Investigation of Emissions Released During the Combustion of Coal Briquettes Produced from Distillery Stillage and Paraffin Waste

Abstract

This article presents the results of analytical research on the formation of smoke and exhaust gases during the combustion of coal briquettes produced with the addition of binding agents. Separate briquettes were prepared using distillery stillage and paraffin waste, and the emissions generated during combustion were analysed in accordance with standard Maximum Allowable Concentration (MAC) requirements. During the experimental study, the variable parameters were defined as follows: screw press with variable-pitch auger and nozzle diameter of Dnozzle = 25 mm, pressing force Fpress= 2.4 kN, working chamber diameter Dchamber= 100 mm, and a moisture and binder content of 15%. The distillery stillage had a 17% water content, while the paraffin waste had 15% water content. These components were used as part of the briquetting mixture to evaluate their combustion behaviour and associated emissions. The experimental findings include quantitative data on smoke density, ash content, and concentrations of harmful gases such as carbon monoxide (CO) and sulfur dioxide (SO₂), all measured against environmental safety standards.