Lab Filtration Articles

  • Focus On Microfiltration Part 1: Filter Longevity

    For consumers using disk, syringe, and capsule filters it is a common FAQ: How long will my filter last? Or, to put it another way: How much fluid can I expect to pass through my filter before it clogs? This seems to be a simple and reasonable question for a filter consumer: Would any of us purchase a product without an understanding ...


    By Sterlitech Corporation

  • Comprehensive optimisation and practical design of LCL filter for shunt active power filter

    Shunt Active Power Filter (SAPF) can be applied to compensate for existing source-type current harmonics. However, high-precision compensation is difficult because harmonic current has a large variation and the current loop has a steady-state error. A design method for a new practical LCL filter based on SAPF is proposed in this paper. A harmonic model of the LCL filter is built based on SAPF ...


    By Inderscience Publishers

  • Artificial neural network–based harmonics extraction algorithm for shunt active power filter control

    This paper presents a harmonics extraction algorithm using artificial neural network methods. The neural network algorithm was used due to the simpler calculation process compared with conventional method such as fast Fourier transform (FFT). Two types of neural network, i.e., multi–layer perceptron (MLP) and radial basis function (RBF) were employed to extract harmonics current component from ...


    By Inderscience Publishers

  • An efficient current regulator for a power conditioner operated by an innovative strategy

    This paper presents an innovative implementation of the recursive Gauss-Newton (GN) algorithm for extraction of the common current quality problems such as the current harmonics and current fluctuation. This paper introduces also the utilisation of the adaptive notch filters to efficiently track the unknown frequencies of the current disturbances. The paper exhibits the mitigation results for ...


    By Inderscience Publishers

  • Selection of bioassay method influences detection of annual bluegrass resistance to mitotic-inhibiting herbicides

    Dinitroaniline-resistant annual bluegrass (Poa annua L.) has been reported in several states; however, there are no standardized screening methods for detecting resistance. Research was conducted to evaluate screening techniques (Murashige and Skoog [MS] media, filter paper, hydroponics, and soil based) to detect herbicide resistance to dithiopyr, prodiamine, and pendimethalin in a suspected ...

  • Fruit Cannery

    This facility cans peaches and pears and wanted to investigate the reduction in BOD and TSS using the Floccin Agents. Samples were made in the off season using 2/3 by weight of peach to 1/3 pear with a total amount of 100 grams in 2,000 ml (5% by weight to simulate the wastewater generated from the facility). The samples were flocculated with Floccin J at a dosage of 0.25 gram/1,000 ml (250 ...


    By Integrated Engineers Inc.

  • A new transformerless series hybrid active power filter (TL-SHAPF) topology

    This paper presents a new transformerless series hybrid active power filter topology (TL-SHAPF). The active filter is in series with a capacitor. This combination is in parallel with an inductor and the entire arrangement is inserted in series with the line without the transformer. In this topology, current division method is employed along with series and parallel resonance concepts. The source ...


    By Inderscience Publishers

  • A novel shunt active filter algorithm: simulation and analog circuit-based implementation

    Active power filters are widely accepted and implemented as a reliable means for solving power quality problems and supplying clean power to the end user. In this paper, a novel three-phase shunt active filtering algorithm is proposed and simulated. The control algorithm is implemented in hardware using simple analog circuits using only a few operational amplifiers. The simulation results and the ...


    By Inderscience Publishers

  • Laboratory Filter Paper Suction Measurements

    Results of filter paper measurements for both matric and total suction values are reported for a sand, silt, and clay. Calibration curves for the matric and total suction are given for the filter paper used in this study, and comparisons with the results of several other researchers are made. For low suction values, the matric suction is more easily measured than the total suction using the ...


    By ASTM International

  • Use of Side Drains in Triaxial Testing at Moderate to High Pressures

    Side drains are used in triaxial tests to increase the rate of consolidation and equalize pore water pressures within the specimen. However, the efficiency of the side drains has been shown to be a function of time and effective confining pressure.This paper presents the results of (1) a mail survey on side drain practice, which indicates that many laboratories use side drains not recommended by ...


    By ASTM International

  • A New Filter Material for Measuring Soil Suction

    The filter paper method for determining soil suction has been in use for many years and owes its attraction to its simplicity. A major drawback of the method is that the suction range over which it can be applied is limited by the moisture sensitivity of the filter paper or absorbent used. By convention, filter paper has been adopted for use in the method, but other absorbents may well be more ...


    By ASTM International

  • Suction-Moisture Content Calibration of Filter Papers from Different Boxes

    The filter paper method is probably the simplest of the methods available for estimating the suction of a clay soil. The method measures soil suction indirectly by simply measuring the moisture content of a filter paper having been brought to the same suction as the soil. Calibration of representative specimens of the filter paper over a range of known suctions defines the suction-moisture ...


    By ASTM International

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