| Title |
The Effect of Cycle Time Ratio for Intermittent Aeration on Nitrogen Removal and Settling Characteristics With Type of Clarifiers in the Intrachannel Clarifier Oxidation Ditch |
| Authors |
이현동(Hyun Dong Lee), 조영무(Young Moo Cho), 정원식(Won Sik Chung) |
| Abstract |
This research was to evaluate the characteristics of organic material, nitrogen removal, and settling with HRT and to find the proper ratio of aeration and deaeration time for intermittent aeration process on nitrogen removal in the intrachannel oxidation ditch which was modified oxidation ditch and designed the capacity of 2 ㎥/day. The results were showed that the removal efficiencies of BOD, COD_(Mn), SS and N were about 90%, 90%, 93% and 50%, respectively. The major characteristics of settling and removal efficiency were not showed by the changes of HRT and intrachannel type. In case nitrogen removal, the rate of nitrification showed more than 93%, and denitrification rate was 30∼60%. But the efficiencies of settling and organic removal are equal to or higher than thouse of conventional oxidation ditch. Therefore, the most advantages of intrachannel oxidation ditch are lower construction cost which caused from the reduction of area and feasibility of O&M Management than the conventional oxidation ditch. |