Fairmont, Minnesota, known as the City of Lakes, is located in Martin County in southern Minnesota. The city’s water treatment plant serves a mix of customers including approximately 3,900 residential taps, 500 commercial and 17 industrial customers. Looking to the future, Fairmont city leaders began to investigate upgrading the city’s water treatment plant in 2010. The existing plant had been in operation for well over 70 years and relied on gas chlorine for disinfection.
When the Cobb County-Marietta Water Authority (CCMWA) anticipated the need to upgrade the Hugh A. Wyckoff water treatment plant, they turned to granular activated carbon (GAC) technology after vetting several alternatives. The plant, a wholesaler in a two-plant system, processes up to 72 million gallons per day and serves about 350,000 people. Comprising of Wyckoff and the James E. Quarles treatment plant, CCMWA is the second largest water provider in Georgia.
A Southern U.S. municipality experiencing taste and odor issues in a certain neighborhood was also having difficulty maintaining chlorine residual levels in the area. Biological growth was suspected, however, water leaving the treatment plant met and exceeded all water quality requirements. After several investigations, the source of contamination in the distribution system could still not be identified.
In order to improve the efficiency of biofilm technologies, a high-performance biocarrier has been developed, based on requests for ideal carrier characteristics.
Combined with the installation of the new filter media and wash troughs, this particular type of underdrain and media retainer brought the water treatment plant’s operations up to speed.
In spite of the recent abundance of water, many of California’s aquifers continue to balance on the edge of water scarcity. Decades of overpumping have reduced the amount of ground water available to supplement surface water resources diminished by drought. The Pure Water Monterey Ground Water Replenishment Project (Monterey Pure), addressed the need to replenish a local aquifer, by piloting Advanced Water Treatment (AWT) processes, to determine the best method to convert secondary wastewater into a pure water resource.
The Hagerstown Wastewater Treatment Plant in Maryland incorporated several plant modifications, one of which was the conversion of their disinfection process from the use of ozone to UV.
The North Columbus Resource Facility recently completed a $12-million replacement of its settled water filtration, removing the existing Wheeler filters, their three-part media and 10-inch poured concrete underdrains, which were no longer efficient.
Installing and operating an ozone oxidation system for wastewater remediation at a gold mine located in a remote region of Alaska is full of challenges.
North Las Vegas has installed some of the largest rotary fine screens operating in the United States. The center feed drum screens are critical to protecting the membrane bioreactor, enabling the plant to maintain extremely low turbidity coming off their plant that is better than most potable water. Read how they are putting the ROTAMAT RPPS to work.
When Plainfield, IN, needed to double their permitted capacity from 2 MGD to 4 MGD at their South wastewater treatment plant, they faced a dilemma. Like most treatment plants, space is at a premium, and compact design was needed not only for the current expansion, including the addition of a post aeration structure, but to preserve as much room as possible for projected future expansions.
During the summer of 2015 the Waging WWTP in the Bavarian Chiemgau district was desperately looking for an energy-efficient, high-performance sludge thickening plant to replace the centrifuge they had been using. The objective was to optimize digester capacity, gas yield and sludge handling in the overall process on site. Read more about their successful implementation.
FiltraFast™ is a high-rate downflow gravity or pressure filter that uses a unique compressible media. The filter only uses hydraulic loading to create the required media porosity without any mechanical compressing devices. A proprietary backwash sequence enables maximum recovery, extends media life, and limits energy consumption. This process 1) significantly reduces the footprint compared to sand filters, and 2) reduces maintenance and replacement costs required by disc filters, and other compressible media filters.
Calgon Carbon UV Technologies is pleased to introduce the C3500D/PS Packaged System for UV Wastewater Disinfection. This product uniquely addresses the needs of smaller communities with effluent flows of less than 2.6 million gallons a day.
With 1,200 installations worldwide, De Nora Ozone offers a wide range of ozone systems, from small compact units to turnkey plants. Ozone is used for the treatment of municipal drinking water and wastewater; micropollutants; industrial wastewater and process water; advanced oxidation; pools and spas; and biological sludge reduction. Using the strongest natural oxidants, on-site ozone generation does not create a residual biological sub-product, offers quick reaction time, and requires no chemical compounds. De Nora Ozone systems maximize ozone concentration while minimizing energy requirements, working closely with the customer to a provide a tailor-made solution for individual needs. De Nora Ozone has the expertise to ensure you get the most effective technical solution through pilot plants, testing and scale units.
Pipeline Flash Reactors™ (PFRs or spool pieces) utilize high velocity mixing to transfer ozone or oxygen-enriched sidestreams into bulk water flow, all within a compact footprint. With a PFR, ozone or oxygen mass transfer occurs in the pipeline within seconds, eliminating the need for additional tanks or basins. Whether it is providing ozone for water purification or increased dissolved oxygen for wastewater, Mazzei’s PFR uniformly distributes gas into the water and minimizes the size and cost of gas contacting.
The GDT™ Process starts with the creation of ozone from an Ozone Generator. The ozone is then drawn into a Mazzei®Venturi Injector which provides dynamic mixing (a Back Pressure Control Valve adjusts injector outlet pressure optimizing ozone mass transfer in the system). Then mixing and contacting is enhanced in a Flash Reactor™. From there the two-phase flow travels to the Degas Separator (DS) & Relief Valve for additional mixing and entrained gas removal. And finally, the MTM Mixing Nozzles force dissolved ozone flow into the untreated water in the pipeline or basin for thorough mixing.
Huber Technology RoFAS Septage Station is designed to handle environments that would cause standard Septage Stations to fail. Easily processes large debris protecting headworks from unpredictable septage. Center feed allows for rapid offloading. Option for automatic hauler station. Revenue opportunities quickly realizes return-on-investment.
The AquaNereda® Aerobic Granular Sludge System is an innovative biological wastewater treatment technology that provides advanced treatment using the unique features of aerobic granular biomass. The unique process features of the AquaNereda system translate into a flexible and compact process that offers energy efficiency and significantly lower chemical consumption.
IMS Wet Emergency Chlorine Scrubber Systems are designed to contain and treat accidental releases of chlorine gas. Systems are offered to treat up to 3 tons of chlorine gas. The IMS wet emergency chlorine scrubber is a three-stage single-pass chemical absorption system with very high efficiency horizontal packed bed sections. An induced draft fan pulls the chlorine gas through the scrubber, where it contacts a recirculation caustic solution. The scrubber system is factory pre-assembled, complete with induced draft fan, recirculation pump, instrumentation and controls.
With 29 locations, 1,600 employees and research facilities in Japan, Italy and the United States, DeNora is one of the largest disinfection and filtration companies in the world. As Gary Lohse, Regional Sales Manager for De Nora, explains in this Water Online Radio interview, the acquisition of the former Severn Trent manufacturing division coupled with De Nora’s product innovation strength is driving enhancements to some of the most respected brands in the water industry.
In the early 90s, Bio-Microbics introduced membrane treatment technology, traditionally used in drinking water treatment plants, to the decentralized treatment market. In this Water Online Radio interview, Jennifer Cisneros, Director of Marketing for Bio-Microbics and Chair of the National Onsite Wastewater Recycling Association’s Marketing Committee, discusses the use of the onsite technology at an oyster bar where Total Kjeldahl Nitrogen (TKN) was about three times the level of ammonia.
Polymer activation through proper hydration of the polymer particle is critical in water clarification or sludge dewatering applications. According to Jeff Rhodes, Vice President of Commercial Development for UGSI Solutions, “the key is to have a high energy zone at the moment of initial welding, when the polymer and the water come together.”
Dissolved air flotation systems are ideal for removing suspended solids and emulsified oils from industrial wastewater streams because they work at high flows and can process high concentrations of contaminants. As Richard Newman, Director of Sales for SUEZ’s Gulf Coast Services, points out in this Water Online Radio interview, the treatment system is ideal for refineries and pulp and paper plants where suspended solids are not water soluble but emulsified.
Peracetic acid (PAA)-based disinfection is growing in the US, both as a standalone disinfection method and in conjunction with other applications such as UV. Water Online Radio sat down with John Maziuk, Technical Development Manager with Solvay Chemicals to understand why.
The era of dumping waste into rivers is almost over. So says Jon McClean, Chief Technical Officer with ETS-UV, an Evoqua brand. McClean who has been working in UV water treatment for over 30 years recently sat down with Water Online Radio to discuss the growth of water reuse and specifically UV’s role in water reclamation.
The newest family in the SUEZ ozone range, the ozonia® M includes all the latest developments from the ozonia® innovation labs. Ozonia® IGS+ dielectric technology provides even lower energy consumption and increased ozone production capacity up to 25 kg/h resulting in a lower cost per kg of ozone. The new ozonia® smartO3™ automation platform adds a suite of advanced features designed to optimize system performance and reduce operation costs. Finally, an innovative design provides improved resistance to environmental conditions in a more compact footprint.
Hach's breakthrough suite of software and connected instruments turns data into powerful operational insights. Watch this short video to see how Hach simplifies the complexities and brings clarity to water management.
The City of North Las Vegas’s treatment facility is a membrane bioreactor (MBR) plant that was brand new when Huber’s rotary fine screens were implemented as part of its new advanced treatment and reclamation process. The facility uses smart technology that enables 24-7 processing with 14 of its operational hours every day unmanned. Huber’s advanced fine screening technology plays a key role in this impressive and innovative technology lineup.
In the GDT™ process, high efficiency Mazzei® injectors aspirate ozone gas providing dynamic mixing and mass transfer. Dissolution is enhanced in a Flash Reactor™, sized for each application on the basis of feed gas concentration, operating pressure, reaction rates and desired transfer efficiency. After leaving the Flash Reactor, the contacted two-phase flow then travels to the patented degas separator (DS) and degas relief valve for additional mixing and entrained gas removal. And finally, the MTM Mixing Nozzles force dissolved ozone flow into the untreated water in the pipeline or basin for thorough mixing.
