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A comparative study on the zeolitization of coal fly ash from thermo-power plant “Maritsa 3” (Dimitrovgrad) with KOH and NaOH solutions of different concentrations has been made. The initial materials have been activ ated by application of “conventional” method of hydrothermal treatment at temperatures near 100 °C, atmosphere pressure and liquid/solid ratio of 10 ml.g -1. Three concentration levels for KOH and four concentration levels for NaOH have been used. The initial fly ashes and the obtained zeolit...

The process of alkaline hydrothermal activation (with NaOH) of fly ash from Bulgarian coal-burning thermo-power plant “Maritsa 3” has been investigated by means of scanning electron microscopy and energy-dispe rsive X-Ray analyses. The stages of the zeolitization have been discusse d on the base of the obtained data for the morphology and composition of typical in dividual particles from th e zeolitized fly ash samples, synthesized at different trea tment duration. The influences of pre-treatment and post- tre...

A trans-regional project, WasteKIT, devoted on the economic development via waste management, based on knowledge and integration has been presented. The project puts together 18 different waste management related organizations from Sofia region (Bulgaria), Emilia Romagni region (Italy), Am sterdam region (Netherlands), Yorkshire and Humber (Great Britain) including resear ch and education organizations, SMEs and local authorities in order to e xpand the ambitions of region s with respect to regional economic devel...