Construction of biotreatment platforms for aromatic hydrocarbons and their future perspectives

Ravi Kumar Sonwani, Ki Hyun Kim, Ming Zhang, Yiu Fai Tsang, Sang Soo Lee, Balendu Shekher Giri, Ram Sharan Singh, Birendra Nath Rai

Research output: Contribution to journalArticlepeer-review

Abstract

Aromatic hydrocarbons (AHCs) are one of the major environmental pollutants introduced from both natural and anthropogenic sources. Many AHCs are well known for their toxic, carcinogenic, and mutagenic impact on human health and ecological systems. Biodegradation is an eco-friendly and cost-effective option as microorganisms (e.g., bacteria, fungi, and algae) can efficiently breakdown or transform such pollutants into less harmful and simple metabolites (e.g., carbon dioxide (aerobic), methane (anaerobic), water, and inorganic salts). This paper is organized to offer a state-of-the-art review on the biodegradation of AHCs (monocyclic aromatic hydrocarbons (MAHs) and polycyclic aromatic hydrocarbons (PAHs)) and associated mechanisms. The recent progress in biological treatment using suspended and attached growth bioreactors for the biodegradation of AHCs is also discussed. In addition, various substrate growth and inhibition models are introduced along with the key factors governing their biodegradation kinetics. The growth and inhibition models have helped gain a better understanding of substrate inhibition in biodegradation. Techno-economic analysis (TEA) and life cycle assessment (LCA) aspects are also described to assess the technical, economical, and environmental impacts of the biological treatment system.

Original languageEnglish
Article number125968
JournalJournal of Hazardous Materials
Volume416
DOIs
StatePublished - 2021 Aug 15
Externally publishedYes

Keywords

  • Aromatic hydrocarbons
  • Attached growth bioreactor
  • Biodegradation
  • Suspended growth bioreactor

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