Sriprom, Pongsert

Preferred name

Sriprom, Pongsert

Alternative Name

Sriprom, P.

Main Affiliation

School of Food Industry

pongsert.sr@kmitl.ac.th

Now showing 1 - 10 of 39

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Production of Cellulose From Bamboo Shoot Shell Using Hydrothermal Technique
(2021-01-01)
Manamoongmongkol, Kanjana
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Suwapanich, Rachit
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Phumjan, Lamphung
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Narkrugsa, Woatthichai
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Sriprom, Pongsert
The preparation and characterization of purified cellulose from bamboo shoot shell were studied using fouriertransform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The preparation of cellulose fiber included extraction of cellulose from bamboo shoot shell by treatment with 5 % NaOH and 4 % H2O2, and purification of cellulose fiber using hydrothermal technique. The result showed that cellulose has been successfully extracted at a 32.56% yield by the 5% NaOH / 4% H2O2 treatment, and the purified cellulose was produced using autoclaving at the temperature of 120°C and pressure at 0.1 MPa for 2 h 5 min, with the % recovery of purified cellulose around 94.08. Bamboo shoot shell and cellulose sample were further characterized using FTIR technique. It was found that the 5% NaOH / 4% H2O2 treatment eliminated lignin and hemicellulose from bamboo shoot shell but did not affect cellulose. The hydrothermal technique did not affect the destruction of the cellulose structure as well. Comparison of the SEM image showed that cellulose was separated into individual microfibers after the 5% NaOH / 4% H2O2 treatment while the SEM image of purified cellulose was the small thread-like fibers with smoother surface. Therefore, hydrothermal treatment can be performed for purification of cellulose.
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Lignin removal from synthetic wastewater via Fenton-like reaction over Cu supported on MCM-41 derived from bagasse: Optimization and reaction intermediates
(2023-02-01)
Sriprom, Pongsert
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Neramittagapong, Sutasinee
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Lin, Chitsan
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Neramittagapong, Arthit
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Assawasaengrat, Pornsawan
Lignin degradation was performed using a Fenton-like oxidation reaction with Cu supported on MCM-41, derived from bagasse (Cu-BG-MCM-41), as the catalyst. The optimal degradation conditions required to remove a predetermined amount of lignin (95%) from an effluent were determined. Based on the literature review and preliminary tests, the critical parameters determining the operating conditions include temperature, catalyst loading, pH, H<inf>2</inf>O<inf>2</inf> concentration, and reaction time. The experimental design and working conditions were based on Box–Behnken design. The reaction products were analyzed via UV–vis and gas chromatography-mass spectrometry. Response surface methodology (RSM) was used to predict the optimum operating conditions for the Fenton-like reaction for 95% lignin degradation, which were a temperature of 80 °C, initial pH of 9, H<inf>2</inf>O<inf>2</inf> concentration of 1 mL/L, catalyst loading of 1.0 g/L, and reaction time of 30 min. These conditions were validated three times and the achieved percentage of lignin degradation was 95 ± 2%. This is close to the value of 95% used in the RSM to determine the optimum operating conditions, thus verifying the model. The catalyst was stable and functioned well under the optimum design conditions. Moreover, the reaction could be used to obtain high-value intermediate products if stopped after 5 min. Finally, lignin was degraded into vanillin, a higher-value product. As expected, the proposed Fenton-like approach expanded the pH working range from less than 4 to 5–9.
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White rot fungus Pleurotus pulmonarius enhanced bioremediation of highly PCDD/F-contaminated field soil via solid state fermentation
(2020-10-10)
Kaewlaoyoong, Acharee
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Cheng, Chih Yu
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Lin, Chitsan
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Chen, Jenq Renn
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Huang, Wen Yen
This study was performed to evaluate the use of white rot fungus, Pleurotus pulmonarius, to treat polychlorinated dibenzo-p-dioxins and furans (PCDD/Fs) in contaminated soil using solid state fermentation (SSF). The soil was collected from a long-closed pentachlorophenol plant in southern Taiwan. The non-sterilized soil with a total PCDD/F concentration of 14,000 ± 2400 ng I-TEQ kg−1 was mixed directly with the solid fungal inocula at dry w/w ratio of 1:1.4 (ratio-adjusted test) and incubated at 26 ± 2 °C in a controlled environment. The highest PCDD/F decomposition was observed during the mycelium colonization. Pearson correlation coefficient (r) studied during this period (35 days) indicated that laccase had no significant correlation (r = −0.53), while manganese peroxidase had a strong positive correlation (r = 0.88) with PCDD/F decomposition efficiency. After 72 days, the more toxic congeners, tetra- and penta-CDD/Fs were removed to non-detectable levels. Meanwhile, the removal efficiencies of hexa-, hepta-, and octa-CDD/Fs were >80%, >97%, and >90%, respectively. The simultaneous degradation of low and high chlorinated DD/Fs suggested that overall removal was nonspecific. The overall PCDD/F removal was 96%, and the residual concentration (276 ng I-TEQ kg−1) was below the regulatory control limit (1000 ng I-TEQ kg−1). In conclusion, this study shows that P. pulmonarius via SSF can successfully remediate the PCDD/F-contaminated field soil. Furthermore, this SSF technique overcame the well-known intractability of PCDD/F biodegradation in non-sterilized soil, making it promising for actual field application.
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Optimizing Ammonia Adsorption Using Activated Carbon from Tamarind Pulp
(2021-01-01)
Na-Lampang, Chaiyawat
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Assawasaengrat, Pornsawan
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Phumjan, Lamphung
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Narkrugsa, Woatthichai
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Sriprom, Pongsert
Ammonia is an essential waste from fish and shrimp which has an effect on fish and shrimp transportation for export. This study aimed to remove ammonia by Activated Carbon adsorption. The activated carbon was prepared from Tamarind pulp using different methods (NaOH, H2SO4, the hydrothermal technique and activated by H2SO4 and H2SO4 hydrothermal followed by NaOH). The Activated Carbon was characterized by and Iodine number and Fourier Transform I nfrared Spectroscopy (FT-IR). The results showed that the iodine number of activated carbon prepared by the hydrothermal technique and activated by H2SO4 have the highest surface area and porosity at 537 mg/g, and the functional group on activated carbon surface is carbonyl and sulfonyl group. For ammonia adsorption, the experiments were designed by Box-Behnken design at 3 factors 3 levels including Contact time (10, 95 and 180 min), Dosage of activated carbon (0.5, 1.25 and 2.0 g) and pH of the solution (2, 6.5 and 11). The concentration of ammonia was determined by UV-Visible spectrophotometer. The result showed that the main effects and the interaction effects were found significant effect on ammonia adsorption at confidence level of 95%. However, the interaction effects between contact time and activated carbon dosage was insignificant. Finally, the optimized results suggested that 48.32 ± 0.82% of ammonia concentration could be removed by activated carbon from tamarind pulp under the following conditions: PH of 11, a contact time of 95 min, and activated carbon dosage of 2 g/100 mL. The results are believed to be of importance to fish and shrimp transportation for reduced ammonia and other similar applications.
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Soluble and Insoluble Varnish Test Methods for Trending Varnish Buildup in Mineral Turbine Oil
(2022-12-01)
Chokelarb, Wasan
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Assawasaengrat, Pornsawan
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Sitton, Andy
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Sirisithichote, Thanant
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Sriprom, Pongsert
Varnish problems in turbine oil of power plants in Thailand are still an issue today. The problems are the coefficient of friction of the oil will increase along with the increase in varnish concentration and varnish deposits. This creates problems in starting/re-starting of the turbine. Even with the advent of oil manufacturing research to improve base oil quality and antioxidant additive, varnish contamination starting problems have been one of the most concerning problems for maintenance. The most recent version of ASTM D4378-20 suggests that maintenance personnel should test their in-service turbine oil and monitor the membrane patch colorimetry with a warning limit at ∆E 30. This monitoring test is known as ASTM D7843-20 Standard Test Method for Measurement of Lubricant Generated Insoluble Color Bodies in In-Service Turbine Oils using Membrane Patch Colorimetry (MPC). This study introduces the monitoring of soluble color bodies, in addition to the insoluble, at the same time. Focusing only on the value of insoluble-MPC test can sometimes be misleading and may cause inaccurate and ineffective maintenance decisions. In this paper, both soluble and insoluble color body analytical results from in-service gas turbine oils will be presented. Three power plants were monitored for both soluble and insoluble varnish. It will show how the use of a combination of soluble and insoluble color body assessments of the turbine oils would further improve the oil diagnostic services of turbine lubricants by providing insights into the capability of the lubricants to solubilize the oxidation by-products of the antioxidants and the highly refined base oil. Appropriate varnish removal technologies were also decided and applied to respond proactively to the varnish issues.
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Optimization of lignin conversion to phenol via partial oxidation of synthesized wastewater containing lignin
(2020-12-01)
Sriprom, Pongsert
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Leephisuth, Pornyamon
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Assawasaengrat, Pornsawan
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Neramittagapong, Arthit
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Neramittagapong, Sutasinee
This work was to optimize operating parameters for phenol production via partial oxidation. The essential settings, NaOH loading of 4–20 g/L, reaction temperatures of 140–180 °C, and time of 15–45 min, were set as the independent parameters for designing the experiments. A set of tests was generated using Box–Behnken Design (BBD) and performed in a high-pressure reactor at the constant air pressure of 2 bars. A produced phenol concentration was assigned as a response target for evaluating an optimal condition. From the results, a quadratic model of actual data was fit with high accuracy (R2 of 94.1%). A response surface methodology (RSM) was used to evaluate the operating parameters effect on the phenol formation. It showed that the temperature rising affected phenol formation due to the creation of aldehydes at low temperatures and phenol re-polymerization. The presence of NaOH plays an essential role in the production of phenol. It may increase the hydroxyl group's rate to an aromatic ring that yields a high percentage of phenol production. For the reaction time, the longer time gave a higher yield of phenol. However, it slightly increased after 30 min. The predicted optimal condition was determined at the temperature of 161 °C, the NaOH loading of 16.4 mg/L, and the reaction time of 36.2 min. Three experiments were performed at the optimal point to verify the prediction. It was found that the phenol concentration of 30 ± 1 mg/L was yielded at this condition. Moreover, the reaction temperature and the initial pressure of air were not severe. It indicates that the partial oxidation of aqueous lignin solution can produce phenol at mild conditions.
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Innovative mycoremediation technique for treating unsterilized PCDD/F-contaminated field soil and the exploration of chlorinated metabolites
(2021-11-15)
Kaewlaoyoong, Acharee
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Chen, Jenq Renn
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Cheng, Chih Yu
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Lin, Chitsan
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Cheruiyot, Nicholas Kiprotich
Mycoremediation of unsterilized PCDD/F-contaminated field soil was successfully demonstrated by solid-state fermentation coupled with Pleurotus pulmonarius utilizing a patented incubation approach. The experiments were carried out in four setups with two as controls. The contaminated soil was homogenously mixed with solid inocula, 1:0.5 dry w/w, resulting in an initial concentration of 4432 ± 623 ng WHO-TEQ kg−1. After a 30-day incubation under controlled conditions, the overall removal (approx. 60%) was non-specific. The removal was attributed to degradation by extracellular ligninolytic enzymes and uptake into the fruiting tissue (~110 ng WHO-TEQ kg−1 of mushroom). Furthermore, less recalcitrant chlorinated metabolites were found, implying ether bond cleavage and dechlorination happened during the mycoremediation. These metabolites resulted from the complex interaction between P. pulmonarius and the indigenous microbes from the unsterilized soil. This study provides a new step toward scaling up this mycoremediation technique to treat unsterilized PCDD/F-contaminated field soil.
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Catalytic wet-air oxidation of aniline removal from synthetic wastewater
(2014-01-01)
Sriprom, Pongsert
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Assawasaengrat, Pornsawan
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Neramittagapong, Arthit
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Neramittagapong, Sutasinee
Wet-air oxidation (WAO) and catalytic wet-air oxidation (CWAO) over CuO/Al<inf>2</inf>O<inf>3</inf> and NiO/Al<inf>2</inf>O<inf>3</inf> catalysts for aniline removal were investigated. The oxidation reaction was carried out in a 1000-ml high-pressure batch reactor. The temperatures of 160, 200 and 260°C and the pressures of 5 and 10 bars were generally applied for 120 min. CuO/Al<inf>2</inf>O<inf>3</inf> and NiO/Al<inf>2</inf>O<inf>3</inf> catalysts were prepared by impregnation method. It is found from the results that aniline was completely degraded at these conditions. However, aniline was converted into other organic carbons which remained in the solution. So COD was found in the solution after the reaction. It is seen from the results that 56% of COD was removed by WAO at 200°C and 10 bars for 120 min. The CWAO over CuO/Al<inf>2</inf>O<inf>3</inf> catalyst showed higher COD removal (76%) than NiO/Al<inf>2</inf>O<inf>3</inf> catalyst (60%). The types of metal oxide had an effect to the activity of COD removal; that is, CuO showed higher COD removal than NiO. The WAO and CWAO of COD removal in aniline solution were the first-order kinetic with the constant reaction rate and activation energy for CuO/Al<inf>2</inf>O<inf>3</inf> of 0.234 s-1 and 11.772 kJ/mol, respectively. © (2014) Trans Tech Publications, Switzerland.
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Degradation of Penicillin G contaminant in synthesized wastewater by Fenton-like reaction
(2022-06-08)
Nisapai, Wiparat
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Paikamnam, Athipong
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Sriprom, Pongsert
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Neramittagapong, Sutasinee
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Theerakulpisut, Somnuk
The aim of this research was to investigate the degradation of Penicillin G (PEN G) in synthesized wastewater via a Fenton-like reaction. Calcium dioxide (CaO2) was used as an oxidant in the Fenton-like reaction. Factors of the PEN G degradation study such as pH, FeSO4, CaO2, and reaction time were determined using the Box-Behnken design (BBD). The experimental study was conducted in a 500 mL batch reactor, with 150 ppm initial concentration of PEN G. The results showed that PEN G degradation was optimal (38.67%) at pH 3, ferrous dosage of 0.08 g/L, CaO2 concentration of 1 g/L, and reaction time of 120 min. The degradation took place in the first 20 min. The reaction time was increased up to 120 min to achieve a pH of 8 in the test solution to meet the industrial effluent standard by the Ministry of Industry, Thailand. The kinetic study indicated second order and the pseudo first order reaction for the degradation in 0-20 min and 20-120 min, respectively. The research results indicated that pH, iron dosage, and CaO2 content-except reaction time-influenced PEN G degradation as predicted by the BBD. The degradation was substantially quick as well. Fenton-like reaction for a high concentration of PEN G should be used as pre-treatment.
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Optimization of Lignin Conversion by Hydrothermal Method for Recovery of Vanillin
(2020-10-20)
Sriprom, Pongsert
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Leephisuth, Pornyamon
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Neramittagapong, Arthit
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Neramittagapong, Sutasinee
This work aimed to optimize lignin conversion to vanillin by hydrothermal method. An experiment was designed by Box-Benhken Design (BBD). Temperature, NaOH concentration, and reaction time were chosen as independent parameters for achieving the optimum reaction condition. The reaction products were analyzed by high-performance liquid chromatography. Based on the experimental results, the optimum condition for the hydrothermal process was predicted using the response surface method. The maximum vanillin production of 18.1 mg/L was predicted at the optimum condition given by the temperature of 142 °C, NaOH concentration of 9.2 g/L, and reaction time of 32 min. The conversion of lignin to vanillin was experimented using the predicted optimal condition to verify the prediction. It was found that the hydrothermal method at the optimum condition yielded 18.1 ± 2 mg/L of vanillin, which was in good agreement with the predicted value. It was also found that the yield of vanillin was influenced by temperature, NaOH concentration, and the interaction of both parameters, whereas the reaction time was much less influential.

Sriprom, Pongsert

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