filter paper Articles

  • 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

  • Bioactive paper

    Technology: Adding biomolecular functionalities to fibre-based products Features and benefits: Fibre structure with embedded sensors or indicators based on selective reactions of biomolecules, such as enzymes or antibodies. Cost-effective manufacturing through mass production methods, such as papermaking, -coating and printing. Applications and ...

  • 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

  • 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

  • A blind estimation of speed and rotor position of permanent magnet synchronous motor from the measurements of stator currents using extended Kalman filter

    A number of techniques have been developed for estimation of speed or rotor position in motor drives. In this paper, an extended Kalman filter (EKF) is developed for the estimation of speed and rotor position using only the measurements of three phase stator currents. Conventional mechanical sensors are not needed for this estimation. The paper proposes the modelling of the dynamic equations of ...


    By Inderscience Publishers

  • 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

  • Small Oil Filter Recycling Line

    Oil Filter Recycling Oil filters recycling line construction is more and more worthwhile as the regulations regarding the containment of scrap motor vehicles increasingly. Also plus the increasing global demand for nonferrous metals and a steady price increase. Small Oil Filter Recycling Line Oil filter recycling line’ s basic ...


    By Harden Machinery Ltd.

  • 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

  • A novel discrete multi-objective particle swarm optimisation (MOPSO) technique for optimal hybrid power filter compensator schemes

    This paper presents a novel algorithm for a discrete search optimisation and an approach to solve the problem of the hybrid power filter compensator with the design of C-type filter and fixed capacitor bank using discrete multi-objective particle swarm optimisation (MOPSO) method. This novel optimisation approach, a multi-objective particle swarm optimisation (MOPSO) method is implemented to ...


    By Inderscience Publishers

  • Warning message generation by information filtering techniques

    This paper proposes a two-stage model for generating warning messages by using information filtering techniques. In this model, information is represented by its attributes and processed through two stages. At the first stage, exceptions are separated from normal information by the cognitive filtering technique. At the second stage, a warning message is generated from critical exceptions by the ...


    By Inderscience Publishers

  • [Technical Paper] Biomass Evolution in Full-Scale Drinking Water Filters

    After nearly two-years of work, we could advance our understanding of ATP measurement in drinking water biofilters. I will describe some of the background and key results from the study below – more information is provided in the Journal AWWA December 2016 article. Background of the ...


    By LuminUltra Technologies Ltd.

  • Case study: Pulp & paper plant

    OverviewEuropaper produces tissues paper for Industrie Cartarie Tronchetti, which has its own branch (Foxy). Changes in the paper production were followed by an increase of the BOD load in the wastewater. Therefore the existing water treatment plant had to be upgraded. RequirementsAn increased BOD load in the wastewater, caused by a conversion of production, required an ...

  • ‘Sleeper’ Issue: Indoor Air Quality

    Thirty percent of commercial buildings in the United States have poor indoor air quality (IAQ), according to an ...


    By ProMark Associates, Inc.

  • Case study: Pulp & paper industry

    OverviewThe paper mill at Valdivia produces card board from chemical and mechanical pulp. With the installation of an additional paper machine, the wastewater flow increased from 4,000 m3/d to 8,500 m3/d and therefore an extension of the existing wastewater treatment plant was required. RequirementSo far, the existing effluent treatment plant consisted of a primary ...

  • New Particle Monitoring Strategies in UPW for 300 mm Fabs

    Abstract Process failures caused by particles in Ultra Pure Water (UPW) are relatively infrequent events, but with the move to 300 mm wafers and 90 nm line widths, they can have significant financial impact. Most particle monitoring strategies in the past focused on the use of the mobile and inline high sensitivity 0.05 micron particle counters. This paper examines the opportunities to ...


    By Particle Measuring Systems

  • Thermal Desorption-GC/MS Analysis of polycyclic aromatic hydrocarbons on fine particulates in air

    Polycyclic aromatic hydrocarbons (PAHs) are commonly found throughout the environment in soil, water and adsorbed to fine particulate matter in air. Of the 16 common PAHs, 7 have been classified as animal carcinogens by the International Agency for Research on Cancer (IARC). Resulting from this classification, PAHs are monitored and regulated in the environment. Analysis of PAHs in soil and water ...


    By PerkinElmer, Inc.

  • Hepa this Hepa that, is there such thing as a true Hepa vacuum?

    We all see it, the big Hepa sticker on the side so we automatically believe the vacuum must be a Hepa rated vacuum, right? - Sorry the chances are the Vacuum would never pass a Certified D.O.P test. Just because a vacuum has a Hepa filter doesn't make it a Hepa vacuum, many factors have to be taken into account such as: The Hepa Filter needs to be sized according to the airflow ...


    By Hypervac Technologies

  • Europaper, Italy A Case Study

    Case Study: Pulp & Paper PlantClient: Siemens Water Technologies – ItalyStart Up: August 2005Capacity: 2,000 m3/d Overview Europaper produces tissues paper for Industrie Cartarie Tronchetti, which has its own branch (Foxy). Changes in the paper production were followed by an increase of the BOD load in the wastewater. Therefore the existing water ...

  • Secondary Effluent Depth Filtration Medium Capacity

    ABSTRACTThe filter medium has a maximum accumulation capacity for the particulate material removed from the suspension that is being filtered. The maximum accumulation capacity (generally referred to as maximum specific deposit [MSD]) of the filter is basically an equilibrium condition, when the binding strength between the particles and the collecting medium (collecting medium can be the medium ...

  • 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

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