Quantifying Microalgae Growth by the Optical Detection of Glucose in the NIR Waveband

Area of Science:

• Biotechnology
• Optical Physics
• Environmental Science

Background:

• Microalgae research is expanding due to applications in pharmaceuticals, biofuels, and food.
• Optimizing microalgae upstream production is crucial for fully realizing their benefits.
• Current growth measurement using optical density is hindered by debris and intercellular absorption.

Purpose of the Study:

• To introduce direct optical detection of glucose molecules for accurate microalgae growth measurement.
• To investigate glucose's effect on water molecule absorption.
• To evaluate optical glucose detection as a complementary method to optical density.

Main Methods:

• Direct optical detection of glucose molecules within the 940-960 nm range.
• Analysis of glucose's impact on free water molecule absorption spectra.
• Comparison of glucose detection with traditional optical density measurements at 680 nm.

Main Results:

• Optical detection of glucose provides a more accurate measure of microalgae biomass.
• Glucose presence influences water absorption, a factor to consider in optical measurements.
• The proposed method shows potential for improving microalgae cultivation monitoring.

Conclusions:

• Direct optical glucose detection is a promising technique for accurate microalgae growth assessment.
• This method can enhance the reliability of microalgae cultivation for industrial applications.
• Further research is recommended to validate glucose detection for growth determination.