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Related Concept Videos

Other Algae01:19

Other Algae

248
The group Stramenopiles include some phototrophic microorganisms. Members of this group possess flagella covered in numerous short, hairlike extensions, a feature that inspired the group's name, derived from the Latin words for "straw" and "hair." Some of the main categories of Stramenopiles include diatoms, golden algae, and brown algae.Diatoms are unicellular, photosynthetic eukaryotes, with over 200 known genera. They play a key role in the planktonic communities of both marine and...
248
Green Algae01:21

Green Algae

497
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...
497

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Related Experiment Video

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Optimize Flue Gas Settings to Promote Microalgae Growth in Photobioreactors via Computer Simulations
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Using Simulated Flue Gas to Rapidly Grow Nutritious Microalgae with Enhanced Settleability.

Hannah R Molitor1, Jerald L Schnoor1

  • 1Department of Civil and Environmental Engineering, University of Iowa, 103 S. Capitol Street, Iowa City, Iowa 52240, United States.

ACS Omega
|November 2, 2020
PubMed
Summary

Microalgae cultivation using flue gas enhanced growth and settling rates, showing potential for pollution treatment and valuable animal feed production. This process offers a sustainable alternative to soy protein with added environmental benefits.

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Area of Science:

  • * Environmental biotechnology
  • * Algal biotechnology
  • * Bioremediation

Background:

  • * Microalgae offer a sustainable source for animal feed, potentially replacing soy protein.
  • * Challenges in microalgal production include tolerance to waste streams and efficient harvesting.
  • * Current assumptions suggest microalgae are inhibited by flue gases and settle poorly.

Purpose of the Study:

  • * To investigate the effects of simulated flue gas on microalgal growth and settling.
  • * To assess the potential of microalgae for pollution treatment and animal feed production.
  • * To evaluate the capture of sulfur dioxide (SO2) and changes in biomass composition.

Main Methods:

  • * Cultivation of *Scenedesmus obliquus* in a 2 L photobioreactor with simulated coal-fired power plant flue gas.
  • * Measurement of biomass productivity and settling rates.
  • * Analysis of SO2 capture and changes in protein and amino acid content.

Main Results:

  • * Simulated flue gas significantly increased biomass productivity (700 mg L⁻¹ d⁻¹) compared to control (510 mg L⁻¹ d⁻¹).
  • * Microalgal cultures exposed to flue gas exhibited rapid coagulation and settling, unlike control cultures.
  • * Over 100% of SO2 was captured, with some incorporated into biomass, and methionine content remained stable.

Conclusions:

  • * *Scenedesmus obliquus* demonstrates enhanced growth and settling when exposed to simulated flue gas, overcoming previous assumptions.
  • * Microalgae cultivation using waste flue gas is a viable strategy for pollution control and producing animal feed.
  • * This approach presents a cost-effective and sustainable method for resource recovery and CO2 emission mitigation.