10
views
0
recommends
+1 Recommend
0 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: found
      Is Open Access

      Overcoming Microalgae Harvesting Barrier by Activated Algae Granules

      research-article

      Read this article at

      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          The economic factor of the microalgae harvesting step acts as a barrier to scaling up microalgae-based technology designed for wastewater treatment. In view of that, this study presents an alternative microalgae-bacteria system, which is proposed for eliminating the economic obstacle. Instead of the microalgae-bacteria (activated algae) flocs, the study aimed to develop activated algae granules comprising the microalgae Chlorella sp. as a target species. The presence of the filamentous microalgae ( Phormidium sp.) was necessary for the occurrence of the granulation processes. A progressive decrease in frequency of the free Chlorella sp. cells was achieved once with the development of the activated algae granules as a result of the target microalgae being captured in the dense and tangled network of filaments. The mature activated algae granules ranged between 600 and 2,000 µm, and were characterized by a compact structure and significant settling ability (21.6 ± 0.9 m/h). In relation to the main aim of this study, a microalgae recovery efficiency of higher than 99% was achieved only by fast sedimentation of the granules; this performance highlighted the viability of the granular activated algae system for sustaining a microalgae harvesting procedure with neither cost nor energy inputs.

          Related collections

          Most cited references32

          • Record: found
          • Abstract: not found
          • Article: not found

          Biofuels from microalgae—A review of technologies for production, processing, and extractions of biofuels and co-products

            Bookmark
            • Record: found
            • Abstract: not found
            • Article: not found

            Second Generation Biofuels: High-Efficiency Microalgae for Biodiesel Production

              Bookmark
              • Record: found
              • Abstract: found
              • Article: not found

              Cultivation, photobioreactor design and harvesting of microalgae for biodiesel production: a critical review.

              Microalgae have the ability to mitigate CO(2) emission and produce oil with a high productivity, thereby having the potential for applications in producing the third-generation of biofuels. The key technologies for producing microalgal biofuels include identification of preferable culture conditions for high oil productivity, development of effective and economical microalgae cultivation systems, as well as separation and harvesting of microalgal biomass and oil. This review presents recent advances in microalgal cultivation, photobioreactor design, and harvesting technologies with a focus on microalgal oil (mainly triglycerides) production. The effects of different microalgal metabolisms (i.e., phototrophic, heterotrophic, mixotrophic, and photoheterotrophic growth), cultivation systems (emphasizing the effect of light sources), and biomass harvesting methods (chemical/physical methods) on microalgal biomass and oil production are compared and critically discussed. This review aims to provide useful information to help future development of efficient and commercially viable technology for microalgae-based biodiesel production. Copyright © 2010 Elsevier Ltd. All rights reserved.
                Bookmark

                Author and article information

                Contributors
                olga.tiron@incdecoind.ro
                Journal
                Sci Rep
                Sci Rep
                Scientific Reports
                Nature Publishing Group UK (London )
                2045-2322
                5 July 2017
                5 July 2017
                2017
                : 7
                : 4646
                Affiliations
                [1 ]Department of Environmental Technologies and Technological Transfer, National Research and Development Institute for Industrial Ecology - ECOIND, 71–73 Drumul Podu Dambovitei, 060652 Bucharest, Romania
                [2 ]Department of Pollution Control, National Research and Development Institute for Industrial Ecology - ECOIND, 71–73 Drumul Podu Dambovitei, 060652 Bucharest, Romania
                Author information
                http://orcid.org/0000-0001-9810-4999
                Article
                5027
                10.1038/s41598-017-05027-3
                5498540
                28680112
                bf93a898-9a83-4769-acb3-1cfb97095868
                © The Author(s) 2017

                Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

                History
                : 27 January 2017
                : 23 May 2017
                Categories
                Article
                Custom metadata
                © The Author(s) 2017

                Uncategorized
                Uncategorized

                Comments

                Comment on this article