Sanguanchaipaiwong, Vorapat

Preferred name

Alternative Name

Sanguanchaipaiwong, V.

Main Affiliation

School of Science

vorapat.sa@kmitl.ac.th

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Using Glycerol as a Sole Carbon Source for Clostridium beijerinckii Fermentation
(2017-01-01)
Sanguanchaipaiwong, Vorapat
;
Leksawasdi, Noppol
Butanol is a promising biofuel with its fuel properties which are similar to gasoline and able to be synthesized from acetone-butanol-ethanol fermentation of Clostridium sp. This study has been focused on using glycerol, a by-product from biodiesel manufacturing as a carbon source for Clostridium beijerinckii TISTR 1390. The culture was cultivated at 37°C in P2 medium with 20-60 g/L glycerol under anaerobic condition, compared with glucose as a control. Samples were collected periodically for the analysis of viable cell concentration, reducing sugar and metabolite concentrations. It has been found that C. beijerinckii grown much slower in glycerol. After 168 h cultivation, the cell growth in 20 g/L glycerol has achieved the maximum concentration of 4.78 × 106 CFU/mL. In P2 medium containing glucose, the amount of viable cell (3.93 x 106 CFU/mL with 20 g/L glucose) had reached the maximum level at 24 h. The much longer period for highest cell number might be the reason that C. beijerinckii could not produce butanol from merely glycerol. On the other hand, the butanol concentration of 8.12 g/L was obtained from 60 g/L glucose. Glycerol probably induced C. beijerinckii in switching to a reductive pathway.
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Butanol production by Clostridium beijerinckii from pineapple waste juice
(2018-01-01)
Sanguanchaipaiwong, Vorapat
;
Leksawasdi, Noppol
Renewable energy has received increasing attention, due to global energy crisis and limited supply of fossil fuels. Butanol is one of the alternative biofuels with the similar energy properties as gasoline, such as, energy density and heat of vaporization. It could be produced by Clostridia via acetone-butanol-ethanol fermentation from various renewable sources. To obtain economical raw materials, pineapple waste juice was utilized as a carbon source for Clostridium beijerinckii TISTR 1461. The juice was collected from ‘Pattavia' pineapple waste and utilized to prepare culture medium. The maximum viable C. beijerinckii concentration (2.40 ± 0.12 x 108 CFU/mL) was obtained at 168 h of cultivation with pineapple waste juice under anaerobic condition at 37 °C. The butanol concentration of 3.14 ± 0.16 g/L was subsequently produced. A yield of 0.08 g butanol∙g-1 reducing sugars was achieved suggesting the necessity to improve fermentation process for higher level of butanol concentration.
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Kinetic parameters of Candida tropicalis TISTR 5306 for ethanol production process using an optimal enzymatic digestion strategy of assorted grade longan solid waste powder
(2019-11-01)
Wattanapanom, Saengkae
;
Muenseema, Jidapa
;
Techapun, Charin
;
Jantanasakulwong, Kittisak
;
Sanguanchaipaiwong, Vorapat
The optimal enzymatic digestion strategy for assorted grade whole fruit longan solid waste powder (WF–LSWP) to release the highest level of fermentable sugars for subsequent production of ethanol using Candida tropicalis TISTR 5306 has been reported for the first time in this study with several important fermentation kinetic parameters. WF–LSWP contained relatively low lignin content (5.79 ± 0.43 %(w/w)) with the presence of relatively high starch and pectin contents of 27.9 ± 0.86% (w/w) and 2.07 ± 0.16% (w/w), respectively. Pretreatment by alkali and saturated steam before enzymatic digestion step did not result in the improvement of overall sugars being released. The implementation of commercial enzyme mixture (amylase, glucoamylase, cellulase, and xylanase) for one step enzymatic digestion at 50°C for 48 h resulted in the statistical significantly highest (p ≤ 0.05) specific overall sugars productivity of (141 ± 1.4) × 10–4 g total sugars/g WF–LSWP/digestion step/h. Cultivation of C. tropicalis TISTR 5306 in digested and concentrated WF–LSWP extract at concentration level of 90 g/l during 0 – 12 h resulted in the following statistical significantly highest (p ≤ 0.05) kinetic parameters; specific growth rate (m) of 0.097 ± 0.001 h–1 and specific ethanol production rate (q<inf>P</inf>) of 0.221 ± 0.010 gP/gX/h. Dried biomass yield (Y<inf>X/S</inf>) and ethanol yield (Y<inf>P/S</inf>) based on utilized sugars of 90 g/l WF–LSWP extract at 0.180 ± 0.018 gX/gS and 0.411 ± 0.044 gP/gS, respectively, were statistical significantly highest (p ≤ 0.05) in comparison with those of 16 and 45 g/l WF–LSWP extracts.
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Evaluation of cell disruption for partial isolation of intracellular pyruvate decarboxylase enzyme by silver nanoparticles method
(2015-07-01)
Tangtua, J.
;
Techapun, C.
;
Pratanaphon, R.
;
Kuntiya, A.
;
Chaiyaso, T.
Candida tropicalis TISTR 5350 was used in the comparison of seven concentration levels of silver nanoparticles (0, 5, 10, 15, 20, 25, and 30 μg ml-1) for cell disruption methods. The optimized cell disruption strategy was selected based on the optimal protein yield and biological activity. The maximum volumetric and specifi c pyruvate decarboxylase (PDC, EC 4.1.1.1) activities (0.53±0.05 U ml-1 and 0.17±0.02 U mg-1 protein, respectively) were observed at 15 μg ml-1 silver nanoparticles. The silver nanoparticle concentration level of 15 μg ml-1 was investigated further by comparing the reaction mixtures at different time intervals of 0, 1, 2, 3, 4, 5, and 6 min. The result showed that the highest specifi c PDC activity of 0.39±0.01 U mg-1 protein was obtained from mixing for 3 min. This was not significantly different (P≤0.05) from other mixing time intervals.
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Development of mathematical model for pyruvate decarboxylase deactivation kinetics by benzaldehyde with inorganic phosphate activation effect
(2018-05-01)
Khemacheewakul, Julaluk
;
Techapun, Charin
;
Kuntiya, Ampin
;
Sanguanchaipaiwong, Vorapat
;
Chaiyaso, Thanongsak
The effect of phosphate concentrations at 20, 250, 500, and 1,000 mM on phenylacetylcarbinol (PAC) production, pyruvate decarboxylase (PDC) deactivation kinetics, and combination of phosphate activation effect in a mathematical model were evaluated in a biotransformation system using whole cells of Candida tropicalis TISTR 5350. This is the first report of phosphate activation effect on pyruvate decarboxylase deactivation model. The highest PAC concentration (28.6 ± 2.3 mM), average instantaneous PAC formation rate (0.57 ± 0.01 mM/min), PAC yields (0.95 ± 0.08 on benzaldehyde and 0.71 ± 0.06 on pyruvate) were achieved in 1,000 mM phosphate buffer. PDC volumetric activity of 0.52 ± 0.07 U carboligase/ml at the reaction time of 180 min was obtained. The mathematical model describing deactivation kinetics of whole cells PDC by benzaldehyde with activation effect for phosphate buffer concentration level predicted individual experimental data for all four levels of phosphate buffer relatively well with corresponding residual sum of square (RSS), mean square (MS), and correlation coefficient (R2) range of 213-1,100, 5.32-27.5, and 0.96-0.99. The activation effect of 1,000 mM phosphate buffer was evident with an average enzyme activation rate constant due to buffering species concentration level (K<inf>a</inf>) of 1.34 × 10-2 % min-1 which was higher than 20 mM phosphate buffer (1.48 × 10-6 % min-1) by more than 9,050 times.
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Partial purification and comparison of precipitation techniques of pyruvate decarboxylase enzyme
(2017-01-01)
Tangtua, Julaluk
;
Techapun, Charin
;
Pratanaphon, Ronachai
;
Kuntiya, Ampin
;
Sanguanchaipaiwong, Vorapat
The intracellular pyruvate decarboxylase enzyme (PDC, EC 4.1.1.1) extract from Candida tropicalis TISTR 5350 was compared by two different purification methods using ammonium sulphate and acetone precipitation. The total volumetric PDC activity and percentage recovery (yield) of precipitated PDC based on 50% (v/v) cold acetone were significantly higher (1.13 ± 0.02 U/ml and 98.27 ± 2.98 %, respectively) than any other concentration levels of acetone used. Furthermore, all concentration levels of cold acetone also yielded a much higher specific PDC activity than the precipitate obtained using the 40 to 60% (w/v) ammonium sulphate saturation (0.75 ± 0.08 U/mg protein). The precipitated enzyme in buffer solutions from the 50% (v/v) acetone was subsequently freeze dried. Freeze drying of the precipitated PDC by cold acetone resulted in the specific PDC activity of 1.57 ± 0.02 U/mg protein and differed statistically (p ≤ 0.05) from the crude enzyme extract (control).
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DILUTE ACID HYDROLYZED SOYBEAN MEAL FOR CULTIVATION OF ISOLATED CLOSTRIDIUM SP. G10
(2022-01-01)
Sanguanchaipaiwong, Vorapat
;
Sabua, Chonthicha
;
Hemnusoornnanon, Nutcha
;
Nuangpanom, Phornnapa
;
Leksawasdi, Noppol
Soybean meal is a by-product from soybean oil manufacturing. It contained, on the mass basis, crude fiber (6.3%) and protein (47.6%) after oil extraction. The aim of study was to investigate the cultivation of isolated Clostridium sp. G10 using soybean meal hydrolysate as a N-and C-source in fermentation medium. Soybean meal hydrolyzed with 0.02 to 0.1 M of HCl and H2SO4 and was heated at 121 °C, 15 psi for 10-30 min. The result showed that hydrolyzing soybean with 0.1 M HCl and 20-min heating period were the optimal conditions to obtain soluble protein (24.45 ±2.21 g/L) and reducing sugar (13.12 ±1.09 g/L). To study the effect of N-and C-sources replacement in T6 medium, soybean meal hydrolysate was utilized to replace yeast extract and tryptone resulting in 8 g/L soluble protein and used as a C-source with the addition of glucose with 50 g/L reducing sugar equivalent. The butanol concentration (10.80 ±0.44 g/L) was slightly lowered than that of control T6 medium (12.15 ±0.07 g/L). These results demonstrated that Clostridium sp. was able to uptake the N-and C-sources contained in the hydrolyzed soybean meal. However, a C-source alternative is required to mitigate the cost of raw materials.

Sanguanchaipaiwong, Vorapat

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