모델링기법을 이용한 A2O하수처리공정에서 주요 공정관리에 관한 연구

• Published in: 한국수처리학회지, 33(3) pp. 133 - 140
• Main Author: 김지연
• Format: Journal Article
• Language: English; Korean
• Published: 한국수처리학회 30.06.2025
• Subjects: 토목공학
• DOI: 10.17640/KSWST.2025.33.3.133
• ISSN: 1225-7192

Despite the extensive data collection facilitated by water quality sensors in wastewater treatment plants (WWTPs), certain parameters such as chemical oxygen demand (COD), total nitrogen (TN), and total phosphorus (TP) still require analysis through time-consuming experimentation. Moreover, the complex interactions between biological and physicochemical treatment processes, coupled with fluctuations in influent quality and quantity, lead to significant variations in operational conditions and treatment efficiencies in WWTPs, presenting challenges for monitoring, operation, and maintenance. Consequently, conventional modeling methodologies may prove insufficient for practical operational environments. This study developed novel ensemble tree-based models to enhance real-time predictions of COD and TN concentrations, which are difficult to monitor directly. In addition, a novel approach was proposed to assess anaerobic-anoxic-oxic (A2O) process performance by analyzing the correlation between the predicted carbon/nitrogen (C/N) ratio and the removal efficiencies of COD and TN. During a one and a half year monitoring period, the predicted C/N ratio accurately reflected changes in COD and TN removal efficiencies across the different A2O bioreactors. The results provide real-time COD and TN predictions and a method for assessing A2O process performance based on the C/N ratio, which can significantly aid in the operation and maintenance of biological wastewater treatment processes. KCI Citation Count: 0