Abstract
Palm kernel shell (PKS) is a by-product in palm oil milling during the extraction of crude palm oil from fresh fruit bunches. PKS is a promising solid fuel to replace coal with its high calorific value. As Japan is moving towards renewable power to reduce carbon dioxide emissions, importing biomass as fuel sources is trending. In the past decade, PKS has been imported extensively into Japan for biomass-power generation, replacing fossil fuels under the feed-in tariff. PKS is easiest to utilize in existing power plants from an economic perspective reducing the cost for energy transition. However, the environmental impact of transporting such biomass across long distances have not been systematically assessed. Therefore, this work presents a life cycle assessment (LCA) of power generation with PKS in Japan. The LCA study covers land conversion of palm cultivation in Malaysia to biomass power generation in Japan. Factors considered include greenhouse gas (GHG) emissions, eutrophication and water footprint. Eight Malaysian scenarios were analyzed, based on different boiler fuel applications in the palm oil mill. In addition, eight Japanese scenarios were also considered, based on imported PKS-dominant and local woodchip-dominant power generation. This work noted the significant effect of land use change on GHG emission. Based on results, imported PKS-dominant power generation in Japan is environmentally favorable than local woodchip-dominant power generation with careful selection of the biomass mix and power plant scale. PKS-based power generation contributes low GHG emissions which superior to fossil-based (coal, thermal oil, natural gas) power in Japan.
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All data generated or analyzed during this study are included in this published article and its supplementary information file.
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Abbreviations
- α:
-
Leaching run-off fraction
- AGB:
-
Aboveground biomass
- BGB:
-
Belowground biomass
- C act :
-
Actual pollutant concentration of intake water
- C effl :
-
Pollutant concentration in effluent
- C max :
-
Maximum acceptable pollutant concentration
- C nat :
-
Natural concentration of pollutant
- COD:
-
Chemical oxygen demand
- CPO:
-
Crude palm oil
- DOM:
-
Dead organic matter
- EFB:
-
Empty fruit bunch
- Effl :
-
Effluent
- ET :
-
Evapotranspiration
- FFB:
-
Fresh fruit bunch
- FIT:
-
Feed-in tariff
- GHG:
-
Greenhouse gas
- GWP:
-
Global warming potential
- HFO:
-
Heavy fuel oil
- JP:
-
Japan
- lgp :
-
Period of growing
- LPS:
-
Low-pressure steam
- LUC:
-
Land use change
- ML:
-
Malaysia
- PEFB:
-
Pressed EFB
- PKS:
-
Palm kernel shell
- POM:
-
Palm oil mill
- POME:
-
Palm oil mill effluent
- PPF:
-
Pressed palm fiber
- t:
-
Metric ton
- t-CO2 eq:
-
Ton of carbon dioxide equivalent emission
- TP:
-
Total phosphorus
- WF:
-
Water footprint
- wt%:
-
Percentage by weight
- Y :
-
Crop yield
- yr:
-
Year
- ΔC:
-
Carbon stock change in ton carbon per year
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Funding
Part of this study was financially supported by the Japan Society for the Promotion of Science (JSPS) KAKENHI (Young Scientists A) [Grant Number 16H06126], and the Environment Research and Technology Development Fund [Grant Number 2-1910]. Activities of the Presidential Endowed Chair for “Platinum Society” at the University of Tokyo are supported by the KAITEKI Institute Incorporated, Mitsui Fudosan Corporation, Shin-Etsu Chemical Co., ORIX Corporation, Sekisui House, Ltd., the East Japan Railway Company, and Toyota Tsusho Corporation.
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All authors contributed to the study conception and design. All authors commented on previous versions of the manuscript. All authors read and approved the final manuscript. Conceptualization: Disni Gamaralalage, Yuichiro Kanematsu, Yasunori Kikuchi, Denny Ng. Methodology: Disni Gamaralalage, Yuichiro Kanematsu, Yasunori Kikuchi. Formal analysis and investigation: Disni Gamaralalage, Yuichiro Kanematsu. Writing—original draft preparation: Disni Gamaralalage, Yasunori Kikuchi. Writing—review and editing: Disni Gamaralalage, Dominic Foo, Viknesh Andiappan, Denny Ng, Yuichiro Kanematsu, Yasunori Kikuchi. Funding acquisition: Yasunori Kikuchi. Resources: Viknesh Andiappan, Denny Ng, Yasunori Kikuchi, Steve Foong. Supervision: Yasunori Kikuchi.
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Gamaralalage, D., Kanematsu, Y., Ng, D.K.S. et al. Life Cycle Assessment of International Biomass Utilization: A Case Study of Malaysian Palm Kernel Shells for Biomass Power Generation in Japan. Waste Biomass Valor 13, 2717–2733 (2022). https://doi.org/10.1007/s12649-021-01643-3
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DOI: https://doi.org/10.1007/s12649-021-01643-3