Project/scholarship details
- Project/scholarship ID
46328
- Reference
POCTI/CTA/46328/2002
- FundRef URI
- Funder
FCT - Fundação para a Ciência e a Tecnologia, I.P.
- Funder's country
Portugal
- Funding program
POCI
- Funding amount
50,000.00 €
- Start date
2005-02-01
- End date
2008-01-31
Documents
Anaerobic biodegradation of oleate by a highly loaded biomass before and after ...
Salvador, Andreia Filipa Ferreira; Pereira, M. A.; Alves, M. M.Oleic Acid (C18:1) is an unsaturated Long Chain Fatty Acid (LCFA), described as especially problematic in anaerobic digestion processes. In this work, a sludge heavily loaded with 5985 mgCOD.gVSˉ¹ was studied in terms of its capability to biodegrade oleic acid in batch assays, in concentrations ranging from 100 to 1500 mg.lˉ¹. Lag phases before the onset of methane production increased with the oleic acid conce...
Discontinuous operation promotes efficient continuous anaerobic treatment of ef...
Cavaleiro, A. J.; Alves, J. I.; Alves, M. M.A mixture of skim milk and sodium oleate was fed to an upflow sludge bed reactor operated in cycles. Each cycle had a feeding phase under continuous operation and a reaction phase in batch. Five cycles were performed with organic loading rates applied during feeding phases varying between 4.4 and 8 kg COD.mˉ³.dˉ¹ and a constant hydraulic retention time of 1.6 days. In the first two cycles, 70% of the methane-CO...
LCFA accumulation and biodegradation during anaerobic discontinuous treatment o...
Cavaleiro, A. J.; Alves, J. I.; Alves, M. M.The dynamics of medium and long-chain fatty acids (LCFA) accumulation and biodegradation was studied during the anaerobic treatment of an oleate-rich wastewater. This treatment was made in an upflow sludge bed reactor operated in cycles during 213 days. Five cycles were performed, each one with a feeding phase in continuous and a reaction phase in batch. Saturated and unsaturated fatty acids from C6 to C18 were...
Efficient methane production from lipid-rich wastewater in high-rate anaerobic ...
Cavaleiro, A. J.; Salvador, A. F.; Alves, M. M.In this work, high rate anaerobic mineralization of a synthetic dairy effluent containing 50% COD as oleic acid was accomplished in two reactors operated in parallel. The anaerobic reactors were able to accommodate organic loading rates up to 21 kg COD m-3 day-1, HRT of 9 hours, attaining 99% of soluble COD removal efficiency and methane yield higher than 70%. Long chain fatty acids (LCFA) accumulated inside th...
Continuous high rate anaerobic treatment of oleic acid based wastewater is poss...
Cavaleiro, A. J.; Salvador, A. F.; Alves, J. I.; Alves, M. M.Mineralization of a synthetic effluent containing 50% COD as oleic acid was achieved in a continuous anaerobic reactor at organic loading rates up to 21 kg COD m−3 day−1, HRT of 9 h, attaining 99% of COD removal efficiency and a methane yield higher than 70%. A maximum specific methane production rate of 1170 ± 170 mg COD-CH4 g VS−1 day−1 was measured during the reactor’s operation. A start-up strategy combinin...
Waste lipids to energy: how to optimize methane production from long-chain fatt...
Alves, M. M.; Pereira, M. A.; Sousa, D. Z.; Cavaleiro, A. J.; Picavet, M. A.; Smidt, Hauke; Stams, Alfons Johannes MariaThe position of high-rate anaerobic technology (HR-AnWT) in the wastewater treatment and bioenergy market can be enhanced if the range of suitable substrates is expanded. Analyzing existing technologies, applications and problems, it is clear that, until now, wastewaters with high lipids content are not effectively treated by HR-AnWT. Nevertheless, waste lipids are ideal potential substrates for biogas producti...
Molecular profiling of microbial communities developed in high-rate anaerobic t...
Salvador, A. F.; Cavaleiro, A. J.; Pereira, M. A.; Alves, M. M.Fundação para a Ciência e a Tecnologia (FCT)
Molecular profiling of microbial communities in anaerobic bioreactors treating ...
Salvador, A. F.; Cavaleiro, A. J.; Pereira, M. A.; Alves, M. M.Fundação para a Ciência e a Tecnologia (FCT) - PTDC/BIO/69745/2006, POCTI/CTA/46328/2002, SFRH/BD/24256/2005, SFRH/BD/48960/2008
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