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Title: A study on the potential uses of bottom and fly ash in Mauritius

Authors: Mohammad Emamdee; Sindra L. Summoogum-Utchanah

Addresses: Department of Chemical and Environmental Engineering, Faculty of Engineering, University of Mauritius, Reduit, Mauritius ' Department of Chemical and Environmental Engineering, Faculty of Engineering, University of Mauritius, Reduit, Mauritius

Abstract: Faced with demographic explosion and fuelled by its endeavours to become developed, Mauritius has seen a hike in its electricity consumption pattern. The bulk of electricity is generated by burning solid fuels which are namely coal and sugarcane bagasse. Consequently, ash is produced as waste product. Till date, both coal and bagasse ashes are being disposed of in a very unsustainable manner. Due to the availability of numerous studies on coal ash, focus has been laid on bagasse ash. This study analyses the possible ways of valorising bagasse bottom ash (BBA) and bagasse fly ash (BFA) better suited for the Mauritian context. A series of laboratory tests namely moisture content (MC), pH, electrical conductivity (EC), loss on ignition (LOI) and monitoring of the leaching behaviour of phosphate and nitrate were carried out. To monitor the leaching behaviour of nitrate and phosphate, a leaching model has been developed. Following the experimental analysis, several potential utilisation are put forward.

Keywords: bagasse bottom ash; BBA; bagasse fly ash; BFA; moisture content; loss of ignition; LOI; leaching; Mauritius.

DOI: 10.1504/IJEWM.2019.096546

International Journal of Environment and Waste Management, 2019 Vol.23 No.1, pp.54 - 72

Received: 17 Aug 2017
Accepted: 02 May 2018

Published online: 11 Oct 2018 *

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