title: The use of natural infochemicals for sustainable and efficient harvesting of the microalgae Scenedesmus spp. for biotechnology: insights from a meta-analysis.
abstract: Open raceway ponds are regarded as the most economically viable option for large-scale cultivation of microalgae for low to mid-value bio-products, such as biodiesel. However, improvements are required including reducing the costs associated with harvesting biomass. There is now a growing interest in exploiting natural ecological processes within biotechnology. We review how chemical cues produced by algal grazers induce colony formation in algal cells, which subsequently leads to their sedimentation. A statistical meta-analysis of more than 80 studies reveals that Daphnia grazers can induce high levels of colony formation and sedimentation in Scenedesmus obliquus and that these natural, infochemical induced sedimentation rates are comparable to using commercial chemical equivalents. These data suggest that natural ecological interactions can be co-opted in biotechnology as part of a promising, low energy and clean harvesting method for use in large raceway systems.
authors: Department of Chemical and Biological Engineering, University of Sheffield, Mappin Street, Sheffield, S1 3JD, UK.
authors: Sebastiana
authors: S
authors: Roccuzzo
authors: Department of Animal and Plant Sciences, University of Sheffield, Alfred Denny Building, Western Bank, Sheffield, S10 2TN, UK.
authors: Andrew P
authors: AP
authors: Beckerman
authors: Department of Chemical and Biological Engineering, University of Sheffield, Mappin Street, Sheffield, S1 3JD, UK. j.pandhal@sheffield.ac.uk.
authors: Jagroop
authors: J
authors: Pandhal
mesh_terms: D018533:Biomass; D001709:Biotechnology; D058086:Microalgae / Q000378:metabolism*; D044444:Scenedesmus / Q000378:metabolism*
keywords: Colony formation; Daphnia infochemicals; Harvesting biomass; Microalgae; Open raceway ponds; Scenedesmus spp