Details
| Original language | English |
|---|---|
| Pages (from-to) | 4729-4743 |
| Number of pages | 15 |
| Journal | BIOMASS CONVERSION AND BIOREFINERY |
| Volume | 12 |
| Issue number | 10 |
| Early online date | 17 Sept 2020 |
| Publication status | Published - Oct 2022 |
Abstract
Urban organic wastes (UOW) strain the infrastructures for solid waste treatment (SWT) in emerging economies. This study investigated biochar gained from three major UOW sources in India—banana peduncles (BP), a fibrous waste, from fruit markets; sewage sludge (SS) from wastewater treatment plants; and anaerobic digestate (AD) from food and market waste processing facilities—in terms of its potential to sequester and become long-term carbon sink in soils. Herein, the chemical properties (using ATR-FTIR) and thermal oxidative stability (using TGA) of biochars derived from these UOW and their three blends were examined. Biochar from SS and AD and the blends were found to possess more ash content, Cl, and alkali and alkaline earth metals (AAEM) than that from BP. The conventional recalcitrance index (R 50) could not quantify and compare the stability of these mineral- and ash-rich biochars. Hence, a modified thermal oxidative recalcitrance index (TOR i) is proposed. All the biochar from blends prepared at highest treatment temperature of 650 °C shows similar aromaticity. However, biochar from blend of 50% SS, 30%BP, and 20% AD exhibits the highest recalcitrance (TOR i = 0.193) to become a long-term carbon sink in soil. More than aromaticity, the influence of Si, Fe, and AAEM on the biochar matrix affects its recalcitrance. Variations in the structural properties and recalcitrance of biochars from blends are attributable to the synergy among their constituents SS, AD, and BP. The determined TOR i confirms the potential of biochar from the blends of UOW as a long-term carbon sink.
Keywords
- Sewage sludge, Anaerobic digestate, Banana peduncles, Biochar, Thermal oxidative recalcitrance, Carbon sink
ASJC Scopus subject areas
Sustainable Development Goals
Cite this
- Standard
- Harvard
- Apa
- Vancouver
- BibTeX
- RIS
In: BIOMASS CONVERSION AND BIOREFINERY, Vol. 12, No. 10, 10.2022, p. 4729-4743.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Biochar from co-pyrolysis of urban organic wastes-investigation of carbon sink potential using ATR-FTIR and TGA
AU - Nair, Rahul Ramesh
AU - Mondal, Moni M.
AU - Weichgrebe, Dirk
N1 - Funding Information: Open Access funding enabled and organized by Projekt DEAL. This work was funded by the Indo-German Science & Technology Centre (IGSTC) through the project PYRASOL (No. 60451530) under the 2 + 2 scheme, Ministry of Education and Research Germany (BMBF), and German Academic Exchange Service (DAAD). Acknowledgments
PY - 2022/10
Y1 - 2022/10
N2 - Urban organic wastes (UOW) strain the infrastructures for solid waste treatment (SWT) in emerging economies. This study investigated biochar gained from three major UOW sources in India—banana peduncles (BP), a fibrous waste, from fruit markets; sewage sludge (SS) from wastewater treatment plants; and anaerobic digestate (AD) from food and market waste processing facilities—in terms of its potential to sequester and become long-term carbon sink in soils. Herein, the chemical properties (using ATR-FTIR) and thermal oxidative stability (using TGA) of biochars derived from these UOW and their three blends were examined. Biochar from SS and AD and the blends were found to possess more ash content, Cl, and alkali and alkaline earth metals (AAEM) than that from BP. The conventional recalcitrance index (R 50) could not quantify and compare the stability of these mineral- and ash-rich biochars. Hence, a modified thermal oxidative recalcitrance index (TOR i) is proposed. All the biochar from blends prepared at highest treatment temperature of 650 °C shows similar aromaticity. However, biochar from blend of 50% SS, 30%BP, and 20% AD exhibits the highest recalcitrance (TOR i = 0.193) to become a long-term carbon sink in soil. More than aromaticity, the influence of Si, Fe, and AAEM on the biochar matrix affects its recalcitrance. Variations in the structural properties and recalcitrance of biochars from blends are attributable to the synergy among their constituents SS, AD, and BP. The determined TOR i confirms the potential of biochar from the blends of UOW as a long-term carbon sink.
AB - Urban organic wastes (UOW) strain the infrastructures for solid waste treatment (SWT) in emerging economies. This study investigated biochar gained from three major UOW sources in India—banana peduncles (BP), a fibrous waste, from fruit markets; sewage sludge (SS) from wastewater treatment plants; and anaerobic digestate (AD) from food and market waste processing facilities—in terms of its potential to sequester and become long-term carbon sink in soils. Herein, the chemical properties (using ATR-FTIR) and thermal oxidative stability (using TGA) of biochars derived from these UOW and their three blends were examined. Biochar from SS and AD and the blends were found to possess more ash content, Cl, and alkali and alkaline earth metals (AAEM) than that from BP. The conventional recalcitrance index (R 50) could not quantify and compare the stability of these mineral- and ash-rich biochars. Hence, a modified thermal oxidative recalcitrance index (TOR i) is proposed. All the biochar from blends prepared at highest treatment temperature of 650 °C shows similar aromaticity. However, biochar from blend of 50% SS, 30%BP, and 20% AD exhibits the highest recalcitrance (TOR i = 0.193) to become a long-term carbon sink in soil. More than aromaticity, the influence of Si, Fe, and AAEM on the biochar matrix affects its recalcitrance. Variations in the structural properties and recalcitrance of biochars from blends are attributable to the synergy among their constituents SS, AD, and BP. The determined TOR i confirms the potential of biochar from the blends of UOW as a long-term carbon sink.
KW - Sewage sludge
KW - Anaerobic digestate
KW - Banana peduncles
KW - Biochar
KW - Thermal oxidative recalcitrance
KW - Carbon sink
UR - http://www.scopus.com/inward/record.url?scp=85091165436&partnerID=8YFLogxK
U2 - 10.1007/s13399-020-01000-9
DO - 10.1007/s13399-020-01000-9
M3 - Article
VL - 12
SP - 4729
EP - 4743
JO - BIOMASS CONVERSION AND BIOREFINERY
JF - BIOMASS CONVERSION AND BIOREFINERY
SN - 2190-6815
IS - 10
ER -