Surface Contaminants Articles

  • Organic Acid Fermentation Broth Clarification

    Although batch processes are currently used, a number of more advanced techniques have been investigated in order to improve the process efficiency. Promising every result must have been achieved using the tangential flow filtration in the continuous organic acid fermentation. One of ...


    By Jiangsu Jiuwu Hi-tech Co

  • Organic Acid Fermentation Broth Clarification

    Although batch processes are currently used, a number of more advanced techniques have been investigated in order to improve the process efficiency. Promising every result must have been achieved using the tangential flow filtration in the continuous fermentation systems. One of the main advantages of tangential flow filtration is that the higher biomass concentrations are possible because cells ...


    By Jiangsu Jiuwu Hi-tech Co

  • Amino Acid Fermentaion Broth Clarification

    Amino acids are the basic unit of protein composition, most amino acids are produced by fermentation method. Fermentation broth is an extremely complex system and contains microbial cells, metabolites, unconsumed medium, etc. The traditional method such as centrifuge and plate and frame pressure filtration,  filtrate quality is poor, soluble protein, sugar, peptide, pigment and other ...


    By Jiangsu Jiuwu Hi-tech Co

  • Evolution of the Smart Probe

    STS have been working on the next evolution of our ionising radiation contamination simulators! ...

  • Guidelines For Cleaning Pharmaceutical Processing Equipment

    Cleaning pharmaceutical processing equipment is challenging. Cleaning methods, soils present, type of manufacturing equipment, surfaces cleaned, choice of cleaning detergent and temperature should all be considered when setting up a cleaning procedure. Cleaning validation methods are required. The entire cleaning process must be standardized and documented according to the FDA’s cGMP ...

  • How to Properly Clean Medical Devices

    When it comes to medical devices cleanliness is crucial. All medical devices, whether they are disposable, implantable or reusable, must be cleaned during the manufacturing process to remove oil, grease, fingerprints and other manufacturing soils. Reusable products must also be thoroughly cleaned and sterilized between each use to avoid infecting patients or causing illness. Reaching the right ...

  • AMETEK Land - Light Metal Age - Non-Contact Temperature Measurement for Wrought Aluminium

    Accurate temperature measurement is critical in aluminum rolling and extrusion processing. This article will address the importance of accurately measuring the temperature at various stages in the manufacturing of these wrought aluminum products, particularly rolled aluminum, presenting both challenges and solutions. Sensor Types There are two main sensor types: contact ...


    By AMETEK Land

  • Clarifier rehabilitation in Clermont, Canada - Case study

    CANADIAN PULP MILL CLARIFIER Rehabilitation & Protection From Chemical Attack When Resolute Forest Products was determining a solution for rehabilitation and protection of their 50,000 square foot concrete clarifier damaged from mild chemical attack and abrasion from their pulping process they contacted MBI Corexcel, a local corrosion-resistant specialized contractor, for ...


    By Sauereisen Inc.

  • Mobile weather sensor MARWIS in operation on airports - Italy - Case Study

    The mobile weather sensor MARWIS is succesfully in operation on several airports in Italy, like Airport Bergamo BGY, Airport Venedig, Airport Triest and others. Customer opinion - Mr. Fabio - Airport Bergamo: The MARWIS from Lufft is a very useful tool to get all necessary runway weather data in real time (for example the thickness of the contaminant, the ...

  • Pool water quality and prevalence of microbes in filter backwash from metro-Atlanta swimming pools

    During the 2012 summer swim season, aquatic venue data and filter backwash samples were collected from 127 metro-Atlanta pools. Last-recorded water chemistry measures indicated 98% (157/161) of samples were from pools with ≥1 mg/L residual chlorine without stabilized chlorine or ≥2 mg/L with stabilized chlorine and 89% (144/161) had pH readings 7.2–7.8. These water quality parameters are ...


    By IWA Publishing

  • Sample preparation is the key to quality analysis with a laser analyser

    Sample preparation is the most important step of any chemical analysis. To get the best results with any elemental alloy analyser regardless of the technology, the sample must be clean before taking a measurement. Otherwise the results are always compromised at least to some extent. The effect of dirty surfaces will vary and some technologies are more forgiving to sample surface conditions than ...

  • Enforcement of Superfund Liabilities Expands Beyond Environmental Avenues

    A recent Superfund-related case in New Jersey highlights how US authorities, both Federal and State, will not take kindly to companies that seek to circumvent their environmental responsibilities. ...

  • Quantitative microbial risk assessment to estimate the health risk from exposure to noroviruses in polluted surface water in South Africa

    This study assessed the risks posed by noroviruses (NoVs) in surface water used for drinking, domestic, and recreational purposes in South Africa (SA), using a quantitative microbial risk assessment (QMRA) methodology that took a probabilistic approach coupling an exposure assessment with four dose-response models to account for uncertainty. Water samples from three rivers were found to be ...


    By IWA Publishing

  • PeCOD® Case Study #13 Airport De-Icing

    De-icing of aircrafts and airfield pavement is important to ensure the safety of passengers and cargo operators. These operations can have negative environmental impacts, due to the presence of ethylene glycol and propylene glycol, which contribute to high levels of BOD in surface water.  Regulations are in place to ensure that waste from de-icing operations are properly collected and ...


    By MANTECH Inc.

  • Higher alkyl sulfatase activity required by microbial inhabitants to remove anionic surfactants in the contaminated surface waters

    Biodegradation of anionic surfactants, like sodium dodecyl sulfate (SDS) are challenged by some bacteria through the function of the enzyme alkyl sulfatases. Therefore, identifying and characterizing bacteria capable of degrading SDS with high alkyl sulfatase enzyme activity are pivotal. In this study, bacteria isolated from surfactant contaminated river water were screened for their potential ...


    By IWA Publishing

  • Surface water polycyclic aromatic hydrocarbons (PAH) in urban areas of Nanjing, China

    The concentration, sources and environmental risks of polycyclic aromatic hydrocarbons (PAHs) in surface water in urban areas of Nanjing were investigated. The range of ∑16PAHs concentration is between 4,076 and 29,455 ng/L, with a mean of 17,212 ng/L. The composition of PAHs indicated that 2- and 3-ring PAHs have the highest proportion in all PAHs, while the 5- and 6-ring PAHs were the least ...


    By IWA Publishing

  • Surveying for 600-Meter-Deep Groundwater in Kenya - Case Study

    The importance of groundwater can’t be overstated. It’s crucial for life across the globe, and, in the developing world, access to groundwater is at a premium. However, with resistivity imaging groundwater exploration techniques, even when you’re in one of the driest locations on Earth, deep groundwater is possible to locate. ...


    By Advanced Geosciences, Inc.

  • Measuring hydrogen off-gas in nuclear reactor - Case Study

    Nuclear reactor coolant removal monitored by hydrogen measurements provided by Systech's 542 programmable gas analyzers NNC Limited is using Systech's 542 programmable gas analyzers to monitor hydrogen off-gas in test rig for Dounreay Fast Breeder Reactor decommissioning. Decommissioning nuclear reactors is not only a matter ...


    By Systech Instruments Ltd

  • What is an Ion Exchange System and How Does it Work?

    Ion exchange (IX) systems are used across a variety of industries for water softening, purification, and separation purposes. While the chemistry of individual ion exchange reactions vary from one application to the next, IX is a treatment process where dissolved ions are replaced by other, more desirable, ions of a similar electrical charge. If you’re wondering whether IX is right for your ...


    By SAMCO Technologies, Inc.

  • Tracking the downstream impacts of inadequate sanitation in central Appalachia

    Poor sanitation in rural infrastructure is often associated with high levels of fecal contamination in adjacent surface waters, which presents a community health risk. Although microbial source tracking techniques have been widely applied to identify primary remediation needs in urban and/or recreational waters, use of human-specific markers has been more limited in rural watersheds. This ...


    By IWA Publishing

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