The long holiday weekend was filled with news about seismic activity in California and Nevada. An original jolt on Thursday was followed by thousands of aftershocks and an even stronger 7.1 quake on Friday, and tremblers are expected to continue for days.
Ammonia is a naturally occurring compound of nitrogen and hydrogen. As a key ingredient in many fertilizers, the most common way that it infiltrates source water and causes water treatment plant (WTP) problems is as agricultural runoff. Fortunately, new biological treatments can now handle ammonia and frequently co-occurring compounds such as iron and manganese all in one process.
Recently, Denver Water’s board approved its proposed “Lead Reduction Program Plan” to fully replace the estimated 75,000 lead service lines (LSLs) in their system within 15 years. The plan is an innovative solution that will remove the primary source of lead within Denver Water’s system, while avoiding the use of orthophosphate that can further exacerbate nutrient pollution problems in rivers, streams, and oceans.
It is no secret that a large portion of the drinking water infrastructure in the U.S. is near or past its intended design life. Our nation’s water infrastructure needs an overhaul, and the cost of doing so is climbing rapidly. ASCE’s 2017 Infrastructure Report Card graded the nation’s drinking water infrastructure a D. According to AWWA, an estimated $1 trillion is necessary to maintain and expand drinking water service to meet demands over the next 25 years.
The presence of dissolved solids presents both physical and financial challenges for aeration diffusers in any wastewater treatment operation and can be particularly problematic in high-concentration industrial and food-processing applications. Here are some warning signs, insights, and solutions for coping with conditions that can lead to excessive dissolved solids accumulation.
Ammonia removal is a key metric for assessing wastewater treatment facility performance. This is because ammonia contributes to aquatic life toxicity. Furthermore, nitrogen, along with phosphorus, is a driver of receiving water eutrophication. Eutrophication, which simply is an over-enrichment of nutrients, can be detrimental to environmental and public health. It can result in harmful algae blooms, dissolved oxygen depletion, fish kills, and other damaging impacts.
The Water and Sewer Authority of Cabarrus County (WSACC) serves selected water and sewer needs for five jurisdictions in south-central North Carolina — Cabarrus County, Concord, Kannapolis, Harrisburg and Mount Pleasant — providing wholesale wastewater transportation and treatment and reservoir management.
A 30-inch diameter 160-year-old cast iron pipe was recently excavated and retired from gas service in Chicago, Illinois. Installed in 1859, this pipeline provided Chicago’s residents, fewer than 112,000 at the time, with reliable lighting at night. As the years passed, this cast iron pipe continued to provide dependable gas service in the tough urban environment of downtown Chicago.
In the wake of ongoing source water scarcity, one of the country’s most critical — and critically stressed — drinking water sources will soon benefit from mandatory conservation measures.
When the Hugh K. Leatherman Sr. Terminal opens in North Charleston in 2021, container traffic traveling to and from it will use the new Port Access Road, a direct route from I-26 that will reduce the need for commercial trucks to use local roads. Supporting the mainline road’s foundation piers will be South Carolina made spiral-welded structural steel pipe installed as vertical piles driven 60 to 90 feet into the ground. Spiral-welded steel will also be used in the subfoundations of associated new bridges and roads.
Determining whether a region has sufficient water to satisfy the needs of people who live there is a complicated and imperfect process. Our research team has developed a new approach to measure water scarcity by using satellites hundreds of miles in space.
The City of Aurora is home to over 370,000 people and is Colorado’s third-largest city. Their wastewater system consists of approximately 1,100 miles of underground piping network.
Managing the treatment of wastewater — especially industry-generated wastewater that can elevate dissolved oxygen (DO) demands far beyond those of municipal/residential applications — is hard enough. Trying to do so during upset conditions is enough to put any water treatment professional on edge. Here are several preventive and remedial options to keep in mind before or after DO readings go haywire.
Nature has long provided guidance to simple and sustainable ways to manage environmental challenges. Biological treatment of potable water is no exception. As more water is required to support human activity worldwide, sources once considered too contaminated or expensive to treat are quickly becoming necessary options. For groundwater contaminant removal, once again, the laws of nature point the way.
For municipal water systems, the endless demand to maintain water quality can be challenging. Anytime the quality or pressure drops far enough to necessitate a boil notice, the costs to inform residents and get the problem under control can be extensive. It can also create a public relations nightmare. Newer solutions provide a cost-effective way to build an entire smart utility network to more proactively manage water quality and generate greater ROI.
On the afternoon of May 19, 2011 KLa Systems was contacted by one of their customers located in Virginia. The customer stated that their aeration basin was running at near 0 mg/l dissolved oxygen (DO) residual with their air supply blowers running at 100% of capacity. Based on the conversation it was determined that a KLa field service technician was needed on site immediately.
With so many different safety concerns — government-mandated or self-imposed — municipal and industrial wastewater treatment operators have a lot on their plates. Maintaining aerators used in open-basin treatment applications is just one source of those safety concerns. That is why a new approach to safeguarding worker well-being in the process of aerator maintenance activities is worth a closer look.
Since 1972, the Clean Water Act has served as the cornerstone federal regulation governing water pollution in the United States. And now, the U.S. EPA has proposed that significant changes be made to it in order to ease processes for construction projects.
When a municipality or business wants to reuse their wastewater, some applications require more treatment than others due to the quality of the wastewater. Many standard wastewater treatment systems consist of pretreatment, primary treatment, and secondary treatment stages. By the end of the secondary stage, a majority of the pollutants, solids, organics, inorganics, and metals have been removed or reduced. This is where reverse osmosis wastewater treatment can be utilized in a third stage process.
Arsenic (As) is a naturally occurring element that can be found at elevated concentrations in groundwater aquifers beneath Argentina, Bangladesh, Chile, China, India, Mexico, and the United States, per a 2018 World Health Organization (WHO) report (WHO, 2018). WHO estimates that at least 140 million people in 50 countries have been exposed to drinking water containing arsenic concentrations above the WHO recommended safe limit and U.S. Environmental Protection Agency (EPA) Maximum Contaminant Level (MCL) of 10 micrograms per liter (μg/L) (MassDEP, 2019).
Too much of a good thing can create new problems as quickly as it resolves old ones. Maintaining a proper balance of antifoaming agents and polymer additives is critical for sustaining the appropriate air bubble size and distribution needed to achieve dissolved oxygen (DO) requirements for neutralizing high biochemical oxygen demand (BOD) in many industrial and food processing wastewater applications.
Kaeser Compressors' rotary screw blowers offer superior performance, fast installation, low noise operation, and lowest life cycle costs to help wastewater treatment plant operators and designers revolutionize their plant's aeration system.
A balanced wastewater process is a beautiful thing — plenty of biochemical oxygen demand (BOD), plenty of O2, and all those hungry little microbes are fat and happy. But what can be done when dissolved oxygen (DO) takes a nosedive and there’s not enough O2 to satisfy industrial and food processing BOD? Here are some preparations to consider before wastewater treatment goes completely out of whack.
When we talk about what’s important in this industry (or our lives, for that matter), several things come to mind — money, for one, can be a dominant stressor, whether that’s from increasing costs or pressures on profitability. Maintaining and adding talent is also problematic. Skills and hiring have reached a critical point.
Wildfire is a natural part of many ecosystems, but recently these fires have become more severe, burning more acres and causing destruction in the western parts of the United States. Recently, U.S. EPA researchers have begun to look at the impact of these fires on our water supply, the natural resource we depend on for drinking, irrigation, fishing, and recreation.
For years, harmful algal blooms (HABs) have posed a threat to drinking water across the country. And now, a tragic incident has illustrated that the problem can have an even more direct effect on our loved ones.
Wastewater plants treat effluent with chlorine as a final disinfection measure prior to its discharge into the environment. While this should be straightforward, there are still a significant number of small water systems facing big problems because they don’t have a solid grasp on the process. The good news is that a modern, cost-effective solution is available.
Late last week, the U.S. EPA sent a letter to officials in Newark, NJ, warning them that residents were exposed to dangerous levels of lead contamination in their drinking water and that the city’s efforts to mediate the crisis weren’t working.
A seawater treatment plant was designed as one of the solutions to the recent water scarcity problems. Fresh and drinkable water isn’t easy to find in some places. As the world’s population grows and industrial production increases, even the largest of the world’s freshwater sources can eventually become strained. Therefore, desalination is meant to expand our sources of water across the world.
Providing safe drinking water is a growing challenge. While methods for the disinfection of bacteria, protozoa and viruses in drinking water are well established, there are certain chemical contaminants of concern resistant to traditional water treatment methods which are being detected in drinking water, and many have the potential to impact public health.
Most agree that Oregon, with its breathtaking mountains and rugged coastline, is a scenic wonder. Yet the geologic forces that make it so spectacular also make it one of the most earthquake-prone spots in the country.
Multi-element, self-cleaning pretreatment filters optimize membrane filter life and production while minimizing maintenance and downtime.
Industrial and population growth continue to outpace the supply of freshwater resources in many regions of the world. The need for additional freshwater resources is driving the need for desalination. When combined with concerns regarding climate change and harmful impacts associated with fossil fuels, desalination powered by renewable energy should be considered as a necessary part of the solution.
With memories of the wettest U.S. spring on record still fresh, it seems strange to hear that in many parts of the nation, groundwater supplies — the water stored underneath our feet, in rocks, and sediments — are lower than normal. This includes places with wet climates, such as southern Georgia, coastal Maryland, and Cleveland.
The City of Greenville (Texas) was experiencing high volume growth and needed a solution to increase pump volume and pressure while working within a limited space. The Grundfos pre-fabricated pump stations cut 3 months off of the anticipated construction time and help Greenville solve those problems.
More than four years after a public health emergency was declared due to lead contamination of drinking water in Flint, MI, communities across the country continue to battle lead service lines (LSLs). In New York, a multimillion-dollar program may help put an end to that struggle.
In water and wastewater treatment, chemistry is king. Treatment options are evaluated depending on the quality of water to be treated and the treatment application. Treatment systems including AOP systems, are designed to specifically target certain contaminants and remove or reduce them from the water. This takes places through the power of chemical reactions. Even biological treatments involve chemistry at their core.
Precision management of dissolved oxygen (DO) allows wastewater treatment plant operators to maintain optimal biological conditions in their activated sludge basins. However, older blowers and a lack of advanced aeration oversight can sabotage that effort while substantially wasting money. Master controls allow the blowers in each basin to be interconnected to improve system stability, provide backup, equalize blower run time, maintain ideal DO levels, and maximize energy efficiency.
Today, the U.S. Environmental Protection Agency (EPA) announced that it is providing a total of $1.2M to the 12 state members of the Hypoxia Task Force (HTF) to help implement state plans to reduce excess nutrients in the Mississippi River/Atchafalaya River Basin.
Today U.S. Environmental Protection Agency (EPA) Administrator Andrew Wheeler signed a final action establishing no new regulatory requirements under the Clean Water Act (CWA) section 311(j)(1)(C) authority for hazardous substance discharge prevention.
The World Health Organization (WHO) recently calls for a further assessment of microplastics in the environment and their potential impacts on human health, following the release of an analysis of current research related to microplastics in drinking-water.
Cath-Tech is pleased to announce the Hexcorder Pro CIPS/DCVG/GPS pipeline integrity survey system has been presented with the NACE Corrosion Innovation of the Year Award 2019 at the recent NACE Corrosion 2019 Conference & Expo held in Nashville, Tennessee March 25 – 28 2019. Cath-Tech staff were thrilled to accept the honor at the opening ceremonies.
It was 83 years ago this week, when 23 car and truck-loads of migrant families were reported to have crossed the California-Arizona border in a single day.
The Water Environment Federation (WEF) proudly announces the 2019 WEF Awards recipients for individuals and organizations that have made outstanding contributions to the sustainability of water resources and made a profound impact on the future of the water profession.
The pumping station at West Stockwith in South Yorkshire provides a lifeline for the farmers and residents along the River Idle, pumping excess water into the River Trent. The station contains four impressive pumps each requiring 3,300 volts to drain the local watercourse.
HOFFMAN & LAMSON multistage centrifugal blowers and smart blower controls will be on display in the Gardner Denver booth at WEFTEC’s 92nd Annual Technical Exhibition and Conference.
Gradiant China, a division of Gradiant Corporation, recently announced contracts with China Everbright and Shaanxi Yanchang Kaiyue CTX to deploy its technologies for treatment of their industrial wastewater.
MGX Minerals Inc. announced recently that engineering partner PurLucid Treatment Solutions (“PurLucid”) has reported commissioning of its first high salinity brine treatment system.
Governor Andrew M. Cuomo and Attorney General Letitia James recently filed a lawsuit against the U.S. Environmental Protection Agency for violating federal law when it issued a "Certificate of Completion" to General Electric Company for its removal of polychlorinated biphenyls from the Hudson River.
Today, the U.S. Environmental Protection Agency (EPA) with four federal partners announced the winners of a technology-accelerating water quality challenge.
Approaches to stormwater have improved dramatically. The details in these stories, bundled together in this free collection of articles, provide detailed examples of leading solutions that have been successfully implemented to help water and wastewater quality managers and plant operators understand sustainable options to address the stormwater dilemma.
Join us in Chicago, Sept. 21-25, to engage with water professionals from around the world, participate in prestigious programming, enhance your professional development skills, and discover innovative technology and solutions to the water sector’s most important issues. Register by July 12 to save.
Aqua-Aerobic Systems, Inc. is a private company servicing its customers around the world with performance-proven, quality products and systems that are adaptable to the changing demands of the water and wastewater treatment industry. Our markets range from small to medium sized municipalities to large metro areas around the world, treating both domestic and industrial waste streams.
Ufuk Erdal, Senior VP/Water Reuse National Technology Director
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