ash pond Articles

  • Geochemical studies to delineate topsoil contamination around an ash pond of a coal-based thermal power plant in India

    In the present study, an attempt was made to delineate soil contamination around the ash pond of a coal-based thermal power plant. The topsoil in the study area was found to be contaminated to varying degrees from ash disposal. The soil drawn from various profiles was largely contaminated by ash fall out, predominantly in the prevalent wind direction. Pb, Zn, Cu, Ni, Co, Mn, Cr, V and Ba were ...


    By Springer

  • Low-permeability liner solution for coal-ash by-products

    PROJECT: TVA Kingston Gypsum Pond Expansion LOCATION: Harriman, Tennessee PRODUCTS: BENTOMAT® 600CL BENTOMAT® CL EASY ROLLER™ Deployment System BACKGROUND: As part of its emissions control at the Kingston Fossil Plant, flue gas desulfurization is performed, which creates as a by-product a synthetic ...


    By CETCO

  • Legal lookout: competing coal ash proposals

    Depending upon comments the EPA gathers, industry may have to or not have to close out their coal ash containment ponds within five years. On May 4, 2010, EPA issued its long-awaited proposal to manage coal ash – the byproduct of burning coal to generate power. The agency proposed two quite different approaches for regulating coal ash, somewhat to the consternation of critics, who had hoped ...


    By Bergeson & Campbell, P.C.

  • Legal lookout: EPA responds to coal ash release

    Once again, it took a major catastrophe to wake up industry and regulators to a problem that should have been addressed long ago. Dec. 22, 2008, was a nightmare for federal and state regulators, electrical utilities, and most particularly the residents of Kingston, Tenn. On this day, approximately 5.4 million cubic yards (or 1.1 billion gallons) of coal ash from the Tennessee Valley Authority ...


    By Bergeson & Campbell, P.C.

  • Comparative study of body composition of four fish species in relation to pond depth

    Abstract Fish specimen of Labeo rohita, Cirrhinus mrigala, Hypophthalmicthys molitrix and Catla catla were sampled from three ponds of different depths (152 cm, 122 cm and 76 cm) to compare the body composition of these species in relation to pond depth. There was significant (P ...

  • Fly Ash Concrete design for Chicago’s 100-Year road structure case study

    After years of heavy use, Wacker Drive, a major two-level viaduct in downtown Chicago, Illinois needed to be rebuilt. The Chicago Department of Transportation (CDOT) set ambitious goals for the $200 million concrete structure because of its central location and importance to downtown traffic flow. The end result is a more durable roadway with a service life of 75 to 100 years. Originally built ...


    By Headwaters, Inc.

  • Electro-coagulation treatment efficiency of graphite, iron and aluminum electrodes using alum and wood ash electrolytes on a Kraft pulp and paper mill effluent

    Specific power consumption and reduction of BOD, COD, TS, pH, and chemical elements were used to determine the treatment efficiency of Fe, graphite and Al electrodes with alum and wood ash as supporting electrolytes on the effluent from a Kraft pulp and paper mill in Kenya. Five sampling points were selected along mill's effluent treatment system: primary settling tank (SP1), first aerated lagoon ...


    By IWA Publishing

  • Dewatering bin carryover study

    Bottom ash dewatering bins (hydro-bins) at coal fuel utility plants allow ash material to carry over to ash settling ponds, or in the case of closed loop systems, re-circulate suspended ash solids, resulting in the following problems: Frequent and expensive dredging of settling ponds Excessive wear on system components caused by re-circulating suspendedsolids Labor intensive manual ...


    By Entech Design, Inc.

  • Easy roller deployment system puts installation back on schedule

    PROJECT: Coal Ash Disposal - Midwest Utility LOCATION: Central Illinois PRODUCTS: BENTOMAT® SDN, EASY ROLLERTM DEPLOYMENT SYSTEM BACKGROUND: The increased use of coal to generate electricity has brought with it an increased amount of coal combustion by-products (CCBs). Metal ions released from these CCBs can be harmful to ...


    By CETCO

  • Customer comparison of Rotomite-6000 to competitive products-case study

    Crisafulli Sales Engineer's field report (May 2003) The Rotomite-6000 was a pleasure to operate. We dredged bottom ash and silt. The Rotomite Cobra Cutterhead's down pressure and articulation capabilities make the Rotomite-6000 effective against crusted sludge. The Customer had an unsatisfactory experience with a competitor's dredge, which they had rented the prior year: the ...


    By SRS Crisafulli, Inc.

  • Coal-fired power on the way out?

    The past two years have witnessed the emergence of a powerful movement opposing the construction of new coal-fired power plants in the United States. Initially led by environmental groups, both national and local, it has since been joined by prominent national political leaders and many state governors. The principal reason for opposing coal plants is that they are changing the earth’s climate. ...


    By Earth Policy Institute

  • Dredging Q+A: Top 8 Questions Answered

    We strive to provide our customers with as much information as they need to make informed decisions about the dredging equipment they choose. So we compiled some of the questions (and answers!) asked most frequently for your quick review. Q: What kinds of dredges does SRS Crisafulli make? A: SRS Crisafulli produces hydraulic ...


    By SRS Crisafulli, Inc.

  • Controlling Stack Emissions in the Wood Products Industry

    Electrostatic precipitation has been a reliable technology since the early 1900's. Originally developed to abate serious smoke nuisances, the manufacturers of zinc, copper, and lead quickly found electric gas cleaning a cost efficient way to recover valuable product carried out of the stacks from furnace operations. Today electrostatic precipitators are found mainly on large power plants, cement ...


  • Deadly Hexavalent Chromium in Soil

    Merging technologies will change over Hexavalent Chromium in soil to Trivalent Chromium, effectively stopping Hexavalent Chromium from becoming dangerously airborne or becoming even more deadly by migrating into the water table. There are three valences of Chromium: 1) Chromium—safe to humans, 2) Trivalent Chromium—safe and an essential element in humans and 3) Hexavalent ...


    By ABCOV Companies

  • Dredging at weldon spring super fund project Morrison Knudsen - St. Charles, Missouri, USA

    Remote controlled Dredging proved to be the best method of removing radioactive sludge from settling ponds of a former uranium processing plant near St. Charles, Missouri. Dredging keeps the material wet and out of contact with the atmosphere throughout the removal and treatment process, eliminating the danger of contaminates becoming airborne. The Weldon Spring Site Remedial Action Project ...

  • Water Sustainability

    I7.1  | Water Optimization – 30% Groundwater Use Reduction Tabatha Pellerin, Senior Program Manager, AECOM AECOM assisted the Entergy Lewis Creek gas/coal fired electric power plant with water conservation efforts prompted by a goal of 30% ...

  • Prized Maya Biosphere is Under Attack

    In the sweltering, midday heat of the Petén, Guatemala’s largest province, workers are stringing barbed wire to posts along a dirt road that borders a swath of open land. This land was forest until just a few weeks ago, when someone set a fire that reduced the trees to ashes. Since then, a hole has been dug for a pond. Once grass takes root in the open space and water fills the pond hole, the ...


  • Stormwater Management for Urban Environments

    IntroductionElmhurst College, a hundred-thirty-five year old private learning institution, is proceeding with a campus redevelopment project that will include a one hundred seventy bed residence hall. In addition, the college continues to be a role model for sustainable site design and an educational resource for both students and the community.The need for additional housing, due to ...


    By Advanced Pavement Technology

  • Sustainable food production: Facts and Figures

    Farming must feed more people more sustainably. Zareen Bharucha looks at scientific approaches past and present. Advances in agricultural science and technology (S&T) have contributed to remarkable increases in ...


    By SciDev.Net

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