oxygen probe Articles

  • Boiler Dissolved Oxygen Control

    DISSOLVED OXYGEN CHEMISTRY Dissolved Oxygen (DO) is a measure of the amount of oxygen, usually thought of as a gas, that is dissolved in a liquid such as water. Oxygen is essential to life and is also the most common element found taking part in corrosion reactions. DO can be thought of as the fuel needed for the corrosion process to proceed. It is the corrosion reactions that necessitate ...


    By IC Controls Ltd.

  • The most reliable oxygen meter for the aeration tank

    In a direct comparison with a conventional O2 probe, the new HACH LANGE LDO probe took part in a ➔ trial at the sewage treatment plant for a period of nine weeks. The LDO technique proved its worth by the superior quality ofthe results and its easy handling. In particular, it excelled in terms of the extremely small amount of probe fouling. At the A stage of the Nieuwveer sewage treatment ...


  • On-Line Nitrate/Nitrite Probes for BNR Process Control

    ABSTRACTReal time nitrogen monitoring plays an increasingly important role for the successful biological nutrient removal at wastewater treatment plants. Though traditionally dissolved oxygen has been the main process control parameter a greater understanding of the biological mechanisms and process conditions like nitrite/nitrate concentrations to achieve lower effluent values becomes necessary, ...

  • Why it is important to measure Dissolved Oxygen in aeration lanes

    Dissolved Oxygen is a key parameter in the efficient treatment of waste water during the secondary treatment stage; the point at which organic waste is oxidised to form carbon dioxide, water and nitrogen compounds. It is important to act on accurate ...


    By Partech (Electronics) Ltd.

  • Why it is important to measure Dissolved Oxygen in aeration lanes

    Dissolved Oxygen is a key parameter in the efficient treatment of waste water during the secondary treatment stage; the point at which organic waste is oxidised to form carbon dioxide, water and nitrogen compounds. It is important to act on accurate measurements of Dissolved Oxygen in activated sludge plants for the following reasons: To ...


    By Partech (Electronics) Ltd.

  • Theory to Practice: Oxygen Transfer and the New ASCE Standard

    ABSTRACTOxygen transfer is an important part of wastewater treatment and accounts for as much as 60% of the energy consumption for the activated sludge process. Prior to 1984, no standard method for quantifying oxygen transfer existed, which created problems in the design and warranties for treatment plants. The ASCE Standard for the Measurement of Oxygen Transfer in Clean Water and the ASCE ...

  • Probing the debromination of the flame retardant decabromodiphenyl ether in sediments of a boreal lake

    After decades of using polybrominated diphenyl ethers (PBDEs) as flame retardants, a large reservoir of these toxins has accumulated in ecosystems worldwide. This study used an innovative approach to examine whether the fully brominated PBDE, decabromodiphenyl ether (decaBDE), degrades to more toxic congeners in aquatic environments. We incubated intact sediment microcosms with high‐purity ...


    By John Wiley & Sons, Ltd.

  • Measurement of Particle-Bound Reactive Oxygen Species in Rubidoux Aerosols

    The diurnal variations in the concentrations of reactive oxygen species (ROS) in various size fractions were determined for ambient particles in Rubidoux, CA. Sampling of particles was conducted at 3 h intervals using a cascade impactor. The collected particles were reacted with dichlorofluorescin (DCFH), a non-fluorescent probe that fluoresces when oxidized. The factors affecting the diurnal ...


    By Springer

  • Can I use two probes of the same type with a Hach HQ40D meter?

    Yes – two probes of the same type can be used with the Hach HQ40D. The Hach HQ40D is a multi meter with ...


    By Camlab Limited

  • Product of the Month – Handy Polaris 2 Portable Dissolved Oxygen Meter with Datalogger

    This month the focus is on the Handy Polaris 2 Portable Dissolved Oxygen Meter with Datalogger. Over the summer months we have seen increased interest in the instrument. Warmer temperatures can affect the chemistry, biological processes and dissolved oxygen levels in water, making the Handy Polaris 2 a popular ...


    By Partech (Electronics) Ltd.

  • Practice report - Process analysis aeration control NH4D SC ISE ammonium probe

    The idyllic scene in the photo above is deceptive, as the tranquil oxidation ditch of the Rommerskirchen-Villau sewage treatment plant (PE 5,000) could be more sparing with its oxygen transfer. The plant operator, the Erftverband(a wastewater disposer with its headquarters in Bergheim), has therefore decided to improve its operating efficiency. Many other small and medium-sized plants are in a ...


  • Precise Contaminant Distribution Delineation Using Membrane Interface Probe (MIP) Technology (PDF)

    Project site: a former Air Force Base, Portsmouth, NH Project objectives: to obtain a comprehensive set of data regarding the distribution of the jet fuel in the subsurface prior to the injection of Oxygen Release Compound (ORC), a bioenhancing product. The subsurface data were used to achieve precise placement of the ORC. Technology utilized: Membrane ...


    By REGENESIS

  • Hiden ESPion plasma probe measurements on a hollow-cathode based large-volume plasma source

    Vacuum-based surface engineering and coating processes require plasma sources generating a high charge carrier density in order to achieve enhanced sputter and activation effects. Fraunhofer FEP is providing a hollow-cathode based plasma source, which produces homogeneous large-volume plasmas of up to 1 m3 with maximum plasma densities of more than 1012 cm-3 at chamber pressures between 0.1 and ...


    By Hiden Analytical Ltd.

  • Continuous measurement of Process oxygen for Claus sulfur recovery unit (sru) start-ups and shut-downs case study

    During start-up and shut-down, any time a sulfur recovery unit (SRU) transitions from ambient temperature through fuel gas warm up to the introduction of acid gas, measurement of 02 stoichiometry is critical. Historically, operators have manually taken samples using a portable electrochemical type Os analyzer. While giving more or less satisfactory results, the requirement for more stringent ...

  • Measuring Short-Term BOD

    Measurement of oxygen uptake rates in activated sludge processes is essential to their satisfactory operation. Traditionally, oxygen uptake rates (OUR) have been determined by using a dissolved oxygen probe to measure the change in dissolved oxygen in a BOD bottle. While this method is rapid, it provides only a snapshot, at a single point in time, of the oxygen uptake rate reaction in a treatment ...


    By Challenge Technology

  • X-ray absorption fine structure and nanostructures

    The X-ray absorption fine structure (XAFS) is a powerful tool to investigate local atomic structures in matter. The XAFS can select a specific type of atom as a probe atom and measure the structural environments near the probe atom. The XAFS can therefore describe the bond lengths, bond-length distributions and the species of the atoms located around the probe atom. XAFS measurements can be made ...


    By Inderscience Publishers

  • In vitro studies on radiation induced membrane oxidative damage in apoptotic death of mouse thymocytes

    Radiation oxidative damage to the plasma membrane of cells and its consequences in the mechanism of apoptotic death have been receiving growing attention of radiation scientists in recent years. We have employed a fluorescence probe method to determine changes in the permeability and fluidity of the plasma membrane of mouse thymocytes following γ irradiation mwithin a low to moderate ...


    By Inderscience Publishers

  • Ozone systems for beginners

    This paper is intended for people who know a cooling tower when they see one but have little or no knowledge of their care or what part ozone plays. I have tried to make this as simple as possible and there is even a block diagram on the last page to help you out. Ready? Okay, here is what you need to know first: The sole function of ozone use in evaporative cooling towers is to disinfect water. ...


    By Zentox Corporation

  • Influence of local calibration on the quality of online wet weather discharge monitoring: feedback from five international case studies

    This paper reports about experiences gathered from five online monitoring campaigns in the sewer systems of Berlin (Germany), Graz (Austria), Lyon (France) and Bogota (Colombia) using ultraviolet–visible (UV–VIS) spectrometers and turbidimeters. Online probes are useful for the measurement of highly dynamic processes, e.g. combined sewer overflows (CSO), storm events, and river ...


    By IWA Publishing

  • The use of bottle caps as submerged aerated filter medium

    In this study, a submerged aerated filter (SAF) using bottle caps as a support medium was evaluated. The system was fed with effluent from an upflow anaerobic sludge blanket system at ETE 2-South wastewater treatment plant, under different volumetric organic load rates (VOLRs). The population of a particular nitrifying microbial community was assessed by fluorescent in situ hybridization ...


    By IWA Publishing

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