Water

Regulatory agencies are becoming more and more critical of phosphorus-based water treatment chemicals because they can have a negative impact on lakes and waterways. In the past, treating cooling water with

Flow reversal in piping systems can degrade equipment performance and cause significant water hammer, potentially resulting in catastrophic failure. Power plant condenser cooling water systems—or circulating

The Edward Hyatt hydroelectric plant at the damaged Oroville Dam in northern California, shut down earlier this month after its spillway nearly collapsed, may reopen soon, officials with the California Department of Water Resources (DWR) said on March 1. The plant was forced to shut down after severe erosion from the dam’s spillway deposited large […]

An executive order signed by President Donald Trump on February 27 authorizes the Environmental Protection Agency (EPA) to rewrite a contentious rule asserting federal authority over small bodies of water. The Waters of the U.S. (WOTUS) rule, also known as the “Clean Water Rule,” finalized by the EPA and the U.S. Army Corps of Engineers […]

Many informative articles have been published about options for treating flue gas desulfurization wastewater, but new technologies are rapidly changing the treatment possibilities. This article reviews key economic considerations and introduces an innovative treatment solution that lowers costs and the amount of waste generated. Flue gas desulfurization (FGD) wastewater varies widely depending on the source […]

Cooling towers serve the vital role of cooling water for power plant heat exchange equipment. Sustaining excellent system performance is important because a one-degree increase in water temperature can cause a 2% increase in energy usage. Proper maintenance and a few upgrades could improve a cooling tower’s efficiency, while also saving water in the process. […]

Using reclaimed water as a makeup supply for cooling tower systems has become a popular option for reducing impacts on local water resources, but it comes with its own challenges because of its unique

Power generation need not be another source of strain on diminishing freshwater resources. Well-established water reclamation technologies are enabling producers to conserve resources—and money. Meeting the

Meeting the requirements of the Effluent Limitations Guidelines (ELG) means careful consideration of the various options. Both biological treatment and zero liquid discharge (ZLD) approaches have their place, but ZLD may offer more flexibility for the future. On September 30, 2015, the Environmental Protection Agency (EPA) issued the final effluent limitation guidelines (ELGs) rule for […]

A variety of approaches have been used to capture new benefits from combined heat and power (CHP) facilities. Some owners have transitioned to new fuels or added renewables to the mix, while others have implemented unique business models to spur development. As district heating systems are brought into the 21st century, the CHP sector seems […]

Compliance with one of the latest federal environmental regulations, the Effluent Limitations Guidelines (ELG), can be both costly and complicated. A newly available option offers features and capabilities that may make it a more attractive alternative than conventional approaches. In September 2015, the U.S. Environmental Protection Agency (EPA) finalized a new rule affecting flue gas […]

The Mátra Power Plant in Visonta, Hungary, uses a dense slurry system for handling fly ash and other coal combustion residuals. The DSS combines ash and water in a 1:1 ratio, creating a cement-like slurry. [gss ids=”93802,93804,93832,93808,93834,93836,93838,93840,93842,93844,93822,93846,93848,93850″]

According to a Duke University study, future climate warming will likely cause only minor reductions in power output at most U.S. coal- and gas-fired power plants.

To satisfy China’s more stringent water use and air pollution rules, developers of the new 1.3-GW ultrasupercritical coal-fired Changxing Power Plant used a novel forward osmosis–based brine concentration

A severe water crisis gripping India this year has forced several of the country’s hydroelectric and thermal power plants to shut down. At least 10 of India’s 29 states have been stricken by severe drought after the monsoons failed for two seasons in a row (as of the start of July, the monsoons had still […]

When commissioning a new power plant, requirements for purified water can be large—often more than an unfinished plant can supply. When it’s time to bring in outside help, proper planning can help avoid problems and keep budgets under control. With all the complexity inherent in the commissioning of a power plant, the last thing anyone […]

Droughts attributed to the El Niño phenomenon have gripped Venezuela’s neighbor Colombia. Bogotá in April prepared to ration power and instituted mandatory reductions in consumption, warning that

Oil-rich Venezuela is gripped by a power crisis so debilitating that the government has instituted four-hour daily blackouts across most of the country, forced hotels and malls to generate their own power, and

Hands down, 2015 was a record year for global investment in renewable energy. Excluding large hydroelectric projects, the amount of money committed to renewables rose 5%, to $285.9 billion, exceeding the previous record of $278.5 billion reached in 2011.

Keeping a power plant’s surface condenser in proper working order requires paying attention to balance-of-plant systems as well. Failure to monitor and maintain cooling towers and vacuum pumps in particular can lead to performance penalties or worse. The surface condenser at a power plant has a significant effect on power generation—specifically, the efficiency with which […]

By an 85-12 vote, the U.S. Senate passed the first comprehensive energy bill in nearly a decade, bringing a successful conclusion to months of legislative effort and overcoming a series of roadblocks in the full Senate related to the water quality crisis in Flint, Mich. The product of more than a year of bipartisan work […]

Subcommittees of the U.S House of Representatives and the U.S. Senate separately advanced appropriations bills that lay out funding priorities for the Department of Energy (DOE) and other energy-related measures for 2017. The House Energy and Water Subcommittee, a panel of the Appropriations Committee, passed a $37.4 billion bill to fund the DOE as well […]

Entergy Tests Fiber Optic Cables to Slash Copper Use A unique pilot under way at a substation in New Orleans, La., uses fiber optic cables in a way that could help utilities reduce the use of copper wire. But

Two environmental groups on March 22 filed a notice of intent to sue Florida Power & Light (FPL) in federal court over leaks from the utility’s Turkey Point Nuclear Plant south of Miami that have raised concerns about contamination of area drinking water. The problems began several years ago, after FPL completed an uprate at Turkey […]

It’s been five years since the Great Tohoku Earthquake and tsunami prompted a crisis at the Fukushima Daiichi nuclear plant in Japan, but the world’s nuclear power sector is still lurching from its aftershocks. The Crisis at Daiichi Endures Five years ago, nearly a day after the 3-minute, 9.0-magnitude Great Tohoku Earthquake struck northeastern Japan—and unleashed […]

Construction of a 50-MWt plant that will demonstrate a novel oxyfuel natural gas power system using Allam Cycle technology with zero atmospheric emissions has kicked off in La Porte, Texas. The demonstration plant is being built by the technology’s developer, Durham, N.C.–based NET Power, along with Exelon Generation, CB&I, and 8 Rivers Capital. NET Power’s […]

In a growing number of regions, power plants are competing with many other users for scarce freshwater supplies, and the situation is likely to get worse. The International Energy Agency (IEA) recently

At the ballyhooed Paris climate conference last December, a little-noticed event occurred that could lead to important developments for electric generators. At the Paris meeting, some 80

In late 2015, the U.S. Environmental Protection Agency (EPA) published new regulations governing wastewater discharge from steam electric power plants. These new regulations, or effluent limitation guidelines