Matching Flow to Demand
The energy-efficient Omega Frequency Control from Kaeser Compressors Inc. uses engineered frequency drives to get the most out of positive-displacement blower packages. The control continuously adjusts the blower speed, matching blower delivery to the actual process flow demand.
Units also offer enhanced controls through various signal inputs, outputs and a Profibus connection. They work with vacuum transducers, pressure transducers and dissolved oxygen sensors. Complete control systems include process follower, parameterizing, programming and interconnecting wiring. This cost-effective technology is on 10- to 335-hp packages. 800/777-7873; www.kaeser.com/omega.
Mixing Master
The Model AQX mixer from ACUMIX increases mixing capacity, minimizes tank floor space, and reduces shipping charges for chemical usage to replace ailing mixers or fill voids in flocculator trains. One unit mixes 4,000 gallons of magnesium hydroxide, 12,000 gallons of pH adjustment or neutralizer, 5,000 gallons of biosolids treatment (15,000 gallons if anoxic), 4,000 gallons of polymer used in day tanks, or 40,000 gallons flocculation with 16-foot-tall basin walls.
The quiet helical reductions are 96 percent efficient with an American Gear Manufacturers Association gear rating exceeding a 1.5 (24-hour day) shock factor. Statistical life of the bearings is more than 100,000 hours (11.4 years).
A compact, lightweight, heavy-gauge, corrosion-resistant housing with flexible motor coupling ensures alignment and absorbs inherent shock loads. The model uses high-pressure wash down class F-insulated energy-saving motors. Precision aligned in-tank or optional above-mounting base couplings provide easy installation. 800/683-2011; www.acumix.org.
Microwave Ultraviolet Technology
The MicroDynamics Series OCS 660 open-channel wastewater system from Severn Trent Services meets all dose, log reduction and water quality requirements. It disinfects using microwaves that energize low-pressure, high-output ultraviolet lamps.
The long-lived lamps have no electrodes, light instantly, and switch on and off to match flow. Disinfection is immediate. Quartz sleeves remain the same temperature as the water, leading to less fouling and higher overall reliability. Units have no electrical connections in the water or between the microwave generator and lamp assembly. 215/997-4000; www.severntrentservices.com.
Odor and Corrosion Control
The PRI-SC master program for hydrogen sulfide control from US Peroxide eliminates odor and corrosion problems by combining iron salts with hydrogen per-oxide in a synergistic fashion. The safer, more environmentally benign technology controls sulfides to very low levels, reduces solids loadings, accelerates reaction rates, lowers iron consumption, and enhances flocculation in the clarifiers.
The peroxide regenerated iron-sulfide control strategy is most effective in large, long-duration municipal wastewater collection systems characterized by high sulfide loading rates and atmospheric hydrogen sulfide problems. The company’s full-service program optimizes operational performance, provides measurable economic benefits, and integrates the collection system and plant. 877/346-4262: www.h2o2.com.
Clay-based Flocculants
RM-10 products from CETCO Oilfield Services Co. are a nonhazardous blend of sodium bentonite, pH- adjusting agents, polymers and other proprietary components that provide a safe, simple, cost-effective means for pretreatment and disposal of wastewater. More than 40 granular, semi-granular and powdered varieties are available. The formulas usually allow one-step removal of emulsified oils, heavy metals and suspended solids, ensuring that the treated effluent meets established discharge limits. 847/818-7917; www.cetcooilfieldservices.com.
No Membranes
The EPA-approved luminescent BOD system from Hach Co. delivers quick, reliable measurements and reporting with time and date stamp, and operator and sample identification. Once calibrated, the units seldom need adjusting. They have no membranes, and no electrolyte to replace or anode to polish. Probes have a one-year sensor life, and the integrated motor-less stirrer is simple to replace. 800/227-4224; www.hqdmeter.com.
Mixing System
The Depth Charge from Precision Systems automatically scours lift stations before every pump cycle, preventing fats, oils and grease from damaging level controls or clogging pumps. The system resuspends solids by injecting a small volume of high-pressure air into the wet well immediately before the pump activates. The resulting turbulence mixes solids with water, then the energized pump removes them.
The unit has no moving parts, just injector bands mounted on the wall to minimize interference with other station components and increase the effectiveness of the injected air. The device works with any brand or type of pump. 708/891-4300; www.precision-systems.com.
Energy-Efficient
Ceramic Repair Putty from Devcon repairs or rebuilds worn or damaged process equipment quickly and economically by forming a smooth, long-lasting barrier against abrasion, corrosion, cavitations and chemical attack.
The durable alumina-filled epoxy reduces pump friction and energy consumption, while increasing water flow. Easily applied, it fills voids and improves the performance of pump casings, impellers, suction plates, tube sheets, heat exchangers, condensers, water boxes, valves, chutes, tanks, hoppers, fan housings and more.
The putty’s 100-percent solids formulation produces no volatile organic compounds emissions. Non- sagging, it covers 66 square inches per pound at a thickness of 1/4 inch. Pot life is 25 minutes, and functional cure takes 16 hours at room temperature. When cured, it withstands service temperatures of 150 degrees F wet, 350 degrees F dry. The putty qualifies under military specification DOD-C-24176B(SH) Type I. 800/933- 8266; www.devcon.com.
