February 2013, Vol. 25, No.2


Product Focus: Disinfection


Water purification system
The arium® pro series water purification system features an integrated glass interface display with touch-function and user-friendly menu navigation. The menu guidance enables users to produce laboratory-grade water easily. Volume- and time-controlled dispensing, coupled with freely adjustable flow rates, provides users with flexibility in routine applications. Other features include an activatable PIN code for basic configurations and a variety of new data-logging features. The systems can be installed as a bench-top, wall-mounted, or below-bench unit. Sartorius Stedim Biotech (Aubagne, France). 


Ultraviolet disinfection systems
The Blackcomb series of ultraviolet disinfection systems is designed to treat residential applications. The Blackcomb4.0 is designed with a splashproof controller and a single-ended reactor. The Blackcomb5.0 offers an innovative controller with a color interface displaying the system’s status, as well as QR codes for a link back to the company’s website for installation and maintenance guidance. The Blackcomb6.0 comes complete with an ultraviolet sensor, which continuously monitors the system’s intensity. Luminor Environmental Inc. (Guelph, Ontario). 


Chlorine dioxide sensors
CLD500 chlorine dioxide sensors use advanced amperometric measurement technology to accurately monitor chlorine dioxide in disinfection applications. With two models covering the 0–2 ppm and 0–10 ppm full-scale ranges, the sensors can be used in new installations or as field replacements for existing sensors in chlorine dioxide generators, pools, and other water treatment systems. The advanced sensing membrane keeps cross-sensitivity interference from free chlorine to a minimum. The sensors also feature improved stability over the entire operating temperature range and an integral two-wire-loop-powered transmitter with 4–20-mA output, which delivers readings to process control systems. Sensorex (Garden Grove, Calif.). 


Ultraviolet solution
The Wedeco Duron open-channel ultraviolet disinfection system is designed to provide clean, safe treated wastewater of the highest standard using minimum energy. A key benefit of the solution is its small footprint. An innovative 45-degree vertical-incline design, combined with Wedeco Ecoray 600-W lamps, minimizes the number of lamps needed. Another feature is sensor-based dose pacing, which applies the correct dosage while conserving both power and lamp life. Xylem (White Plains, N.Y.). 


Large-scale ultraviolet disinfection
TrojanUVSigna™ is designed for large-scale wastewater disinfection applications. The system will disinfect an average of 52 mgd of water, with a peak capacity of 150 mgd. Other features include system suitability, the lowest number of ultraviolet lamps, and ease of operation and maintenance. Trojan Technologies (London, Ontario). 


The GridBee GS-12 family of electric mixers is designed to rest on the floor of potable-water storage tanks and constantly circulate water to evenly distribute disinfectants to kill bacteria. The mixers are installed through a 12-in.-diameter or larger hatch. There is no need to enter or drain the tank for installation or to place the mixer in the center of the tank. Installation directly below the hatch will mix the entire tank. The mixers are compatible with GridBee and SolarBee Chlorine Boost and THM removal systems to ensure optimal water quality and to meet the U.S. Environmental Protection Agency Stage 2 Disinfection Byproducts Rule. SolarBee Inc. (Dickinson, N.D.). 


The 620 hypochlorite pump features off-gassing to prevent vapor lock while maintaining ± 0.1% accuracy in hypochlorite metering. The pump delivers flow rates at pump head speeds that don’t compromise tube life and handles such harsh chemicals as sodium hypochlorite, ferric chloride, sodium bisulfate, aluminum, fluoride, carbon and lime slurries, polymers, aqueous ammonia, potassium permanganate, and caustic slurries. With no valves or seals to clog, it requires minimal maintenance. Watson-Marlow Pumps Group (Wilmington, Mass.). 


Chlorine measuring system
The OPTISYS CL 1100 determines the chlorine content in drinking water. This device is ideal for disinfection of clean water, monitoring chlorine as a growth inhibitor, and product disinfection. The device measures chlorine using a sensor with a three-electrode design. Its features include two gold electrodes on the outside, which are resistant to fouling, making it always ready for use even if no chlorine has been added for a long time, and a membrane-free potentiostatic sensor with no pores that can be clogged by biological fouling. Krohne Inc. (Peabody, Mass.).  

Fluidized-bed reactor
The Small-Scale Fluidized Bed Reactor systems for treatment of selenium in coal-mining waters enables coal-mine operators to treat flows of less than 100 gal/min. The reactor can achieve selenium concentrations lower than 5 µg/L at discharge, even in the presence of high levels of nitrate. The systems can be automated and delivered in standard-size ISO containers to difficult-to-reach locations. Installations require minimal site preparation and engineering and can be monitored remotely. Envirogen Technologies Inc. (Kingwood, Texas). 


M embrane filtration
The Engineered Filtration System design is fully automated and includes the option for remote monitoring. The system can be used in such applications as membrane bioreactors, wastewater polishing, industrial process wastewater treatment, prefiltration before reverse osmosis, groundwater treatment, landfill leachate treatment, oil/gas-produced-water treatment, and many other filtration applications. Other features include ceramic flat-sheet membranes, preassembled filtration components, and fully automated controls. SJE Rhombus (Detroit Lakes, Minn.). 


Mobile treatment solutions
The mobile PureClO2® ElectroChemical chlorine dioxide generators range in capacity from 10 to 120 lb/d, with additional sizes to be added. Each unit produces 99.5% pure chlorine-free chlorine dioxide with safe and reliable performance using a remote on/off dosing pump control. Other features include a color touch-screen operator-interface terminal and an integrated programmable logic controller capability. PureLine Treatment Systems LLC (Palatine, Ill.). 


Phosphorus removal
The RTC101 P-Module phosphorus control system is a turnkey solution providing real-time control of chemical dosing that helps maintain consistent phosphorus levels in effluent waters. The system can be used for both open (feed-forward) and closed-loop (feed-back) control of chemical dose. The chemical-feed pump is controlled continuously via a 4–20-mA signal or a dry-contact relay. Both outputs can be used together. Hach Co. (Loveland, Colo.). 


The modified version of Microluft (patent filed) is a bottom-mounted aerator that sucks atmospheric air to the bottoms of dams and ponds by creating a vortex in a pipe. At the bottom, the air reaches the specially designed impeller that disperses the air as very fine bubbles into the surrounding water. The system is designed not to clog in unfiltered wastewater. Sorubin (Umeå, Sweden). 


Conduit and couplings
T&B ® Fittings Stainless Steel Conduit and Couplings are available in Type 304 and Type 316 stainless steel and designed to resist corrosion in harsh environments in a variety of applications where electrical systems are exposed to corrosive elements, including disinfection operations and motor-control centers in water treatment facilities. The couplings also can withstand washdown and sanitation operations typical in food and beverage processing plants. The conduit and couplings are easy to clean and feature standard national pipe thread for easy installation. Thomas & Betts (Memphis, Tenn.). 


Volumetric titrator
The AQUACOUNTER ® Karl Fischer Volumetric Titrator (AQV-2200S) is designed to be rugged, reliable, long lasting, and ecofriendly, with small-volume titration cells requiring only 20 mL of titration solvent for accurate measurements. The titrator is suited for a wide range of concentrations, from 100 ppm to 100% water content, with its maximum capability for automation and upgrades. Combining one additional station with either a volumetric or coulometric module allows two different measurements to be performed at the same time. Users can add various peripherals, such as a second channel, and the system recognizes the new channels and begins working with them immediately. JM Science (Grand Island, N.Y.). 


Oxygen monitor
The Air Check O2 monitor is a compact, easy-to-install unit designed for use in confined spaces where inert gases might accumulate. The monitor is recommended for use in gas-storage areas, freezers, and other locations where low oxygen levels may pose a dangerous asphyxiation hazard. Unlike traditional electrochemical sensor cells, the monitor features a current-limiting zirconium oxide oxygen sensor that will operate continuously for more than 10 years with little or no maintenance. It responds to low oxygen conditions within seconds and provides drift-free oxygen readings in areas where temperature, barometric pressure, and humidity levels are variable. The monitor is suitable for both indoor and outdoor applications. Air Liquide America Specialty Gases LLC ( Plumsteadville, Pa.). 


pH sensor
The S8000 Modular pH Sensor Platform is designed for consistent accuracy in harsh environments. The sensor cartridge features rugged Ryton ® (PPS) parts and Viton ® seals in a chemically resistant body. Because of its flat-surface, self-cleaning technology, little maintenance is needed. The sensor electrode measures a pH range from zero to 14 (zero to 12.3 pH with low sodium ion error) at a pressure range of zero to 100 lb/in.2 (gauge) derated under temperature. The optional ORP Redox Electrode measures –1000 mV to +1000 mV, and the optional HF-resistant pH electrode measures zero to 12 pH at 0 °C to 50°C. Sensorex (Garden Grove, Calif.). 


The redesigned Enterprise Aspirating Mixer provides a more energy- and cost-efficient option for aerating and mixing. The retooled unit produces increased airflow, pumpage rate, and thrust and is designed to be easy to install. The mixer uses a high-volume axial-flow propeller pump design that operates within a close tolerance throat. The water propelled from the throat and forced through a specially designed venturi nozzle more than doubles the velocity of the fluid pumped, causing a low-pressure area to occur at the air intake. The mixer is available in 1-, 2-, and 3-hp, 230-V, 1 phase; or 1.5-, 2-, and 3-hp, 230-V or 460-V, 3 phases. There are no long shafts to keep in balance or outboard bearings to replace. Air-O-Lator Corp. (Kansas City, Mo.). 


PCB terminal blocks
The 804 Series push-button PCB terminal blocks provide jumper-free commoning to support manufacturers exporting LED devices and industrial electronics. The series also provides tool-free, PUSH WIRE® terminations for solid and ferruled conductors AWG 28–12. The terminal blocks feature an integrated test port and provide marking via optional self-adhesive marker strips or custom, direct printing. The push-buttons simplify insertion/removal for fine-stranded conductors, and enable easy removal of all conductor types. The CAGE CLAMP® spring pressure technology resists vibration, corrosion, and thermal cycling. The units are available in 5-mm (two to 16 poles) or 7.5-mm (two to 12 poles) pin spacing. WAGO (Germantown, Wis.). 


Resistant adhesives
MasterSil 153 two-component silicone adhesive features easy handling with a 1:1 mix ratio by weight, and its paste consistency enables precise application. The silicone has a low exotherm and working life of 5 to 7 hours at room temperature. It is a self-priming system, which bonds to many similar and dissimilar substrates, including most metals, plastics, glass, ceramic, and cured silicone rubber. It also is serviceable from –65°F to more than 400°F. The silicone can withstand severe thermal cycling, as well as vibration and mechanical shock. If stored in its original containers, it has a shelf life of 6 months. Available in various package sizes. Master Bond Inc. (Hackensack, N.J.). 


Tilt float switches
This expanded line of tilt float switches is designed to meet various large-volume liquid-level applications. The switches feature a watertight molded rubber float with integral three-conductor cable. Three different configurations enable the user to choose the right style for the application at hand. The switches are ideal for open vessels, wastewater tanks, sumps, pools, and ponds. Each float is constructed of durable EPDM for long service life and resistance to heat, oxidation, ozone, and weather aging. The switches contain an 8-A (250-VAC) microswitch on an antivibration mount. The SPDT switch element can be connected for either “open” or “closed” contact configurations and can measure both increasing and decreasing levels. The resulting signal can be used to start or stop a pump, open or close a valve, or actuate indicator alarms, as required. Madison Co. (Branford, Conn.). 


Gas detector
The lightweight, highly configurable Ventis MX4 multigas detector is capable of detecting one to four gases, including oxygen, methane, and any two of the following toxic gases: carbon monoxide, hydrogen sulfide, nitrogen dioxide, and sulfur dioxide. The detector can be configured with methane, carbon monoxide, and oxygen sensors for everyday mining applications; with the addition of the nitrogen dioxide sensor, it becomes well-suited for mines using diesel equipment. Industrial Scientific Corp. (Pittsburgh). 


The Recharger® 900HD detention/retention chamber measures 9.25 ft long × 78 in. wide × 48 in. tall. It features a bare-chamber storage capacity of 123.34 ft³/unit and a minimum installed storage of 190.73 ft³/unit. The systems are constructed with the tallest available chambers, which enable customers to use fewer units to achieve the needed storage volume, require less labor, and reduce the cost per cubic foot. The recharger is ideal for replacing large-diameter pipe, stacked, or crate systems and allows for additional site development. The recharger features the company’s side portal internal manifold feature and works together with HVLV FC-24 feed connectors to enable manifolding to take place at any point within the system for maximum design flexibility. Each unit can accept up to a 24-in.-diameter pipe into its end wall to manage greater flow rates. CULTEC Inc. (Brookfield, Conn.). 


Signal sensor
The ZSSC3026 sensor combines high-accuracy amplification, 16-bit precision analog-to-digital conversion, and an 18-bit DSP for linearization and calibration functions. The sensor provides special features for battery-driven, low-power devices. Designed initially for high-resolution altimeter module applications, it is ideal for use in any device that requires high accuracy and low power consumption. The sensor is suited for applications in mobile devices and supports industrial and medical applications. Zentrum Mikroelektronik Dresden AG (Dresden, Germany). 

Editor’s note: WE&T assumes no responsibility for claims made in product descriptions. Interested companies should send press releases and photos to prods@wef.org.