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Oxygen Monitoring Applications

  • Waste water respirometry solutions for process optimisation

    Respiration rate of activated sludge has been recognised as a key controlling element in the modelling of process control, by the International Water Association Task Group. Actual respiration rate of the sludge in the aeration tanks, as well as the endogenous and maximum respiration rates are variables that indicate the rate of BOD removal and aeration requirements. The maximum respiration rate is also closely linked to the Critical Oxygen Concentration point, that is, the point at which diffusion over the bacterial cell walls ceases and therefore biodegradation is significantly compromised.

    By Strathkelvin Instruments Ltd. based in North Lanarkshire, UNITED KINGDOM.

  • TOC Correlation to BOD or COD

    Challenge: Biochemical Oxygen Demand (BOD) and Chemical Oxygen Demand (COD) are traditional parameters analyzed in the laboratory to determine organic matter in water and wastewater. Wastewater facility operators need to have constant data to monitor their discharges and optimize treatment processes (biological treatment, chemical dosing, etc). The requirements of BOD and COD analysis prevent them from being implemented as control parameters, however. The BOD five-day analysis time requirement does not allow an operator to use the data for process optimization and. although COD requires less time than the BOD, its analysis includes the use of hazardous chemicals and has no constant analysis capability.

    By GE Analytical Instruments based in Boulder, COLORADO (USA).

  • O2 Monitoring in Air

    Oxygen (O2) is a colorless odorless gas, essential to all life on Earth but damaging in high concentrations. An O2 analyzer should thus be employed for safety management and air pollution prevention purposes. LasIR MP110 is perfect for continuous emission monitoring of O2. It is based on TDLAS technology and can be calibrated as an O2 analyzer, providing accurate and reliable measurements. It quickly responds to changes in compound concentration, thus providing continuous emission monitoring for the specified gas.

    By Unisearch Associates Inc. based in Concord, ONTARIO (CANADA).

  • Water intake protection monitoring for wastewater treatment industry

    Intake protection systems have been extensively installed to protect water treatment works, from ingress of polluted water and waste-water plants from toxic chemical loads. A suitable system typically comprises a suit of instrumentation, measuring key chemical, physical and indicator parameters dependant upon the identified risks, associated with the individual site activity or discharges from neighbouring industry.

    By Pollution & Process Monitoring Ltd based in Sevenoaks, UNITED KINGDOM.

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    Process monitoring solutions for O2 oxygen monitoring

    OPSIS EEx Zone 1 and 2 certified monitoring equipment meets the demands for monitoring in harsh areas with a high amount of corrosive gaseous compounds. OPSIS offers two monitoring solutions, TDL (Tuneable Laser Diode) technology with ER060L-EEx emitter and receiver set, for harsh installations, and OPSIS O2000 oxygen monitor. The most suitable technique is used for the application at hand.

    By Opsis AB based in Furulund, SWEDEN.

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    Medical solutions for the oxygenators

    A number of components in a typical heart-lung machine require precise gas flow control. One typical component is the oxygenator, which is used for exchanging oxygen and carbon dioxide in the blood during surgical procedures. Axetris offers solutions for high-performance oxygen gas flow control in medical applications in the form of meters, controllers or gas mixing manifolds.

    By Axetris Ag based in Kaegiswil, SWITZERLAND.

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    High quality gas sensor solutions for Controlled Atmosphere (CA) storage

    Precise regulation of O2, CO2 and N2 concentrations. A controlled atmosphere is an agricultural storage method in which the oxygen, carbon dioxide and nitrogen concentrations are regulated. The humidity and temperature are also controlled, resulting in a slow loss of quality during prolonged bulk storage of products such as apples, pears, grains, legumes, etc.

    By Edinburgh Instruments Ltd based in Livingston, UNITED KINGDOM.

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    Oxygen Monitoring from Aerobic and Anaerobic for determination of biodegradation kinetics by respirometry

    Intrinsic kinetic tests involve adding relatively high concentrations of organic substrate to small concentration of acclimated microorganisms so that the COD/VSS ratio typically is greater than 10. Kinetic parameters are then determined by non-linear modeling using well-known relationships between biological growth and oxygen uptake.

    By Respirometer Systems and Applications, LLC based in Springdale, ARKANSAS (USA).

  • Wastewater solutions for the industrial effluent pollution management

    Problem: Industrial manufacturers face stringent regulations for discharging wastewater to the environment and municipal sewer systems. Biochemical Oxygen Demand (BOD) is a primary concern for many discharge limits, as wastewaters high in BOD can have adverse impacts on the aquatic environments by leading to oxygen depletion. In some cases, as a means to supplement BOD, it is also desirable to monitor chemical oxygen demand (COD) of industrial effluents. Both of these tests, are time and labour intensive reducing the frequency at which they can be measured for a given effluent.

    By Real Tech Inc. based in Whitby, ONTARIO (CANADA).

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    Oxygen Permeation Analyzers for Packaging Industry

    Systech Illinois` oxygen permeation analyzers offer reliable and versatile testing for all bottles, packages and films. These instruments provide extremely fast purge down time; accurate readings at the lowest levels and the highest quality sensors in the market. The changeover from wet to dry sample runs is the fastest on offer. Precise control gives a wide sample temperature range of 5° to 50°C and a measured and controlled relative humidity range of 20 to 90% RH.

    By Systech Instruments Ltd based in Thame, UNITED KINGDOM.

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    Controlled Atmosphere Glove Boxes and Nitrogen Dry Boxes for Process Industry

    Glove boxes are designed for handling both hazardous substances and atmosphere sensitive materials. For controlled atmospheres, nitrogen dry boxes provide an isolated work environment for processing samples or handling air-sensitive materials while maintaining an anaerobic or other gas specific environment within the glove box. For work with hazardous materials, glove boxes provide a leak-tight environment protecting the user from exposure to potentially dangerous materials. Glove box applications include; anaerobic testing, biological research, catalyst research, hazard material contamination and pharmaceutical packaging.

    By Systech Instruments Ltd based in Thame, UNITED KINGDOM.

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    High quality gas sensor solutions for modified atmosphere packaging

    Extending the shelf-life of perishable foods. Changing the atmosphere inside the packaging the shelf life of many fresh products can be extended. For example, by decreasing the amount of oxygen and increasing the carbon dioxide the shelf life of many fruits may be significantly improved. Using various gas combinations it is also possible to slow down the growth of bacteria and extend the shelf-life of other perishable foods like meat, fish and vegetables.

    By Edinburgh Instruments Ltd based in Livingston, UNITED KINGDOM.

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    Process Analytics - Biotech and Hygienic Processes

    METTLER TOLEDO/INGOLD offers a wide range of hygienic and sterilizable/auto- clavable measurement solutions for biotech and hygienic processes. Based on field experiences and expertises in hygienic design for CIP (Cleaning-in-Place) and SIP (Sterilization-in-Place) applications our solutions comply with the most stringent industry requirements. Critical biotech/hygienic applications in pharmaceutical, food and beverage are controlled by measuring pH, conductivity, dissolved oxygen, CO2 and turbidity.

    By Mettler - Toledo Int. Inc based in Greifensee, SWITZERLAND.

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    Continuous emissions monitoring for sulphuric acid production plants

    The process control of a sulphuric acid plant needs good and reliable detection of gas phase sulphur dioxide (SO2). To measure SO2 is a challenge due to the corrosive environment and high concentration of SO2. Several places in the process needs to be monitored and to transport the sample gas is difficult. A large dynamic range is needed as the SO2 concentration can vary between 15% volume and a few mg/m3. Most systems installed need a lot of maintenance, sometimes as often as every day.

    By Opsis AB based in Furulund, SWEDEN.

  • Oxygen on-site generation systems for hospitals

    Demand for oxygen generators in the medical field is growing rapidly. Stricter international medical regulations is also putting a tougher demand on oxygen plants for flow, pressure and purity monitoring.

    By Oxymat A/S based in Helsinge, DENMARK.

  • Gas detection analyzers for wastewater treatment industry

    Regulations prohibit facilities from discharging flammable or explosive wastes from their processes into the wastewater collection system. These wastes are not only a fire and explosion hazard but they can also effect the efficient and effective operation of the treatment facility. PrevEx Flammability analyzers are used to continuously monitor the waste stream for flammable gases and vapors. Their unique design and operating technology make them the ideal analyzers for the harsh conditions found in the sewer environment.

    By Control Instruments Corporation based in Fairfield, NEW JERSEY (USA).

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