Journal of Industrial Technology Ubon Ratchathani Rajabhat University

Optimal Organic Loading Rate for Biogas Production System for Soybean Meal Fed Black Soldier Fly Processing Wastewater

Suradech Rungthong — 2025-10-30

This research was to study the optimum Organic Loading Rate (OLR) for wastewater treatment of the Black Soldier Fly Larvae (BSFL) processing. The inoculum was sludge from the biogas system in a pig farm. The biogas system in this study was a floating drum digester mixed with biogas recirculation. The OLRs were added in the biogas reactor as 1.00, 2.00, and 3.00 kgCOD/m³day, respectively. The hydraulic retention time (HRT) was 20 days. The experiments operated on the ambient temperature. Biogas volume and methane content value were measured during the operations. The result showed that the operation of different OLR 1.00, 2.00, and 3.00 kgCOD/m³day, with mixing could produce average cumulative biogas volume of 1,214.17, 1,716.04, and 1,714.48 Lite, respectively. The average methane content was 66.64%, 69.02%, and 67.22% respectively. The OLR of 2 kgCOD/m³day was the optimum organic loading rate. The COD removal efficiency was 66.29%, the total solid removal was 65.95% and the volatile solid removal was 81.15%. This was the most suitable and efficient condition for treating the BSFL wastewater. It can be further studied in larger biogas systems. It could be possible to decrease the impact of wastewater and water pollution on the environment.

Design of Rice Post-Harvest Moisture Reduction Machine: A Case Study of Ban Ek Community, Yaa Plao Subdistrict, Mueang District, Sisaket Province

Wachirasak Kienwong — 2025-10-30

This research aims to 1) design and construct a paddy dryer to reduce the moisture content to 14 percent after harvesting and 2) to evaluate the efficiency of the paddy dryer after harvesting. The research procedure is divided into two steps: 1) study and develop a paddy dryer, design and construct an innovation for reducing the moisture content of paddy after harvesting. Use a 11.5 horsepower walk-behind tractor engine as the power source. The main components are a conical cylindrical temperature control tank, a set of paddy conveying screws, a set of hot air supply, a set of paddy outlet direction control, the amount of paddy for testing is 200 kilograms, and evaluate the efficiency. 2) Disseminate the innovation by transferring knowledge to farmers. The research results showed that it was possible to reduce the moisture content of paddy after harvesting to an average moisture content of 14 percent within an average time of 210 minutes. The average gas consumption was 900 grams per hour. The average oil consumption was 1.2 liters per hour. The total energy cost was 65 baht per hour. The energy cost per production cycle was 227.5 baht. When compared to the traditional method, it was found that the efficiency of moisture reduction using the moisture reduction innovation could reduce the moisture reduction time better than the traditional method. The target group's evaluation results in terms of design, satisfaction score 4.55, standard deviation 0.46, usability, satisfaction score 4.19, standard deviation 0.39, structure, satisfaction score 4.55, standard deviation 0.37, and overall evaluation results in all aspects, satisfaction score 4.43, standard deviation 0.41. The satisfaction level is statistically significant.

The innovative distance measurement equipment for athletics competition (long jump)

Arin Phromthep — 2025-10-30

This study's primary objectives were 1) to develop novel distance measurement equipment designed specifically for use in long jump competitions, and 2) to investigate the effectiveness and efficiency of the developed equipment in accurately measuring distances in long jump competitions. The researcher used acrylic material, which is lightweight and strong, to develop and reach the concept. The researchers use theoretical frameworks and fundamental concepts to develop instruments that comply with predetermined objectives and to predefine testing procedures, and the resulting outcomes are evaluated for the purpose of enhancing their effectiveness. Rovinelli's and Hambleton techniques were used to evaluate the equipment's quality. Five experts evaluated and determined the index of consistency with the innovation, the index of item objective equivalence with expert ratings, and the index of item reliability. The findings indicated that the compliance index with respect to the distance measured by the distance meter was consistently 1.00 for all items and it was found that each item had a specific precision greater than 0.5, and when applying distance measurement in long jump competitions using innovative distance measuring equipment and distance meter to assess the actual competition field. It appears that the testing of the two varieties of tools is statistically identical, which is accurate and allows them to be used in international competitions.

Removal of Effluent Organic Matter (EfOM) from Ubon Ratchathani University by Combined Coagulation Process and Nanofiltration Membrane

Apinya Onsarn — 2025-10-30

This research studied the application of combined coagulants and nanofiltration (NF) membrane for removing effluent organic matter (EfOM) from wastewater treatment system in Ubon Ratchathani University. The membrane sheets used were obtained from GE Water & Process Technologies (model HL4040HM). The filtration experiments were conducted using a dead-end filtration test cell. The factors studied include: (1) coagulant types such as aluminum sulfate and ferric chloride, (2) solution pH level ranging from 4 to 10 (3) coagulant concentrations from 10 to 50 mg/L and (4) EfOM concentrations from 5 to 15 mg/L. The filtration pressure was operated constant at 60 psi in the NF test cell. The experimental results showed that aluminum sulphate with pH of 10 was suitable to remove the highest turbidity rejection of 68.18%, while ferric chloride at a pH of 4 was effective in the highest turbidity removal of 75.69%. The concentration of both coagulants at 40 mg/L provided the highest organic rejection. For the result of combined coagulation process and NF, it was found that the increased EfOM concentrations at 5, 10 and 15 mg/L resulted in flux reduction throughout filtration period. The removal efficiencies of EfOM after the coagulation process were approximately 96.13%, 96.16% and 96.90%, respectively for the combined aluminum sulphate and NF membrane. and approximately 96.08%, 93.76% and 93.28%, respectively for the combined ferric chloride and NF membrane.

Multifunctional Furniture Design to Increase Usable Space for Small Residential

Kamolwan Saengthamthawee — 2025-10-30

The objectives of this research are: 1) to study the needs of consumers in relation to small living spaces, 2) to design multifunctional furniture suitable for use and to evaluate consumer satisfaction, and 3) to produce prototypes and test them to meet the Thai Industrial Standards (TIS) 107-2563. This study employed surveys and interviews to assess consumer needs and utilized experimental methods in the production and testing of prototypes. The study revealed that the most common issue faced by consumers is limited usable space, which is insufficient for their needs, and that the living room is the most utilized area. Multifunctional furniture designs include a coffee table that combines a dining table and a desk. According to experts, multifunctional furniture suitable for small living spaces should not exceed 50x80 centimeters in size and should be 41 centimeters high, with robust construction, slightly rounded edges, and versatility in function. Consumer satisfaction with the furniture design showed that Design 1, which measures 45x80 centimeters and is 41 centimeters high, emphasizes functionality with features such as storage drawers and a bookshelf, along with a work desk approximately 74 centimeters high. Utilizing a multi-purpose foldable steel frame with modern wooden legs to make the living space appear larger. This research can save approximately 79.31% of usable space, add value by about 23.68%, and provide valuable knowledge that can be applied to similar businesses, contributing to the economic development of the industrial sector.

Design And Development of Biodegradable Sawdust Nursery Trays

Benjawan Panmaen — 2025-10-30

The objectives of this research are 1) to study the process of forming seedling trays from sawdust using wet starch glue as a binding material 2) to design seedling trays suitable for use 3) to produce seedling trays. Seedlings must be in accordance with community industrial product standards. A total of 6 experimental methods were used in different mixing ratios by weight. Formed using a hydraulic press. Study the physical characteristics of the seedling trays after being removed from the mold. Study properties and test for deterioration The method of collecting data was from a sample of 12 farmers who produced seedlings in Hankha District, Chainat Province, and in-depth interviews with a sample of 5 entrepreneurs using a specific random sampling method. Using statistics to analyze the data, it was found that 1) the molding process for experimental set A06, which had a mixture ratio of wet starch glue : sawdust 60 : 40, was the most moldable. Can be formed into full leaves. 2) Entrepreneurs have a need for nursery trays of standard rectangular shape and size and when considering the chemical characteristics of the raw materials It has an appropriate pH value for plant growth. 3) Physical characteristics and properties according to community industrial product standards were found to be durable, harmonious, not cracked, have a smooth, uniform brown surface, and have a size of 5 cm at the top and 5 cm at the bottom. 4 centimeters, height 5 centimeters, thickness 0.5 centimeters, weight 246.66 grams and has a humidity value of 25.94 ±1.43, a water absorption value of 66.79±5.56%, a swelling value of 7.38±0.85%, a porosity value of 6.46±1.66%. Able to absorb water well It has the slowest deterioration.

Developing a Prediction Model for Coronavirus-2019 infections Base on Patient Symptoms

Kriengsak Yothapakdee — 2025-10-30

The objectives of this research are: 1) to develop a prediction model for coronavirus-2019 infection from patient symptoms using data mining techniques 2) to compare and evaluate the performance of the model. The patient condition dataset was collected according to the guidelines of the World Health Organization and the All India Institute of Medical Sciences (AIIMS). This dataset contains a total of 5,434 records, which are divided into 4,348 records for learning and 1,086 records for testing. 10 significant features were carefully selected from a list of 21 to be used in the data mining algorithm's process of learning. The CRIPS-DM approach served as the main research methodology for this study. The learning methodology consists of 8 algorithms: Random Forest, Naïve Bayes, Support Vector Machine, Neural Network, Ada-Boot, K-Nearest Neighbor, Logistic Regression, and Decision Trees. Learning processes and prediction models' performance is evaluated through classification accuracy, precision, sensitivity, and specificity. The study's findings showed that neural network algorithms provide the best learning performance. When various parameters were adjusted in this approach, the prediction model achieved the highest efficiency of 91.40% with the learning rate set to 0.1, ReLU as the activation function, and the maximum number of iterations set to 200. To summarize the results were that, the development of a prediction model for coronavirus-2019 infection based on patient symptoms using a neural network algorithm has shown best predictive performance.

The optimization of Bamboo Sawdust and Plastic Composite in the Polystyrene-Based Resin (PBR) Matrix for Laminate Plate Production

Jirapatpong Senabut — 2025-10-30

Bamboo sawdust is generally reinforced in composite materials to apply laminated sheets. This research aims to synthesize laminated sheets with a mixture of bamboo sawdust and plastic using polystyrene as a matrix. In preparation, the weight proportion of bamboo sawdust was adjusted in the polystyrene solution as a matrix from the chemical recycling process that dissolved in organic solvents together with the mechanical process in solvent stirring. Next, the hydraulic compression machine formed laminate plates by the cold pressing technique. The plates were examined for the physical properties following ASTM Standards including thickness, moisture content (%), water absorption (%), and water contact angle test, respectively. The results showed the ratio of bamboo sawdust to polystyrene was 16:20 %wt due to the %moisture, %absorption, and the average angle indicated that the laminate sheets have hydrophobic properties which demonstrate the effective water-repellent capabilities.

A Development of Solar Powered Automatic Shrimp Feeding Machine

Wasan Khongsaiya — 2025-10-30

The objectives of this research were: 1) to develop a solar power shrimp feeding machine; and 2) to evaluate its performance. This research was to propose a solar power shrimp feeding machine development. The accomplishment was solved the shrimp feeding problems by human implementation. Therefore, this research has been conducted to design and development a solar power shrimp feeding machine that save the labour cost amount 72,000 Baht/year. As the experimental set-up, the timeframe was implemented during April to July 2024. The study was conducted in Moo 1, Bang Phra Sub-district, Pakpanung District, Nakhon Si Thammarat. The research results indicated that: 1) a solar power shrimp feeding machine had the highest performance in July 2024, with an average daily electrical power output of 64.93 W, representing 99.59% of its maximum capacity (65.2 W), and solar irradiance measured at 420 W/m²; 2) An evaluation of shrimp growth rates showed that those fed using the solar-powered machine had a higher average weight (323±9.84 g per 100 shrimps) compared to those fed manually. This experiment was conducted from April to July 2024; and 3) The system’s operation and control, were tested 7 times via a smartphone application, demonstrated precise on-off timing in accordance with the preset schedules. The research findings suggested that a solar power shrimp feeding machine is yielded both performance and reliable for application in shrimp farming.

Effects of Rice Husk Fiber Treatment on the Polishing Pad from Rice Husk Fiber Mixed with Polyurethane.

Mighttho Ketsuwan — 2025-10-30

This research aimed to study the effects of treating rice husk fiber with hydrochloric acid and sodium hydroxide mixed with polyurethane on the properties of polishing pads. Rice husk fibers, sized to 80 mesh, were mixed with polyurethane at ratios of 0, 2.5, 5, 7.5, 10, and 12.5 parts per hundred resin (phr) to create polishing pads with a diameter of 120 mm and thickness of 5 mm for hardness testing. Abrasion resistance was assessed using cylindrical specimens with a diameter of 15 mm and height of 16 mm, while water absorption tests were conducted on 10 g samples of the polishing pads. The results indicated that polyurethane mixed with each type of rice husk treatment could be molded into a polishing pad. The hardness of the pads made from rice husks treated with hydrochloric acid and untreated husks showed no significant difference. However, the polishing pads made from hydrochloric acid-treated rice husks exhibited higher abrasion resistance and lower water absorption compared to those made from untreated husks. In contrast, polishing pads made with sodium hydroxide-treated rice husks demonstrated decreased hardness across all ratios, although their abrasion resistance and water absorption both increased. From the research study, it can be concluded that treating rice husks with hydrochloric acid improved abrasion resistance and reduced water absorption without affecting hardness.