Disinfection

Click here to enlarge imageChlorine dioxide disinfectionVulcan Performance Chemicals provides chlorine dioxide systems for effluent disinfection. The Rio Linda™ generators combine sodium chlorite with either chlorine gas or sodium hypochlorite in a vacuum-operated mechanism to generate chlorine dioxide on site. Chlorine dioxide will not produce chlorinated by-products. It is faster acting than chlorine and is effective over a wide pH range. The company's representatives offer expert advice on chlorine dioxide chemistry, and can help to design a system for specific applications.Vulcan Performance ChemicalsBirmingham, ALTel: 800-474-4086Web: www.vul.com

Click here to enlarge imageWater disinfectionUV disinfection depends on lamp output. Although fluorescent UV lamps have a long life, they will degrade with time and as bulb contamination occurs. Monitoring lamp output with Solar Light Co.'s GLM10, a stable, calibratable UV detector, assures lamp efficacy. The GLM's one-piece design for both readout and detector suits it to operate in a pressurized water environment. Percent of initial lamp intensity is read on an LED. When lamp output drops to 60%, a low-level indicator light turns on and a power relay trips to initiate any other alarm or desired control device. When UV intensity rises above the low-level set point, the alarm indication is automatically removed.Solar Light Co., Inc.Philadelphia, PATel: 215-927-4206Web: www.solar.com

Click here to enlarge imageResidual chlorine measurementThe AccuChlor system from GLI International uses an EPA approved amperometric measurement technique to provide free or total chlorine measurements. The unique construction of the measuring cell provides stable and repeatable measurements from extremely low ppm ranges to as high as 50 ppm of free or total chlorine. This system uses ordinary 5% food grade distilled white vinegar for pH adjustment. In addition to being extremely inexpensive, distilled white vinegar prevents fouling by cleaning the sensor's flow cell, and is readily available, non-toxic, and non-hazardous.GLI International, Inc.Milwaukee, WITel: 414-355-3601Web: www.gliint.com

Click here to enlarge imageElectrochlorinatorsPepcon Systems' ChlorMaster electrochlorinators provide on-site sodium hypochlorite generation for use in a variety of applications including potable water chlorination, wastewater disinfection, and odor control systems. As a custom equipment manufacturer, the company can provide an electrochlorination system to meet specific project objectives. It has been designing electrochlorinators for more than 30 years. The company's Bipolar Model Cell offers an electrode plate design that features high current efficiency, low power consumption, and compact system design.Pepcon SystemsCedar City, UTTel: 435-865-5045Web: www.pepconsystems.comSwitchover systemRegal™ has introduced a system for uninterrupted, unattended service for chlorinators, Sulphonators and ammoniators. The SAVS™ system (Self-sustained automatic vacuum switchover) has built-in, corrosion-proof and permanently adjusted switchover latches and reset knobs.Chlorinators Inc.Stuart, FLTel: 561-288-4854Web: www.regalchlorinators.comBriquette chlorinatorThe Constant Chlor Plus Briquette Chlorinator is designed to deliver a consistent dose of available chlorine for disinfection applications. The chlorinator can supply up to 62 lbs. Of AvCI2/day. It uses solid dry calcium hypochlorite briquettes. The reservoir is filled with an approximate 1.5% available chlorine solution via an electronically controlled spray manifold.HTH Water ChemicalsKennesaw, GATel: 800-432-7223Web: www.archwaterworks.com/municipal

Click here to enlarge imageUV systemThe new Ultra Guard® UV System provides disinfection of wastewater effluents at significantly lower costs. A high efficiency, low pressure, ultra-high-intensity UV lamp produces the highest germicidal output on the market. When combined with the patented, modular Single Lamp Reactor (SLR) chamber, which induces turbulence for increased effluent exposure to the UV lamp, the result is maximum disinfection with fewer lamps. Together with automatic dose pacing, this means less power and less maintenance for cost savings.USFilter Wallace & Tiernan Prod.Vineland, NJTel: 856-507-9000Web: www.wallaceandtiernan.usfilter.com

Click here to enlarge imageChlorine measurementThe Liquisys CUM 223/253 from Endress+Hauser is a modular controller that can be adapted to a wide range of needs, including chlorine/ chlorine dioxide measurement. Input is provided from the CCS 140/CCS 141 free chlorine sensor. The basic version provides simple measuring and alarm signaling functions, and can be equipped with software and hardware modules to match specific applications. Expansion modules can be retrofitted. Available with NEMA 4X field mounted controller or panel mounted housing, one instrument can handle both chlorine/chlorine dioxide.Endress+Hauser Inc.Greenwood, INTel: 800-428-4344Web: www.us.endress.comOn-site disinfectionClorTec On-Site Sodium Hypochlorite Generation systems from Severn Trent Services range in capacity from 2 up to 2,000 ppd of chlorine equivalent disinfection. The line also includes the ClorTec SAN2 and SAN6 portable generation units for disinfecting water in isolated, rural areas.Severn Trent ServicesDallas, TXTel: 408-871-1300Web: www.severntrentservices.com

Click here to enlarge imageUV disinfectionAquionics offers a UV disinfection system called Aquionics Inline. The system can be designed for disinfection of primary, secondary, and tertiary treated effluents as well as combined sewer overflows and stormwater. The system is compact and simple to install. Series and parallel configurations can be provided to handle any size flow or disinfection permit.Aquionics Inc.Erlanger, KYTel: 800-925-0440UV disinfectionEach Aquaray 40 HO VLS module from ONDEO Degremont houses 40 low-pressure, high-output vertical UV lamps. A staggered lamp array creates a semi-tortuous path so organisms encounter multiple barriers at the most intense point of contact. Flow baffles increase turbulence, which aids disinfection, and the baffles also direct flow away from the walls and into the UV lamp field. Lamp row-by-row flow pacing increases lamp life and conserves energy. An on-board computer electronically monitors individual lamps. Maintenance is minimal.ONDEO Degremont, Inc.Richmond, VATel: 804-756-7600Web: www.ondeo-degremont-usa.comColorimeterPalintest has introduced a new dual-range colorimeter for on-site measurement of chlorine dioxide in water. The Chlordiox Duo instrument is designed for bench use in laboratories and for field use. It measures chlorine dioxide in just one minute and requires no technical knowledge. Chlorine dioxide is measured within a low or high range: 0 - 2.5 ppm or 2.5 - 20 ppm. A reagent tablet is first dissolved in a water sample. After the sample is inserted in the meter, a single button press produces measurements in parts per million displayed on a 0.5 in. LCD screen.Palintest USAErlanger, KYTel: 800-835-9629Web: www.palintestusa.comUV disinfectionThe Trojan UVSwift™ disinfection system for municipal drinking water features a flow-through reactor that was designed to provide a small footprint and low headloss. The system's medium pressure lamps operate at a higher intensity than conventional low-pressure lamps, and it therefore requires fewer lamps to achieve disinfection targets. The system's output can be varied as water quality or flow rates change. It offers lamp cleaning options including simple manual cleaning, an automated mechanical process or an automated physical and chemical cleaning process for more demanding conditions. The system also features an automated monitoring and control system to minimize the need for operator intervention.Trojan Technologies Inc.London, OntarioTel: 519-457-3400Web: www.municipal-water.comTablet chlorinationHammonds has introduced a new tablet water chlorination system. The new off-the-shelf system offers a "plug and play" design that does not require custom engineering. The system uses a magnetic stir bar and motor to create a vortex in a small water chamber. The vortex creates positive and negative pressures allowing for recirculation of the solution, making it possible to vary solution strength without changing flow through the system. The chlorinators use PPG's three-inch calcium hypochlorite tablets to produce a consistent solution that can be injected at controlled rates into the water supply. The system uses 2 gpm of water and just 10 amps of standard 110 vAC.HammondsHouston, TXTel: 800-582-4224UV GuidelinesThe new book "Ultraviolet Disinfection Guidelines for Drinking Water and Water Reuse" is intended to provide guidance to regulatory agencies who review applications for the use of UV disinfection systems for drinking water and water reuse. The book is also intended for water utilities considering the use of UV technology. It includes protocols for testing and validating UV equipment performance. The book is offered by the National Water Research Institute and the American Water Works Association Research Foundation and will be available for purchase Winter 2001. Copies can be reserved at this time.The Ntl. Water Research Inst.Fountain Valley, CATel: 714-378-3278Biological controlBroad spectrum, non-oxidizing biological control agents can be used to inhibit bacterial growth and slime buildup in all types of membranes and membrane systems, including thin-film polyamide, polysulfone and PVDF. BetDearborn's BioMate™ products remove accumulated biofouling products to increase permeate flow and reduce biofilm formation. EPA registered and designed for use in water-based applications, they are effective in both on- and off-line treatment programs for continuous and intermittent sanitizing of systems and membranes.BetzDearbornTrevose, PATel: 215-953-5524Web: www.betzdearborn.comOnsite generatorsMiox on-site generators for water disinfection use only salt, water and electricity to create a mixed-oxidant solution, thus improving plant safety and eliminating the need for Risk Management Plans, HAZMAT training, and other safety procedures. Mixed oxidants also typically reduce TTHM formation by 30% to 50%, clean biofilm from the distribution system, and leave a more durable chlorine residual than that left by gas chlorine. Users report maintenance requirements of no more than 1-2 hours per week.Miox CorporationAlbuquerque, NMTel: 505-343-0090Web: www.miox.com

Click here to enlarge imageCalcium hypochlorite systemPPG's Accu-Tab® System consists of 3-inch calcium hypochlorite tablets with 65 percent available chlorine and patented erosion chlorinators. The chlorinators have no moving parts or small openings to clog and eliminate the need for metering pumps. The new PowerPro™ chlorination unit incorporates the patented Accu-Tab chlorinator. A portion of the process water, whether potable or wastewater, is diverted through the chlorinator. The water flow erodes the tablet, with the amount of chlorination being controlled by the inlet water flow. The chlorinated water is then returned and mixed in with the process stream.PPG Industries, Inc.Pittsburgh, PATel: 800-245-2974Web: www.ppgaccu-tab.comDry pellet chlorinationThe Autotrol line of chlorinators from Osmonics uses dry pellet chlorination to eliminate iron waterborne diseases and contaminants, as well as iron bacteria and hydrogen sulfide gas. The systems reduce clogged well pumps, iron-stained sinks and appliances, bad water taste and rotten egg smell, slime buildup in tanks, black water and algae. The company's Well Sanitizer™ pellets are applied directly to wells. They are semi-soft, fast dissolving and small enough to pass through small restrictions in wells.Osmonics Corp.Minnetonka, MNTel: 952-933-2277Web: www.osmonics.com

Click here to enlarge imageUV disinfectionSuntec Environmental has released the new LPX500, a high output, low pressure, parallel flow modular UV disinfection system. The system uses low pressure, high intensity lamp technology for energy savings. Its submerged, high frequency ballasts (capable of variable output) provide effective "cooling by configuration," thereby reducing the overall size of the system and increasing its reliability. The package includes an advanced communications system. The Scrapper™ automatic cleaning system eliminates the need for manual cleaning.Suntec EnvironmentalConcord, OntarioTel: 905-669-4450Web: www.suntecuv.com

Click here to enlarge imageValve acutatorsRobo-Control manufactures battery operated actuators to remotely open and close hazardous gas cylinder valves such as chlorine and sulfur dioxide. The actuator is designed to mount to the valve without interfering with existing hardware or dispensers. The actuator will communicate with an RTU or PLC for SCADA or in-plant control. Integral leak detection is an option. Each actuator has integral digital display to show actual valve position. Recent additions include a security output option to indicate actuator removal from a cylinder.Robo-Control Inc.Bridge City, TXTel: 409-697-2666Web: www.robo-control.comEmergency shut-offHalogen Valve Systems' emergency shut-off system for either chlorine cylinders or ton containers mounts to existing valves without special tools. The valve may be manually opened or closed while the actuator is in-place. The actuator will close a chlorine valve in less than one second in response to sensors and remote switches. This "automatic-closing fail-safe valve" system is a close-only device that is outlined for use in the new Fire Codes.Halogen Valve SystemsIrvine, CATel: 949-261-5030Web: www.halogenvalve.comChlorine dioxide generatorThe ProMinent Bello Zon chlorine dioxide generation process uses repeatable diaphragm metering pumps to deliver components through a reactor vessel, directly into the water stream. Output may be automatically controlled in proportion to water flow, or by a ProMinent chlorine dioxide residual controller to maintain a set concentration during varying demand and flow. The Bello Zon CDKa chlorine dioxide generators use 25% standard sodium chlorite, 30% hydrochloric acid and water in a 1:1:5.4 ratio for medium to large capacity applications.ProMinent Fluid Controls, Inc.Pittsburgh, PATel: 412-787-2484Web: www.prominent.ccAutomatic valveHydro Instruments had released a new automatic valve for flow proportioning, residual control or compound loop control of vacuum gas chlorination and sulfonation systems. The Hydro Automatic Valve is enclosed in a NEMA 4X enclosure with a compact design. It is microprocessor based, keypad controlled and has an alphanumeric, two-line, 20-digit display. The display will indicate gas flow in four different units (%, PPD, gr/h and kg/hr). In any control mode, the valve can be switched to manual control where gas feed rate can be set through the keypad interface. Dosage and residual set point are adjusted in the operation mode.Hydro InstrumentsQuakertown, PATel: 215-538-1367Web: www.hydroinstruments.comChlorinator/dechlorinatorThe H2O Neutralizer from Measurement Technologies is designed to offer cost effective dechlorination or chlorination of distribution systems or storage reservoirs. It requires no external power or injection pumps to operate. It attaches directly to a 2-1/2 in. MNST fire hydrant port, blow off assembly or fire hose using a 3 in. by 2-1/2 in. FNST Type "A" adapter. The Full Flow Hydrant Diffuser (HD-301) attaches on the discharge end, or alternatively, a 20-ft. discharge hose. The feed solution, such as ascorbic acid for dechlorination, is introduced into the water by a controlled vacuum-induced feed line solution.Measurement Technologies, Inc.Sammamish, WATel: 425-868-8511Packaged ozone systemGDT Corp. has introduced packaged, skid-mounted ozone treatment systems for water disinfection and oxidation. The patented GDT™ gas transfer process is at the core of the system. Typically used in a side stream configuration, the modular system can support small and large-scale treatment applications. In the process, high efficiency Mazzei® injectors aspirate ozone gas from a generator providing dynamic mixing and mass transfer. Dissolution is enhanced in a reaction vessel, determined for each application on the basis of feed gas and concentration, operating pressure, reaction rates and desired transfer efficiency.GDT CorporationPhoenix, AZTel: 623-587-8858Web: www.gdt-h2o.comGas detection systemEcometrics' Sensi-Chlor gas detector is a fast acting, fail safe detector for chlorine and sulfur dioxide gas. It covers the range of 0-30 ppm of gas in air. The device is housed in a compact IP65 rated case and features fully adjustable set points, audible and visual alarms and a full status display. The high-resolution transducer reacts quickly to changing levels of gas in the air.Ecometrics, Inc.Silverdale, PATel: 215-453-9800Web: www.ecometrics.com