Every year, World Water Week, a conference organized by the Stockholm International Water Institute(SIWI), brings together experts from around the world to discuss global water issues. This year’s event focused on Water, Ecosystems and Human Development, with discussions concentrating on how business, NGOs and government agencies are collaborating to address water-related challenges. During a session organized by third-party certifier SCS Global Services, water leaders shared how their water stewardship programs have advanced with the Alliance for Water Stewardship (AWS) Standard.
With the impacts of Hurricane Florence continuing to unfold, coastal communities in the Southeast will soon be looking to other coastal areas, like Houston, as models for rebuilding resiliently. By doing so, they can speed their recovery and build back in smart ways – because that’s what resilience is all about.
In the wastewater treatment industry, coagulation has become one of the most widespread processes for effectively separating contaminants and effluent. But coagulation is a complicated and sensitive process, one that alters the chemical balance of the wastewater in order to strip it of unwanted constituents. As in many such processes, pH plays a critical role, and treatment professionals must analyze it closely if they want to properly coagulate their product.
After 18 water mains broke in Hoboken, NJ, over the summer, the city council and city administration moved to take bids for a new water company to replace SUEZ Water.
Three thousand litres of water — that is the amount needed to produce the food each British person eats every day. This is according to a new study into the “water footprint” of diets in Western Europe, conducted by the European Commission and published in Nature Sustainability.
Corrosion control has always been a priority for distributing safe drinking water throughout the world’s networks of pipeline. This has become all the more critical following the outrageous lead poisoning revelations in Flint, MI — an incident caused directly by corrosion of the city’s lead-based infrastructure.
Nearly every industry requires water and wastewater treatment to some degree. From food and beverage to pulp and paper operations, influent and effluent must meet certain conditions to adhere to regulatory and/or performance requirements, and water used during the process must conform as well.
As officials continue to tabulate the fallout from Hurricane Florence, it is clear the damage wrought by polluted floodwaters will be among the major challenges the region faces.
Flow meter accuracy is critical for process control but can be hampered by upstream and downstream flow disturbers. This problem may be addressed during the design process, though in some circumstances it’s impossible to eliminate disturbers.
Most of us don’t have to think about the vital infrastructure that supports our society. Water is delivered to our homes and businesses 24/7, and wastewater is efficiently and cleanly whisked away. The ability of our utilities to manage these services means we only take notice at times of inconvenience: water outages, sewer blockages, or stormwater overflows.
Central district heating systems have gained attention in recent years because they can be more efficient than localized boiler units. The efficiency of district heating is usually due to power generation plants being able to produce heat and electricity simultaneously. District heating also helps prevent pollution by using advanced flue gas cleaning techniques.
A major power plant in Thailand is using 3M™ Liqui-Cel™ Membrane Contactors to remove carbon dioxide from a DI water system. The system is an expansion project and will be used to feed a high pressure boiler. Liqui-Cel membrane contactors are being used to lower the CO2 inlet into an Ionpure Electrodeionization (EDI) system. Carbon dioxide adds an ionic load to the EDI system, which can reduce the performance of the system. Manufactures of the EDI equipment suggest lowering the inlet CO2 to reduce the load on the equipment and improve the water quality.
For any drinking water or wastewater treatment operation, pH neutralization is never far from top-of-mind. The regulatory standards for pH to which effluent must adhere, also known as “pH neutralization,” are central to ensuring that treatment is performed accurately and that the water or wastewater leaving a plant is safe.
The manufacturing of soda ash from Trona is a multi-step process that results in the production of a waste liquor that contains significant levels of organic contamination.
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.
It is no secret that the number of landfills has been steadily decreasing across the United States. As more and more cities adopt ‘zero waste to landfill’ sustainability goals, the number of landfills has shrunk from 6,326 in 1990 to 1,738 in 2015. Decreasing landfills has meant increased waste hauling costs for wastewater treatment plants (WWTPs) as sludge travels farther distances to reach landfills.
An estimated 90 million illnesses each year are caused by exposure to microbial contaminants in U.S. recreational waters, costing approximately $2.2- $3.7 billion in medical bills. Much of the contamination is a result of human or other animal feces getting into the water.
Two states have mandated that public water systems test their water for algae toxins, and more states could follow suit, according to NPR.
Water utilities in the U.S. were once operated almost completely by private companies. That began to change when Boston, New York, Los Angeles, and other large cities expanded in the late 19th century. Water utilities failed to manage the increased demand and government leaders stepped up to assume responsibility for adequate water resources. That’s been the case for decades, but now water problems are critical again.
Our environment is rife with testimonials to the law of unintended consequences. When it comes to water treatment, the compound 1,2,3-trichloropropane (TCP) is the latest surprise making its way through the remediation lifecycle.
During 2017’s Hurricane Harvey, the wettest tropical storm on record in the United States, over 52 inches of rain fell in the Houston area. The Vaughan pumps ran continuously for 72 hours with no plugging incidents and no problems while pumping over 2.5 million gallons of unscreened sewage through the lift station. It never flooded and none of the 150 homes served by this lift station experienced sewer back-ups.
This month, the Bloede Dam will be removed from the Lower Patapsco River near Ilchester, Maryland. The restoration is a one-of-a-kind natural experiment that will help test how relatively inexpensive drones can help scientists like me understand the integrity of streams and rivers.
On the banks of Puget Sound and in the shadow of Mount Rainier exists Tacoma, Washington. The city is home to approximately 211,000 residents, making it the third largest in the state of Washington. Tacoma’s vision is one focused on stewardship and resiliency, as outlined the Environmental Services Department strategic plan: “We believe everything we do supports healthy neighborhoods and a thriving Puget Sound, leaving a better Tacoma for all.”
Can you imagine calling the electric company to demand a rebate because you had just received your bill and realized that over the past month, you inadvertently left all your lights on? As ludicrous as this scenario seems, it’s exactly the type of call water utilities receive from their customers.
Condensation, build up, obstructions and silt can cause difficulties in making reliable level measurements in lift station wet wells. New trends in low cost radar units solve these problems.
In this video, we discuss the curious science that is the inclined plate settler (also known as a Lamella). The process is a bit counter-intuitive, but through an interesting experiment, this video shows how they work. Inclined plate settlers can reduce required footprint by 80% compared to traditional gravity settling.
New York American Water is under scrutiny for what public officials see as questionable charges on customer bills.
Following a disaster like the back-to-back hurricanes that hit Texas, Florida, and Puerto Rico in 2017, water systems can become flooded and unable to provide safe drinking water to communities. EPA researchers recognized the need for portable water treatment systems that can quickly and cost-effectively provide safe drinking water to affected communities following a disaster.
Despite the destruction of Hurricane Harvey in August 2017, Duperon® wastewater screening systems in the cities of Cuero and Refugio, Texas – approximately 150 miles southwest of Houston – were virtually unaffected by the storm. Duperon’s FlexRake® bar screens, installed at both locations as well as dozens of other sites in and around Houston, remove objects like rags, paper, plastics, and metals to prevent damage and clogging of downstream treatment equipment. Both communities found essentially no damage to their wastewater screening equipment.
It has long been established that predictive maintenance of existing equipment will reduce operating costs and help ensure safe operation.
Detroit public school students will not have the option of quenching their thirst at water fountains this year.
Utility managers are continually challenged to run water systems in the most efficient manner. Reducing non-revenue water (NRW) is an important component for system efficiency. In many states, regulators are placing caps on NRW or requiring reductions in the amount of NRW. Accurate and well-planned flow measurement can be used to locate areas of water leakage and reduce NRW.
Ozone is used widely for water treatment in Europe and Asia. Now, with more than 40 years of global experience, De Nora is bringing CAPTIAL CONTROLS Ozone to North America.
A powerful oxidant with fast reaction time, no added chemicals, and reduced disinfection byproducts, Ozone is an appealing and growing option for water and wastewater treatment. Watch the full video to learn more.
Over the past two decades, the trend from traditional design-bid-build (DBB) construction project-delivery practices to design-build (DB) practices has grown. Is that merely a cyclical trend or a step change that is destined to be a fixture for a long time to come?
Lani Good, P.E., is an Asset Management Practice Leader. During her 5 years at West Yost Associates, she has specialized in Utility Asset Management. Her organization exclusively focuses on water, wastewater, and stormwater systems to ensure longevity for typical water infrastructure assets – pipes, pumps, storage and treatment plants.
The water burbling down the hillside amid thick, green foliage, certainly looked like a stream.
The financial cost to maintain their ozone equipment, and increasing scarcity of replacement parts for their ozone generator, motivated a utility in Springfield, MO, to upgrade their ozone system. Read the full case study to learn how the plant assessed the energy cost of a sidestream ozone injection system compared to that of a turbine mixing design and showed that the Mazzei retrofit design reduced the energy cost of ozone contacting by an average of 69.2% under all plant flow conditions.
A farm in Lower Saxony with sow breeding, floor-feeding laying hens and biogas plant is installing a BlueBox Ultra for the treatment of manure from the Swiss agri-tech company Bluetector.
De Nora, a leading designer of safe, innovative, and sustainable water disinfection and oxidation, filtration and electrochlorination solutions, today announces the launch of its next generation of ClorTec® on-site sodium hypochlorite generators at WEFTEC, the Water Quality Event.
Centrisys/CNP (Kenosha, WI), a leader in decanter centrifuge technology and systems for nutrient recovery and sludge optimization, has announced their exclusive distributorship for the Passavant hydrograv adapt System in North America (U.S. patent pending).
It’s now possible to both quickly and easily identify all microbes in a sample and determine the abundance of specific microbes as LuminUltra, a global market leader in rapid and portable microbiological monitoring tools, has acquired InstantLabs, a developer of DNA-based measurement technologies.
The responsibilities of the Royal Irrigation Department of Thailand (RID) include developing the nation’s irrigation systems and managing its flood control infrastructure.
These documents provide technical descriptions of the signal-in-space eLoran waveform and two accepted data channel techniques that include explanations, and recommended practices.
Pipeline Renewal Technologies, a distributor of underground pipeline rehabilitation solutions, has released an “Installation Logbook for Mechanical Point Repair.”
The potential of sensors and digital technologies to transform the water sector will be in the spotlight at a British Water conference taking place in Leeds on 3 October 2018.
Operating expenditures (OPEX) for water and wastewater utilities continue to climb at a steady clip, according to Bluefield Research’s recent 2018-2027 forecast.
The U.S. Environmental Protection Agency (EPA) has reached a settlement with the Sacramento Regional County Sanitation District for chemical safety and risk management violations at the Sacramento Regional Wastewater Treatment Plant. The sanitation district will pay a $37,830 civil penalty and make improvements to its risk management practices.
Louisville-based non-profit WaterStep is sending a shipment of equipment and tools that produce safe water and disinfectant to aid those affected by Hurricane Florence in the Carolinas and Virginia.
The Water Environment Federation (WEF) proudly announces the 2018 WEF Awards recipients for operational and design excellence. These awards recognize individuals and organizations that have made outstanding contributions to the water environment profession.
17 years of 100% effectiveness from our previous TrojanUV system made us confident that upgrading with TrojanUV would continue this excellent performance. Read the case study.
Robert Renner, Chief Executive Officer
Water Research Foundation
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Sun Chemical Advanced Materials delivers SEPAREL® hollow fiber membrane modules for liquid degassing, a proprietary technology from the DIC Corporation. SEPAREL modules are optimized for the degasification of various liquids, including water, inkjet ink, and a range of corrosive chemicals. Learn more.
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