| Title |
A Study on Autocontrolled SBR for Biological Nutrient with External Carbon Sources |
| Authors |
이병헌 ( Byung Hun Lee ) ; 강성재 ( Seong Jae Kang ) ; 임성일 ( Sung Il Lim ) ; 유평종 ( Pyung Jong Yoo ) |
| Abstract |
The purpose of this study is to develop effective operating process in order to achieve more suitable conditions of Anoxic-Oxic-Anoxic-Stripper(AOAS) SBR through real-time control. To improve the removal efficiency, glucose, methanol and synthetic food waste acid fermentant were added as an external carbon source, In the case of glucose and synthetic food waste acid fermentant, TN, TP were removed to average 86.9%, 73.0% respectively. Methanol was removed to average 64.6%, 55.4% respectively. The synthetic food waste acid fermentant proved to be the most efficient and allowed for the substitution of an external carbon source. The removal rate of COD_Cr, was approximately 90% at all cases. The results of the study that a correlation between ORP (Oxidation- Reduction Potential), pH and DO and nitrification or denitrification when an external carbon source is added and when it isn`t was showed that ΔORP is suitable parameter. ORP reacted properly to denitrification (ΔORP < -10) and nitrification (ΔORP <0). The use of real-time control saved anywhere between 61 and 67 minutes at the anoxic(1) stage and 26 to 52 minutes at the oxic(1) stage. When the time saved from the anoxic(1) and oxic(1) was added to the anoxic(2) stage for the removal efficiency of TN and TP increased from 0.7 to 13.9% and 12 to 35 % respectively. |