| Title |
Review of 3 - year Experimental Data from Treatment Wetland for Water Quality Improvement in Rural Area |
| Authors |
윤춘경(C . G . Yoon),권순국(S . K . Kwun),우선호(S . H . Woo),권태영(T . Y . Kwon) |
| Abstract |
Sewage treatment study was performed for three years by constructed wetland experimental system at Konkuk University. The system was a subsurface flow type, and consisted of 60㎝ depth of sand and reeds. It worked continuously including winter time, and the sewage flowed without freezing even when average daily air temperature was below -10℃. Average removal rates of BOD, COD, and SS were in the range of 60∼71%, T-P removal rate was about 50%, and T-N removal rate was 24.3%. The reason for poor T-N removal might be due to high influent concentration and shorter retention times. The effluent of the wetland system often exceeded effluent water quality standards for sewage treatment plant, therefore, further treatment could be required if the effluent needs be discharged to the public water. Wetland system involves relatively large land area and could be suitable for rural area rather than urban area. Therefore, utilization of sewage for agricultural purpose or subsequent land treatment is recommended as a ultimate disposal depending on site specific environmental conditions. |