Sakdasri, Winatta
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Item type:Publication, Ultrasonic-assisted Extraction of Dietary Fiber from Defective Lemon Basil (Ocimum basilicum var. citriodorum) Seed(2025-01-01); Lemon basil (Ocimum basilicum var. citriodorum) is an herbaceous plant cultivated for seed consumption only in Sukhothai Province, Thailand. Unlike cultivating for fresh leave consumption, the production of lemon basil seed requires maturity and reproduction phases, the same as rice and wheat. After harvesting, the farmer separates unmatured red basil seeds (RBS) because of their diverse color. The RBS contains valuable compounds, such as dietary fiber, that could be extracted by an ultrasonic-assisted extraction (UAE). This work aims to extract DF with the highest brightness using L*a*b* color in liquid form as an indicator. The optimal condition was identified by the crossing point between the brightness (L*) and extraction yield. The proximate nutrient analysis showed that RBS has a higher fiber content than high-quality basil seed (HBS). For water swelling ability, HBS performed 4-fold higher than RBS. The complete extraction of dietary fiber was observed at 10 min for UAE at 200 W, a water-to-seed ratio of 30:1, and 100% amplitude, and it was preferably conducted at room temperature (30±2°C) without an external cooling system. The correlation between UAE extraction time and temperature at constant total power and amplitude was also explored. When the extraction temperature exceeded 80°C, the extracted mucilage was rotten within 24 h, even if stored at 4°C. Moreover, the extracted RBS contained Omega-3 oil that a screw-press machine or supercritical CO2 could extract in further study. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Optimization of yield and thymoquinone content of screw press-extracted black cumin seed oil using response surface methodology(2023-01-01); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Biodiesel Production from Rambutan Seed Waste by Supercritical Ethanol: Economic Analysis(2025-01-01); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, A review of supercritical technologies for lipid-based biofuels production: The glycerol-free processes(2021-01-01); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Effects of reactor loading and solvent addition on catalyst-free glycerolysis of palm oil(2021-01-01); Ngamprasertsith, SomkiatGlycerol is a by-product of biodiesel production. Every three moles of biodiesel produced, glycerol is released in one mole, which is around 10 wt.% of the total products. The crude glycerol from supercritical transesterification has a higher purity than that from alkaline transesterification. Monoglyceride is an anionic surfactant widely used in many applications. In this work, the glycerolysis reaction of palm oil and glycerol was studied using isopropanol as the solvent. The investigated important parameters in this study were reaction time in range of 30-150 minutes, reactor loading in range of 40-80 %, and molar ratio of isopropanol to glycerol to palm oil in range of 0-30. The glycerol to palm oil molar ratio was constant at 5 to 1. The results showed that parameters affected conversions and yields were reactor loading and solvent addition. The highest monoglyceride yield, 37.4%, was obtained at 260 °C in 150 minutes and 40 % of reactor loading. Molar ratio of glycerol to palm oil to isopropanol is 5:1:15. A central composite design (CCD) of 48 experiments investigated the effects on monoglyceride content (%MG) of temperature (220 to 260 °C), reaction duration (30 to 150 min), and molar ratio of IPA to palm oil (0:1 to 30:1). The %MG was substantially and statistically significantly enhanced (p < 0.0001) at higher temperatures and longer reaction duration. An analysis of variance confirmed that the molar ratio of IPA to palm oil had a much less significant effect (p = 0.0255) on %MG. The crude glycerol obtained from a biodiesel production plant was compared with pure glycerol at the optimal condition. A %MG of 46.58% was observed using crude glycerol as reactant because of the yield-limiting effects of water in crude glycerol. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Biodiesel Production from Spent Coffee Grounds by Using Ethanolic Extraction and Supercritical Transesterification(2024-12-01); Sawangkeaw, RuengwitThis work presents a way to use ethanol and spent coffee grounds (SCG) as feedstocks for biodiesel production to solve ethanol overproduction in Thailand and biodiesel feedstock shortage problems together. Waste coffee oil (SCGO) was ethanolic extracted from SCG; then, ethanol-SCGO mixture was transesterified in supercritical condition without ethanol removal. The ethanolic extraction curves of SCG at a temperature range of 50–70 °C were constructed. Transesterification experiments were studied in a batch reactor and a continuous reactor at various temperatures (275–350 °C) and reaction time (5–40 min) under 15.0 MPa. The molar ratio of ethanol-oil mixture was set at 30:1. The highest ester content of 88.37 ± 3.00 wt% was found in biodiesel obtained at a temperature of 275 °C and a reaction time of 40 min in a batch reactor. Furthermore, excess temperature (< 300 °C) and reaction time (< 20 min) induced thermal degradation and promoted the loss of ethyl linoleate. For continuous reactor, the maximum ester content of 83.38 ± 5.86 wt% was observed at 325 °C and 29.4 min of residence time. Unlike in batch reactors, thermal degradation of ethyl linoleate was not observed in a continuous reactor. The results showed that ethanolic extraction and supercritical transesterification are alternative ways to produce biodiesel from SCG without removing extractant and using catalyst. From a prospective point of view, techno-economic analysis (TEA) and life-cycle assessment (LCA) of invented process should be conducted to ensure profitability and environmental benefits, respectively. Graphical Abstract: (Figure presented.) - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Biodiesel production from spent coffee grounds via ethanolic extraction and supercritical ethanol transesterification: technoeconomic analysis and life cycle assessment(2026-01-01); Hunsub, PanusornPrevious studies have developed biodiesel production methods from spent coffee grounds (SCGs) via ethanolic extraction and supercritical ethanol transesterification (EE-SET) to minimize the energy consumption associated with solvent evaporation. In this study, we perform a technoeconomic analysis (TEA) and a life cycle assessment (LCA) to evaluate the profitability and sustainability of EE-SET. The material and energy balances in the TEA and LCA were derived from Aspen Plus<sup>®</sup> V12 based on experimental data from previous research. The results from the base case indicated that EE-SET was unprofitable and posed a considerable environmental burden by disposing of defatted SCG (DSCG) as solid waste due to two main issues. First, the amount of DSCG was 4.8 times greater than the total biodiesel and glycerol produced. Second, landfilling DSCG incurred waste treatment costs and induced greenhouse gas (GHG) emissions simultaneously. Selling DSCG as a feedstock for solid fuel pellets offers an effective strategy for achieving profitability and sustainability. As such, EE-SET addresses the economic drawback of generating profit from selling DSCG while reducing waste treatment costs. Using DSCG as a solid fuel for environmental benefits increases ash disposal credit and substantially reduces GHG emissions. The incorporation of pelletizing units or biomass power plants into EE-SET represents a promising avenue for future research. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Effects of temperature and pressure on volatile compounds of black cumin seeds (Nigella sativa L.) oil extracted by supercritical carbon dioxide(2025-01-01); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Supercritical reaction between methanol and glycerol: The effects of reaction products on biodiesel properties(2021-12-01); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Effects of Defatting Pretreatment on Polysaccharide Extraction from Rambutan Seeds Using Subcritical Water: Optimization Using the Desirability Approach(2024-07-01); Karnchanatat, AphichartRambutan seeds are by-products generated from fruit-processing factories; the leftover seeds are buried in landfills, generating methane emissions. This work aimed to extract polysaccharides (POLS) from rambutan seeds by using subcritical water extraction (SWE). The effects of defatting pretreatment and operating parameters in SWE were investigated using a Box–Behnken design. The results show that defatting pretreatment significantly enriched the POLS yield, while it had no significant effect on the total sugar content. Using the desirability approach, the suitable feedstock for SWE was defatted rambutan seeds. The maximum desirability of 0.86 was found at a temperature range of 145–150 °C, an extraction time of 15 min, and a liquid–solid ratio of 10:1. The POLS yield and total sugar content were in the range of 52.33–55.63 g/100 g feedstock and 83.37–87.45 g/100 g POLS, respectively. The extracted POLS had an equivalent molecular weight of 413.70 kDa that could be used as an extender in plant-based products. In conclusion, the defatting pretreatment of rambutan seeds not only improved the POLS yield obtained via SWE but also generated additional lipids that could be utilized as an unconventional source of specialty fat.