The amount of dissolved oxygen (DO) in aquaculture ponds is considered to be one of the most important aspects for the survival of fishes. The water in aquaculture ponds is stratified into distinct layers with different DO caused by differences in temperature. This temperature difference occurs when the surface layer of water heated by the sun becomes hotter than the lower water layer. Since the top layer is in contact with the air it contains the most DO. On the other hand the deepest layer is isolated from the air it contains the lowest amount of DO. This study proposed an aeration system called a Solar Circulating-Water Aeration System (SCWAS). The SCWAS uses solar thermal energy to create a natural water circulation. In other words it provides an upward current of water from the bottom to the pond surface and a downward current from the surface to the bottom. This circulation creates the movement of surface water and then increases the DO content of the surface water. This water circulation moves highly oxygenated surface water to the bottom layer forcing low oxygen water from the bottom up to the surface where it can absorb oxygen. To evaluate this design concept the numerical simulations of the system were conducted using ANSYS Fluent software. According to the simulation results the SCWAS can provide the natural water circulation. It was found that a flow rate of 2.24 L/s is obtained when the ratio between the draft tube inlet (r) the draft tube outlet (R) the base (L) is 1: 2: 3. In addition an SCWAS prototype was built and installed in a tilapia aquaculture system. A calibrated measuring system was installed to investigate the prototype performance. The experimental results indicate that the average DO values at the water surface and at the bottom of the pond increased by 1.45 and 1.40 times respectively compared with those of a pond without SCWAS. Economic analysis shows that the payback period of SCWAS is 4.58 years and its investment cost is 17.49% less than that of the paddle-wheel aerator.

This research objective is to improve the overall equipment effectiveness of the water filtration systems in the case study of the Water Treatment Plant which divides the water production into 4 production lines. The water filtration system has an electric actuator and gear is the main machine in the water filtration system. An electric actuator and gear have more machine breakdowns. That makes the water filtration system is the bottleneck of the water production process. This research study is divided into two steps: the first step is the presentation of the equation and the steps to measure the Overall Equipment Effectiveness of the water filtration system. The equation used data from the computer maintenance management system to analysis on mean time between failure data (MTBF) mean time to repair data (MTTR) and water production process data. The results can be improved the overall equipment effectiveness of the water filtration system increased to 0.11% 0.68% 0.44% and 2.44% respectively in each production process line. And increased Quantity of Filtration Water increased to 328500 m3/year 1168000 m3/year 1022000 m3/year and 3832500 m3/year respectively in each production process line. In this research used the pillar of focus improvement. By adding a protection system to prevent machine breakdown because of the most of the problems are found that the protection system malfunctions. This is the most problem in the 4th And then used engineering knowledge to improve water production and the success factor are required a human resources of all parties to cooperate brainstorm and analyze the causes of various losses in order to eliminate them.

The purpose of this research was to develop innovative cleaning and disinfection products in the situation of COVID-19 and to transfer the production technology of innovative cleaning and disinfection products. The innovative product developed is a semi-liquid alcohol gel. The sample group used in this study was volunteered consisting of 10 people. The research tool was the satisfaction assessment form technology transfer and the development of innovative cleaning and disinfection products in the situation of COVID-19. Data were analyzed using statistical software packages. The statistics used were mean and standard deviation. The results showed that. 1. Innovative cleaning and disinfection products in the situation of COVID-19 developed as an innovation of semi-liquid alcohol gel products. Which has a concentration of 73.0 % v/v 2. Most of the trainees were satisfied with the overall technology transfer. Both speakers places periods facilities knowledge and benefits from receiving services are high. 3. Most of the trainees were satisfied with the technology transfer pattern as well as the duration of the training. Product innovation process Product innovation can be put into practice and product innovation is a guide to careers at a high level.

The development of the application to support tourism in Samut Songkhram province aims to develop accommodation search applications. Hotels attractions OTOP products to promote the distribution of OTOP products in tourist attractions to assess satisfaction with developed applications using AppSheet Google Sheet Google Map and other open-source software to develop and surveys to collect data assess satisfaction with built applications. Perform statistical data analysis Percentage average standard deviation The results showed that the application to support tourism in Samut Songkhram province Help promote comprehensive tourism in Samut Songkhram Province Enhances the distribution channels of OTOP products in tourist attractions. The results of the satisfaction assessment from 50 users in the sample system showed that users were satisfied with the application to support tourism in Samut Songkhram province with an average of 4.41 standard deviations of 0.06. Can be used.

: Research on the business model of curry paste products Ban Khlong Samrong Community Enterprise Ban Phaeo District Samut Sakhon Province towards a sustainable community economy the researcher aims to study and analyze a business model for curry paste products and to develop curry paste products. to be desired and choice for consumers by qualitative research and participative action research. (Participatory Action Research: PAR) and the research was conducted in 3 steps namely 1) to study the concepts and theories of Business Model Canvas in order to formulate a business model for Nam Prik Kaeng products; 2) Analyze the data from an in-depth interview. Focus group discussion from the stakeholders and 3) Content Analysis with the Nam Prik Kaeng product business model. Ban Khlong Samrong Community Enterprise Ban Phaeo District Samut Sakhon Province and summarized the research results by descriptive analysis. Enterprise Ban Phaeo District Samut Sakhon Province towards a sustainable community economy is to enable the development of a business model of the Ban Khlong Samrong Community Enterprise Group. By applying modern management knowledge to manage community enterprises The results of this research can be used to communicate and create mutual understanding among community enterprise members. as a guideline for further development of curry paste products And the knowledge from this research can be used to train the community enterprise group to have knowledge on business management. Suggestions from this research found that Ban Khlong Samrong Community Enterprise Ban Phaeo District Samut Sakhon Province still lacks knowledge in marketing. Therefore there should be an extension in the next market research project.