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<p>Microalgal biomass is an alternative for energy production due to its carbohydrates and fatty acids. <i>Nannochloropsis oculata</i> is a lipid-rich specie with the potential for biofuels. Photobioreactors are devices that promote the production of microalgal biomass in a determined and controlled environment through the regulation of the essential variables of microalgae growth. Tubular photobioreactors are the most known and common designs due to their high productivity in microalgae cultivation. However, the cultivation of microalgae in closed-system photobioreactors for energy applications faces significant challenges that impede industrial-scale implementation due to low energy efficiency, consuming more energy than they produce and representing a negative energy balance. The present work focuses on the study of the energy consumption and the production of microalgal biomass of a photobioreactor in Mazatlán, Sinaloa, México, finding that the thermal system, in addition to being indispensable for microalgal growth, is also the one with the highest energy consumption. Through a control strategy based on a mathematical model that relates the mass flow of a heat exchanger to the energy flow in the microalgal culture, better energy utilization is achieved and a reduction in the electrical consumption of the thermal system, increasing the efficiency of the photobioreactor by 9.89%. Contributing to the future where bioenergy from microalgal biomass helps to satisfy the global energy demand.</p>

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Energy consumption of the thermal system in a pilot-scale photobioreactor growing Nannochloropsis oculata

  • 期刊论文

  • 发表日期：

    2026年7月2日

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  • Jesús Gonzalo Valenzuela Páez,
  • Manuel Adam Medina,
  • Miguel Ángel Franco Nava,
  • Gerardo Vicente Guerrero Ramírez,
  • Carlos Daniel García Beltrán,
  • Carlos Manuel Astorga Zaragoza

摘要

Microalgal biomass is an alternative for energy production due to its carbohydrates and fatty acids. Nannochloropsis oculata is a lipid-rich specie with the potential for biofuels. Photobioreactors are devices that promote the production of microalgal biomass in a determined and controlled environment through the regulation of the essential variables of microalgae growth. Tubular photobioreactors are the most known and common designs due to their high productivity in microalgae cultivation. However, the cultivation of microalgae in closed-system photobioreactors for energy applications faces significant challenges that impede industrial-scale implementation due to low energy efficiency, consuming more energy than they produce and representing a negative energy balance. The present work focuses on the study of the energy consumption and the production of microalgal biomass of a photobioreactor in Mazatlán, Sinaloa, México, finding that the thermal system, in addition to being indispensable for microalgal growth, is also the one with the highest energy consumption. Through a control strategy based on a mathematical model that relates the mass flow of a heat exchanger to the energy flow in the microalgal culture, better energy utilization is achieved and a reduction in the electrical consumption of the thermal system, increasing the efficiency of the photobioreactor by 9.89%. Contributing to the future where bioenergy from microalgal biomass helps to satisfy the global energy demand.