Wittayasara: Integration Apply Engineering and Industrial Technology

Low-cost Household Wastewater Treatment for Communities along the Wang River Lampang Province

2023-11-10T15:43:05+07:00

This research aimed to construct a low-cost household wastewater treatment machine for the community along the Wang River in Mueang District, Lampang Province, and to assess the efficiency of the community wastewater treatment machine. The study involved surveying the discharge of untreated household wastewater into the river, collecting wastewater samples for laboratory analysis, and testing the efficiency of oil absorption using wood charcoal and porous ceramic. The study also included designing and constructing a household wastewater treatment machine, with subsequent calculations of its efficiency. The study found that the average Biochemical Oxygen Demand (BOD) value, representing the organic content of household wastewater, was 240 milligrams per liter. The values for oil and fat were measured at 1,488 mg/L. The results of the study on the efficiency of wood charcoal in absorbing fat and oil revealed that a charcoal depth of 0.5 centimeters achieved the highest oil absorption at 91.17%. At the same time, porous ceramics of all sizes demonstrated an average oil absorption rate of 25%. The optimal combination of charcoal and porous ceramic was determined through various ratios. Ratios of 4:1, 1:0.5, and 2:1 exhibited the ability to absorb oil up to 99.82%, 99.78%, and 98.29%, respectively. Additionally, a comparison of the production costs of household wastewater treatment machines in the study with those available in the market showed that the prices in the study were somewhat lower, possibly due to the ease of finding materials and users' ability to assemble the machines.

Application of Forecasting Method for Reducing Storage Costs: Case Study of an Automotive Product Company

2023-12-09T12:52:30+07:00

This aim of this research was to create a comprehensive guide for predicting product requirements and managing storage costs through the application of the simple moving average (SMA) forecasting method. The investigation, initiated by filtering data from the total sales of a specific business, aimed to identify large-sized products within a designated product group, amounting to a total of 10 items. Subsequently, an in-depth analysis of the sales data for these products was conducted to identify a suitable forecasting method based on the observed data patterns. Following the analysis, it was determined that the optimal forecasting method for five of the products was the 6-month moving average, while the 2-month moving average was recommended for another four products. Additionally, one product was advised to utilize the 4-month moving average. The derived conclusion suggests that implementing these forecasting methods would result in an estimated annual reduction of approximately 9,729.70 Thai Baht per year in the overall cost of inventory management.

Improving The Efficiency of Parchment Coffee Sorting using ECRS Technique and Ergonomics: A Case Study of Farmers in Mae Chan Luang Village, Chiang Rai Province

2023-08-08T12:38:13+07:00

The objective of this research was to improve the efficiency of Arabica parchment coffee sorting using the ECRS technique and ergonomics. The study focused on the process of sorting parchment coffee manually and investigated the working methods using a left-right hand diagram. The aim was to find ways to standardize the working process by applying the principles of ECRS, which include ‘eliminate’, ‘combine’, ‘rearrange’, and ‘simplify’. Additionally, the research applied ergonomic principles to improve the parchment coffee sorting process. After studying the pre-improvement sorting process, which consisted of 16 steps, it was found that the average time taken by workers to sort parchment coffee was 3.54 minutes per kilogram. By implementing the principles of ECRS and ergonomics, unnecessary movements were reduced, unnecessary steps in the process were eliminated, a coffee bean sorting table was used, and sorting was done using both hands. The results showed that the working process was reduced to 7 steps, and the standard time for sorting parchment coffee by workers after the improvement was 3.06 minutes per kilogram, which is a reduction of 0.48 minutes per kilogram. This indicates a 13.6% increase in the efficiency of parchment coffee sorting.

Development of Energy Storage Technology using Organic Redox Battery

2023-12-08T15:46:06+07:00

The demand and installation capacity for alternative intermittent energy sources such as photovoltaic and wind energy are increasing, but such energy sources require a secondary power source such as a battery to maintain grid reliability and power quality. This research aimed to develop the prototype and evaluate the performance of an organic electrolyte redox flow battery. The redox flow battery prototype in this study was made of aluminum endplates, a brass current collector, a graphite flow field, and a Nafion® 117 membrane coated with Vulcan carbon using the ultrasonic spray technique. Anthraquinone-2-sulfonic acid (AQS) and 1,2-benzoquinone-3,5-disulfonic acid (BQDS) were used as the anode and cathode organic electrolytes, respectively. The results of comparing the flow rate of the parallel channel at Stage of Charge (SOC) at 100% showed that the flow rate of 300 ml/min had a higher voltage than the flow rates of 400 and 500 ml/min. At 2.31V, and a flow rate of 500 ml/min, the maximum current was 231.36 mA. Comparing the flow rate of the Serpentinel Channel SOC at 100%, it was found that the flow rate of 500 ml/min had the highest voltage equal to 1.59 V, and the flow rate of 400 ml/min had the highest current of 484.75 mA. The Serpentinel Channel test, at a flow rate of 500 ml/min, had the best redox flow battery cell performance. Due to its power value, it had the best performance of the redox flow battery cells. With an electric power of 19.2 mW and a maximum current of 0.04 amperes, it possessed an electric potential efficiency of 55.81%.

Design and Development of Water Hyacinth Rolling Machine

2023-10-11T16:09:58+07:00

The objectives of this research were to design and develop a motorized water hyacinth rolling machine to replace the old-style hand-cranked water hyacinth rolling machine, and to test the efficiency of the new motorized water hyacinth rolling machine. This research was carried out at the Ban San Bua Bok handicraft production group, Ban Sang, Muang, Phayao. Normally, water hyacinth is rolled using a hand-cranked water hyacinth rolling machine with a maximum production rate of 30 g/min which is insufficient for demand and causes fatigue during operation. The researcher designed a new machine that used 2 rolling mills, and evaluated its efficiency by comparing production rates between the old and modern style machines. The results of the study found that the thickness of the water hyacinth after rolling using the new machine was in accordance with the Thai Industrial Standards Institute: Water Hyacinth Product (OTOP 39/2003). The capacity rate increased from 1.8 kg/h (old machine) to 3.0 kg/h (modern machine) representing a 60% boost in operational efficiency. In addition, the motorized water hyacinth rolling machine had a maximum capacity rate of 8.4 kg/h, with a highest specific power consumption of 33.87 kg/kW×h.