Biochar industry to circular economy

Qiang Hu, Janelle Jung, Dexiang Chen, Ken Leong, Shuang Song, Fanghua Li, Babu Cadiam Mohan, Zhiyi Yao, Arun Kumar Prabhakar, Xuan Hao Lin, Ee Yang Lim, Le Zhang, Gupta Souradeep, Yong Sik Ok, Harn Wei Kua, Sam F.Y. Li, Hugh T.W. Tan, Yanjun Dai, Yen Wah Tong, Yinghong PengStephen Joseph, Chi Hwa Wang

Research output: Contribution to journalArticlepeer-review

118 Citations (Scopus)

Abstract

Biochar, produced as a by-product of pyrolysis/gasification of waste biomass, shows great potential to reduce the environment impact, address the climate change issue, and establish a circular economy model. Despite the promising outlook, the research on the benefits of biochar remains highly debated. This has been attributed to the heterogeneity of biochar itself, with its inherent physical, chemical and biological properties highly influenced by production variables such as feedstock types and treating conditions. Hence, to enable meaningful comparison of results, establishment of an agreed international standard to govern the production of biochar for specific uses is necessary. In this study, we analyzed four key uses of biochar: 1) in agriculture and horticulture, 2) as construction material, 3) as activated carbon, and 4) in anaerobic digestion. Then the guidelines for the properties of biochar, especially for the concentrations of toxic heavy metals, for its environmental friendly application were proposed in the context of Singapore. The international status of the biochar industry code of practice, feedback from Singapore local industry and government agencies, as well as future perspectives for the biochar industry were explained.

Original languageEnglish
Article number143820
JournalScience of the Total Environment
Volume757
DOIs
Publication statusPublished - 2021 Feb 25

Bibliographical note

Funding Information:
This research program is funded by the National Research Foundation (NRF), Prime Minister's Office, Singapore, under its Campus for Research Excellence and Technological Enterprise (CREATE) program, grant Number R-706-001-102-281. The authors acknowledge the technical input by Dr. Xin He on Fig. 2c. Any opinions, findings and conclusions or recommendations expressed in this material are those of the author(s) and do not reflect the views of the National Environment Agency Singapore, Public Utilities Board, Singapore, National Park Board, Singapore, Singapore Food Agency, and Enterprise Singapore.

Funding Information:
This research program is funded by the National Research Foundation (NRF), Prime Minister's Office, Singapore, under its Campus for Research Excellence and Technological Enterprise (CREATE) program, grant Number R-706-001-102-281 . The authors acknowledge the technical input by Dr. Xin He on Fig. 2 c. Any opinions, findings and conclusions or recommendations expressed in this material are those of the author(s) and do not reflect the views of the National Environment Agency Singapore, Public Utilities Board, Singapore, National Park Board, Singapore, Singapore Food Agency, and Enterprise Singapore.

Publisher Copyright:
© 2020 Elsevier B.V.

Keywords

  • Activated carbon
  • Agriculture and horticulture
  • Anaerobic digestion
  • Biochar
  • Construction material

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution

Fingerprint

Dive into the research topics of 'Biochar industry to circular economy'. Together they form a unique fingerprint.

Cite this