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Waste lipids to energy: how to optimize methane production from long‐chain fatty acids (LCFA)
The classical problems of lipids methanization in anaerobic processes are discussed and new concepts to enhance lipids degradation are presented and Reactors operation, feeding strategies and prospects of technological developments for wastewater treatment are discussed. Expand
Carbon nanotubes accelerate methane production in pure cultures of methanogens and in a syntrophic coculture
CNT affected methane production by methanogenic cultures, although acceleration was higher for hydrogenotrophic methanogens than for acetoclastic methanogen or syntrophic coculture, and increasing CNT concentrations resulted in more negative redox potentials in the anaerobic microcosms. Expand
Accumulation of long chain fatty acids onto anaerobic sludge under steady state and shock loading conditions: effect on acetogenic and methanogenic activity.
Accumulation of substrate onto the biomass was quantified under steady-state and shock conditions in a fixed bed reactor fed with an oleic acid-based synthetic effluent and the methanogenic activity of the same sludge after allowing the depletion of the adsorbed LCFA were significantly enhanced in the presence of all substrates, except in propionate. Expand
Enhancement of methane production from long chain fatty acid based effluents.
After the degradation of biomass-associated LCFA, the lag phases observed before the onset of methane production were significantly reduced, evidencing an increase in the tolerance of the acetotrophic methanogens to the presence of LCFA. Expand
Characterisation by image analysis of anaerobic sludge under shock conditions
In the present work the characterisation by image analysis of anaerobic biomass under organic and hydraulic shocks was performed. The digester was fed with a synthetic substrate, containing 50% oleicExpand
Continuous high rate anaerobic treatment of oleic acid based wastewater is possible after a step feeding start-up.
For the first time, it is demonstrated that a step feeding start-up is required to produce a specialized and efficient anaerobic community for continuous high rateAnaerobic treatment of LCFA-rich wastewater. Expand
Biochemical methane potential of raw and pre-treated meat-processing wastes.
Raw and pre-treated greaves and rinds, two meat-processing wastes, were assessed for biochemical methane potential (BMP) and anaerobic biodegradability was even reduced by the combined action of base and temperature. Expand
Garden and food waste co-fermentation for biohydrogen and biomethane production in a two-step hyperthermophilic-mesophilic process.
The energy generation predictable from co-fermentation and AD of GW:FW 90:10% is 0.5  MJ kg-1 and 24.4 MJ  kg-1, respectively, which represents an interesting alternative for valorisation of wastes produced locally in communities. Expand
Microbial and operational response of an anaerobic fixed bed digester to oleic acid overloads
The effect of oleic acid overloads on biomass accumulation and activity in an anaerobic filter was investigated. An anaerobic fixed-bed reactor specially designed to allow the regular withdrawal ofExpand
Methane production from oleate: assessing the bioaugmentation potential of Syntrophomonas zehnderi.
The potential for improving long-chain fatty acids (LCFA) conversion to methane was evaluated by bioaugmenting a non-acclimated anaerobic granular sludge with Syntrophomonas zehnderi with sepiolite, which stimulated a faster methane production from oleate and prevented the accumulation of acetate. Expand