| Title |
Urban Streams’ Water Quality and Odor Control Using Pure Oxygen and Vortex Aerator |
| Authors |
윤다인(Yoon, Dain) ; 최미정(Choi, Mijeong) ; 박성혁(Park, Sunghyuk) |
| DOI |
https://doi.org/10.12652/Ksce.2021.41.5.0493 |
| Keywords |
악취제어; 하천정화; 순산소; 용존산소; 와류용해기; 수질관리 Odor control; River purification; Pure oxygen; Dissolved oxygen; Vortex aerator |
| Abstract |
The target site, Goejeongcheon flows through downtown of Saha-gu, Busan and it connects to the Nakdong-gang estuary. But non-point pollutants and sewage sludge are partially flowing into the stream and deposited. As a result, dissolved oxygen concentrations of the stream were observed close to the anaerobic condition. Multistage Vortex Aerator was applied for restoring this
urban stream. It dissolves oxygen by repeatedly causing collisions between water and oxygen by vortex flow. The changes in water quality and odor were monitored for 2 months while circulating 1 m3/min of water with 22 ppm dissolved oxygen. As a result of the operation, the dissolved oxygen was improved from slightly Bad (4)~Bad (5) to Good (1b)~Normal (3) grade, and the total phosphorus concentration was decreased by 76 % on average. In the case of complex odor, a maximum reduction of 84.5 % was observed on the day the entire river was anaerobic. Through this study, we evaluated the feasibility of applying pure oxygen and Vortex Aerator for the the stream restoration. It is expected that the results of this study can be used for full-scale design. |