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Dissolved Oxygen Monitoring Applications

  • Water quality monitoring systems for cooling water treatment industry

    A number of treatment products are often added to prevent corrosion, scaling and fouling. Coating of sensors and other effects of these products must be taken into account when selecting analyzers. Discharge monitoring needs special attention because zero measurements must be reliable over time with little maintenance.

    By SWAN Analytische Instrumente AG based in Hinwil, SWITZERLAND.

  • Algae control solutions in ponds and lakes for Aquaculture sector

    For aquaculture QM Environmental Services offers several microbial formulations plus oxygen infusing systems that can be applied for algae control in ponds and lakes or for intensive fish breeding.

    By QM Environmental Services Ltd. based in The Hague, NETHERLANDS.

  • Headworks Odor and Corrosion Control Using Hydrogen Peroxide

    Hydrogen Peroxide typically controls odors and corrosion at treatment plant headworks by direct oxidation of hydrogen sulfide (H2S) within the wastewater. In the direct oxidation mode, H2O2 is applied to the wastewater 5-30 minutes prior to the point where the odors are being released, generally as the wastewater line enters the plant boundary. The efficiency of hydrogen peroxide treatment depends upon the available reaction time, the level of iron in the wastewater (reaction catalyst), wastewater pH and temperature, and the initial and target levels of H2S odor. Under optimal conditions, effective dose ratios are 1.2 - 1.5 parts H2O2 per part dissolved sulfide, and can be reliably estimated through beaker tests. H2O2 + H2S → S0 + 2H2O Frequently, control of odors through the primary clarifiers is wanted. In such case, the mechanism of control is both direct oxidation of H2S (as it rises from the solids blanket), and prevention of odor generation (by supplying dissolved oxygen). Control is typically achieved with a booster dose of 1-2 mg/L H2O2 added to the clarifier influent. Higher doses or alternate modes of addition may be required in cases where: 1) hydraulic retention times are > 2-3 hours; 2) solids blanket depths are > 1-2 feet; 3) soluble BOD levels are > 200-300 mg/L; or 4) waste activated sludge is co-settled with the primary solids. 2H2O2 → O2 + 2H2O

    By USP Technologies based in Atlanta, GEORGIA (US) (USA).

  • Sludge monitoring for water and wastewater industry

    Improved monitoring and automation can deliver more efficient waste treatment and reduced energy consumption and improved effluent quality. The cost of treatment and the quality of effluent discharge can thus be significantly reduced.

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

  • Fermentation Off-Gas Analysis

    In pilot plant and production scale fermentors, information relating to yield of product is of high importance. Hiden's gas analysers are configured with a multiport Off-Gas analysis manifold enabling simultaneous sampling from multiple fermentors. Data is used for the calculation of the respiratory quotient, carbon production rate and oxygen uptake rate. The Off-Gas measurement provides the respiratory quotient in a time and space averaged form and with good response time. By comparison data from multiple dissolved species probes are more specific and can provide information about stirring efficiency, aeration and feed distribution within the fermentor. Dissolved gas measurements have the advantage of giving direct information on gas uptake and for dissolved output rates. Hiden Analyticaloffers systems with either Off-Gas or dissolved species inlets or both.

    By Hiden Analytical based in Warrington, UNITED KINGDOM.

  • Fermentation Off-Gas Analysis

    In pilot plant and production scale fermentors, information relating to yield of product is of high importance. Hiden's gas analysers are configured with a multiport Off-Gas analysis manifold enabling simultaneous sampling from multiple fermentors. Data is used for the calculation of the respiratory quotient, carbon production rate and oxygen uptake rate. The Off-Gas measurement provides the respiratory quotient in a time and space averaged form and with good response time. By comparison data from multiple dissolved species probes are more specific and can provide information about stirring efficiency, aeration and feed distribution within the fermentor. Dissolved gas measurements have the advantage of giving direct information on gas uptake and for dissolved output rates. Hiden Analyticaloffers systems with either Off-Gas or dissolved species inlets or both.

    By Hiden Analytical based in Warrington, UNITED KINGDOM.

  • Water quality monitoring systems for feedwater, storm & condensate industry

    The most important parameters in Water/Steam Cycles such as Cation conductivity, dissolved oxygen and pH are available as pre-assembled and factory tested units. Dedicated analyzers for sodium, silica, phosphate and hydrazine are also factory tested and calibrated for immediate operation.

    By SWAN Analytische Instrumente AG based in Hinwil, SWITZERLAND.

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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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    Oceanographic Monitoring

    For survey operations up to 6000m depth (and deeper by special request), Valeport offer instruments to measure and record the classic physical parameters of Temperature, Depth, Salinity, Density, Currents and Waves. Along with the most accurate Sound Velocity sensors in the world; the ability to interface other parameters / sensors such as pH, Dissolved Oxygen Turbidity, Flourometer, Transmissometer and PAR; Housings and deployment frames to suit in-line moorings, profiling and seabed deployments, Valeport can cater for all your oceanographic survey requirements.

    By Valeport Ltd based in Totnes, UNITED KINGDOM.

  • Ozone generators for aquaculture applications

    Ozone provides both economical and ecological advantages to the Aquaculture industry. Ozone oxidation of aqua-farms improve water quality, destroys organics,  and increases DO levels which result  in faster growth rates, decreased death tolls, and provides an overall healthier and safe environment for fish.

    By Absolute Systems Inc. based in Edmonton, ALBERTA (CANADA).

  • Energy reduction and coagulation process control for wastewater treatment industry

    One of the biggest costs for water-water treatment is energy consumption; the cost of which is likely to escalate with increased demand. Ineffective process control may not only be costly but environmentally impacts though the inefficient use of an un-renewable resource. Furthermore, poor process control in one area may also impinge on neighbouring processes ultimately affecting effluent water quality.

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

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