Microalgae dewatering based on forward osmosis employing proton exchange membrane

Son, Jae Cheol; Sung, Mina; Ryu, Hoyoung; Oh, You-Kwan; Han, Jong‐In

doi:10.1016/j.biortech.2017.07.086

Cited by 22 publications

(11 citation statements)

References 29 publications

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“…The comparison of the concentration of alkaline reagent used in the pre-treatment stage and the selection of the most favorable process parameters to obtain the highest monosugars yield were elaborated using the Box-Behnken experimental design which method is often used for optimization purposes regarding biomass hydrolysis and processing [38]. The values of the investigated alkaline reagent concentration and pre-treatment time were selected on the basis of the range of variables described previously for a wide range of lignocellulosic biomass [39][40][41][42]. The influence of the size of lignocellulosic biomass particles on delignification process was also investigated.…”

Section: Feedstock Investigated Parameters Response Referencementioning

confidence: 99%

Optimization of Saccharification Conditions of Lignocellulosic Biomass under Alkaline Pre-Treatment and Enzymatic Hydrolysis

et al. 2018

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Abstract:Pre-treatment is a significant step in the production of second-generation biofuels from waste lignocellulosic materials. Obtaining biofuels as a result of fermentation processes requires appropriate pre-treatment conditions ensuring the highest possible degree of saccharification of the feed material. An influence of the following process parameters were investigated for alkaline pre-treatment of Salix viminalis L.: catalyst concentration (NaOH), temperature, pre-treatment time and granulation. For this purpose, experiments were carried out in accordance to the Box-Behnken design for four factors. In the saccharification process of the pre-treated biomass, cellulolytic enzymes immobilized on diatomaceous earth were used. Based on the obtained results, a mathematical model for the optimal conditions of alkaline pre-treatment prediction is proposed. The optimal conditions of alkaline pre-treatment are established as follows: granulation 0.75 mm, catalyst concentration 7%, pre-treatment time 6 h and temperature 65 • C if the saccharification efficiency and cost analysis are considered. An influence of the optimized pre-treatment on both the chemical composition and structural changes for six various lignocellulosic materials (energetic willow, energetic poplar, beech, triticale, meadow grass, corncobs) was investigated. SEM images of raw and pre-treated biomass samples are included in order to follow the changes in the biomass structure during hydrolysis.

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Section: Feedstock Investigated Parameters Response Referencementioning

confidence: 99%

Optimization of Saccharification Conditions of Lignocellulosic Biomass under Alkaline Pre-Treatment and Enzymatic Hydrolysis

et al. 2018

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“…A variety of FSs, such as sewage [75,76], grey water [77], and microalgae [76,78], have been examined for their feasibility in different FO applications. Study on these commercially available FSs and other unexplored FSs is very important to understand their applicability, sustainability and economic feasibility in FO processes.…”

Section: Feed Solutionsmentioning

confidence: 99%

Factors Affecting the Performance of Membrane Osmotic Processes for Bioenergy Development

et al. 2020

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Forward osmosis (FO) and pressure-retarded osmosis (PRO) have gained attention recently as potential processes to solve water and energy scarcity problems with advantages over pressure-driven membrane processes. These processes can be designed to produce bioenergy and clean water at the same time (i.e., wastewater treatment with power generation). Despite having significant technological advancement, these bioenergy processes are yet to be implemented in full scale and commercialized due to its relatively low performance. Hence, massive and extensive research has been carried out to evaluate the variables in FO and PRO processes such as osmotic membrane, feed solutions, draw solutions, and operating conditions in order to maximize the outcomes, which include water flux and power density. However, these research findings have not been summarized and properly reviewed. The key parts of this review are to discuss the factors influencing the performance of FO and PRO with respective resulting effects and to determine the research gaps in their optimization with the aim of further improving these bioenergy processes and commercializing them in various industrial applications.

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“…Primary DS used in FO for microalgae dewatering are synthetic salts, such as NaCl, MgCl 2 , CaCl 2 , KCl, NH 4 Cl [66][67][68][70][71][72][73][74][75]77], mimicking the constituents of seawater. The concentrations used range from 0.5 to 5 M, which is much higher than the salt concentration in seawater [78].…”

Section: Draw and Feed Solutionsmentioning

confidence: 99%

“…The most explored microalgae were Chlorella vulgaris, with different strains from many culture collections, e.g., Chlorella vulgaris [67], Chlorella sp.ADE4 [69], Chlorella sp. KR-1 [72], Chlorella vulgaris (UTEX 2714, Austin, TX) [73], Chlorella vulgaris (FACHB-36) [74], Chlorella vulgaris KCTC AG 10002 [76]. The microalgae were cultivated with different media such as BG-11, modified bold basal media (BBM), selenite enrichment (SE), and Bristol medium (BM) in different bioreactors.…”

Section: Draw and Feed Solutionsmentioning

confidence: 99%

Microalgae in Food-Energy-Water Nexus: A Review on Progress of Forward Osmosis Applications

et al. 2019

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Nowadays the world is facing vulnerability problems related to food, energy and water demands. The challenges in those subsystems are intertwined and thus require inter-discipline approaches to address them. Bioresources offer promising solutions of the dilemma. Microalgae biomass is expected to become a superfood and a favorable energy feedstock and assist in supplying clean water and treat wastewater. Efficient mass production of microalgae, both during upstream and downstream processes, is thus a key process for providing high quality and affordable microalgae biomass. This paper covers recent progress in microalgae harvesting and dewatering by using osmotic driven membrane process, i.e., forward osmosis. Critical factors during forward osmosis process for microalgae harvesting and dewatering are discussed. Finally, perspective on further research directions and implementation scenarios of the forward osmosis are also provided.

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Microalgae dewatering based on forward osmosis employing proton exchange membrane

Cited by 22 publications

References 29 publications

Optimization of Saccharification Conditions of Lignocellulosic Biomass under Alkaline Pre-Treatment and Enzymatic Hydrolysis

Optimization of Saccharification Conditions of Lignocellulosic Biomass under Alkaline Pre-Treatment and Enzymatic Hydrolysis

Factors Affecting the Performance of Membrane Osmotic Processes for Bioenergy Development

Microalgae in Food-Energy-Water Nexus: A Review on Progress of Forward Osmosis Applications

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