The Upper Trinity Regional Water District (UTRWD) is a conservation district created by the State of Texas in 1989 to provide water, wastewater, solid waste and storm water services to numerous towns and cities approximately 50 miles northwest of Dallas. In 2010, the UTRWD installed three 2,000 pound per day (PPD) chlorine equivalent Microclor® OSHG systems. The systems continue to provide UTRWD with a reliable supply of hypochlorite for disinfection in a manner that is less expensive and less risky than gas chlorine or liquid bulk hypochlorite delivered via truck or rail through such a heavily populated area.
The existing water filtration facility in Clinton MA is a high rate, direct filtration process that has been on-line since 2006. The water filtration plant draws it raw water from the Wachusett Reservoir. Chemical feed systems are provided for chemically assisted filtration, pre-oxidation (potassium permanganate), coagulation, pH and alkalinity adjustment (sodium bicarbonate and sodium hydroxide), and disinfection (sodium hypochlorite).
Access to clean, safe, fresh water is one of the greatest challenges facing humanity in the 21st century. By some estimates over 1.5 billion people face water scarcity issues that directly threaten their health or economic welfare on a daily basis. More concerning, the impacts of climate change and global population growth are expected to exacerbate these issues to impact over 2.3 billion people by the year 2050. These sobering facts are why six of the United Nations (UN) Sustainable Development Goals (SDGs) are focused on providing access to clean, safe water. Part of solving this challenge is reducing industrial water consumption to conserve water resources.
Pilot testing was conducted to evaluate the relative performance of 4 filter media, including Ceraflow-50, as part of a reduction coagulation filtration (RCF) treatment process for the removal of hexavalent chromium (Cr(VI)) from groundwater. This evaluation was conducted at multiple well sites for a water utility in California.
Despite the tremendous advancements in water treatment technology over the past several decades, a handful of compounds remain significant challenges. Among the most challenging for water treatment systems is silica which can lead to irreversible fouling in modern (RO) treatment systems. Magna Imperio’s new Electrochemical Nano Diffusion (END™) process offers a simple and cost-effective solution for treatment of raw water and brine streams with high silica concentrations.
The Golden Heart WTP located in Fairbanks Alaska is a lime softened, ground water treatment plant with five filter basins, with a combined surface area of 1495 ft2 . Typical filter loading rates are in the 2.3 –to 3.1 gpm/ft2
The Santa Barbara desalination plant located in the south-eastern part of Curaçao provides drinking water to about half of the population of this Caribbean island. With an average precipitation of approximately 500 mm, rainwater is the only natural source of freshwater in the island. Government efforts to address the water shortage problem date back to the 20s of the last century. Initially based on evaporation, the seawater desalination evolved into the reverse osmosis technology in the 90s. After several years of experimenting with RO, Aqualectra, the municipal supplier of potable water and electricity for Curaçao, took the decision to move forward with this technology and in 2003 started a project to build a SWRO desalination plant.
The city of Limassol in Cyprus was experiencing an increasingly severe water shortage, with the growing population and expanding tourist industry placing extra pressure on existing supply. An aquifer in a residential neighborhood was seen as a potential water source, but had high levels of salts and nitrates. The Cyprus Water Development Department (WDD) awarded Fluence a Build-Own-Transfer (BOT) contract to implement a cost-effective solution.
Reverse osmosis (RO) membranes are widely used in potable water, wastewater, and industrial applications. However, a major issue in the application of RO membrane technology for desalination and wastewater reclamation is membrane fouling. It limits operating flux, decreases water production, and increases power consumption. Membrane fouling also increases the need for RO plants to perform periodical membrane CIP procedure. These problems decrease process efficiency, increase operation cost, and raise environmental issues related to the CIP solutions disposal.
It’s the call no water treatment plant superintendent wants to receive, especially not while on vacation. Andy McClure, Superintendent of Toledo, Ohio’s Collins Park Water Treatment Plant, answered his phone to hear his head of operations report that the level of microcystin in the finished water was high, caused by a large harmful algal bloom (HAB) that was impacting the plant’s Lake Erie intake.
Now in operation for well over two years in the Malambo, Colombia, the Microclor® system has proven itself in terms of reliability and safety. According to management, the clear, vertically-oriented cells and the system’s open architecture allow for easy inspection and simplify any minor maintenance that might be required.
Cloth media filters are designed for a variety of tertiary treatment applications
The H2Zero Backwash Recycle Systems configuration can be designed for arsenic adsorption or iron & manganese oxidation & filtration systems. Whether backwashing is infrequent (every 45-60 days in the case of adsorption for "fluffing" the media beds or performed one or more times per week using AdEdge can customize a solution to fit your need.
At De Nora, we are strongly committed to providing aftersales and service support for our entire equipmen portfolio and similar competitive equipment.
Shelco Filters' MicroVantage™ high efficiency filter cartridges are the ideal choice when high retention efficiency and outstanding value are essential. Our product range includes high efficiency and absolute rated melt blown depth and pleated filter cartridges to provide multiple options for the filtration process.
By employing the DIC Corporation's proprietary hollow fiber membrane, this module can operate in a vacuum of 20 torr or lower. It can obtain high oxygen removal performance even without using nitrogen and can reduce running costs.
The WesTech COP™ Spiral Blade Clarifier is the result of research and design focus on building a better clarifier. Each COP Spiral Blade Clarifier is designed for the specific process requirements of each plant.
If you don’t need the performance of an ultrafiltration membrane but also want to avoid the large footprint of a conventional media filter, you might want to consider FiltraFast extreme rate compressible media filters. As Ryan Hess, Director of Advanced Separation with SUEZ Water Technologies suggests in this Water Talk interview, “They provide roughly ten times the hydraulic loading rate of conventional media filters.”
Water quality is getting a lot more scrutiny these days. And that’s a good thing says Russ Swerdfeger, Global Director of Memcor Product Management with Evoqua. Alongside his colleague Daryl Weatherup, Director of Marketing with Evoqua, Swerdfeger recently discussed the future of drinking water and the key issues and concerns facing the water industry right now with Water Talk.
Over the past two years, no groundwater issue has perhaps received as much community focus and attention as polyfluoroalkyl and perfluoroalkyl substances like PFOA and PFOS, often referred to as perflourinated compounds (PFCs). The U.S. EPA issued a health advisory, limiting the amount of these compounds to 70 parts/trillion which kicked off a nationwide evaluation of local water sources.
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 this Water Online Radio exclusive interview, Fred Wiesler, Global Director of Sales for the QUA Group, discusses some of the company’s key products, including the EnviQ that uses a flat sheet PVDF membrane, and has a .04-micron pore size. It provides ultrafiltration quality water, with the strength of a PVDF flat sheet membrane.
PPG Industries has spent the last four years developing and field testing a membrane-based filtration technology that has arrived in the market as both a flat sheet and a spiral on filter cartridge.
This video provides a detailed explanation of the process and benefits of the MRI Inclined Plate Settler System over conventional settling methods. MRI’s Inclined Plate Settlers and Hoseless Cable-Vac Sludge Collectors combine in this system to provide a reduced footprint, cost savings, zero energy usage, and superior efficiency and effluent quality.
This video was developed to aid in the assembly of a Brentwood Tube Settler Module. Visit our website if you have questions or would like to learn more about other Brentwood water & wastewater products.
The innovative CoMag System from Evoqua infuses magnetite into chemical floc to make it heavier, significantly improving clarifier performance. This video explains how the CoMag® System works and how it can be used to increase capacity, enhance clarifier performance and achieve total phosphorous of 0.05 mg/L.
Manufacture of filter housings and elements|Pleated membrane and high efficiency cartridges|Bag housings and bags
Filtronics has manufactured water and waste water treatment systems for industrial and municipal applications since 1974
Veolia Water Technologies offers comprehensive water and wastewater solutions for industrial and municipal customers. With unique technologies and process expertise, Veolia specializes in engineering, design, and project management, construction and execution.
3M Liqui-Cel Membrane Contactors are used for degassing liquids. They are most commonly used for O2 removal from water and CO2 removal from water, but they are also capable of controlling a variety of other dissolved gasses as well, such as Nitrogen.
AdEdge Technologies, Inc specializes in the development and supply of innovative technologies, adsorbent-based products, and systems that remove contaminants from process or aqueous steams. We are an organization based on solid deliverable, scalable, scientifically proven technology and experience for the removal of arsenic and other contaminants from water
QUA® is a leading-edge developer and manufacturer of advanced membrane products, which includes fractional electrodeionization (FEDI) and hollow fiber ultrafiltration module (Q-SEP). These are engineered with innovative technologies, which are used to treat challenging waters. QUA is leveraging its deep roots in R&D, the expertise of staff that is highly experienced in water treatment technologies, and its significant financial resources to become a global technology leader in the development of products for water and wastewater treatment applications.
WRT provides effective processes for removing radium, uranium and other contaminants from water. Our complete package of services includes process equipment, proprietary treatment media, safe exchange of media, and proper handling and disposal of used media
Leopold Universal Type S and SL Underdrain|Leopold IMS Cap|Leopold DAF - Dissolved Air Flotation|Leopold Clari-Trac (CT2) Submerged Sludge Collector|Leopold Clari-Vac Floating Sludge Collector|Leopold Engineered Filter Media Products|Leopold Instruments And Controls| Leopold Ultrafiltration Membrane Systems
Since 1969, Aqua-Aerobic Systems, Inc. has been a leader in the design and manufacture of wastewater treatment equipment and systems for both municipal and industrial markets, worldwide.
Water Treatment Equipment |Wastewater Treatment Equipment |Sludge Management Equipment
Ovivo brings together more than 200 years of collected experience, process expertise and proven technologies; but that doesn’t mean that we’re complacent. Over past centuries of growth, development and refinement we have been guided by the principle of delivering value to our clients. Our equipment and technologies already have a reputation for long-term durability and reliability, offering decades of use and leading to lasting relationships with key customers.
Amiad Water Systems is a world leader in water filtration equipment and treatment solutions.
For over 50 years Amiad has been committed to developing a comprehensive line of robust water filtration equipment and integrated treatment packages for water applications in the industrial, municipal (potable and wastewater), oil and gas, commercial HVAC, ballast water, agriculture, irrigation, and aquaculture markets. Our filters are in use in over 70 countries around the world. Every Amiad system is built for efficiency, effectiveness and reliability and is backed by our commitment to excellence and dedication to customer service.
De Nora Water Technologies is a leading supplier of water and wastewater treatment solutions. We provide our clients with some of the industry’s brightest minds, advanced technologies, and quality products to provide you with truly efficient, cost-effective solutions to your water and wastewater challenges
Evoqua Water Technologies, formerly Siemens Water Technologies, is a leader in water and wastewater treatment products, systems and services for industrial and municipal customers. We offer a wide range of proven product brands and advanced water and wastewater treatment technologies, mobile and emergency water supply solutions and service contract options.
Water treatment filtration involves the removal of suspended particles from water by passing the water through a filtration medium. As the water passes through the filter, floc, minerals, microorganisms and other impurities get stuck in the filter and are removed from the filtered water. Passage can be blocked by physical obstruction, biological action, adsorption, absorption or a combination of ways. Filtration is usually the final step in the solids removal process during water treatment which typically begins with coagulation and advances through flocculation and sedimentation.
Unfiltered or turbid water is difficult to disinfect because microorganisms growing on suspended particles are often harder to kill than when they are separated from the particles. Turbidity can also cause unwanted taste and odor issues in the potable water supply. Drinking water filtration is also used to remove microorganisms that are resistant to traditional methods of disinfection such as chlorination. By requiring a low turbidity in finished water, water treatment plants are ensuring that few or no microorganisms such as Giardia are present in finished drinking water.
There are three typical methods of clean water filtration used during the water treatment process. Conventional filtration follows coagulation, flocculation and sedimentation and precedes disinfection. Direct Filtration follows coagulation and flocculation when there is no sedimentation step. The final method called In-Line Filtration takes place without flocculation or sedimentation. A coagulant chemical is added to the water just before filtration and coagulation occurs in the filter.
There are many types of filter media being used in today’s water treatment industry.
