Remediation of Fly Ash Landfills Through Plantation

In India, a significant area of land is occupied by preexisting coal-fired thermal power plants (TPPs) for the storage of fly ash slurry in ash ponds. However, the area available for storage of fly ash at these TPPs is limited. In addition, this type of fly ash disposal poses a problem due to restricted land availability and potential contamination issues. A viable alternative is the reclamation of fly ash ponds by plantation. A study at the Ramagundam Super Thermal Power Station (RSTPS) in Andhra Pradesh, India, on reclamation of a portion of an ash-filled, low-lying area has been performed. This article describes the characteristics of the RSTPS pond ash, ash leachates, and improvements in the fertility status of the reclaimed area over a three-year period. Furthermore, morphometric observations of different planted species indicate that these types of ash-filled, low-lying areas can be suitably reclaimed and the nutrient-rich leachate from ash-filled areas potentially can be used for irrigation purposes. (C) 2008 Wiley Periodicals, Inc.