Improving gaseous biofuel production from seaweed Saccharina latissima: The effect of hydrothermal pretreatment on energy efficiency

Lin, Richen; Deng, Chen; Ding, Lingkan; Bose, Archishman; Murphy, Jerry D.

doi:10.1016/j.enconman.2019.06.044

Cited by 89 publications

(32 citation statements)

References 58 publications

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“…The peak around 1429 cm −1 could be attributed to the aromatic structure’s C–C stretching vibration. The peak at 1083 cm −1 is typical of aliphatic amines’ C–N and C–O–C stretching vibrations, indicating the presence of proteins and polysaccharides [ 46 , 47 ]. The FTIR spectra show that raw seaweed displayed high stretching vibration peaks corresponding to the O–H and N–H groups (3454 cm −1 ).…”

Section: Resultsmentioning

confidence: 99%

“…It is reported that the Gompertz models matched well with the experimental findings. The late reaction and eventual microorganisms adaptation to the fluctuating atmosphere is expressed in the lag phase ( λ ) [ 37 , 46 ]. The modified Gompertz model have λ values of 0.0227 and 0.0287 days, for US 10 min and MW + Fe 3 O 4 , respectively.…”

Section: Kinetic Studymentioning

confidence: 99%

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Efficiency of Fe3O4 Nanoparticles with Different Pretreatments for Enhancing Biogas Yield of Macroalgae Ulva intestinalis Linnaeus

et al. 2021

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In this work, different pretreatment methods for algae proved to be very effective in improving cell wall dissociation for biogas production. In this study, the Ulva intestinalis Linnaeus (U. intestinalis) has been exposed to individual pretreatments of (ultrasonic, ozone, microwave, and green synthesized Fe3O4) and in a combination of the first three mentioned pretreatments methods with magnetite (Fe3O4) NPs, (ultrasonic-Fe3O4, ozone-Fe3O4 and microwave-Fe3O4) in different treatment times. Moreover, the green synthesized Fe3O4 NPs has been confirmed by FTIR, TEM, XRD, SEM, EDEX, PSA and BET. The maximum biogas production of 179 and 206 mL/g VS have been attained when U. intestinalis has been treated with ultrasonic only and when combined microwave with Fe3O4 respectively, where sediment were used as inoculum in all pretreatments. From the obtained results, green Fe3O4 NPs enhanced the microwave (MW) treatment to produce a higher biogas yield (206 mL/g VS) when compared with individual MW (84 mL/g VS). The modified Gompertz model (R2 = 0.996 was appropriate model to match the calculated biogas production and could be used more practically to distinguish the kinetics of the anaerobic digestion (AD) period. The assessment of XRD, SEM and FTIR discovered the influence of different treatment techniques on the cell wall structure of U. intestinalis.

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Section: Resultsmentioning

confidence: 99%

Section: Kinetic Studymentioning

confidence: 99%

Efficiency of Fe3O4 Nanoparticles with Different Pretreatments for Enhancing Biogas Yield of Macroalgae Ulva intestinalis Linnaeus

et al. 2021

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“…Lipid content = Lipid weight (g) Dry cell weight (g) (6) pH and elemental compositions were determined according to the corresponding methods described by Zhang et al [28]. VS and TS of the samples were determined via the weighing method described by Lin et al [29]. The cellulose and hemicellulose contents were determined using the method reported by Van Soest et al [30].…”

Section: Methodsmentioning

confidence: 99%

Two-Stage Fermentation of Lipomyces starkeyi for Production of Microbial Lipids and Biodiesel

et al. 2021

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The high operating cost is currently a limitation to industrialize microbial lipids production by the yeast Lipomyces starkeyi. To explore economic fermentation technology, the two-stage fermentation of Lipomyces starkeyi using yeast extract peptone dextrose (YPD) medium, orange peel (OP) hydrolysate medium, and their mixed medium were investigated for seven days by monitoring OD600 values, pH values, cell growth status, C/N ratios, total carbon concentration, total nitrogen concentration, residual sugar concentration, lipid content, lipid titer, and fatty acids profiles of lipids. The results showed that two-stage fermentation with YPD and 50% YPD + 50% OP medium contributed to lipid accumulation, leading to larger internal lipid droplets in the yeast cells. However, the cells in pure OP hydrolysate grew abnormally, showing skinny and angular shapes. Compared to the one-stage fermentation, the two-stage fermentation enhanced lipid contents by 18.5%, 27.1%, and 21.4% in the flasks with YPD medium, OP medium, and 50%YPD + 50%OP medium, and enhanced the lipid titer by 77.8%, 13.6%, and 63.0%, respectively. The microbial lipids obtained from both one-stage and two-stage fermentation showed no significant difference in fatty acid compositions, which were mainly dominated by palmitic acid (33.36–38.43%) and oleic acid (46.6–48.12%). Hence, a mixture of commercial medium and lignocellulosic biomass hydrolysate could be a promising option to balance the operating cost and lipid production.

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“…Earlier studies suggested that prioritizing biogas production was a more economically favorable approach to biofuels production from macroalgae [26]. Over the years, macroalgae have yielded high conversion efficiencies in the production of several other biofuels, including fermentative production of bioethanol using enzymatic hydrolysis, mostly due to higher carbohydrate contents [27], hydrothermal pretreatment followed by dark fermentation to produce biohydrogen and anaerobic digestion to produce biomethane [28]. Most algae species are unicellular and commonly referred to as microalgae.…”

Section: Renewable Energy and The Prospects Of Microalgae Biofuelsmentioning

confidence: 99%

Factors Affecting Microalgae Production for Biofuels and the Potentials of Chemometric Methods in Assessing and Optimizing Productivity

Musa

Ayoko

Ward

et al. 2019

Cells

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Microalgae are swift replicating photosynthetic microorganisms with several applications for food, chemicals, medicine and fuel. Microalgae have been identified to be suitable for biofuels production, due to their high lipid contents. Microalgae-based biofuels have the potential to meet the increasing energy demands and reduce greenhouse gas (GHG) emissions. However, the present state of technology does not economically support sustainable large-scale production. The biofuel production process comprises the upstream and downstream processing phases, with several uncertainties involved. This review examines the various production and processing stages, and considers the use of chemometric methods in identifying and understanding relationships from measured study parameters via statistical methods, across microalgae production stages. This approach enables collection of relevant information for system performance assessment. The principal benefit of such analysis is the identification of the key contributing factors, useful for decision makers to improve system design, operation and process economics. Chemometrics proffers options for time saving in data analysis, as well as efficient process optimization, which could be relevant for the continuous growth of the microalgae industry.

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Improving gaseous biofuel production from seaweed Saccharina latissima: The effect of hydrothermal pretreatment on energy efficiency

Cited by 89 publications

References 58 publications

Efficiency of Fe3O4 Nanoparticles with Different Pretreatments for Enhancing Biogas Yield of Macroalgae Ulva intestinalis Linnaeus

Efficiency of Fe3O4 Nanoparticles with Different Pretreatments for Enhancing Biogas Yield of Macroalgae Ulva intestinalis Linnaeus

Two-Stage Fermentation of Lipomyces starkeyi for Production of Microbial Lipids and Biodiesel

Factors Affecting Microalgae Production for Biofuels and the Potentials of Chemometric Methods in Assessing and Optimizing Productivity

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