|
DOI : , Vol.11, No.2, 53 ~ 62, 2003
|
| Title |
| Effect of Recycle water input in Endogeneous Denitrification Tank on the Removal efficiency of Nutrient in DNR process |
| 이병헌 Byung Hun Lee , 송원철 Won Chul Song , 황은주 Eun Jo Hwang , 이민규 Min Gyu Lee , 김중균 Joong Kyun Kim |
|
|
|
| Abstract |
| DNR process was developed for the N, P removal of the low organic materials concentration wastewater like domestic circumstances. This study was conducted to improve the removal rate of N, P and endogenous denitrification rate by inflowing the recycle water of wastewater treatment plant to sludge denitrifier. It defends the inhibition of phosphorus release from anaerobic reactor. To investigate effects of nitrogen removal in inflowing the recycle water of Modified DNR, the process is accomplished by three steps. First, compared the removal rate between DNR and Modified DNR in utilizing methanol as external carbon. Second, grasped whether use the recycle water as external carbon or not. And third, studied the removal effects of N, P in inflowing the recycle water to sludge denitrifier. At that result, Modified DNR were higher about 78%, 74% in the removal rate of N,P than DNR 70%. 60%. As inflowing the recycle water to sludge denitrifier, the nitrogen removal rate was 70.4% in spite of the low C/N ratio. It was similar to DNR removal rate. It was estimated that Modified DNR process show the better treatment effects than DNR in the low concentration wastewater treatment, it should be recognized that this process is suitable for DNR improvement. |
|
|
| Key Words |
| DNR process, nutient removal, recycle water |
|
|
|
|
|
PDF