This research aims to evaluate the efficiency of nano-type oxygen diffusers at different pump power levels in sea bass nursery ponds. The study examines how varying power levels affect dissolved oxygen distribution in the water and their impact on the health, growth, and survival rates of sea bass. The findings indicate that pump power levels influence dissolved oxygen concentration, with the optimal power level improving oxygen distribution in the pond. This enhancement leads to higher survival and growth rates for sea bass. The results provide valuable insights for selecting appropriate oxygen diffusers and pump power levels in fish nursery pond systems. The experiment consisted of two conditions: 1. Without fish – This condition assessed the oxygenation capacity, oxygen transfer coefficient, oxygen transfer rate, and oxygen transfer efficiency of pumps at three different power levels. 2. With fish – This condition evaluated whether the oxygen supplied by pumps at three power levels was sufficient, based on the growth rate and survival rate of the fish in the pond. Blood counts were conducted to assess the immune response. The collected data were statistically analyzed using the RCBD method for the condition without fish and the CRD method for the condition with fish, employing SPSS software.
ประเทศไทยได้ประสบปัญหาในเรื่องของภัยธรรมชาติ ปัญหาการเปลี่ยนเเปลงสภาพภูมิอากาศ โดยเฉพาะปัญหาอุทกภัยและภัยเเล้ง สภาพอากาศแปรปรวน และยังมีปัญหาในด้านการทำประมงที่จำกัดดังนั้นการทำฟาร์มเลี้ยงสัตว์น้ำเเบบลดความเสี่ยงจึงเป็นทางออกในการรักษาความมั่นคงของอาหาร ในปัจจุบันปลาที่สามารถปรับตัวให้อยู่ในน้ำจืดหรือน้ำกร่อยได้และเป็นที่นิยมในการรับประทานได้เเก่ปลากะพงขาว เนื่องจากเลี้ยงง่ายโตเร็ว เนื้อปลารสชาติดี และมีราคาสูงพอคุ้มค่ากับการลงทุน โดยศึกษาจากการใช้อุปกรณ์สร้างออกซิเจนชนิดหัวนาโนบับเบิ้ลเพื่อศึกษาว่าอุปกรณ์ให้ออกซิเจนชนิดหัวนาโนกับขนาดกำลังปั๊มน้ำที่ต่างกันขนาดใดมีความสามารถทำให้ออกซิเจนละลายในน้ำดีมากที่สุด อัตราการถ่ายเทออกซิเจนในน้ำ ค่าสัมประสิทธิ์ออกซิเจนที่ละลายในน้ำได้มีประสิทธิภาพมากที่สุด วัดความเจริญเติบโต อัตรารอดของปลากะพงและภูมิคุ้มกันของปลากะพง ประสิทธิภาพในการให้ ออกซิเจน ในบ่ออนุบาลปลากะพงได้ดีที่สุดและมีผลกระทบน้อยมากที่สุด
คณะอุตสาหกรรมอาหาร
This research aims to develop plant-based Thai traditional sausage(Sai oua) using young jackfruit as the main raw material. To be an alternative to replace meat by studying the development of formula, changes in physical and physical chemistry during the preservation of the product, young jackfruit has dominant properties of meat-like fibres and can absorb the smell and taste of spices well. The results of the study found that young jackfruit that have been boiled at 100 degrees Celsius for 30 minutes have the fibre closest to cooked chicken. In addition, the study of changes during storage at different temperatures found that the colour and Water Activity (Aw) have changed slightly. While the pH value (pH) decreased and the value of Thiobarbituric Acid Reactive Substances (T-BARS) increased. In terms of texture, it was found that the toughness increased and the elasticity decreased. Compared to the control formula, this study suggests that young jackfruit is a suitable raw material for the production of fillings from plants.
คณะวิทยาศาสตร์
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คณะเทคโนโลยีการเกษตร
During this cooperative education program at the Bang Bo District Agricultural Office, Samut Prakan Province, a study was conducted on the costs and returns of rice cultivation using chemical inputs compared to using biopesticides in combination with chemical inputs among farmers in Bang Phli Noi Subdistrict, Bang Bo District, Samut Prakan Province.The objectives of this study were: To examine the costs and returns of rice cultivation using chemical inputs compared to using biopesticides in combination with chemical inputs among farmers in Bang Phli Noi Subdistrict, Bang Bo District, Samut Prakan Province. To explore the challenges of using biopesticides in rice cultivation among farmers in Bang Phli Noi Subdistrict, Bang Bo District, Samut Prakan Province. The study found that in the 2024/25 growing season, the total production cost for rice cultivation using biopesticides in combination with chemical inputs was 5,099.50 THB per rai, consisting of variable costs of 4,432.50 THB per rai and fixed costs of 667.00 THB per rai. Meanwhile, the total production cost for rice cultivation using only chemical inputs was 5,129.00 THB per rai, consisting of variable costs of 4,390.00 THB per rai and fixed costs of 739.00 THB per rai. The cost difference between the two methods was 114.50 THB per rai. Regarding the returns on rice cultivation in the 2024/25 growing season, the field using biopesticides in combination with chemical inputs yielded 1,000.00 kilograms per rai, with an average selling price of 8,500.00 THB per rai. Farmers earned a total revenue of 8,585.00 THB per rai and a profit of 3,485.50 THB per rai. On the other hand, the field using only chemical inputs yielded 1,000.00 kilograms per rai, with an average selling price of 8,500.00 THB per rai. Farmers earned a total revenue of 8,500.00 THB per rai and a profit of 3,371.00 THB per rai. The total income difference between the two cultivation methods was 114.50 THB per rai. In terms of challenges related to the procurement of biopesticides, it was found that biopesticides are difficult to obtain, with limited or no availability in certain areas. Additionally, relevant agencies do not provide continuous support for biopesticides, making this the most significant issue. Regarding the use of biopesticides, the most critical challenge is that once fresh biopesticides are mixed, they must be used immediately and cannot be stored, as their effectiveness deteriorates over time.