9 research outputs found
Valorisation to biogas of macroalgal waste streams: a circular approach to bioproducts and bioenergy in Ireland
© 2016 The Author(s) Seaweeds (macroalgae) have been recently attracting more and more interest as a third generation feedstock for bioenergy and biofuels. However, several barriers impede the deployment of competitive seaweed-based energy. The high cost associated to seaweed farming and harvesting, as well as their seasonal availability and biochemical composition currently make macroalgae exploitation too expensive for energy production only. Recent studies have indicated a possible solution to aforementioned challenges may lay in seaweed integrated biorefinery, in which a bioenergy and/or biofuel production step ends an extractions cascade of high-value bioproducts. This results in the double benefit of producing renewable energy while adopting a zero waste approach, as fostered by recent EU societal challenges within the context of the Circular Economy development. This study investigates the biogas potential of residues from six indigenous Irish seaweed species while discussing related issues experienced during fermentation. It was found that Laminaria and Fucus spp. are the most promising seaweed species for biogas production following biorefinery extractions producing 187–195 mL CH4 gVS−1 and about 100 mL CH4 gVS−1 , respectively, exhibiting overall actual yields close to raw un-extracted seaweed
Biocorrosion on Surface of ASTM A283 Carbon Steel, Exposed in Diesel S10 and Tap Water
Assessments of quaternary ammonium compounds (QAC) for in-water treatment of mussel fouling in vessel internals and sea chests using an experimental seawater pipework system
Presence of skeletal banding in a reef-building tropical crustose coralline alga - Fig 6
<p><b>a</b>. <b>SEM of <i>Porolithon onkodes</i></b> cross-section showing no regular banding patterns (from changes in cell size) as seen in other coralline algae samples (e.g., as shown in [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0185124#pone.0185124.ref017" target="_blank">17</a>]). Vertical arrows indicate areas of higher density within the conceptacle band, horizontal arrow indicates conceptacle, <b>b</b>. <b>Rapid growth cells in <i>Porolithon onkodes</i></b>. Long, less calcified cells in <i>P</i>. <i>onkodes</i> skeleton on the top right hand corner of image (upper arrow) indicate an area of rapid growth compared to cells beneath this (lower arrow); in this sample the rapid growth overgrew the epoxy that had covered that part of the epithallus.</p