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.
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.