Dissolved Oxygen, Temperature, and Total Ammonia Nitrogen Management of Penaeus vannamei Postlarvae 10 Hatchery Using Nanobubble Technology

Abstract

Nanobubble technology is known to be able to manage the water quality of aquaculture. This study aimed to measure and compare the water quality of Penaeus vannamei postlarvae (PL) 10 using nanobubble technology and conventional treatments. The PL densities were 2,000 individuals, consisting of the control group (without nanobubble treatment) and nanobubble treatment groups with DO levels equal to 16 and 22 mg/l. Three replications and 24-hour measurements for each group were conducted. The measured water quality includes dissolved oxygen (DO), temperature, and total ammonia nitrogen (TAN). The results confirmed that nanobubble has promoted the water quality by increasing DO and reducing temperature and TAN. The water quality under nanobubble level at 22 mg/l was improved in comparison to control. The 24-hour average of DO, temperature, and TAN of nanobubble treatment group were 10.52 mg/l (95% CI: 9.86, 11.2), 24.6 °C (95% CI: 24.5, 24.7), and 2.35 mg/l (95% CI: 0.86, 3.84). Meanwhile, the 24-hour average of DO,
temperature, and TAN for control were 9.94 mg/l (95% CI: 9.44, 10.4), 24.9 °C (95% CI: 24.8 to 25) and 2.58 mg/l (95% CI: 0.91, 4.25). To conclude, using 24-hour nanobubble can increase DO by 6%, and reduce the temperature and TAN by 2% and 9%.