Mineral CO2 sequestration by environmental biotechnological processes

Shiva S. Salek*, Robbert Kleerebezem, Henk M. Jonkers, Geert jan Witkamp, Mark C.M. Van Loosdrecht

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review

32 Scopus citations

Abstract

CO2 sequestration may be an avenue to mitigate climate change. CO2 sequestration by mineral carbonation can be achieved by the reaction of CO2 with alkaline silicates. Here, we evaluate how alkaline silicate mineral-based CO2 sequestration can be achieved using environmental biotechnological processes. Several biotechnological processes rely on the sequence of (i) an acid-producing reaction such as nitrification and anaerobic fermentation and (ii) an alkalinity-producing reaction such as denitrification and methanogenesis. Whereas the acid-producing reaction can be used to enhance the dissolution of, for example, alkaline calcium silicates, the subsequent alkalinity-producing step can precipitate CaCO3. We quantitatively evaluate the potential of these processes for CO2 sequestration and propose that optimization of these processes could contribute to climate change mitigation strategies.

Original languageEnglish (US)
Pages (from-to)139-146
Number of pages8
JournalTrends in Biotechnology
Volume31
Issue number3
DOIs
StatePublished - Mar 1 2013

Keywords

  • Anaerobic digestion
  • Biogas improvement
  • Biological wastewater treatment
  • Biotechnological processes
  • Mineral CO sequestration
  • Silicate minerals

ASJC Scopus subject areas

  • Biotechnology
  • Bioengineering

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