Sakdasri, Winatta
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Item type:Publication, Aqueous Extracts of Lemon Basil Straw as Chemical Stimulator for Gray Oyster Mushroom Cultivation(2022-05-01) - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Simultaneous extraction of crude polysaccharides, soluble proteins, gingerols, and shogaols from dried ginger by subcritical water extraction(2025-06-01); ; Subcritical water extraction (SWE) is a remarkable method for the simultaneous extraction of high- and low-polarity bioactive compounds from ginger. This study investigated the effects of temperature, pressure, and extraction time on the crude polysaccharide yield, protein content, total phenolic content (TPC), and amounts of 6-gingerol and 6-shogaol. The pressure was maintained at 30 bars, and the temperature and extraction time were optimized to maximize the polysaccharide yield, protein, TPC, gingerols, and shogaols contents. The rising temperatures (100–160 °C) and extended extraction times (10–50 min) enhanced the yield and TPC but negatively affected protein stability, leading to thermal degradation when the temperature surpassed 180 °C. Specifically, the content of 6-gingerol decreased at high temperatures because of its conversion into 6-shogaol. The optimal extraction conditions were 160 °C for 40 min at 30 bars, resulting in a polysaccharide yield of 8.54 %, protein content of 100.35 mg body surface area/g dry mass, TPC of 18.10 mg Galic acid (GA)/g dry mass, 6-gingerol content of 2.14 mg/g dry mass, and 6-shogaol content of 0.28 mg/g dry mass. Therefore, SWE effectively extracts various polar bioactive compounds from plant materials in a single step. - Some of the metrics are blocked by yourconsent settings
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, 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, Pressurized hot water extraction of crude polysaccharides, β-glucan, and phenolic compounds from dried gray oyster mushroom(2022-10-01); ; Sawangkeaw, RuengwitThis study aimed to investigate the effects of temperature (100 °C–140 °C), pressure (0.4–1.0 MPa), and extraction time (20–60 min) on the extraction yield of crude polysaccharides, β-glucan, and total phenolic compounds with pressurized hot water extraction of gray oyster mushrooms (Pleurotus sajor-caju (Fr.) Singer). The extraction conditions were optimized by maximizing all responses, using a central composite design (CCD)-based response surface methodology. Temperature mainly affected the increase in the extracted yield and phenolic content. However, exceeded temperature and extraction time negatively affected the β-glucan yield. The optimal extraction conditions were at 140 °C, 0.92 MPa, and 40 min with a corresponding extraction yield of 3.20 ± 0.17 g/100 g, as well as β-glucan and total phenolic contents of 43.84 ± 3.86 mg/100 g and 8.49 ± 0.66 mg gallic acid equivalent/100 g dried extract, respectively. The antioxidant activities of extracts were estimated by in vitro biological assays. The SC<inf>50</inf> values of DPPH, NO, and ABTS assays were 1.66 ± 0.02, 1.50 ± 0.19, and 6.94 ± 1.04 mg/mL, respectively. This work demonstrates an alternative approach to valorize over-produced mushrooms. - 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);