A study on pond purification capacity evaluation using micro bubble clarifier

Abstract

This study intended to evaluate the pond purification capacity using micro bubble clarifier. Also, in order to confirm the optimal pressure condition, analysis was performed for each pressure level at 1–4 kg_f/cm². It would be the most proper to operate at 3 kg_f/cm² and carry out speculation experiments. Pilot plant experiments were conducted in a water tank of approximately 8 m³. Raw water was obtained at the ponds of S University and a Golf course in full scale with volumes of 1,800 and 1,500 m³, respectively. Pilot plant results showed that the maximum saturated DO concentration rose up to 40 mg/L at the Pilot plant; and removal efficiencies of COD_Cr, BOD₅, T-N, T-P, SS and Chl-a were 46.6, 31.2, 34.3, 69.2, 82.8 and 69.1%, respectively. Then, a full-scale experiment was also carried out for the comparison with control site. According to the analysis of results, considerable treatment efficiencies were obtained for COD_Cr, BOD₅, T-N, T-P, SS and Chl-a with a high DO concentration because of the micro bubble. Water purification with a micro bubble clarifier is an environment-friendly purification method that can increase the natural purification capacity of natural water systems without the use of treatment facilities and chemicals for removing pollutants.

Keywords:

• Micro bubble
• Eutrophication
• Dissolved oxygen
• Algae
• Water purification

Notes

Presented at the 5th IWA-ASPIRE Conference, 8–12 September 2013, Daejeon, Korea