Towards Sustainable Macroalgae Biorefineries
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Towards Sustainable Macroalgae Biorefineries
Marine biorefineries of macroalgal (seaweed) feedstock are sustainable sources of food, materials, and energy, and can alleviate the growing pressure on land and freshwater resources. Development of an environmentally friendly seaweed biorefinery at an industrial scale requires a better understanding of the seaweeds’ life cycle and improving the inefficiency of on- and offshore cultivation technologies and downstream processing. This study addresses the challenges of developing a reliable, efficient, and continuous macroalgae feedstock supply through an enhanced understanding of the cultivation dynamics of the green macroalgae Ulva. We identified and focused on six knowledge gaps in the macroalgae cultivation process: (i) insufficient knowledge regarding the combined effect of nutrient concentrations and relative water-thallus velocity on growth rates of Ulva sp.; (ii) lack of exergy analysis of macroalgae cultivation systems; (iii) poor information regarding the potential growth rates of macroalgae in the Eastern Mediterranean Sea (EMS) deep seawater (DSW) nutrient concentrations; (iv) a lack of high-resolution (time scale of hours-to-days) macroalgae growth and nutrient models describing the dynamics of ambient N concentrations, internal N content, and growth rate; (v) poor knowledge about nutrient and growth dynamics of Ulva sp. when cultivated in naturally varying environmental conditions offshore the EMS; and (vi) a lack of multi-scale nutrient removal and macroalgae growth dynamics model relating to temporal and spatial variations. We attempt to fill these gaps by measuring growth rates and chemical compositions of Ulva sp. macroalgae in cultivation experiments in different systems and under different conditions and by developing models that progress from an energy balance model, through a basic growth model, to a more advanced physiological model, all based on experimental results. Altogether, we create a methodology and a framework for future precision seaweed farming.
Macroalgal Biorefineries For The Blue Economy
Author: Alexander Golberg
language: en
Publisher: World Scientific
Release Date: 2020-11-04
This unique compendium provides an insight into the role of emerging marine biorefineries based on macroalgae (seaweeds) in the development of a sustainable use of ocean resources for economic growth-blue economy.The useful reference text shows a complete picture on the motivation to develop seaweed technologies, and how the combination of biology, cultivation technologies and downstream processing with economics can address the social challenges through the blue growth.
Algal Biorefineries and the Circular Bioeconomy
"Algae are mysterious and fascinating organisms that hold great potential for discovery and biotechnology." —Dr. Thierry Tonon, Department of Biology, University of York "Science is a beautiful gift to humanity; we should not distort it." —A.P.J. Abdul Kalam In this book, we emphasize the importance of algal biotechnology as a sustainable platform to replace the conventional fossil-based economy. With this focus, Volume 2 summarizes the up-to-date literature and knowledge and discusses the advances in algal cultivation, genetic improvement, wastewater treatment, resource recovery, commercial operation, and technoeconomic analysis of algal biotechnology. FEATURES Discusses in detail recent developments in algae cultivation and biomass harvesting Provides an overview of genetic engineering and algal-bacteria consortia to improve productivity Presents applications of algae in the area of wastewater treatment and resource recovery Provides case studies and technoeconomic analysis to understand the algal biorefinery Shashi Kant Bhatia, PhD, is an Associate Professor in the Department of Biological Engineering, Konkuk University, Seoul, South Korea. Sanjeet Mehariya, PhD, is a Postdoctoral Researcher at the Department of Chemistry, Umeå University, Umeå, Sweden. Obulisamy Parthiba Karthikeyan, PhD, is a Research Scientist and Lecturer (Adjunct) in the Department of Civil and Environmental Engineering, South Dakota School of Mines and Technology, Rapid City, South Dakota, USA.