**About the Editors**

**Carole A. Llewellyn**'s interests are in microalgae and cyanobacteria, and how they function in their natural environment, especially in relation to photophysiology. She is also interested in how algae can be used to help tackle society's big challenges. These big challenges relate to climate change, human health, bioenergy, food-security, aquaculture, waste-water and pollution bioremediation, industrial biotechnology and the circular economy. Her early research focused on the study of chlorophyll and carotenoid pigments to understand phytoplankton community composition and function, in relation to the carbon cycle and climate change. From this, she developed an interest in algal biotechnology using her knowledge on microalgal carotenoids and UV sunscreen compounds, working with industry to develop personal care products for anti-aging and cosmetics. This has led to her wider interest in understanding metabolism in microalgae and the large scale cultivation of microalgae for industrially useful products, including for food and for sustainable chemicals, to replace existing petroleum-based chemicals. She has led a number of projects funded by the Research Councils, Innovate-UK and Europe, often working with industry to develop sustainable solutions using microalgae. She currently leads the EU Interreg North West Europe ALG-AD project (ALG-AD), developing the circular economy by linking using waste from the anaerobic digestion of food and farm waste to the cultivation of algae for animal feed and high value products.

**Rahul Vijay Kapoore**'s main interests are in microalgal biotechnology, -omics sciences (metabolomics), bioanalytical techniques, microbial consortia, circular economy, biorefineries, bioremediation and high value products from microalgae. Originally from Nashik (India), Rahul obtained a first class degree in Bachelor of Pharmacy in 2006 from M.G.V's College of Pharmacy, Nashik (Pune University). Subsequent to the completion of his degree, Rahul came to the UK in 2006 to pursue his MSc in Pharmacology and Biotechnology at Sheffield Hallam University, where he graduated in November 2007. Rahul holds a PhD in Metabolomics (2010–2014) from The University of Sheffield (TUOS), and his doctoral research was based on the development and optimisation of mass spectrometry based hyphenated techniques for microalgal and mammalian metabolomics. Rahul joined the Department of Chemical and Biological Engineering (CBE) at TUOS (2014–2017) as a Postdoctoral Research Associate (PDRA) on a BBSRC-DBT funded (1.22 million GBP) project (BB/K020633/1): "Sustainable Bioenergy and Biofuels from Microalgae: A Systems Perspective". The research involved GC-MS and LC-MS based metabolome level characterisations of microalgal strains, and thereby developing a systems level understanding in combination with other systems biology approaches (proteomics and transcriptomics), that will lead to sustainable processes for bio-energy generation from microalgae. Later, he joined Swansea University (2018–present) as a research officer involved in the ALG-AD project (circular economy): a strategic initiative of the INTERREG North West Europe Programme led by Swansea University. We propose to use unwanted nutrients from anaerobic digestion facilities to produce algal biomass for sustainable animal feeds and other high-value products.
