PROPERTIES OF AMMONIUM SULPHATE FROM MARITZA EAST TPP E-BEAM DESULPHURISATION UNIT

摘要

The new desulphurisation facilities of Maritza East-2 TPP generate ammonium sulphate as process by-product. Proper management practice should be applied in order to comply with environmental legislation both for air pollution and waste management. In the present paper the physical, chemical and thermal properties of different ammonium sulphate samples are investigated. Legal basis for its application in agriculture is taken into consideration. Thermal analysis is performed and available solid phases are confirmed by the stages and rate of weight changes and by enthalpy changes at different temperatures. On the basis of the data obtained, speculation on chemical components and transformations in samples are done. Thermal analysis confirms the similarity of ammonium sulphate from desulphurisation facility with pure per analysis grade. The content of nutrients and impurities are determined by using different methods and techniques. Conductivity and pH of water solutions are also determined on the way to assess the potential use of the by-product as fertiliser.