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Browsing UB - Resumos em livros de actas by Subject "Anaerobic digestion"
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- Anaerobic digestion of enzymatically treated dairy cow effluent [Resumo]Publication . Eusebio, Ana; Marques, Susana; Marques, Isabel PaulaABSTRACT: In Portugal, cattle production increased up to 91,000 t in 2016 (EUROSTAT, 2016) and has been contributing to the increase of methane emissions into the atmosphere. As an appropriate process for the treatment of organic effluents, anaerobic digestion is ideal to minimize this negative impact since it provides the agricultural and energetic valorisation of the substrate through the production of digestate and biogas. Heating, cooling and electricity supply constitute different applications for this energy carrier gas with a relevant social, environmental and economic importance, mainly for the region and neighbouring areas where it is produced. Dairy cow effluent is an example of lignocellulosic biomass, whose recalcitrant compounds, such as lignin and phenols, must be previously hydrolysed and made available for subsequent anaerobic digestion. The use of laccase and hemicellulase may be of great interest as pre-treatment for a wide range of pollutant compounds of effluents.
- Anaerobic digestion of pre-treated microalgae biomass [Resumo]Publication . Neves, André; Silva, Teresa Lopes da; Reis, Alberto; Ramalho, Luís; Eusebio, Ana; Marques, Isabel Paula
- Energetic potential of piggery effluent by anaerobic digestion [Resumo]Publication . Eusebio, Ana; Ramalho, Luís; Carvalheiro, Florbela; Gírio, Francisco; Marques, Isabel PaulaABSTRACT: The sector of pig farming in Portugal is looking for sustainable and practical solutions to overcome existing environmental problems caused by very polluting discharges of effluents in rivers and wastewater treatment plants. The anaerobic digestion (AD) is a suitable process used to treat an organic effluent and, simultaneously, provide the agricultural and energetic valorisation of the substrate. The main objective of this work was to evaluate the energetic potential of a piggery effluent, collected in a pig farm with 9,000 animals, estimated in a volume of 900-1,170 m3 d-1. Anaerobic digestion assays were carried out in batch mode, under anaerobic and mesophilic conditions.
- Phenolic waste valorization through bioenergy and bioactive compounds production [Resumo]Publication . Morana, A.; La Cara, F.; Marques, Isabel PaulaThe agricultural and industrial processing activities produce large amounts of waste that are only partially valorised at different value-added levels (spread on land, animal feed, composting), whereas the main volumes are managed as waste of environmental worry. These by-products are rich sources of bioactive compounds, including phenolic compounds with high antioxidant activity.