Antoinette Kazbar

Wageningen University & Research | WUR · Division of Bioprocess Engineering

Deep eutectic solvents (DES) are green alternatives for conventional solvents. They have gained attention for their potential to extract valuable compounds from biomass, such as seaweed. In this framework, a case study was developed to assess the feasibility of pressure-driven membrane processes as an efficient tool for the recovery of deep eutecti...

Large amounts of astaxanthin (about 4% DW) can be produced under nitrogen starvation of Haematococcus pluvialis in photobioreactors (PBRs) exposed to high light conditions to induce a light stress. However, in PBR, the large biomass concentration usually achieved leads to strong light attenuation conditions, which makes complex the analysis of this...

The biorefinery concept facilitates the extraction of different constituents from seaweed, ensuring full usage of resources and generating few residues through a succession of steps. Innovative and environmentally-friendly extraction techniques, dubbed “green processing technologies,” have been developed in recent years. Using the bioprocess simula...

Cellular agriculture could represent a more sustainable alternative to current food and nutraceutical production processes. Tisochrysis lutea microalgae represents a rich source of antioxidants and omega-3 fatty acids essential for human health. However, current downstream technologies are limiting its use. The present work investigates mild target...

Microalgae appear to be an original feedstock, with several applications of interest in many areas. In addition to a diversified biochemistry opening up to many uses, photosynthetic growth in dedicated cultivation systems makes it possible to combine this production with a waste recovery strategy: effluents from various industrial sources can be co...

A miniaturized, small-scale photobioreactor (PBR) known as EOSS2-PBR (Efficient Overproducing Screening System photobioreactor) has been developed to characterize microalgal growth under controlled conditions. As with similar systems, EOSS2-PBR allows the screening of either culture conditions or species performance, but it is also specially design...

Design dark fraction reflects the unlit part of a microalgal culture system, as for example a hydraulic loop used for temperature or pH regulation, or a circulating pump for mixing purposes. This study investigates the impact of design dark fraction on photosynthetic biomass productivity of the eukaryotic microalgae Chlorella vulgaris. The effect o...

High concentrations of dissolved oxygen can inhibit the growth of photosynthetic microorganisms in microalgal culture systems. Not taking into account this parameter can also affect the reliability of mathematical models predicting biomass productivity. This study investigates the impact of high dissolved oxygen concentrations (C O₂) on biomass pro...

This study investigates simultaneous pH and dissolved oxygen control (DO) in a closed photobioreactor (PBR), using a conventional linear feedback technique, i.e. individual PID and PID coupled with feedforward compensation. The proposed control scheme has been designed using linear approximations, whereas their evaluation has been done through simu...