화학공학소재연구정보센터
Applied Chemistry, Vol.10, No.1, 369-372, May, 2006
SBR공정에서 유효미생물이 생물학
The Effect of Effective Microorganisms on Biological Nutrient Removal in SBR Process
The effects of EM addition into wastewater with low C/N ratio in SBR process on nitrogen and phosphorous removal efficiencies were investigated. The ratio of carbon to nitrogen sources(C/N ratio) is important to satisfy the water purification level in biological treatment processes. Due to low carbon contents in wastewater, the removal efficiency was decreased in biological nutrients removal process. Therefore, it is necessary to compensate carbon source to increase removal efficiency. The SBR were fed synthetic wastewater and operated on a cycle consisting of the following phases: 30min fill, 3hr anaerobic, 14hr aerobic, 4hr anoxic, 2hr settling, 30min draw. Nitrogen and phosphorus removal efficiency were about 98%, 92%, respectively in the EM-received reactor. The almost identical performance achieved with EM in comparison to activated sludge. Therefore, the efficient nutrients removal process can be established when EM and wastewater with low C/N ratio were simultaneously fed into SBR reactor.