ผลกระทบของอุณหภูมิต่อปริมาณออกซิเจนละลายน้ำและคุณลักษณะของน้ำในระบบผลิตฟองอากาศด้วยกลไกการทำความเย็น

Abstract

This study aimed to evaluate the impact of temperature on dissolved oxygen and water characteristics in a bubble generation system with cooling mechanism. Experiments were conducted under three temperature conditions (21 ^oC, 23 ^oC, and 25 ^oC) and three storage periods over two weeks. The investigated parameters included dissolved oxygen (DO), total dissolved solids (TDS), electrical conductivity (EC), and pH. The findings indicated that DO exhibited a significant decreasing trend with increasing temperature, with the highest value recorded at 21 ^oC (11.6 mg/L) and the lowest at 25°C (10.5 mg/L). In contrast, TDS and EC showed significant increasing trends as temperature rose, reaching maximum values of 91.7 mg/L and 184.3 µS/cm, respectively, at 25 ^oC. The pH ranged between 7.4 and 7.9, reflecting a tendency toward higher pH values at elevated temperatures. Two-way ANOVA confirmed that temperature exerted significant effects on DO, TDS, EC, and pH, whereas storage duration partially influenced DO and pH. No significant interaction effect between temperature and storage duration was observed. Overall, the results highlight temperature as a critical determinant of water quality characteristics, reducing DO while increasing TDS, EC, and pH. These insights provide useful implications for optimizing water treatment system design and enhancing water quality management in agricultural applications.