Development of a Real-time Aeration Control Strategy for Low DO LevelBiological Nutrient Removal (BNR) Process Control of a Continuous-Flow Sequencing Batch Reactor

• Main Authors: Bo-Chao CHo, 卓伯全
• Other Authors: Shu-Liang Liaw
• Format: Others
• Language: zh-TW
• Published: 2003
• Online Access: http://ndltd.ncl.edu.tw/handle/57755463374894023376

博士 === 國立中央大學 === 環境工程研究所 === 92 === The purpose of this study is to develop a real-time aeration control method to control the aerobic bio-phosphorus uptake and ammonia nitrogen nitrification processes operated under low DO level conditions, to increase the comprehensive performance of Continuous-Flow Sequencing Batch Reactor (CFSBR). The study results showed the facultative organisms in CFSBR could be acclimated and controlled under low DO levels and low ORP states to perform the simultaneous bio-phosphorus uptake and ammonia nitrogen nitrification processes, and high comprehensive performance of CFSBR were obtained. The performance limiting factor of low DO level bio-phosphorus uptake and nitrification processes is the ORP state in anaerobic phases. Control the nitrified productions were coexistence of NO2 --N and NO3 --N, as well as low NO3 --N/NO3 --N ratios were presented, could increase the efficiency of the anoxic denitrification processes and eliminate the inhibition effects of bio-phosphorus release in the anaerobic phases, thus increase the performance of low level bio-phosphorus uptake and nitrification processes. The on-line measured information of the oxygen transfer ratios and the oxygen demand rates could characterize the microbial oxygen utilization behaviors in the low DO level bio-phosphorus uptake and ammonia nitrogen nitrification processes.Integrate the on-line measured information of the oxygen transfer ratios and the oxygen demand rates into the real-time aeration control method could increase the stability of process controls and the effectiveness of operations.