15 documents found, page 1 of 2

Anaerobic Digestion of Microalga Chlorella protothecoides and Metagenomic Analy...

ABSTRACT: Microalga Chlorella protothecoides materials were assessed as substrates for anaerobic digestion (AD) aiming at the simultaneous production of biogas/methane and pigments: whole autotrophic (AA) and heterotrophic algae (H); extracted heterotrophic microalgae from lipid production (HExt); and pretreated heterotrophic microalgae through enzymatic (HPEnz), autoclave (HPA), and ultrasound (HPU) processes....

Pretreatments applied to microalgae residues to enhance anaerobic digestion

ABSTRACT: Biomass of microalga Chlorella protothecoides, grown under autotrophic and heterotrophic conditions and subjected to pretreatments, were energetically valorized through anaerobic digestion process according to the substrates: autotrophic algae (A), heterotrophic algae (H), heterotrophic algae extracted (HE), autoclave pretreated heterotrophic algae (HPA), enzyme pretreated heterotrophic algae (HPE), u...

Pedagogical decisions of teachers and development of the students’ epistemic pr...

In this work we intend to highlight the relationships between the pedagogical decisions adopted by the teacher in the science and technology classroom and the development of students’ epistemic work. The main focus of our research work is the identification of teacher mediation traits regarding the decisions they adopt during their pedagogical action, and the understanding about how the decisions affect the dev...

Bioactive compounds through anaerobic digestion of heterotrophic microalgae res...

Several important biomolecules are available into anaerobically digested effluents that were obtained from the biodiesel production process using heterotrophically grown microalga Chlorella protothecoides. Defatted microalgae residues and crude glycerol may undergo anaerobic digestion, separately and in admixture, providing methane/hydrogen and a digestate exploitable for agriculture applications. Furthermore, ...

Valorization of chestnut manufacture process residues [Poster]

Dual-mode cultivation of Chlorella protothecoides applying inter-reactors gas t...

Chlorella protothecoides, a lipid-producing microalga, was grown heterotrophically and autotrophicallyin separate reactors, the off-gases exiting the former being used to aerate the latter. Autotrophic biomass productivity with the two-reactor association, 0.0249 g L-1h-1, was 2.2-fold thevalue obtained in a control autotrophic culture, aerated with ambient air. Fatty acid productivity was1.7-fold the control v...

Dual-mode cultivation of Chlorella protothecoides applying inter-reactors gas t...

Chlorella protothecoides, a lipid-producing microalga, was grown heterotrophically and autotrophicallyin separate reactors, the off-gases exiting the former being used to aerate the latter. Autotrophic biomass productivity with the two-reactor association, 0.0249 g L-1h-1, was 2.2-fold thevalue obtained in a control autotrophic culture, aerated with ambient air. Fatty acid productivity was1.7-fold the control v...

Microalgal symbiosis in biotechnology

This review provides an analysis of recent published work on interactions between microorganisms, especially the ones involving mainly nutrient exchanges and at least with one microalga species. Examples of microbial partners are given, with a remark to the potential application of cultures of an autotroph and a heterotroph, which grow simultaneously, taking advantage of the complementary metabolisms. These are...

Teaching science with experimental work and computer simulations in a primary t...

The objective of this work is to study how teachers’ mediation can promote the development of students’ epistemic practices (EPs), in a classroom environment, using computer simulations (CS) articulated with experimental work (EW). In particular, we want to explore characteristics of teacher mediation using CS articulated with EW as a didactical approach and what EPs occur when students work in the pathway from...

Biodiesel from microalgae Chlorella protothecoides growing at autotrophic and h...

Biodiesel is an alternative energy to fossil fuels, and is produced from biomass, therefore provides lower CO2 emissions. Currently, biodiesel is produced from plant oils, animal fats and used oils. These sources are low-yield which is a limitation to the production of biodiesel in large quantities. On the contrary, microalgae present a very high yield and can be produced in large amounts. The bio-refinery of m...