Investigation of co-combustion characteristics of distillery sludge and sugar mill waste: kinetics, synergy, and ash characterization

Vikash Singh (), Seon Yeong Park (), Eun Seo Lee, Jun Ho Choi, Chang Gyun Kim () and Vimal Chandra Srivastava
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Vikash Singh: INHA University
Seon Yeong Park: INHA University
Eun Seo Lee: INHA University
Jun Ho Choi: INHA University
Chang Gyun Kim: INHA University
Vimal Chandra Srivastava: Indian Institute of Technology Roorkee

Environment, Development and Sustainability: A Multidisciplinary Approach to the Theory and Practice of Sustainable Development, 2024, vol. 26, issue 8, No 84, 21217-21236

Abstract: Abstract The co-combustion characteristics and synergy of distillery effluent sludge (DES) and sugar mill waste (SMW) were studied by thermogravimetric (TG) analysis. TG data were used to evaluate the combustion indices, synergy, kinetic parameters, and heterogeneous reaction mechanisms. The blend D1S3 (25% DES and 75% SMW) exhibited optimal combustion parameters (Ci = 2.69 × 10−4% min−3, Cb = 1.34 × 10−6% min−4, and CCI = 13.02 × 10−7%2 °C−3 min−2). Mixing DES with SMW resulted in a positive synergy that facilitated effective combustion owing to the presence of Fe, Ca, and Mg in DES, which served as catalysts during combustion. For D1S3, the apparent activation energy (*Ea) calculated using FWO, KAS, and ST iso-conversional methods were 173.3, 172.4, and 172.7 kJ mol−1, respectively. The master plots revealed that the combustion process was governed by the D1, D3, F2, and F3 solid-state kinetic models in different conversion (α) ranges for the wastes and their blends. Finally, the presence of alkaline and alkaline-earth elements (Na, K, Mg, and Ca) was confirmed through ash characterization. Thus, the ash can be considered a possible supplementary cementing material for end-use applications.

Keywords: Distillery effluent sludge; Press mud; Co-combustion; Synergy; Kinetics (search for similar items in EconPapers)
Date: 2024
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DOI: 10.1007/s10668-023-03525-1

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