Kinetic Analysis of Continue-flow Sequencing Batch Reactor

• Main Authors: kao, Chi-Ying, 高綺霙
• Other Authors: Shu-Liang Laiw
• Format: Others
• Language: zh-TW
• Published: 1997
• Online Access: http://ndltd.ncl.edu.tw/handle/40385316271807102973

碩士 === 國立中央大學 === 環境工程學系 === 85 === AbstractIn biological wastewater treatment systems, the removal efficiency of organic pollutants is depended on the operational parameters and conditions, and is correlatedwith the species of microorganism and its activities. Therefore, it is required to maintain the species and its activities in processes control of biological wastewater treatment systems.In continue-flow sequencing batch reactor (CF-SBR) system, the main difference between the fixed-time and the real-time control is the foremost set the operation phase time in fixation to make sure the nitrification and denitrification are completed, thehindmost are real-time adjusts the cyclic duration to meet a time of treatment needs by on-line monitoring process parameters (pH, oxidation reduction potential and dissolved oxygen), it made the processes more flexible than the foremost. As mentioned above, base on the different character of two control strateges, the experiments of CF SBR using the real-time control show that the aerobic and anaerobic duration are shorter than fixed-time control in general. In order to know the effect of CF SBR system under the real-time control operation, this research measures the oxygen uptake rate in batch-tests to identify the activities of nitrosomonas and nitrobacter, and determine kinetics parameters of nitrification, includes maximum substrate removal rate, half-saturation coefficient and inhibit constant. It also measures the specific nitrate and nitrite utilization rates of denitrification with different COD: N ratio in batch-tests for investigation the kinetic of ammonia removal.The results of experiments shown that 1. nitrification kinetic parameters of fixed-time control strategy are r0,m=27.6 mg O2/g-hr, Kn=1.12 mg/l, Ki=4.92 mg/l for nitrosomonas and r0,m=9.0 mg O2/g-hr, Kn=0.7 mg/l, Ki=49.4 mg/l for nitrobacter. Nitrification kinetic parameters of real-time control strategy are r0,m=27.7 mg O2/g- hr, Kn=1.13 mg/l, Ki=5.91 mg/l for nitrosomonas and r0,m=7.9 mg O2/g-hr, Kn=0.84 mg/l, Ki=54.97 mg/l for nitrobacter, the kinetic parameters of both fixed and real-time control are similar. 2. both control strategies makes the same denitrofication rate in the same COD:N ratio. Otherwise, the aerobic duration measurement for real-time control is only about 3/4 of fixed-time control per day. These results indicate that using the real-time control not only can enhance the operation efficient of CF SBR system but can also maintain the same kinetic quality as using the fixed-time control.