| Title: | The role of rhizofiltration and allelopathy on the removal of cyanobacteria in a continuous flow system |
| Author(s): | Castro-Castellon AT; Hughes JMR; Read DS; Azimi Y; Chipps MJ; Hankins NP; |
| Address: | "Department of Engineering Science, University of Oxford, Parks Road, Oxford, OX1 3PJ, UK. a.castro-castellon@bathspa.ac.uk. School of Science, Bath Spa University, Newton Park, Newton St Loe, Bath, BA2 9BN, UK. a.castro-castellon@bathspa.ac.uk. School of Geography and the Environment, University of Oxford, South Parks Road, Oxford, OX1 3QY, UK. Centre for Ecology & Hydrology, Wallingford, Oxford, OX10 8BB, UK. Department of Engineering Science, University of Oxford, Parks Road, Oxford, OX1 3PJ, UK. Thames Water Innovation, Thames Water Utilities Ltd., Reading, UK" |
| Journal Title: | Environ Sci Pollut Res Int |
| DOI: | 10.1007/s11356-021-12343-9 |
| ISSN/ISBN: | 1614-7499 (Electronic) 0944-1344 (Linking) |
| Abstract: | "A continuous flow filtration system was designed to identify and quantify the removal mechanisms of Cyanobacteria (Microcystis aeruginosa) by hydroponic biofilters of Phalaris arundinacea compared to synthetic filters. The filtration units were continuously fed under plug-flow conditions with Microcystis grown in photobioreactors. Microcystis cells decreased at the two flow rates studied (1.2 +/- 0.2 and 54 +/- 3 cm(3) min-(1)) and results suggested physical and chemical/biological removal mechanisms were involved. Physical interception and deposition was the main removal mechanism with packing density of the media driving the extent of cell removal at high flow, whilst physical and chemical/biological mechanisms were involved at low flow. At low flow, the biofilters decreased Microcystis cell numbers by 70% compared to the controls. The decrease in cell numbers in the biofilters was accompanied by a chlorotic process (loss of green colour), suggesting oxidative processes by the release of allelochemicals from the biofilters" |
| Keywords: | Allelopathy *Cyanobacteria Filtration *Microcystis Pheromones Biofilters Biofiltration Cyanobacteria removal Microcystis removal Phalaris arundinacea Responsible Editor: Vitor Manuel Oliveira Vasconcelos; |
| Notes: | "MedlineCastro-Castellon, Ana Teresa Hughes, Jocelyne Mary Rose Read, Daniel Steven Azimi, Yaldah Chipps, Michael James Hankins, Nicholas Peter eng N/A/Thames Water Utilities Ltd./ Germany 2021/01/31 Environ Sci Pollut Res Int. 2021 Jun; 28(22):27731-27741. doi: 10.1007/s11356-021-12343-9. Epub 2021 Jan 30" |
