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.
De Nora Water Technologies will showcase its industry-leading water and wastewater treatment solutions at the WEFTEC Technical Exhibition and Conference in Chicago from 27 to 30 September at booth #631.
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.
Stanley Consultants has been awarded two Engineering Excellence awards for design of the wastewater treatment expansion at the South Plant in Iowa City, Iowa.
During a monthly meeting co-sponsored by the Lake Michigan States Section of the Air and Waste Management Association and the Union League Club’s Environment and Public Affairs Committees, Metropolitan Water Reclamation District of Greater Chicago (MWRD) Executive Director David St. Pierre offered a glimpse into the future of the wastewater treatment agency.
Xylem,a leading global water technology company dedicated to solving the world’s most challenging water issues, successfully reduced the amount of sludge produced by a wastewater treatment plant in Ardea, Rome in Italy by 43 percent, saving more than €170,000 annually in landfill costs.
Iranian researchers from Semnan University designed a photocatalyst with high efficiency and rate to eliminate organic pollutants at laboratorial scale to obtain an optimum water and wastewater purification system.
Alkame Holdings, Inc. (OTCQB: ALKM), a publicly traded health and wellness technology holding company with a focus on patentable, innovative, and eco-friendly products announced today that High Country Shrimp LLC, the Company's wholly owned subsidiary, has secured a location and begun testing for the company's 'proof of concept,' utilizing the patented Alkame technology for use within the aquaculture industry.
Xylem, a leading global water technology company dedicated to solving the world’s most challenging water issues, has been awarded a $1.25M contract to provide advanced treatment technology to the South Wastewater Treatment Plant in the city of McAllen, in Texas, USA.
The International Ultraviolet Association (IUVA) has announced the Call for Abstracts for the 2020 IUVA Americas Conference taking place March 8-11, 2020 at the Disney Coronado Springs Resort in Orlando, Florida.
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.
With accelerating global concerns about the need for water and air purification solutions, the International Ultraviolet Association (IUVA) announces the 2017 IUVA World Congress, September 17-20, 2017 in Dubrovnik, Croatia.
Global public health organization NSF International and the American Water Works Association (AWWA) have published the first American National Standard for assessing the sustainability of water treatment chemical products – NSF/AWWA/ANSI 416: Sustainability Assessment Standard for Water Treatment Chemical Products.
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.
Kruger will implement two 12.5 MGD ACTIFLO systems for Warwick’s Advanced Wastewater Treatment Facility phosphorus removal upgrade, as part of the city’s wastewater facility’s nutrient removal upgrade plan.
The International Ultraviolet Association (IUVA) has revised the dates for the 2019 IUVA World Congress, which will now take place February 10-13, 2019 at the University of New South Wales (UNSW) in Sydney, Australia.
The treatment of raw water entering a Water Treatment Plant through a rectangular channel can seem like a daunting task with an added problem of low allowable pressure drop, injection of chemicals, and the desired homogenous blend of output downstream.
Drew Bledsoe, former NFL quarterback and principal of Bledsoe Capital Group, appeared on CNBC's Closing Bell on Friday, March 22nd to discuss how Ecosphere's (OTCBB:ESPH) patented Ozonix® technology is allowing oil and gas exploration companies to recycle wastewater and eliminate chemicals traditionally used in the hydraulic fracturing, or fracking, process.
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.