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Rungthip Kawaree

Bio: Rungthip Kawaree is an academic researcher from Maejo University. The author has contributed to research in topics: Renewable resource & Transesterification. The author has an hindex of 3, co-authored 3 publications receiving 50 citations.

Papers
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Journal ArticleDOI
TL;DR: Raffinose family oligosaccharides content in Glycine max seed of cultivar Chiang Mai60, a local soybean of Thailand, was investigated and it could be concluded that this cultivar showed the RFOs-rich content and a potential to be an effective prebiotic substance for food application.
Abstract: Summary Raffinose family oligosaccharides (RFOs) content in Glycine max seed of cultivar Chiang Mai60, a local soybean of Thailand, was investigated. RFOs and other low molecular weight sugars were extracted by 50% (v/v) ethanol and quantified by high-performance liquid chromatography (HPLC). The prebiotic property of this extract was subsequently studied by in vitro method. The results showed that the concentrations of raffinose, stachyose and verbascose were 6.74 ± 1.62, 145.32 ± 18.74 and 1.60 ± 0.52 mg g−1 dry seed, respectively, while glucose and sucrose were detected at 10.73 ± 1.35 and 13.28 ± 2.16 mg g−1 dry seed, respectively. The growth of four Lactobacilli probiotics were increased significantly in a basal liquid medium supplemented with this ethanolic extract as carbon source compared to glucose supplementation. Subsequently, defined mixed culture was studied and it was found that growth stimulation of total Lactobacilli by extracted sugars resulted in the suppression of Escherichia coli and Salmonella enterica serovar Typhimurium growth. It could be concluded that this cultivar showed the RFOs-rich content and a potential to be a source of an effective prebiotic substance for food application.

28 citations

Journal ArticleDOI
TL;DR: Results of biological production of hydrogen by green alga was isolated from fresh water fish pond in Sansai, Chiang Mai province, Thailand and the highest H2 was produced when cultivated cells in PLEM for 21 hours under light and then incubated under anaerobic adaptation for 4 hours.
Abstract: Biofuels are gaining attention worldwide as a way to reduce the dependence on fossil fuels. Biological Hydrogen (H2) production is considered the most environmentally friendly route of producing H2, fulfilling the goals of recycling renewable resources and producing clean energy. It has attracted global attention because of its potential to become an inexhaustible, low cost, renewable source of clean energy and appears as an alternative fuel. H2 production processes offer a technique through which renewable energy sources like biomass can be utilized for the generation of the cleanest energy carrier for the use of mankind. This paper presents laboratory results of biological production of hydrogen by green alga was isolated from fresh water fish pond in Sansai, Chiang Mai province, Thailand. Under light microscope, this green alga was identified as belonging to the genus Pediastrum and species P. duplex Meyen. The successful culture was established and grown in poultry litter effluent medium (PLEM) under a light intensity of 37.5 μmol-1m2 sec-1 and a temperature of 25°C. The nutrient requirements and process conditions that encourage the growth of dense and healthy algal cultures were explored. The highest H2 was produced when cultivated cells in PLEM for 21 hours under light and then incubated under anaerobic adaptation for 4 hours.

21 citations

01 Dec 2016
TL;DR: Experimental results obtained in the present study proved that the production of B. braunii by RNTEM is potentially feasible and the feasibility of biodiesel production directly from B.braunii biomass at laboratory scale achieved through direct transesterification process.
Abstract: Microalgae biodiesel are reported to be better than fossil fuels in terms of life-cycle energy performance. Green alga, Botryococcus braunii symbolizes one of the most favorable resources of biodiesel due to relatively high lipid content. The present study focused on the cultivation of Botryococcus braunii with the fed-batch in 4 L labscale continuously stirred tank reactors (CSTRs) through inexpensive red Nile tilapia effluent medium (RNTEM), biomass growth, protein, carbohydrate, lipid, hydrocarbon production and fatty acids profiles. Additionally, in this study we have evaluated the feasibility of biodiesel production directly from B. braunii biomass at laboratory scale achieved through direct transesterification process. B. braunii growth confirmed the highest biomass yield (8.57 g L −1 ) and 35.32% hydrocarbon content was observed. Further, 47.59% lipids, 16.39% proteins and 38.21% carbohydrates were observed under laboratory conditions. Fatty acid methyl esters (FAME) synthesis by direct conversion of B. braunii biomass was carried out using sulfuric acid as a catalyst and methanol as solvent. The experimental results obtained in the present study proved that the production of B. braunii by RNTEM is potentially feasible.

13 citations


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Journal ArticleDOI
01 Feb 2021-Fuel
TL;DR: In this paper, the availability of various oil resources and the advancements in technology related to oil extraction are discussed, and the need to develop integrated process technologies for biodiesel production to make the process more economical is emphasized.

134 citations

Journal ArticleDOI
TL;DR: In this article, the effects of using micro algae biodiesel in IC engines and its output characteristics for different micro- algae biodiesels have been highlighted and analyzed, and a technoeconomic analysis has been drawn.

92 citations

Journal ArticleDOI
TL;DR: In this article, response surface methodology (RSM) is used for predictive model and optimization of the whole experimental methods of reducing sugar and energy in a Dred sunflower stalks were pretreated by sodium hydroxide (NaOH) and Trichoderma reesei as a function of two variables: concentration of NaOH (%) and time for pretreatment (Day).
Abstract: The present paper discusses response surface methodology (RSM) as an efficient tactic for predictive model and optimization of the whole experimental methods of reducing sugar and energy. In this work, the application of RSM presented for optimizing reducing sugar and energy as compared with production between chemical and biological pretreatments. All experiments applied statistical designs in order to develop a statistic multivariate analysis model that provides to consider the effect of different parameters on a process and describe the optimum values of these variables to optimize the response. Dred sunflower stalks were pretreated by sodium hydroxide (NaOH) and Trichoderma reesei as a function of two variables: concentration of NaOH (%) and T. reesei (%) and time for pretreatment (Day) to receive reducing sugar and energy. The chemical pretreatment model was characterized by 13 runs, varying the variables at two factors, NaOH (1, 1.5, 2%) and Day (1, 2, 3). The biological pretreatment model was characterized by 13 runs, varying the variables at two factors, T. reesei (1, 1.5, 2%) and Day (1, 2, 3), by central composite design experimental design. In the chemical pretreatment, experiments performed at 2% (w/v) of NaOH for 3 days were used. The chemical pretreatment model at 2% NaOH for a 3-day release reduced sugar by 5.812 g/L and energy by 92.992 kJ/L; on the other hand, biological pretreatment model at 2% T. reesei for a 3-day release reduced sugar by 3.891 g/L and energy by 62.256 kJ/L, reducing sugar starter for fermentation by 49.0670 ± 6.4660 g/L and fermentation efficiency by 71.60% at 48 h fermented time.

76 citations

Journal ArticleDOI
01 Jan 2021-Fuel
TL;DR: In this article, the authors highlight the importance of SAPO-34 supported catalysts in terms of lower chain hydrocarbon selectivity, lower paraffinic and aromatic by-products ratio, catalyst stability, and renderability.

48 citations

Journal ArticleDOI
26 Feb 2018
TL;DR: This study achieved the upgraded biogas through biological purification contained 90.42% CH4 8.04% CO2 1.43% O2 and 0.11% other trace gases—a remarkable performance based on an efficiency criteria.
Abstract: Biomass from wetland aquatic grass and buffalo grass can be exploited for biogas production, because this substrate is plenteous and does not compete with food production. In this study, the grass substrate was physically pretreated by boiling with different retention time to increase its biodegradability and was examined in batch mode. Boiling pretreatment suggested that 100 °C with 2 h retention time was the best condition. The results showed that the optimum grass concentration in the 1:1 ratio of co-digestion mixture with manure produced the highest methane yield. The results suggested that co-digestion of buffalo grass and buffalo dung was a promising approach for improving biogas production. This study was achieved the upgraded biogas through biological purification contained 90.42% CH4 8.04% CO2 1.43% O2 and 0.11% other trace gases—a remarkable performance based on an efficiency criteria. Furthermore, the digestate has high nutrient concentrations that can potentially use as fertilizer.

45 citations