The UV disinfection system at the Plant 20 Wastewater Treatment Plant was installed in 2002, but over the years staff continued to struggle with PLC and controls-related issues, ballast failures, and water level management. An overhead crane was needed to operate the water level management device, and water level fluctuations of 12” were common, which contributed to an increase in fouling on the quartz sleeves.
The climate in Southgate, Ontario, is considered cold and temperate with significant rainfall throughout the year. Temperatures in winter average around -10°C and can drop as low as -30°C to -40°C for brief periods of time, which can wreak havoc on the local water storage tanks and distribution piping. Read more to learn how the installation of PAX Mixers has kept the tanks free from ice and has shown an improvement in disinfectant residual levels.
The Chief Operator for a surface water treatment plant (SWTP) reports that replacement of a troublesome vacuum liquid feeder for poly aluminum chloride (PACl), with a more advanced vacuum liquid feeder, ended the threat of a process upset for operations staff that was caused by the previous unit not being able to hold a constant feed rate. The ability to provide a consistent feed is needed as a key element in the plant pre-treatment process, which features turbidity reduction and clarification.
In 2008 Texas was facing an extended drought and the City of San Angelo was weighing its alternatives. The City felt the Hickory Aquifer well field was the best water option available, but this water contained significant amounts of radium and iron.
The City of Silverton is known as Oregon’s Garden City and sends one million gallons a day of treated effluent to the Oregon Gardens, returning the remainder to Silver Creek.
In the past several years, Aquarion Water Company had been monitoring their system’s THM formation and attempting to lower them through treatment and distribution system changes. Aquarion engineers decided that reducing THM formation in the Laurel High Service Clearwell at the Stamford Water Treatment Plant (WTP) would eliminate concerns of elevated THM formation in the distribution system served by the WTP.
In late 2005, the City of Newberg, Oregon, decided to upgrade their water treatment plant disinfection process from gas chlorine to on-site hypochlorite generation (OSHG) in an effort to simplify operations and increase operator safety. The plant produced an average of 2.5 million gallons per day (MGD), with a peak capacity of 5 MGD.
The Baia Mare Aurul gold mine in North Western Romania suffered a historic catastrophe in January 2000, when its dam burst, streaming out 100,000 cubic meters of waste water, largely contaminated with cyanide, commonly used in the process of mining gold, into tributaries of the Tisza River, a major waterway in Hungary.
In an effort to lower operational costs and extend the life of the dewatering centrifuge, operators in Springboro, OH, began to look at the polymer activation equipment in use at the plant. The Polyblend® M-Series emulsion polymer activation systems had been in steady operation for over 10 years. The equipment still performed reliably, but operators were interested in ways to achieve greater efficiency. They were aware of the new Polyblend® Magnum mix chamber, with its enhanced two-zone mixing energy.
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 Lariana Depur wastewater treatment plant in Fino Mornasco, Italy, treats wastewater from multiple textile manufacturers in the Como region, known as the heart of the textile industry. Since 1994, ozone has been used effectively as a polisher to remove the dark blue-purple color — the result of the dyes used in the textile dyeing and printing process — from the water.
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.
The NeoTech Aqua Disinfection Series is specially designed to disinfect water and is an essential component in advanced oxidation processes.
De Nora Water Technologies’ SANILEC® 6 system generates sodium hypochlorite wherever and whenever disinfection is required. These lightweight, extremely portable systems are designed for use in rural or isolated locations where water purification, waste treatment or surface disinfection is required. SANILEC 6 systems are ideal for use in areas where chemical storage creates a risk or in areas where other disinfectant chemicals are in short supply.
NeoTech Aqua Solutions provides the most efficient and cost-effective UV systems for destroying Total Organic Carbons (TOC’s) in water. Whether your destroying NDMA, 1,4-dioxane, TCE, MTBE, urea, endocrine disruptors or other organics, only NeoTech Aqua provides ultraviolet TOC reduction with a treatment chamber optimized for low pressure mercury lamps. As a result, NeoTech Aqua’s UV systems achieve a three times greater TOC reduction per kilowatt compared to standard UV systems, reducing our clients’ costs and energy consumption. In addition to efficiently generating ample 185 nm UV for TOC reduction, NeoTech Aqua’s TOC reduction systems also generate significant levels of 254 nm UV which serve as a powerful disinfectant, providing you both TOC-free and organism-free product water.
The MEMCOR® CS system is based upon the solid foundation of the Memcor technology that has been proven in thousands of installations across all countries and markets. The high performance of MEMCOR CS system is ideal - and affordable - for municipal water, wastewater, industrial and water reuse treatment.
The revolutionary new ClorTec® SCT is a fully integrated patent pending design from De Nora Water Technologies. Salt, water and electricity are electrolyzed to produce up to 4.4 lb/day (2 kg/day) chlorine equivalent of hypochlorite solution at 0.7% strength. The system offers superior health and safety benefits for employees on site due to its innovative design.
Evoqua Water Technologies is the premier provider of total disinfection and chemical dosing solutions. Our extensive portfolio, which includes the trusted Wallace & Tiernan product line, is designed to meet your most rigorous demands in virtually any water application and give you access to both the latest advances and widest range of proven technologies.
The patented Foambuster uses the same glass-lined ductile iron nozzles as Rotamix but also uses a stainless steel splashplate located below the nozzle to deflect the nozzle discharge and create a broad spray of sludge, which wets and breaks up foam forming on the surface of the digester. Digester sludge is pumped through the Foambuster either by the Rotamix Chopper Pump or by a separate Chopper Pump. When the Foambuster is used in conjunction with a tank mixing system, which produces a rotational mixing pattern in the tank, only one spray nozzle will be required for effective foam control.
De Nora Water Technologies has developed a comprehensive preventative inspection and maintenance contract program for our ClorTec® on-site sodium hypochlorite generation system.
Engineered skid systems provide a compact configuration chemical feed at water and wastewater treatment plants. While these all-in-one metering pump solutions bring tremendous value to their users, traditional platforms have their pitfalls.
As water reuse becomes increasingly common, more utilities will get to know ozone. To explain its role in water treatment schemes, Water Talk welcomed Jim Lauria, Vice President of Sales and Marketing at Mazzei Injector Company, and Ben Kuhnel, Senior Project Manager for Arcadis. Learn how ozone works in concert with other processes to safely recycle water and treat contaminants of emerging concern — even in mobile/on-site applications.
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.”
Of all the process considerations facing wastewater treatment operators, disinfection is one of the most important. In this exclusive Water Talk interview, Gary Lohse, Technical Sales Manager, Disinfection with De Nora Water Technologies, discusses how disinfection has become increasingly complex over time. Lohse reviews a host of selection criteria including target microorganisms, control strategies, disinfection by-products, capex and safety.
The operating ranges for chemical injection need to be large because of the variability of flow in many treatment operations. As Bill McDowell, Vice President of Operations with Blue White Industries explains in this Water Talk interview, “You might be down to as low as 5 or 10 milliliters a minute and then one hour later; you might need to pump 15 gallons a minute out of the same pump and through the same sensor.”
One of the trends in water and wastewater treatment over the past decade has been a growing demand for decentralized systems. Water Talk recently caught up with Nii Mensah, General Manager of Fluence USA, to learn more about the solutions that the new company (formed by the merger of RWL Water and Emefcy) is bringing to market to address communities’ treatment needs
Trojan Technologies has been providing treatment solutions for the water/wastewater market for four decades, but 2018 stands out as the year Stephen Bell joined as its new president. Water Online had opportunity to catch up with Bell at WEFTEC, where he talked about the company's culture, philosophy, and drive to innovate. One particular innovation is the TrojanUVFlex, a drinking water disinfection and advanced oxidation system for both potable and non-potable reuse applications, as well as the destruction of chemicals such as 1,4-dioxane. Tune in for an introduction to Bell and a summary of Trojan's unique technology.
Water. It’s vital to human life, our economy, and ecosystem - the very survival of our planet. But water challenges are growing more intense than ever before. Increasing volatile weather patterns fueled by climate change, crumbling infrastructure, pollution, and over population that is causing a surge in the demand for water. This means the world’s supply of clean water is rapidly declining putting our future at risk.
For more than 30 years, Aqua-Aerobic has provided thousands of industry professionals with education and training through the company’s highly-regarded technical seminar program. Our industry-known seminar is ideal for those individuals involved in the design, application, procurement and operation of water and wastewater treatment plants.
CFD modeling was used to design, position and validate performance of the new, patented flow conditioning vanes and post-injection blending grid. The same, proven mass transfer mixing nozzles used in the original pipeline flash reactor (PFR), are also part of the PFR+.
Daryl Weatherup, Managing Director at De Nora Water Technologies, gives an overview of De Nora's updated disinfection offerings, including its CAPITAL CONTROLS MCP ozone generator, CAPITAL CONTROLS Chlorinator, and ClorTec onsite hypochlorite generator.
Desalitech was named the winner of the 2016 Global Water Award for Breakthrough Water Technology Company of the Year.
A Fall River, Mass. company has taken significant steps to make its chemical manufacturing, warehouse, and distribution facility safer following an Administrative Compliance Order issued by EPA in March 2014 that identified several dangerous conditions arising from the company’s use, storage and handling of chlorine and ammonia.
ICAP Patent Brokerage announces for license a multi-patented, revolutionary Advanced Oxidation Process (AOP) from Ecosphere Technologies, Inc. that is currently being used by Fortune 500 customers to reduce costs, increase treatment efficiencies and eliminate liquid chemicals from wastewater treatment operations around the United States.
Aquatech, a global leader in water and wastewater technologies for the industrial and infrastructure markets, is highlighting its LoWatt™ desalination technology at the 2015 IDA World Congress, Booth 721.
The Water Environment Research Foundation (WERF) is seeking research proposals to examine the effects of peracetic acid (PAA) on aquatic life, on water- and wastewater-related processes, and to provide guidance on the use of PAA as a disinfection method.
St. Louis, Mo.-based Guarantee Electrical Co. is advancing the electrification and process control instrumentation installation for a new $55.6M municipal wastewater treatment plant being built by Cape Girardeau, Mo.
Ozone treatment efficiently removes many micropollutants contained in wastewater, but in some cases, it can lead to the formation of toxic byproducts.
The Environmental Engineering and Microbiology Group (GEMMA) of the Universitat Politècnica de Catalunya (UPC) is investigating how to produce new energy resources and high-value products from wastewater of urban, industrial and agricultural origin through the European project INCOVER.
Aquionics, a leading provider of ultraviolet (UV) disinfection technology is to unveil a new US EPA and NWRI-validated energy efficient UV system for municipal waste water and reuse water applications at WEFTEC 2017
Typhon Treatment Systems, an innovator in energy efficient water treatment technology, announces it has closed a financing round led by Saudi Aramco Energy Ventures (SAEV), the corporate venturing subsidiary of Aramco, the world’s largest integrated energy company.
Fluence Corporation Limited is pleased to announce the execution of a contract for the delivery of the first SUBRE project in China that will be used to meet the higher stringent wastewater standard Class IV Surface Water Discharge.
De Nora, a leading designer of safe, innovative, and sustainable water disinfection and oxidation, filtration and electrochlorination solutions, will be exhibiting at IFAT Munich from May 14-18.
World Water Works, Inc., a leading designer and manufacturer of wastewater treatment solutions, announces their IDEAL Moving Bed Biofilm Reactors (MBBRs) for BOD removal, nitrification, and denitrification at municipal treatment plants.
AquiSense Technologies is proud to announce a Cooperative Research and Development Agreement (CRADA) between the United States Environmental Protection Agency (USEPA), Washington University, and AquiSense Technologies.
Pinnacle Ozone Solutions, LLC (Pinnacle Ozone), and its partners BlueInGreen, LLC (BlueInGreen) and PCI, Inc, leading suppliers of gas transfer and oxygen generation process technology and equipment, announced that they have been selected to provide a new state-of-the-art ozone system for the City of Fayetteville, Arkansas Paul R. Noland Wastewater Treatment.
Envirocleanse LLC, division of Charter Brokerage, a BERKSHIRE HATHAWAY company, announces the completion of all land-based and shipboard testing for its patented inTank™Ballast Water Treatment System.
An estimated 60,000 shipping vessels account for about 90 percent of the global economic trade. These ships require ballast water to maintain balance and stability.
Wastewater disinfection takes place after primary, secondary and sometimes tertiary wastewater treatment. It is typically a final step to remove organisms from the treated water before the effluent is released back into the water system. Disinfection prevents the spread of waterborne diseases by reducing microbes and bacterial numbers to a regulated level.
A variety of physical and chemical methods are used to disinfect wastewater prior to it being released into natural waterways. Historically, the chemical agent of choice for municipal wastewater treatment has been chlorine, due to its disinfecting properties and low cost. However, the rising cost of chlorine and concerns that low chlorine concentrations can still be toxic to fish and other wildlife, has given rise to more physical methods of wastewater disinfection being adopted such as ozonation or ultraviolet (UV) light.
The use of ozone as a disinfection agent has the added benefit of increasing the dissolved oxygen content of the treated wastewater. However, because the ozone has to be generated, ozonation can require prohibitive up-front capital expenditure compared to traditional chlorination. UV disinfection has been growing in popularity as a wastewater disinfection method, in large part because of the life-cycle economics of the equipment and the fact that, like ozone, there is no toxic residual.
