Hydrothermal carbonization and pellet production from Egeria densa and Lemna minor
| Autor: | Ángeles Cancela, Ángel Sánchez, Enrique Valero, Vanesa Freitas, Carolina Acuña-Alonso, Xana Álvarez |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
0211 other engineering and technologies
02 engineering and technology Plant Science 010501 environmental sciences 01 natural sciences hydrothermal carbonization Hydrothermal carbonization Nutrient Aquatic plant Biochar Egeria densa 2207.09 Conversión de Energía 021108 energy Aquatic plants Ecology Evolution Behavior and Systematics 2417.07 Algología (Ficología) 0105 earth and related environmental sciences Lemna minor Ecology biology Botany pellets biology.organism_classification Pulp and paper industry Biofuel QK1-989 Nutrient pollution Environmental science 2508 Hidrología Eutrophication |
| Zdroj: | Investigo. Repositorio Institucional de la Universidade de Vigo Universidade de Vigo (UVigo) Plants Volume 9 Issue 4 Plants, Vol 9, Iss 425, p 425 (2020) |
| Popis: | Biofuels are seen as a potential option for mitigating the effects of fossil fuel use. On the other hand, nutrient pollution is accelerating eutrophication rates in rivers, lakes, and coastal waters. Harvesting aquatic plants to produce biofuels could mitigate this problem, though it is important to attack the problem at source, mainly as regards the contribution of nutrients. For the first time, solid biofuels were obtained in the forms of carbon and pellets from the aquatic plants Egeria densa, which is classed as an invasive plant under the Spanish Catalogue of Exotic Invasive Species, and Lemna minor, both of which can be found in the Umia River in north-west Spain. The essential oils and macro- and microelements present in both these plants were also extracted and analyzed. The higher heating values (HHVs) of the carbon products obtained ranged from 14.28 to 17.25 MJ/kg. The ash content ranged from 22.69% to 49.57%. The maximum yield obtained for biochar for Egeria densa at 200 ° C was 66.89%. Temperature significantly affects solid hydrochar yield. The HHVs of the pellets obtained ranged from 11.38 to 13.49 MJ/kg. The use of these species to obtain biofuels through hydrothermal carbonization (HTC) and pellets is a novel and effective approach that will facilitate the removal of nutrients that cause eutrophication in the Umia River. The elements extracted show that harvesting these plants will help to remove excessive nutrients from the ecosystem. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|