Displaying items by tag: Coal ash
Charah Solutions wins ash marketing contract from Dominion Energy for coal ash from power plant in Virginia
18 January 2021US: Charah Solutions has been awarded a marketing contract by Dominion Energy for the beneficiation and utilisation of up to 8.1Mt reclaimed ponded coal ash at its Chesterfield Power Station in Chester, Virginia. The contract will run from 2021 until 2032. It follows local state legislation requiring the power company to remove coal ash from sites at the Chesterfield Power Station within 15 years.
As part of the agreement, Charah Solutions will install processing and transportation infrastructure in 2021 to facilitate rail transportation of the ash from Chesterfield Power Station to cement kiln feed markets. The beneficiated ash product will replace other currently utilised virgin raw materials in the production of Portland cement at multiple cement kiln locations in the eastern US for the next decade and beyond, and help supply the growing demand for concrete in the construction industry.
US: Georgia Power will begin dewatering three ash ponds at its Mitchell power plant in Albany, Georgia. The company says that the coal ash will be used in local cement production.
Environmental and natural resources vice president Mark Berry said “As we begin the dewatering process at Plant Mitchell, we continue to focus on safety and meeting all requirements throughout the process to fulfill our longstanding commitment to protect the environment, our local communities and water quality every step of the way." He added “Throughout the process, clear communication to our customers and the community about our progress remains a priority."
With the Plant Mitchell project, approximately 2Mt of stored coal ash will be removed from the existing ash ponds for reuse in cement manufacturing. The project at Plant Mitchell marks the first time that stored ash from existing ash ponds at sites in Georgia will be excavated for beneficial reuse as part of an ash pond closure project. At present Georgia Power recycles more than 85% of all ash and gypsum, including more than 95% of fly ash, it produces from current operations for various beneficial reuses such as concrete production as well as other construction products.
South Korea: The Korea Cement Association (KCA) says its members will increase the use of coal ash from local thermal power plants or source alternative raw materials from domestic clay mines. The decision follows a trade dispute between South Korea and Japan, according to the Aju Business Daily newspaper.
The Environment Ministry started to tighten rules concerning the import of coal ashes from Japan in August 2019 citing fears of radioactive and heavy metal contamination. Importers are now required to submit an authorised radioactive inspection report and the analysis of heavy metal components. The KCA said its members use 3.15Mt/yr of coal ash and 1.28Mt/yr is imported from Japan.
US: Environmental Protection Agency (EPA) is considering making changes to the regulations managing coal combustion residuals (CCR), or coal ash, as non-hazardous waste under the Resource Conservation and Recovery Act (RCRA). The agency has granted two petitions to look at the existing rules.
“In light of the EPA’s new statutory authority, it is important that we give the existing rule a hard look and consider improvements that may help states tailor their permit programs to the needs of their states, in a way that provides greater regulatory certainty, while also ensuring that human health and the environment remain protected,” said EPA Administrator Scott Pruitt.
The current regulations took effect in late 2015 and manage how coal ash generated from electric utilities and independent power producers is managed and disposed of in surface impoundments and landfills. The rule also defines what constitutes beneficial use of CCR and, therefore, is excluded from the rule’s requirements. Coal ash is used in a variety of industries including cement production.
US: According to Charlotte Business Journal, Duke Energy has proposed excavating 12 more of its 36 coal ash ponds in North and South Carolina and burying the waste in a fully-lined landfills or structural fill projects.
To date, Duke has proposed closure plans for 24 of the 36 ash ponds. In every case, it has proposed excavation and reburial. However, Garry Miller, head of closure engineering for Duke, said that might not be the case for the remaining 12 ponds. He said that the engineering work that remains to be done at those plants could yet show that a 'cap in place' process, which critics have said would be insufficient to protect against further contamination of groundwater, can effectively close them.
Miller said that none of the waste ash from Duke's 36 ash ponds would undergo beneficial reuse, the process of using the ash for commercial products such as a replacement for Portland cement in concrete and gypsum board. However, he added that Duke does send a portion of the dry ash it is currently producing at its largest plants for reuse. However, the time constraints imposed by North Carolina's Coal Ash Management Act of 2014 make it impossible for the existing ash ponds. "As we close these basins, the quantity in them is such that the market cannot handle it in a timely manner," said Miller.
Duke's current cost estimate for closing the ponds is US$3.4bn, although this is subject to revision.