THE INFLUENCE OF ACCUMULATED LIQUID ON FIBROUS FILTER PERFORMANCE

This study aimed to evaluate the deposition of NaCl nanoparticles during filtration in a cellulose filter medium (HEPA). The diameter of the generated polydisperse particles was between 6 and 800nm. Deposition was evaluated with the curves of pressure drop as a function of time. The permeability of the filter medium was determined and, after the deposition of particles, specific resistance of the formed cake was obtained. Filter performance was evaluated by counting particles before and after the filter medium and the pressure drop was monitored in order to obtain the filtration curve. Filtration velocity was kept at 0.06 m/s, and the concentration of the solution generated at a rate of 0.0042 L /min in a commercial inhaler was of 5 g/L. The results showed that this filter showed two steps during the deposition of particles, an internal filtration stage and a surface filtration stage. Although this filter is highly efficient in removing particles in the range evaluated, roughly 100%, particle penetration was observed in the range between 50 and 200nm.

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Biofouling reduction for improvement of depth water filtration. Filter production and testing

Chemical and Process Engineering ◽

10.1515/cpe-2016-0026 ◽

2016 ◽

Vol 37 (3) ◽

pp. 319-330 ◽

Cited By ~ 2

Author(s):

Ewa Sztuk - Sikorska ◽

Leon Gradon

Keyword(s):

Separation Efficiency ◽

Fiber Surface ◽

Full Scale ◽

Water Recovery ◽

Fibrous Filter ◽

Retention Capacity ◽

Purification Method ◽

Flowing Fluid ◽

Polypropylene Composites ◽

Filter Performance

AbstractWater is a strategic material. Recycling is an important component of balancing its use. Deep-bed filtration is an inexpensive purification method and seems to be very effective in spreading water recovery. Good filter designs, such as the fibrous filter, have high separation efficiency, low resistance for the up-flowing fluid and high retention capacity. However, one of the substantial problems of this process is the biofouling of the filter. Biofouling causes clogging and greatly reduces the life of the filter. Therefore, the melt-blown technique was used for the formation of novel antibacterial fibrous filters. Such filters are made of polypropylene composites with zinc oxide and silver nanoparticles on the fiber surface. These components act as inhibitors of bacterial growth in the filter and were tested in laboratory and full scale experiments. Antibacterial/bacteriostatic tests were performed on Petri dishes with E. coli and B. subtilis. Full scale experiments were performed on natural river water, which contained abiotic particles and mutualistic bacteria. The filter performance at industrial scale conditions was measured using a particle counter, a flow cytometer and a confocal microscope. The results of the experiments indicate a significant improvement of the composite filter performance compared to the regular fibrous filter. The differences were mostly due to a reduction in the biofouling effect.

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Synchronous Reference Scheme for Improving the Active Power Filter Performance by using Fuzzy Controller

i-manager s Journal on Circuits and Systems ◽

10.26634/jcir.2.1.2784 ◽

2014 ◽

Vol 2 (1) ◽

pp. 15-21

Author(s):

Appikonda Mohan ◽

◽

Naveen Bolisetti ◽

Chiranjeevi Tirumalasetty ◽

Mothiram Bhukya ◽

...

Keyword(s):

Fuzzy Controller ◽

Active Power Filter ◽

Active Power ◽

Filter Performance ◽

Power Filter ◽

Reference Scheme

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Evaluation of Mott Filter Performance: Solids Removal Efficiency

10.2172/801016 ◽

2002 ◽

Author(s):

M R Poirier

Keyword(s):

Removal Efficiency ◽

Filter Performance ◽

Solids Removal

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EMI Filter Performance of Transformerless Topology for Photovoltaic Applications

2020 International Symposium on Electromagnetic Compatibility - EMC EUROPE ◽

10.1109/emceurope48519.2020.9245763 ◽

2020 ◽

Author(s):

Duc-Thanh Do ◽

Holger Hirsch

Keyword(s):

Filter Performance ◽

Photovoltaic Applications ◽

Emi Filter

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The core microbiome is responsible for volatile silicon and organic compounds degradation during anoxic lab scale biotrickling filter performance

The Science of The Total Environment ◽

10.1016/j.scitotenv.2021.149162 ◽

2021 ◽

pp. 149162

Author(s):

Ellana Boada ◽

Eric Santos-Clotas ◽

Alba Cabrera-Codony ◽

Maria J. Martín ◽

Lluís Bañeras ◽

...

Keyword(s):

Organic Compounds ◽

Biotrickling Filter ◽

Core Microbiome ◽

Filter Performance ◽

The Core

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Wideband Reconfigurable Integrated Low-Pass Filter for 5G Compatible Software Defined Radio Solutions

Electronics ◽

10.3390/electronics10060734 ◽

2021 ◽

Vol 10 (6) ◽

pp. 734

Author(s):

Karolis Kiela ◽

Marijan Jurgo ◽

Vytautas Macaitis ◽

Romualdas Navickas

Keyword(s):

Software Defined Radio ◽

Dynamic Range ◽

Noise Figure ◽

Harmonic Distortion ◽

Cmos Process ◽

Pass Filter ◽

Low Pass Filter ◽

Filter Performance ◽

Low Pass ◽

Bandwidth Tuning

This article presents a wideband reconfigurable integrated low-pass filter (LPF) for 5G NR compatible software-defined radio (SDR) solutions. The filter uses Active-RC topology to achieve high linearity performance. Its bandwidth can be tuned from 2.5 MHz to 200 MHz, which corresponds to a tuning ratio of 92.8. The order of the filter can be changed between the 2nd, 4th, or 6th order; it has built-in process, voltage, and temperature (PVT) compensation with a tuning range of ±42%; and power management features for optimization of the filter performance across its entire range of bandwidth tuning. Across its entire order, bandwidth, and power configuration range, the filter achieves in-band input-referred third-order intercept point (IIP3) between 32.7 dBm and 45.8 dBm, spurious free dynamic range (SFDR) between 63.6 dB and 79.5 dB, 1 dB compression point (P1dB) between 9.9 dBm and 14.1 dBm, total harmonic distortion (THD) between −85.6 dB and −64.5 dB, noise figure (NF) between 25.9 dB and 31.8 dB and power dissipation between 1.19 mW and 73.4 mW. The LPF was designed and verified using 65 nm CMOS process; it occupies a 0.429 mm2 area of silicon and uses a 1.2 V supply.

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