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.
Morgan Advanced Materials has applied its world-leading ultrasonic transducer technology to water purification, helping to deliver components which improve performance in wastewater applications.
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.
Padre Dam Municipal Water District celebrated the grand opening of its Advanced Water Purification Demonstration Facility and tour program today. The demonstration facility will use advanced water purification technologies to purify and test approximately 100,000 gallons of recycled water each day.
Ecosphere Technologies, Inc. (OTCQB: ESPH), a U.S. technology licensing and innovative manufacturing company, today announced completion of manufacturing and delivery of an Ozonix® EF10M water treatment system for Brasil Clean Energy ("BCE"), an environmental services company and recent Ecosphere licensee in Brazil.
Ecolab Textile Care has signed an exclusive global agreement with Wisconsin based OMNI Solutions for its Smart Ultraviolet Light Advanced Oxidation System technology for commercial laundries.
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.
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.
AdEdge Water Technologies (AdEdge) and InNow India Pvt. Ltd. (InNow) recently announced a joint venture to provide innovative water treatment solutions for municipalities in India for the removal of arsenic, nitrate, radionuclides, and fluoride among other contaminants.
Clearford Water Systems Inc. (“Clearford” or the “Company”) held its Annual General Meeting of Shareholders recently in Ottawa.
Imagine something that can turn cow manure into clean water, extract nutrients from that water to serve as fertilizer and help solve the ever-present agricultural problem of manure management.
PeroxyChem, a global leader in peroxygen chemistries, plans to construct a new peracetic acid (PAA) production facility in Memphis, Tenn. Construction will begin shortly. A formal groundbreaking was held on December 6 at the Maynard C. Stiles Wastewater Treatment Plant.
Rivertop Renewables, a Montana-based novel chemicals company, announced that it has released its first technical bulletin for Waterline Cl, the company's sustainable, high-performing corrosion inhibitor for use in industrial cooling water systems.
Biwater continue to deliver turnkey wastewater treatment solutions serving populous and important economic zones across North Africa. Most recently, Biwater were awarded a contract to deliver vital wastewater infrastructure for the city of Laayoune.
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.
The Orange County (California) Water District (OCWD), recipient of this year’s prestigious Lee Kuan Yew Water Prize, continues to implement the expanded Evoqua MEMCOR® modular membrane system at its pioneering Groundwater Replenishment System (GWRS).
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).
The City of Oak Harbor has awarded the contract to supply the UV disinfection equipment for the wastewater plant improvement to ETS-UV by Neptune Benson.
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.