9. Improving the efficiency of aerotank by using hydrogen peroxide (H2O2) and mechanical mixing to adjust dissolved oxygen content and aeration time

Bình Võ Thị Yên

Abstract

The aim of this study is to improve the aerotank efficiency using H2O2 and mechanical mixing to adjust dissolved oxygen content and aeration time. Two types of experiments were conducted: batch experiment and continuous flow experiment. In batch experiments, the H2O2 concentration was changed from 0 to 250 mg/L and aeration time was changed from 6 to 12 hours. The optimal concentration of H2O2 and optimal aeration time were 100 mg/L and 8 hours respectively. The oxygen uptake rate (OUR) was used for the evaluation of sludge activity. Continuous flow experiments were conducted to assess the effect of dissolved oxygen concentration on the treatment efficiency. The oxygen concentration varied with the aeration velocity and aeration method. The results show that the most appropriate aeration velocity for aerotank was 1 L/min. The effective aeration method was to supply the gas continuosly from the bottom of the tank. With the optimal operational conditions, the COD removal efficiency of the aerotank in this study was about 85%.

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Authors

Bình Võ Thị Yên
yenbinhmtk29@gmail.com (Primary Contact)
Võ Thị Yên, B. (2018). 9. Improving the efficiency of aerotank by using hydrogen peroxide (H2O2) and mechanical mixing to adjust dissolved oxygen content and aeration time. Science Journal of Natural Resources and Environment, (22), 71–79. Retrieved from https://tapchikhtnmt.hunre.edu.vn/index.php/tapchikhtnmt/article/view/115
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