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Related Concept Videos

Green Algae01:21

Green Algae

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Green algae, also referred to as chlorophytes, are different from red algae in having the chloroplasts containing chlorophylls a and b, which give them their distinct green hue. However, they lack phycobiliproteins, preventing them from developing the red or blue-green pigmentation seen in red algae. In terms of photosynthetic pigment composition, green algae closely resemble plants and share a close evolutionary relationship with them. Taxonomically Green algae belong to Phylum Chlorophyta in...
943

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Related Experiment Video

Updated: Feb 21, 2026

Microalgae Cultivation and Biomass Quantification in a Bench-Scale Photobioreactor with Corrosive Flue Gases
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Microalgae Cultivation and Biomass Quantification in a Bench-Scale Photobioreactor with Corrosive Flue Gases

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Modified conventional bioreactor for microalgae cultivation.

Ritu Verma1, Rahul Kumar1, Luv Mehan1

  • 1University School of Chemical Technology, Guru Gobind Singh Indraprastha University, Sec-16C, Dwarka, New Delhi 110078, India.

Journal of Bioscience and Bioengineering
|October 10, 2017
PubMed
Summary
This summary is machine-generated.

This study optimized photobioreactor design for cost-effective microalgae cultivation, enhancing biofuel production. Modified media and airflow increased cell productivity and carbon dioxide sequestration for Nannochloropsis sp. and Arthrospira platensis.

Keywords:
CO(2) sequestrationFour way flow regimeImpeller typePhotobioreactorSparger

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Area of Science:

  • Biotechnology
  • Renewable Energy
  • Environmental Science

Background:

  • Microalgae are a promising source for third-generation biofuels, but economical high-concentration cultivation remains a challenge.
  • Current photobioreactor designs and nutrient media formulations limit specific growth rates and biomass accumulation.
  • Efficient photobioreactor design is crucial for unlocking the economic potential of microalgae.

Purpose of the Study:

  • To develop an economical and efficient photobioreactor for high-concentration microalgae cultivation.
  • To optimize nutrient media and operational parameters for enhanced microalgae growth and productivity.
  • To improve carbon dioxide sequestration efficiency in microalgae cultivation.

Main Methods:

  • Modified standard nitrate-based media (f/2 and Zarrouk's) for Nannochloropsis sp. and Arthrospira platensis.
  • Altered aeration and agitation in a conventional bioreactor (BIOFLO 110) to reduce energy use and improve mixing.
  • Implemented a four-way flow regime to ensure uniform nutrient and cell distribution.

Main Results:

  • Achieved volumetric cell productivities of 0.618 g/l/d for Nannochloropsis sp. and 0.774 g/l/d for A. platensis.
  • Attained maximum specific CO2 sequestration rates of 0.42 g/g/h for Nannochloropsis sp. and 0.39 g/g/h for A. platensis.
  • Demonstrated efficient and effective photobioreactor operation through enhanced nutrient and cell distribution.

Conclusions:

  • The modified photobioreactor design and media formulations significantly enhance microalgae cultivation efficiency.
  • This approach supports high cell productivity and effective carbon dioxide sequestration, crucial for biofuel production.
  • The optimized system presents a viable solution for economical, large-scale microalgae cultivation.