continuous fouling monitoring Articles

  • Neosens™ on-line Fouling monitoring for Cooling Towers

    A New Approach to Fouling Control Neosens offers innovative, cost effective sensor solutions for monitoring the presence of biofilm and scale in cooling towers, heat exchangers and other industrial process applications. Fouling in cooling systems is a worldwide, multi-billion dollar problem, reducing energy efficiency, increasing maintenance costs and creating health risks due to ...


  • Continuous on-line monitoring of dissolved oxygen in the activated sludge of a sewage treatment plant

    Dissolved oxygen is traditionally measured using a Clark cell, which relies upon a gas-permeable membrane for its opera-tion. Such sensors are subject to fouling with subsequent loss of accuracy, making frequent maintenance and calibration necessary. The objective of this development was to take advantage of specific properties of microelectrode arrays, such as low flow-dependence, insensitivity ...


  • Pushing the limits: optimizing membrane plants via correlating fouling with critical flux

    Abstract The concept of establishing direct correlations between the operating flux, represented by the conversion, and fouling potential of membrane systems has always been of tremendous interest to membrane technology researchers, plant end-users and membrane manufacturers since the advent of membrane technology’s commercial applications worldwide some forty years ago. Several ...


    By MASAR Technologies, Inc.

  • Organic fouling development in a long channel RO membrane cell

    This study was to experimentally investigate organic fouling development in a 1-m long RO membrane channel using alginate as a model organic compound. Five parallel local permeate fluxes with a distance interval of 20 cm along the channel were monitored continuously during the organic filtration tests. It was found that organic fouling became more severe towards the outlet of the channel. This ...


    By IWA Publishing

  • Continuous emission monitoring and control of packed tower odor control systems using the sycamore CEM

    ABSTRACT Packed-tower chemical scrubbers, with sodium hydroxide (caustic) and sodium hypochlorite (bleach), are commonly used to treat foul air from wastewater treatment processes. The available control mechanisms include a pH probe and controller for the sodium hydroxide feed, an oxidation reduction potential (ORP) probe with a controller toestablish the bleach feed, and proprietary ...

  • Preliminary study on novel backwash cleaning for reverse osmosis fouling control in water reuse

    We have demonstrated a novel backwash cleaning technique of direct osmosis (DO)-high salinity (HS) for reverse osmosis (RO) fouling control in water reuse. An UF-RO pilot system was continuously (24-h) operated on site with the secondary effluent as the feed over 4 months. The RO plant was run at 75% recovery and at the membrane flux of 17 l m−2 h−1 (LMH) to simulate the full scale NEWater ...


    By IWA Publishing

  • Quadrasperse Quadpolymer solves major fouling problem at large Gulf Coast Petrochemical Plant

    Background As a result of poor results with a previous water treatment supplier, ChemTreat was given the opportunity to turn things around in a large, open recirculating cooling system for a Gulf Coast chemical plant. The cooling system serviced a light olefins unit with multiplestage, cracked-gas compressor after-coolers operating at a high skin temperature. At a maximum skin temperature of ...


    By ChemTreat, Inc.

  • Monitoring Oil in Cooling Water

    The Situation A municipal power plant in the southern United States operates more than 10 stationary power plant engines capable of producing 52 megawatts of electric power. The plant is part of a larger statewide power grid system. Within the grid, the municipality brokers the purchase or sale of power hourly, based on the needs of municipality and the market rate for power on the grid ...

  • Organics Monitoring: A Practical Guide

    Preventing product loss, lowering waste treatment costs, and reducing system maintenance and energy consumption through organics monitoring in the chemical, refining, food, and wastewater treatment industries. Summary Process water and steam condensate contamination includes organic, inorganic, and biological components. Sources of organic contamination include process ...


    By GE Analytical Instruments

  • Texas refinery identifes the source of boiler contamination and restores production using on-line steam condensate analyzer

    Background A major refinery in Texas, USA, recently experienced steam condensate contamination and major fouling of a boiler resulting in damage that led to an unplanned shutdown. The financial impact of the damaged boiler, unscheduled maintenance and loss of production drove a review of current condensate monitoring techniques. The review panel concluded that current methods of ...


    By GE Analytical Instruments

  • Biofouling Plant Performance

    The City of Clifton, Colorado, designed and built a 2.4 million gallons per day nanofiltration plant to treat Colorado river water and supply the city and nearby areas with drinking water. The plant was partially started in September 1997 with NF Skid 1. It was shutdown in the Spring of 1998 due to low river TDS. The plant was re-started in August 1998. Shortly after, Skid 1 was cleaned after ...


    By MASAR Technologies, Inc.

  • Neosens has been rewarded with the first prize during the CFIA 2010 Innovation Award ceremony in the 'Equipment & Process' category

    The last-born of Neosens, the FS-1000 probe, was conceived for the local, continuous and in-situ fouling monitoring in pipes, heat exchangers and reactors. Based on a patented micro-thermal principle and using the Microsystems technology, the FS-1000 probe is directly implanted inside the industrial equipment to follow-up in real-time the cleaning-in-place (CIP) procedures, ...


  • Treated vs. Untreated Cooling Tower Water: Risks for Your Plant

    When an industrial plant or building decides whether or not to invest in a cooling tower water treatment system, it is a decision that shouldn’t be taken lightly. Petrochemical plants, chemical manufacturers, refineries, and all kinds of large buildings and facilities using cooling towers, whether they’re used as part of the industrial process or for cooling/removing heat from the ...


    By SAMCO Technologies, Inc.

  • RO Feedwater: Treat It Right

    Summary Crossflow membrane filtration systems, such as reverse osmosis (RO), nanofiltration (NF) or ultrafiltration (UF), are good alternatives to traditional filtration and chemical treatment. However, to get the best performance from them, careful attention must be paid to feedwater conditions. Pretreating feedwater can lengthen the life of membrane elements, improve the quality of the ...

  • Dissolved Oxygen – the discussion moves on

    Do Dissolved Oxygen Sensors need Cleaning? The re-emergence of Optical Dissolved Oxygen Sensors around 6-7 years ago generated a lively and interesting discussion which revolved around the relative merits of Optical and Galvanic Dissolved Oxygen sensors. We understand that opinions will differ, so in order to accommodate our customers preferences we are pleased to offer our OxyTechw² ...


    By Partech (Electronics) Ltd.

  • Tri-NOx Multi-Chem Wet Scrubber. Case Study of Our NOx Scrubber in a Plastics Resin Plant.

    As part of a commitment to reduce airborne emissions – or even the threat of such emissions – the Mt. Vernon, IN plant of GE Plastics has installed a NOx scrubber. When such GE Plastics products as Ultem resins are produced, nitric acid is used, and emissions from this step are tightly controlled. But to address upset conditions, the company opted to install an emergency scrubber that can treat ...


    By Tri-Mer Corporation

  • AquaLab Analyzer provides real-time phosphorus measurement in Everglades

    When it comes to ecosystem sustainability, Florida is no backwater. The South Florida Water Management District, which includes the unique Everglades habitat, had a major challenge. The EPA and various governmental authorities have defined limits for many water quality parameters to support a water body’s designated use. Any physical, chemical or biological condition that threatens the designated ...

  • Advanced Water Quality Techniques Course

    Abstract:The development of a strategic water quality monitoring program is based on prioritizing risks to public safety and economic reality. The development of global standardized methods and protocols for automated water quality monitoring would facilitate international communication of water quality information and comparison of standardized methods and protocols. The three primary methods ...


  • Total solution: Gas and particulate analysis in Cement industry

    Cement plants are increasingly required to install continuous emission monitoring systems (CEMS). While these represent a significant financial outlay, a range of other factors also need to be considered when selecting a suitable CEMS. To the inexperienced, selecting a suitable CEM can mistakenly be considered as simply ensuring that the applicable national regulations (eg MACT in the USA, ...


    By Environnement S.A

  • Global solution: Gas and particulate analysis in Cement industry

    Cement plants are increasingly required to install continuous emission monitoring systems (CEMS). While these represent a significant financial outlay, a range of other factors also need to be considered when selecting a suitable CEMS. To the inexperienced, selecting a suitable CEM can mistakenly be considered as simply ensuring that the applicable national regulations (eg MACT in the USA, ...


    By Environnement S.A

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