Sustainable microalgal biomass valorization to bioenergy: Key challenges and future perspectives.

The global trend is shifting toward circular economy systems. It is a sustainable environmental approach that sustains economic growth from the use of resources while minimizing environmental impacts. The multiple industrial use of microalgal biomass has received great attention due to its high content of essential nutrients and elements. Nevertheless, low biomass productivity, unbalanced carbon to nitrogen (C/N) ratio, resistant cellular constituents, and the high cost of microalgal harvesting represent the major obstacles for valorization algal biomass. In recent years, microalgae biomass has been candidate as a potential feedstock for different bioenergy generation with simultaneous treating wastewater and CO2 capture. An overview of the appealing features and needed advancements are urgently essential for microalgae-derived bioenergy generation. The present review provides a timely outlook and evaluation of biomethane production from microalgal biomass and related challenges. Moreover, the biogas recovery potential from microalgal biomass through different pretreatment and synergism anaerobic co-digestion (AcoD) with another biowastes are evaluated. In addition, the removal of micropollutants and heavy metals by microalgal cells via adsorption and bioaccumulation in their biomass are discussed. Herein, a comprehensive review is presented about a successive high-throughput for anaerobic digestion (AD) of the microalgal biomass in order to achieve for sustainable energy source. Lastly, the valorization of the digestate from AD of microalgae for agricultural reuse is highlighted.

• Publication year

  2022

• Venue

  Chemosphere

• Publication date

  2022-02-01

• Fields of study

  Medicine, Environmental Science

• Identifiers
  DOI 10.1016/j.chemosphere.2022.133812PMID 35149012
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar, PubMed

• No claims are published for this paper.

• No concepts are published for this paper.

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