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Purificação de Biogás através de cultivo de microalgas em resíduos agroindustriais
| Content Provider | Semantic Scholar |
|---|---|
| Author | Miyawaki, Bruno |
| Copyright Year | 2014 |
| Abstract | Reduce greenhouse gas emissions in the atmosphere and increase energy supply are the main challenges. Thus, the use of biogas as an energy source shows promising especially in agricultural regions where there is a large availability of waste that can be turned into energy, reducing production costs and environmental impacts. However, the presence of impurities in the biogas reduces its quality. One alternative to improve the utilization of biogas it ́s eliminate impurities of your composition, such as carbon dioxide (CO2). The CO2 can be biologically converted into organic matter by photosynthetic organisms such as microalgae. This study evaluated the process of purification of biogas derived from the digestion of wastewater through the autotrophic cultivation of microalgae Scenedesmus disciformis. The experiments were performed in airlifts photobioreactors (12 L) at ambient conditions. Three diluted biodigester effluents as alternative culture were used (pig manure 5%, domestic sewage 25% and cattle manure 30%). In these experiments, the capacity to growth of microalgae with injection of biogas into the culture was verified, as well the biogas purification by the system. The maximum biomass productivity obtained in the cultures was 2.0 ± 0.16 g.L yielding a level of 26% lipids for the pig manure with injection of biogas. The maximum cell concentration obtained was 13257 ± 430 x 10 cél.mL with pig manure and biogas. The concentration of methane in the biogas purified reached 95% (v/v), with 88% efficiency in the enrichment of biogas. The calorific value increased from 5592 to 8372 kcal.m. The microalgae Scenedesmus disciformis was able to remove 60-99.3% of the nutrients of the pig effluent (nitrite, ammonia and phosphorus). These results demonstrate the high efficiency of microalgae for purifying biogas and its ability to bioremediate urban and agroindustrial effluent, reducing the production cost and producing high quality biomass. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.pipe.ufpr.br/portal/defesas/dissertacao/265.pdf |
| Alternate Webpage(s) | https://acervodigital.ufpr.br/bitstream/handle/1884/35640/R%20-%20D%20-%20BRUNO%20MIYAWAKI.pdf?isAllowed=y&sequence=1 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
