Heterotrophic microalgae cultivation to synergize biodiesel production with waste remediation: Progress and perspectives

Published Date
Bioresource Technology
May 2015, Vol.184:169–178, doi:10.1016/j.biortech.2014.10.056
Advances in biofuels and chemicals from algae

• Author 

• S. Venkata Mohan ^a,b,,
• M.V. Rohit ^a,b
• P. Chiranjeevi ^a,b
• Rashmi Chandra ^a,b
• B. Navaneeth ^a

• aBioengineering and Environmental Sciences (BEES), CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad 500 007, India
• bAcademy of Scientific and Innovative Research (AcSIR), India

Received 31 August 2014. Revised 10 October 2014. Accepted 12 October 2014. Available online 1 November 2014. 

Highlights

• •
  Synergising heterotrophic cultivation of microalgae with wastewater treatment.
• •
  Integrated biorefinery in a closed loop approach.
• •
  Heterotrophic cultivation is amenable for higher biomass and lipid productivity.
• •
  Multidisciplinary approach enables value addition to co-products.

Abstract

Microalgae are inexhaustible feedstock for synthesis of biodiesel rich in polyunsaturated fatty acids (PUFA) and valuable bioactive compounds. Their cultivation is critical in sustaining the global economy in terms of human consumption of food and fuel. When compared to autotrophic cultivation, heterotrophic systems are more suitable for producing high cell densities of microalgae for accumulation of large quantities of lipids (triacylglycerols) which can be converted into biodiesel. Consorted efforts are made in this communication to converge recent literature on heterotrophic cultivation systems with simultaneous wastewater treatment and algal oil production. Challenges faced during large scale production and limiting factors which hinder the microalgae growth are enumerated. A strategic deployment of integrated closed loop biorefinery concept with multi-product recovery is proposed to exploit the full potential of algal systems. Sustainable algae cultivation is essential to produce biofuels leading to green future.

Keywords

Wastewater treatment

Mixotrophic

Biorefinery

Biodiesel

Heterotrophic

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• ⁎ 
  Corresponding author at: Academy of Scientific and Innovative Research (AcSIR), India. Tel./fax: +91 40 27191664.

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