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Bioaugmentation strategies to enhance long chain fatty acids (LCFA) conversion ...

Bioaugmentation of bioreactors with LCFA-degrading bacteria is a possibility for improving methane production from lipid-rich wastes/wastewaters. Cavaleiro et al. [1] has shown that methane production from oleate (unsaturated LCFA) is faster and more efficient in batch tests bioaugmented with Syntrophomonas zehnderi, a bacterium that is able to degrade a wide range of both saturated and unsaturated LCFA [2]. In...

Functionalizing self-assembled GaN quantum dot superlattices by Eu-implantation

Self-assembled GaN quantum dots (QDs) stacked in superlattices (SL) with AlN spacer layers were implanted with Europium ions to fluences of 1013, 1014, and 1015 cm−2. The damage level introduced in the QDs by the implantation stays well below that of thick GaN epilayers. For the lowest fluence, the structural properties remain unchanged after implantation and annealing while for higher fluences the implantation...

Numerical study on the influence of initial anisotropy on optimal blank shape

http://www.sciencedirect.com/science/article/B6V36-4TG8K7H-1/2/f5bb6c39fe2ad213cc96ece4a2f3a08e

Is there an ACE ID-ACTN3 R577X polymorphisms interaction that influences sprint...

Sensitivity study on some parameters in blank design

Sensitivity study on various numerical parameters is necessary for modeling a process. It is important to determine the influence of such parameters in order to achieve robust design. Initial blank shape is a process parameter that controls the quality of a formed part. This paper describes a blank shape optimization procedure that uses three numerical tools to determine an optimal blank shape for a formed part...

Blank design for deep drawn parts using parametric NURBS surfaces

Deep drawing is a forming process controlled by a number of parameters. The initial blank shape is one of the most important process parameter that has a direct impact on the quality of the finished part. This paper describes a new method to determine the optimal blank shape for a formed part using the deformation behaviour predicted by finite element simulations and salient features of NURBS surfaces. The prop...

Development of a novel reactor for high-rate anaerobic treatment of LCFA contai...

LCFA accumulation and biodegradation during anaerobic discontinuous treatment o...

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...

Discontinuous operation promotes efficient continuous anaerobic treatment of ef...

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...

Trimming of 3D solid finite element meshes using parametric surfaces: Applicati...

In this paper we present a methodology for trimming 3D solid finite element meshes using a non-uniform rational B-spline (NURBS) surfaces representation. The algorithms applied in the identification of the spatial position of the finite element (FE) nodes and elements relative to the trimming surface are described, as well as, the explanation of the correction methods adopted to geometrically rearrange the trim...