Optimizing Microalgae Growth in Aquaculture Effluent: Harnessing Innovative Light Sources for Sustainable Solutions

Scientists from the Institute of Hydrobiology, Chinese Academy of Sciences, have recently utilized an innovative surround-type light source in a fermenter-style photobioreactor to explore the potential of microalgae in utilizing aquaculture effluent waste as nutrients for sustainable growth. While traditional glass container fermenters and photobioreactors are known for their high quality, conventional light sources often face challenges such as low light intensity, non-adjustable light intensity, and difficulties in obtaining specific spectra. The use of surround-type LED light sources provides a flexible selection and seamless switching of desired light sources, offering a convenient solution for upgrading existing equipment with compatible light sources.

In their experiments, researchers used monochromatic red light, monochromatic blue light, mixed red and blue light, etc., and compared the results with those obtained using white light. Simultaneously, they investigated the impact of light source switching during the microalgal growth cycle on their growth and waste removal processes. These findings are expected to contribute significantly to achieving the recycling and utilization of waste in aquaculture effluents. This not only reduces the cost of microalgal biomass production but also streamlines the aquaculture waste treatment process, promoting sustainable and secure aquaculture food production.

Master student Kairui Zhang investigating the microalgae cultured in aquaculture wastewater under different light sources.

Fermenter photobioreactor with surrounding light source