https://dspace.rmutk.ac.th/jspui/handle/123456789/3156 Tue, 14 Apr 2026 19:05:43 GMT 2026-04-14T19:05:43Z http://localhost:80/jspui/retrieve/70c79439-8dcb-4c52-8bb7-987925ea71bb/ https://dspace.rmutk.ac.th/jspui/handle/123456789/3156 https://dspace.rmutk.ac.th/jspui/handle/123456789/3182 Title: Turbidity and Color Reduction of Reused Boron-Based Solution from Wood Preservation Process of Rubber wood Processing Industry by Coagulation and Flocculation Authors: อุสารัตน์ ถาวรชัยสิทธิ์; พิชญา ธนาฒยนันต์; ศิริวัฒนา รินทรามี; อิทธิวัฒน์ บุญสร้างสม Abstract: The reusability of boron solution in wood preservation process using pressure impregnation process of the rubber wood processing industry causes the color in the solution to change from colorless to dark brown and even black as the increase number of its reused cycles. Applying those solutions to the process affects the natural color of the treated wood. This research was conducted to investigate the efficiency of coagulation and flocculation to reduce the turbidity and color of boron solution that was used as wood preservative. Types of coagulants, coagulant dosage and initial pH of boron solution were studied. Results showed that the maximum reduction of turbidity and color occurred when alum, ferric chloride (FeCl3), and polyaluminium chloride (PAC) at the amount of 4.7, 1.7, and 3.3 g/L, respectively, was added to boron solution with initial pH of 8.0. At the stated conditions, removal efficiency for turbidity were as follows: PAC (95.6%) > FeCl3 (92.1%) > Alum (87.4%). Color removal efficiency were as follows: FeCl3 (97.8%) > PAC (96.7%) > Alum (96.1%). The results of the current study can be used as preliminary information for the selection of coagulants for the removal of turbidity and color of boron solution for recycling purpose in the wood preservation process. Tue, 01 Jan 2019 00:00:00 GMT https://dspace.rmutk.ac.th/jspui/handle/123456789/3182 2019-01-01T00:00:00Z https://dspace.rmutk.ac.th/jspui/handle/123456789/3181 Title: Study of Mineralogy, Chemical Composition and Physical Properties of Clays from L°Cal Pottery Areas Rongang Community Pattani Province Authors: สุนารี บดีพงศ์; ปิยะ ผ่านศึก; อภิญญา ศุกลรัตน์ Abstract: Mineralogical, chemical composition and ceramic properties of clay from l°Cal pottery area in Rongang community Pattani Province were studied to assess their potential for use. The majority of clay was quartz with slightly kaolinite and illite. High SiO2 content (47.68-58.36%), Al2O3 (24.11-26.94%), Fe2O3 (2.35-3.18%) and TiO2 (1.32-1.46%) was determined. Large amount of clay (61.94%) with the size less than 45 µm were passed sieve number of 325 mesh as the fine particles resulting to increase the clay toughness. It was found that weight was rapidly decreased in the temperature range of 700-900 °C, the weight decreases slightly due to the loss of water and organic matter. Testing of clay after fired at temperatures of 700-900 °C was found that the linear shrinkage were 5.10-7.95%. Densities were 1.69-1.71 g/cm3. Flexural strength of colcined somples were 1.42-3.88 MPa. Clay from Rongang community can use as raw materials l°Cal pottery with a high Al2O3 content suitable for refractory products. The product was slightly shrinkage after the temperature of 900 ° C with non-deformation or distortion however, there were disadvantages with large quartz particles size higher than 300 µm resulting in rough texture, high porosity and less strength. Therefore, the quality of soil was improved, their properties will be also improved. Tue, 01 Jan 2019 00:00:00 GMT https://dspace.rmutk.ac.th/jspui/handle/123456789/3181 2019-01-01T00:00:00Z https://dspace.rmutk.ac.th/jspui/handle/123456789/3180 Title: The production of Activated Carbons from Nipa palm stalk in Palain River Basin Community, Trang Province Authors: สุปราณี วุ่นศรี; วราวุฒิ ดวงศิริ; นพดล โพชกำเหนิด Abstract: This study was investigated the properties of activated carbon prepared from Nipa palm stalk. The stalk was used to produce charcoal by carbonization process. The charcoal was then activated by chemicals. Reflux technique was used for heating in order to optimize the synthesis Conditions activated carbon from Nipa palm stalk. The optimized parameters were ratio of activated chemical to charcoal, time, absorption of Iodine, absorption of methylene blue. The results showed that the use of 30% of ZnCl2 at the ratio of 1:4 (w/w) of Nipa palm stalk activated carbon and activated chemical, activated time of 3 hours, gave the highest performance for Iodine absorption (659.90 ± 28.17 mg/g). This was higher than that of the industrial product standards which state a minimum Iodine absorption at 600 mg/g. The methylene blue absorption was 96.54 ± 0.15 % for 1.0 g/l of charcoal which is slightly lower than industrial product standards (98.94 % for activated carbon1.0 g/l) Tue, 01 Jan 2019 00:00:00 GMT https://dspace.rmutk.ac.th/jspui/handle/123456789/3180 2019-01-01T00:00:00Z https://dspace.rmutk.ac.th/jspui/handle/123456789/3179 Title: Improvement of temperature in compressor room to reduce the energy consumption of compressed air system Authors: ธีรนนท์ นามวงษา; ณัฐดนย์ พรรณุเจริญวงษ์; ฉัตรชัย เบญจปิยะพร; ผดุงศักดิ์ รัตนเดโช Abstract: This research aims to study the effect of temperature at compressor room on the energy consumption of compressed air system at Panasonic Manufacturing (Thailand) co. ltd Khon Kaen branch. The data was recorded for three periods. First period was pre and post compressed air system improvement to reduce temperature. The improvement was done by changing the exhaust fan capacity from 1,060 to 1,700 m3/min, and relocate installing position of vacuum suction from above the compressor to compressor exhaust. Then, the data including the temperature around machine and inside room, power consumption and air flow rate were measured by thermo logger, ECD power metter and flow rate meter, respectively. The results founded that an average temperature inside room was decreased from 38 to 33 °C, efficiency of the compressor was increased from 6.63 kW/m3/min to 6.4 kW/m3/min, and energy was decreased from 5,846 to 5,704 kWh/day. In addition, this improvement can reduce amount of carbon dioxide (CO2) for 27 tons per year. For second and third periods the results were observed when outside temperature was changed. The second period, there was energy consumption of 5,688 kWh/day when an average outside temperature was 31 °C. In addition, outside temperature at 36 °C, there was energy consumption of 5,737 kWh/day in the third period. From the results showed that it was the change of outside temperature does not affect on temperature at compressor room, but obtained from heat of machines. Therefore, temperature reduction can increase the efficiency of the compressor, resulting to save the energy as a production cost. Tue, 01 Jan 2019 00:00:00 GMT https://dspace.rmutk.ac.th/jspui/handle/123456789/3179 2019-01-01T00:00:00Z