An effective, cost-efficient extraction method of biomass from wet microalgae with a functional polymeric membrane
Literature Information
Gursong Yoo, Youngmin Yoo, Jong-Hee Kwon, Cornelius Darpito, Sanjiv K. Mishra, Kwanyong Pak
For energy-efficient extraction of biomass from microalgae, it is essential to extract the intracellular lipid directly from wet microalgae without drying the microalgal biomass. In this work, a novel, highly efficient cell disruption process was devised using a functional membrane coated with a cationic polymer. The proposed mechanism of cell disruption involves the perturbation of the local electrostatic equilibrium of the amphiphilic microalgal cell membrane caused by the direct contact with the tertiary-amine cations on the surface of the membrane. A tert-amine-containing polymer, poly-dimethylaminomethylstyrene (pDMAMS) film was conformally deposited on a nylon membrane by a vapor-phase polymerization process, termed as initiated chemical vapor deposition (iCVD). For the wet extraction with this membrane, the pDMAMS-coated membrane was immersed in a microalgal culture of Aurantiochytrium sp. KRS101. The microalgal culture was simply shaken together with the membrane to prompt the contact with the pDMAMS-coated membrane. With this ultimately simple procedure, the bursting of cells was clearly observed. Surprisingly, by this simple, energy-efficient process, a significantly high disruption yield of 25.6 ± 2.18% was achieved. The membrane-based extraction process is highly desirable in that (1) the process does not require an energy-consuming drying procedure, and (2) the proposed cell disruption method with a functional membrane is extremely simple and highly efficient.
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Green Chemistry provides a unique forum for the publication of innovative research on the development of alternative green and sustainable technologies. The scope of Green Chemistry is based on, but not limited to, the definition proposed by Anastas and Warner (Green Chemistry: Theory and Practice, P T Anastas and J C Warner, Oxford University Press, Oxford, 1998). Green chemistry is the utilisation of a set of principles that reduces or eliminates the use or generation of hazardous substances in the design, manufacture and application of chemical products. Green Chemistry is at the frontiers of this continuously-evolving interdisciplinary science and publishes research that attempts to reduce the environmental impact of the chemical enterprise by developing a technology base that is inherently non-toxic to living things and the environment. Submissions on all aspects of research relating to the endeavour are welcome. The journal publishes original and significant cutting-edge research that is likely to be of wide general appeal. To be published, work must present a significant advance in green chemistry. Papers must contain a comparison with existing methods and demonstrate advantages over those methods before publication can be considered. For more information please see this Editorial. Coverage includes the following, but is not limited to: Design (e.g. biomimicry, design for degradation/recycling/reduced toxicity…) Reagents & Feedstocks (e.g. renewables, CO2, solvents, auxiliary agents, waste utilization…) Synthesis (e.g. organic, inorganic, synthetic biology…) Catalysis (e.g. homogeneous, heterogeneous, enzyme, whole cell…) Process (e.g. process design, intensification, separations, recycling, efficiency…) Energy (e.g. renewable energy, fuels, photovoltaics, fuel cells, energy storage, energy carriers…) Applications (e.g. electronics, dyes, consumer products, coatings, pharmaceuticals, preservatives, building materials, chemicals for industry/agriculture/mining…) Impact (e.g. safety, metrics, LCA, sustainability, (eco)toxicology…) Green chemistry is, by definition, a continuously-evolving frontier. Therefore, the inclusion of a particular material or technology does not, of itself, guarantee that a paper is suitable for the journal. To be suitable, the novel advance should have the potential for reduced environmental impact relative to the state of the art. Green Chemistry does not normally deal with research associated with 'end-of-pipe' or remediation issues.










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