Integration of anaerobic digestion and microalgal cultivation for digestate bioremediation and biogas upgrading

Dillirani Nagarajan, Duu Jong Lee, Jo Shu Chang

研究成果: Review article同行評審

22 引文 斯高帕斯(Scopus)

摘要

Biogas is the gaseous byproduct obtained during anaerobic digestion which is rich in methane, along with a significant amount of other gases like CO2. The removal of CO2 is essential to upgrade the biogas to biomethane (>95% methane content). High CO2 tolerant microalgae can be employed as a biological CO2 scrubbing agent for biogas upgrading. Many microalgal strains tolerant to the levels of CO2 and CH4 seen in biogas have been reported. A CO2 removal efficiency of 50–99% can be attained based on the microalgae used and the cultivation conditions applied. Nutrient-rich liquid digestate obtained from anaerobic digestion can also be used as the cultivation medium for microalgae, performing biogas upgrading and digestate bioremediation simultaneously. Mixotrophic cultivation enables microalgae to utilize the organic carbon present in the liquid digestate along with nitrogen and phosphorus. Microalgae appears to be a potential biological CO2 scrubbing agent for efficient biogas upgrading.

原文English
文章編號121804
期刊Bioresource technology
290
DOIs
出版狀態Published - 2019 十月

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Environmental Engineering
  • Renewable Energy, Sustainability and the Environment
  • Waste Management and Disposal

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