation and filtration. And effluent turbidity and particles size distribution were also used to demonstrate the effluent particles size. Based on the flux stability, the dynamic membrane formation time is 120 min and 70 min for 4 cm and 8 cm WHD respectively. According to the forces analysis of a streaming particle, the reason was given about less time is needed for the dynamic membrane formation at higher WHD. Through the analysis of the resistance curve plot and the relationship of t/V - t and t/V - V, the dynamic membrane firstly is formed by cake growth, then small particles were captured by the formed cake, in this stage internal fouling is the dominant mechanism. After the dynamic membrane formation, screening becomes leading operation for particles removal including lager particles and small particles. Turbidity was used to illuminate the suspended solids in the effluent. Effluent turbidity shows that the membrane module occupies the good ability for particles removal before the dynamic membrane formation. Particles size distribution indicates that particles removal ability was formed gradually.
This paper presents a novel fabrication method of in-channel three-dimensional micromesh structures using the conventional photolithography. The micromesh was realized by exposing UV light from the backside of the SU-8 coated metal- patterned glass substrate for different angles. Numbers of exposure and irradiation angle decided the shape and the size of micromesh. Based on this technique, three different micromesh-inserted microchannel structures were fabricated. For hydrodynamic characterization, their flow resistances were measured. Finally, for the application of micro total analysis system (/spl mu/TAS), the microfilter was fabricated and its filtering property was demonstrated.
Soluble microbial products (SMP) would accumulate in membrane bioreactor (MBR) and result in membrane fouling due to the membrane rejection. A new hybrid membrane bioreactor with porous suspended carriers (HMBR) explored by author was effective in controlling membrane fouling. The behaviors of SMP in HMBR were investigated in such aspects as concentration variation with operation time, molecular weight distributions (MWDs), hydrophobicity, specific cake resistance of supernatant. UV254 absorbance indicated that SMP in HMBR increased with operation time. The MWDs experiments revealed that the distribution of SMP showed a double peaks curve, the two peaks appeared in high-molecular weigh (>;100 kDa) and lowmolecular weigh (<; 2kDa), and the latter was far higher than the former. However, the former had an increasing tendency with operation time. The hydrophobicity of SMP in HMBR and MBR gradually increased with time, and the former had a higher increasing rate. The dead-end filtration tests were used to indicate the SMP effect on membrane fouling and the specific cake resistance of supernatant in HMBR and MBR were determined. The results showed that the specific cake resistance of supernatant had a large increasing tendency.
With the use of silicon micromachining, an inorganic membrane sieve for microfiltration has been constructed having a silicon nitride membrane layer with thickness typically 1 /spl mu/m and perforations typically between 0.5 /spl mu/m and 10 /spl mu/m in diameter. As a support a <100>-silicon wafer with openings of 1000 /spl mu/m in diameter has been used. The thin silicon nitride layer is deposited on an initially dense support by means of a suitable chemical vapor deposition method (LPCVD). Perforations in the membrane layer are obtained with use of standard photo lithography and reactive ion etching (RIE). The deflection and maximum load of the membrane sieves are calculated in a first approximation. Experiments to measure the maximum load of silicon-rich silicon nitride membranes have confirmed this approximation.
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