laboratory filtration Articles

  • The productive environmental laboratory: BSK Labs boosts efficiency with Metrohm IC

    BSK Labs runs a number of environmental laboratories and service centers along the west coast of the US. A total of 70 employees – including microbiologists, chemists, lab technicians, and support staff – make sure that the 200 to 350 samples that come in every week are analyzed. BSK Labs specializes in potable water chemistry, ground water monitoring, storm water runoff, solid waste ...


    By Metrohm AG

  • Membranes, the Finest Filtration

    Introduction The notion that salt could be removed from seawater without a phase change took hold of Dr. Sourirajan's imagination in the late 1950's. The actual invention of the reverse osmosis (RO) membrane took place in his laboratory at UCLA around 1960. (Thus Sourirajan could be called not only the 'Father of Reverse Osmosis,' but the initiator of all crossflow membrane technology.) The full ...


  • Edible oil filtration - case study

    YEAR: 2010 COUNTRY: THE NETHERLANDS N° and MACHINERY MODEL EMPLOYED : 1  AUTOMAT 800.2600 and 1 AUTOMAT 630.2000 Diemme® Filtration The customer refines mostly vegetable oil for the food industry. The oil is mainly from sunflower seeds, peanuts, palm and fish. The customer already owned old manual filter presses ...

  • Home water treatment by direct filtration with natural coagulant

    ABSTRACTSeeds of the plant species Strychnos potatorum and Moringa oleifera contain natural polyelectrolytes which can be used as coagulants to clarify turbid waters. In laboratory tests, direct filtration of a turbid surface water (turbidity 15-25 NTU, heterotrophic bacteria 280-500 cfu ml−1, and fecal coliforms 280-500 MPN 100 ml−1), with seeds of S. potatorum ...


    By IWA Publishing

  • Membrane filtration and sonication for industrial wastewater reuse

    This paper presents an experimental study aimed at estimating the efficiency of the innovative process of ultrafiltration (UF) combined with sonication (Son.) for the refinement of treated effluent to be reused in wet textile processes. Such a novel approach, which has not yet been employed on a full industrial scale, has been experienced at pilot scale on the secondary effluent of the ...


    By IWA Publishing

  • POE sediment filtration — your first line of defense

    Around the country, our aging water delivery infrastructure is coated with sediment and scale from a century or more of buildup. Those same tuberculated pipes are constantly challenged by daily tie-ins, repairs, flow tests and fire hydrant use in most cities and towns. The result is that drinking water that left the municipal treatment plant at top quality arrives in users’ glasses — or in their ...

  • City Water International explains The Basics of Water Filtration

    The Basics of Water Filtration Most of us know that filtered water is healthier than tap water because of its purity, but how does water filtration work? The basic principle is that filtered water has passed through a filter which removes contaminants through one of several methods, depending on the type of filter. Most water purification systems work in one of three ways ­ by running water ...


    By City Water International

  • Laboratory evaluation of a water-treatment sequence using Moringa oleifera seed coagulant

    A water extract of Moringa. oleifera seed was applied to a treatment sequence comprising coagulation-flocculation-sedimentation-sand filtration. Model waters (kaolinite suspensions) of turbidities 10, 100, 300 and 700 NTU were prepared. For the 10 NTU water, the optimum dose was only evident when sand filtration was incorporated into the treatment sequence. For the higher water turbidities ...


    By Inderscience Publishers

  • Treatment of leather industrial wastewater via combined advanced oxidation and membrane filtration

    The liming/unhairing operation is among the important processes of the leather industry. It generates large amounts of effluent that are highly loaded with organic hazard wastes. Such effluent is considered one of the most obnoxious materials in the leather industry, causing serious environmental pollution and health risks. The effluent is characterized by high concentrations of the pollution ...


    By IWA Publishing

  • Effect of Leaching from Filters on Laboratory Analyses of Collective Organic Constituents

    Membrane and glass fiber filters are widely used in laboratory water and wastewater analyses. During sample filtration, some filters release organic compounds, which may interfere with organic analyses. This research investigated the interferences due to organic leaching in the determinations of dissolved organic carbon, biodegradable dissolved organic carbon, soluble biochemical oxygen demand, ...

  • Evaluation of a filtration/dispersion method for enumeration of particle-associated escherichia coli

    Received for publication January 18, 2007. The transport processes of microorganisms in storm-generated flows have not been clearly elucidated, limiting the ability of computational models to effectively design and evaluate watershed remediation plans. Although several studies have identified association with particulates as a critical factor in predicting microbial transport and fate, no ...

  • Gravity driven membrane filtration system to improve the water quality in rainwater tanks

    The characterisation of rainwater in metropolitan Sydney and in rural New South Wales was undertaken. The results showed that factors such as the lack of vehicular traffic, air pollution and urban contamination meant that rural rainwater water quality was better. The rain water collected in both metropolitan and rural areas generally complied with the 2004 Australian Drinking Water Guidelines ...


    By IWA Publishing

  • Evaluation of Sampling and Field-Filtration Methods for the Analysis of Trace Metals in Ground Water

    Selected ground water sampling and field-filtration methods were evaluated to determine their effects on field parameters and trace metal concentrations in samples collected under several types of field conditions. The study focused on conditions where traditional approaches may produce turbid samples, which often leads to filtration of suspended particles from the sample before laboratory ...


    By QED Environmental Systems

  • Dewatering waste-activated sludge using dissolved gas-flotation followed by filtration

    After the successes of flotation of waste-activated sludge (WAS), using the new technique utilizing CO2 gas as well as using model gas (80% N2+20% CO2) in previous research because of the high water solubility of CO2 gas, the aim of this study is to develop a simple method for dewatering WAS for easier reuse and safe disposal. The paper introduces a laboratory model for dewatering WAS in two ...


    By IWA Publishing

  • Roughing filtration as an effective pre-treatment system for high turbidity water

    Effective water treatment is the prime goal of every water treatment facility. Chakwal Water Treatment Plant in Pakistan has been treating high-turbidity surface water through crude coagulation, sedimentation and slow sand filtration since the early 1980s. The process has always been tedious in terms of high coagulant dosage, large volumes of sludge and short filter runs especially after wet ...


    By IWA Publishing

  • Application of Direct Filtration to MIEX® Treated River Murray Water

    Dissolved natural organic matter (NOM) has been shown to interfere with the coagulation process, particularly with alum (aluminium sulphate) which is the most widely used coagulant in potable water treatment. The additional coagulant demand of the NOM can often be a significant contribution to the overall coagulant dose required for effective turbidity control in conventional water treatment. The ...


    By IXOM Watercare

  • Self-Cleaning Filtration for Pretreatment of Membrane, UV and Ozone Water Treatment Systems

    Recent field data has shown the effectiveness of automatic self-cleaning filters in removing suspended solids down to less than 3 microns in size without flocculents, pre-coats or granulated media. Pre-treatment of ozone systems is often needed to remove organic solids that would utilize high amounts of ozone during oxidation leaving little for complete disinfection. Selfcleaning screen filters ...

  • Retention of heavy metals by stormwater filtration systems: breakthrough analysis

    Biofiltration systems are widely used to mitigate the impacts of stormwater on receiving waters, however their long-term capacity to retain heavy metals has not previously been assessed. Accelerated-dosing laboratory experiments were used to assess the likelihood of breakthrough occurring for three different types of soil-based filter media that are commonly used in stormwater biofilters. In all ...


    By IWA Publishing

  • Laboratory analysis of a system for catchment, pre-treatment and treatment (SCPT) of runoff from impervious pavements

    This article reports the development and construction of a 1:1 scale laboratory prototype of a System for Catchment, Pre-treatment and Treatment (SCPT) of runoff polluted by contaminants washed from impervious pavements. The concept of the SCPT is an online system with an up-flow filter. The filter is composed of geotextile layers and limestone. The laboratory tests carried out were focused on ...


    By IWA Publishing

  • Key issues of ultrafiltration membrane water treatment plant scale-up from laboratory and pilot plant results

    Industrial-scale ultrafiltration (UF) membrane systems have gained wide acceptance for producing safe drinking water. Laboratory and pilot plant studies are often carried out prior to the design of full-scale water treatment plants. Emphases are laid on how accurately these laboratory and pilot plant studies represent actual industrial-scale systems and the limitations. A case study which ...


    By IWA Publishing

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