Environmental and economic assessment of crop residue competitive utilization for biochar, briquette fuel and combined heat and power generation

Chunying Ji, Kun Cheng, Dali Nayak, Genxing Pan (Corresponding Author)

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Competitive utilization of straw is a challenge faced by developing countries such as China with the increase of crop production. Biochar, briquette fuel and combined heat and power generation are the three main new measures for straw utilization in recent years; however, there is still a knowledge gap for environmental and economic effects of these utilizations in China. To address this issue, combined lifecycle analysis and cost-benefit analysis was employed to assess the environmental impacts and economic benefits of biochar, briquette fuel and combined heat and power generation applications based on three cases in China. The results suggested that biochar was the most promising technology for straw utilization in China for its highest greenhouse gas mitigation potential i.e. -0.94 t CO2 equivalent (CO2e) per ton straw utilized and high profit with a net present value per ton straw of 20.98 U.S. dollars with the baseline of crop straw return including carbon revenue. Briquette fuel also deserves to achieve a best net present value ratio of 5.06 and GHG abatement potential being -0.9 t CO2e t-1 straw. However, the waste of straw ash could bring some pollution risk without suitable treatment. The economic potential of the combined heat and power generation project that produces bioelectricity, is not considerable with a very low net present value ratio of 0.007 and a mitigation potential of -0.03 tCO2e t-1 straw due to low energy utilization efficiency of direct combustion. Biochar could be one of the most potential economic and environmental sustainable straw utilization technologies in China though the wide production and application is still a big challenge in future.
Original languageEnglish
Pages (from-to)916-923
Number of pages8
JournalJournal of Cleaner Production
Volume192
Early online date8 May 2018
DOIs
Publication statusPublished - 10 Aug 2018

Fingerprint

combined heat and power
Heat generation
Straw
crop residue
power generation
straw
Crops
Power generation
Economics
economics
Ashes
Environmental impact
mitigation
Bioelectric phenomena
Crop residues
China
Economic and social effects
Cost benefit analysis
cost-benefit analysis
environmental economics

Keywords

  • Straw utilization
  • Life cycle assessment
  • Cost benefit assessment
  • Biochar
  • Combined heat and power generation
  • Briquette fuel

Cite this

Environmental and economic assessment of crop residue competitive utilization for biochar, briquette fuel and combined heat and power generation. / Ji, Chunying ; Cheng, Kun; Nayak, Dali; Pan, Genxing (Corresponding Author).

In: Journal of Cleaner Production, Vol. 192, 10.08.2018, p. 916-923.

Research output: Contribution to journalArticle

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abstract = "Competitive utilization of straw is a challenge faced by developing countries such as China with the increase of crop production. Biochar, briquette fuel and combined heat and power generation are the three main new measures for straw utilization in recent years; however, there is still a knowledge gap for environmental and economic effects of these utilizations in China. To address this issue, combined lifecycle analysis and cost-benefit analysis was employed to assess the environmental impacts and economic benefits of biochar, briquette fuel and combined heat and power generation applications based on three cases in China. The results suggested that biochar was the most promising technology for straw utilization in China for its highest greenhouse gas mitigation potential i.e. -0.94 t CO2 equivalent (CO2e) per ton straw utilized and high profit with a net present value per ton straw of 20.98 U.S. dollars with the baseline of crop straw return including carbon revenue. Briquette fuel also deserves to achieve a best net present value ratio of 5.06 and GHG abatement potential being -0.9 t CO2e t-1 straw. However, the waste of straw ash could bring some pollution risk without suitable treatment. The economic potential of the combined heat and power generation project that produces bioelectricity, is not considerable with a very low net present value ratio of 0.007 and a mitigation potential of -0.03 tCO2e t-1 straw due to low energy utilization efficiency of direct combustion. Biochar could be one of the most potential economic and environmental sustainable straw utilization technologies in China though the wide production and application is still a big challenge in future.",
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author = "Chunying Ji and Kun Cheng and Dali Nayak and Genxing Pan",
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N1 - This work was financially supported by China Natural Science Foundation under a grant number 41501569 and “the Fundamental Research Funds for the Central Universities” under a grant number KYZ201523 and KJQN201673. This work was also supported by Department of Science and Technology of Jiangsu province under a grant number BK20150684, National Key Research and Development Plan (2017YFD0200802) and Ministry of Education under grant number 20120097130003.

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