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.
Global Water Technologies (OTC Pink:GWTR) is pleased to announce it has signed a Memorandum of Understanding (MOU) with AquiSense Technologies, a Kentucky company that is unveiling the world’s first UV-C LED production product for water disinfection at Aquatech Amsterdam.
The International Ultraviolet Association (IUVA) has announced the Call for Papers for the 2016 IUVA World Congress & Exhibition.
NeoTech Aqua Solutions, Inc., the industry leader in High-Efficiency Ultraviolet (UV) water treatment systems proudly announces the addition of Jeff Green to its Board of Directors.
Her Majesty’s Ambassador to the Kingdom of Morocco, HE Mr. Clive Alderton, recently toured Biwater’s turn-key wastewater project in Aourir while under construction.
AquiSense Technologies is pleased to announce that it has entered into a collaboration agreement with International Light Technologies (ILT) whereby ILT sensors will be offered in combination with the AquiSense PearlBeam, a bench-scale UV device for research applications.
Dow Microbial Control, a business group of The Dow Chemical Company, has received approval from the United States Environmental Protection Agency for its innovative, solid form of KATHON Antimicrobial.
Human sewage disposal in Antarctica presents a risk of introducing non-native bacterial species, specifically E. coli, into endemic Antarctic wildlife, potentially affecting its diversity and evolution, a new research project led by Macquarie University has found.
Xylem Inc., a leading global water technology company focused on addressing the world’s most challenging water issues, has launched a new, more energy efficient and virtually maintenance free generation of its Wedeco SMOevo and PDOevo ozone oxidation systems.
NeoTech Aqua Solutions Inc., the leader in high-efficiency UV systems for disinfection, Advanced Oxidation Processes, and TOC Reduction in water and water reuse will be participating at the CA/NV AWWA Conference in Anaheim, CA March 24-27, 2014. Visitors are invited to visit our exhibit and meet NeoTech Aqua’s technical and business leaders at Booth 515 during exhibit hours on March 25th and 26th.
The TrojanUVSigna will receive the Innovative Technology Award from the Water Environment Federation (WEF), an international not-for-profit technical and educational water quality organization.
The Water Environment Research Foundation has awarded the University of Cincinnati, Southern Nevada Water Authority, and Iowa State University with contracts to support further research on trace organic compounds (TOrC) and pathogens.
Bio-Microbics is pleased to announce the availability of our new Mobile App for tablets and Smart Phones! We created the Bio-Microbics APP for a direct link to important pages on our Website in a fun and interactive screen.
Desalitech, a global leader in reverse osmosis water treatment, recently announced that Jantje Johnson has joined their growing team.
The webinar, advanced hollow fiber UF membranes improve performance in tertiary water treatment, will help you decide which membrane solution is best for your water treatment system.
A report concludes that blooms of toxic cyanobacteria, or blue-green algae, are a poorly monitored and underappreciated risk to recreational and drinking water quality in the United States, and may increasingly pose a global health threat.
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.
De Nora, a leading designer of safe, innovative, and sustainable water disinfection, oxidation and filtration technologies, has achieved NSF/ANSI 61 Certification for its ClorTec® T Series On-Site Sodium Hypochlorite Generation System (OSHGS).
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.