Odor Control And Disinfection

Odor control is essential to ensuring that wastewater treatment facilities remain good neighbors. Disinfection is essential to protecting public health. Here are some of the latest technologies in both product areas.
Odor Control And Disinfection
Q45S odor-monitoring system from Analytical Technology

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Activated Carbon Systems

Odor-absorbing activated carbon

AddSorb OX30 activated carbon from Jacobi Carbons controls odors such as hydrogen sulfide, mercaptans, methyl sulfides and VOCs from air emissions. Made from sustainable raw materials as an extruded pellet, it has high H2S-capacity product while maintaining VOC adsorption capabilities. The pelletized form affords a low pressure drop and is free of chemical impregnants, ensuring thermal stability in sensitive applications. 215/546-3900; www.jacobi.net.

Powder-activated carbon feeder

The VF-100 powdered activated carbon (PAC) feeder from Eagle Microsystems is constructed of stainless steel and uses a direct drive. It can be optimized for any PAC application with options like dust collectors, flex-wall agitation, explosion-proof motors, wetting cones, solution tanks, flow-pacing control, extension hoppers, and multiple screw and motor ranges to accommodate any feed rate. The chemical feed rate is controlled by electronic SCR speed control. 610/323-2250; www.eaglemicrosystems.com.

Aeration Equipment

Aeration units

Venturi Aeration units not only oxidize sulfides into non-odorous sulfate, but condition organic materials while in the collection system. A side stream entering a lift station in the collection system is pumped through an aerator device and discharges a highly aerated wastewater back into the lift station. The unit breaks up clumps of organic materials, making them more bioavailable for digestion; degasses organic solids oxidizing hydrogen sulfide; scrubs corrosive H2S in the headspace of the wetwell; adds dissolved oxygen to begin reducing BOD prior to the headworks; and strips CO2 buffering pH in relation to alkalinity present. 603/635-8239; www.venturi-aeration.com.

Biofiltration

Biofiltration system

The Compact Monafil zero-energy biofiltration system from Anua uses specialized media to remove odors, VOCs and sulfur- and nitrogen-based compounds. The properties of the granular, high-density peat media help achieve high-performance removal and extended media life. It uses recycled shell-based media to maintain a neutral pH within the prepackaged biofilter. The peat and shells ensure optimal odor control while simplifying operation and enhancing reliability. 800/787-2356; www.anua-us.com.

HEPA filter packs

HEPA filter packs from HEMCO Corporation collect particulate contaminants from the exhaust air stream. They remove 99.999 percent of particulate 0.3 micron and larger. The filter pack housing has a hinged access door with gaskets and spring latches for easy filter change. Inlet and outlet plenums with duct connection collars are installed. Packs can be paired with a carbon filter pack to remove chemical fumes and odors. 800/779-4362; www.hemcocorp.com.

Biotrickling filter

Biotrickling filters from BioAir Solutions offer a biological process that utilizes engineered, structured synthetic media to provide an optimal environment on which biological microorganisms can attach and grow to help remove both organic and inorganic odorous compounds. All odorous compounds are degraded and converted naturally and autonomously by the microorganisms present within the system. The drain discharge can usually be blended with other wastewater sources present at the site. 856/258-6969; www.bioairsolutions.com.

Biological air treater

The Biological Air Treater (BAT) system from Purafil provides efficient and cost-effective odor abatement with effective hydrogen sulfide and VOC treatment. Its dual-phase bio-support structure prevents plugging and channeling, providing a low pressure drop and requiring minimal maintenance. The technology includes a fully optimized and tunable support structure, providing wetting characteristics, predictable mass transfer and air distribution, and high loading and removal capacities. The fixed-film biotrickling filter technology is effective and economical in varied applications. 770/662-8545; www.purafil.com.

Compact biofiltration system

Biofresh Biofilter systems from PRD Tech are capable of removing sulfur, organic-sulfur, organic-nitrogen and volatile organic compounds. They have a compact footprint and synthetic media with high surface areas and are guaranteed not to cause increases in gas-phase pressure drop for at least 10 years. The polishing media lasts for at least 10 years. 513/673-3583; www.prdtechinc.com.

Chemicals

Chemical odor-removal pouch

Smelleze reusable chemical odor-removal pouches from Imtek Environmental Corp. remove a wide variety of treatment plant odors on contact without emitting chemicals. Place the reusable pouches near odors, in scrubbers and in air-handling systems. They are nontoxic, reusable, recyclable, natural, odorless, nonflammable and noncaustic. The product contains no VOCs and no harmful or ozone-depleting chemicals. 888/866-6367; www.noodor.com.

Concentrated membrane-cleaning solution

Micro-90 concentrated membrane-cleaning solution from International Products Corp. is free of solvents, phosphates, silicates, borates, halogenated compounds, phenols and substances of very high concern. It eliminates multiple-step cleaning cycles, and the concentrated liquid formula dilutes easily. A basic cleaning solution of 0.5 to 2 percent cleaner in water is a recommended starting point. Up to 10 percent may be required for severely fouled surfaces. It is noncorrosive and nonflammable and has low VOCs when used at suggested dilutions. It is registered with NSF as category A1 for use in food processing areas. 609/386-8770; www.ipcol.com.

Biodegradable odor-absorbing chemicals

Ecosorb biodegradable odor-control solutions from OMI Industries use a blend of natural ingredients to neutralize odorous molecules. They can be incorporated into existing systems or delivered via methods that include atomization, vaporization and spray. Sales engineers can accurately assess odors and propose a treatment plan using product only or a combination of product and equipment. 800/662-6367; www.omi-industries.com.

Odor neutralizing solution

C-5 Odor Neutralizer from Martech Research can be used to control noxious odors and H2S gas. It uses a formulation of natural botanicals, enzymes and microbes to change the biochemical pathways that lead to the formation of odors, destroying them at the source. It can be used in liquid or a slow-release block to control odors in a wide range of wastewater collection and treatment settings. It is biodegradable, nontoxic and nonhazardous. 803/428-2000; www.martechresearch.com.

Chlorine/Chlorinators

Chlorine gas feed valve

The Regal Smartvalve from Chlorinators Incorporated allows operators to apply the exact amount of chlorine needed to accommodate changes in water flow and quality. It can be used with a gas chlorinator to apply residual-only control or compound loop control schemes. A chlorine residual analyzer measures the chlorine level and provides feedback to the Smartvalve, which then compares the measured chlorine residual to the desired residual and, if necessary, adjusts to the chlorine gas feed rate. Residual-only control is used on a system that has a constant water flow rate with variable quality. 772/288-4854; www.regalchlorinators.com.

Chlorine dioxide solution

Endimal SH chlorine dioxide from DuPont Clean Water Technologies is a blended solution formulated to destroy odor-causing pollutants in wastewater treatment systems. It selectively reacts with sulfide compounds and as such requires a low dose, making it economically attractive. Because its oxidizing performance does not change with pH levels, it provides high sulfide removal efficiencies. It reduces corrosion, discharges no harmful byproducts, has an easily adjusted dosage to meet changing demands and is easily incorporated into dewatering techniques. 800/477-6071; www.chlorinedioxide.dupont.com.

Covers/Domes

Container cover system

The LEVEL LODOR container cover system from JDV Equipment Corporation helps reduce operator time and the building footprint, while limiting plant odors and solids exposure and providing efficient leveling of solids. The system has a low power requirement, stainless steel construction and standard safety devices. The fully automated system levels biosolids in roll-off containers to save time and handling. It protects dried solids from exposure to weather. 973/366-6556; www.jdvequipment.com.

Continuous bag system

The Longofill continuous bag system from Paxxo can connect to the discharge point of machines used to move, dewater or compact screenings, grit and biosolids. Material is then deposited in a 90-meter-long continuous bag for odor containment and spillage control. The cassette bag is easy to seal, and the material and odors are trapped inside, cutting down development of bacteria and fungus spores. 770/502-0055; www.paxxo.us.

Detection Equipment

Odor-monitoring system

The Q45S odor-monitoring system from Analytical Technology allows measurements at the inlet to scrubber systems where concentrations can run as high as 200 ppm, or at the outlet where concentrations are ideally below 0.5 ppm. Special sensor configurations are available for duct insertion or flowcell use. Because systems often monitor gas streams with condensing levels of water vapor, provision is made to eliminate water droplets from the sensor that could impede the diffusion of H2S. An optional air-purge system controlled by the transmitter periodically delivers a blast of air across the critical sensor surfaces to remove water droplets. 800/959-0299; www.analyticaltechnology.com.

pH and ORP transmitter

The compact, modular Type 8202 transmitter from Burkert Fluid Control Systems measures the pH or ORP value of fluids. It houses a replaceable and standard 120 mm pH or ORP probe screwed in a sensor holder with a PT1000 temperature sensor. Customers can use any standard pH electrode, and the transmitter has integrated PT1000 temperature sensors for required temperature compensation. The electronics can transmit both temperature and the desired analytical value simultaneously. The backlit programmer/display does not need to be left in the device. 800/325-1405; www.burkert-usa.com.

Web-based odor detection platform

The OdoWatch Web-based software platform from Odotech measures and tracks odors and gases in real time. It can provide odor audits and studies, citizen observations, and odor and gas dispersion modeling. It offers real-time odor plume and state-of-the-art odor management that can be accessed through an Internet connected smartphone, tablet or computer. It can track and measure several gases and odors, at once or separately. The system alerts operators when odors approach threshold values, enabling them to respond before a problem occurs. 514/340-5250; www.odotech.com.

Gas storage control module

The iTrans 2 Stand-Alone control module from Oldham can be mounted outside the door of chlorine cylinder storage areas with single- or dual-remote chlorine sensors mounted inside, providing a warning before anyone enters the areas. It can be used at remote lift pump/wet well stations where it is mounted on the control panel outside the pit. The H2S and combustible gas sensors are remote-mounted in the well, providing localized monitoring and warning when gas levels in the well reach hazardous levels. 713/559-9280; www.oldhamgas.com.

Electronic adsorbent media monitor

The Electronic Bed Monitor (EBM) from PureAir Filtration gives live readings of adsorbent media consumption in odor-control systems. It measures the carbon/adsorbent media consumption, and transmits the information via wired or wireless technology. An alarm message provides alerts before full consumption, allowing action to be taken before odor starts breaking through. 678/935-1431; www.pureairfiltration.com.

Single-parameter colorimeter

The waterproof, hand-held Lovibond MD 100 single-parameter colorimeter for chlorine analysis from Tintometer can test two ranges of free and total chlorine. It can test for a wide range of water-quality parameters, and can be used in the field or laboratory. 941/756-6410; www.lovibond.us.

Gas detection digital Modbus RTU controller

The TA-2016MB-WM gas detection wall-mount controller from Mil-Ram Technology has a 16-channel system (eight-channel available) using an RS-485 Modbus RTU multi-drop sensor network. It has low/mid/high/fault relays (SPDT rated 10 amp), LED alarm indicators, local buzzer and backlit LCD auto-scrolls for channel data/fault conditions. An auto-configuration wizard makes channel configuration simple and automatic. It can be installed at any point on the RS-485 network, eliminating long wiring runs. 510/656-2001; www.mil-ram.com.

Personal four-gas monitor

The RKI GX-2009 four-gas monitor from Scantek weighs 4.6 ounces and fits in the palm of a hand. It simultaneously monitors and displays combustibles, oxygen, carbon monoxide and hydrogen sulfide. It has dual audible alarm ports and alarm LEDs on three sides so that alarm conditions are obvious in high-noise environments. It has a waterproof and dustproof design with IP 67 rating, impact- and RFI-resistant rubber over-mold body and a large-capacity data logging system. Also included are vibration alarm, autocalibration, calibration lockout or reminder control, STEL/TWA readings, peak hold, and auto backlighting at alarm on a large LCD display. It is operated through two simple glow-in-the-dark, glove friendly buttons. The NiMH battery operates for 20 hours and fully charges in three hours. 800/224-3813; www.scantekinc.com.

Ozonation Equipment/Systems

Ionized air odor-control system

The CSO Technik Terminodour odor-control system, distributed by Kusters Water, division of Kusters Zima Corp., neutralizes odors by supplying ionized air into the building, where it reacts and oxidizes odors while maintaining a healthy working environment for operators and reducing corrosion. It uses no water, chemicals or media, minimizing capital and operational costs. 864/576-0660; www.kusterswater.com.

UV Disinfection Equipment

UV disinfection range

The PureLine UV disinfection range from Aquionics provides chemical-free disinfection of water, syrups and brines in the food, beverage and brewing industries. It includes standard models for almost any food and beverage processing application, including deozonation, dechlorination and TOC reduction. It includes third-party-validated and performance-qualified models for stringent disinfection applications. Units are easy to install. Maintenance is simple and can be carried out by on-site personnel. 800/925-0440; www.aquionics.com.

Open-channel UV system

The Duron open-channel UV disinfection system from WEDECO – a Xylem Brand eliminates chemical-based disinfection. Its small footprint includes a 45-degree vertical incline design combined with a vertical lamp arrangement. It uses energy-efficient 600-watt Ecoray lamps and ballasts, minimizing the number of lamps required. 704/409-9700; www.wedeco.com/us.

Complete UV system

Multiplex Systems from UV Pure Technologies offer Crossfire technology that includes automated self-cleaning quartz sleeves, air-cooled bulbs and dual smart-sensors that measure UV intensity and UV transmittance and actively calculate  and display UV dose. Systems are preconstructed, parallel assemblies mounted in NEMA 4X cabinets for flows up to 120 gpm and fabricated on stainless steel manifolds for flows from 120 to 720 gpm. Preconstructed assemblies reduce installation time and cost and require minimal training.  888/407-9997; www.uvpure.com.

UV transmittance monitor

The Real UV254 M1500 probe from Real Tech provides accuracy and reliability in open-channel or nonpressurized wastewater UV disinfection applications. It monitors UV transmittance (UVT) between 15 and 100 percent. The optional Real Controller is a wall-mounted operator interface that allows for convenient control and display. Real Air Clean systems provide automatic air cleaning to improve performance and lower maintenance. The 4-20 mA output links real-time UVT measurements with the operator or UV reactor to enhance treatment goals while saving operator time and money. 877/779-2888; www.realtechwater.com.

Package water treatment plant

The Trident HS package water treatment plant from WesTech Engineering provides multi-barrier protection for difficult-to-treat surface water, groundwater, industrial process water and tertiary wastewater. It consists of packaged high-rate settling, adsorption clarification, mixed-media filtration and optional UV disinfection. It handles high raw-water turbidity and solids loading and achieves TOC reductions that can exceed 70 percent. 801/265-1000; www.westech-inc.com.   



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