The study of DO control in a continuous-flow sequencing batch reactor

• Main Authors: Chiou Bo-Ren, 邱柏仁
• Other Authors: 廖述良
• Format: Others
• Language: zh-TW
• Published: 2001
• Online Access: http://ndltd.ncl.edu.tw/handle/99228655346096884559

碩士 === 國立中央大學 === 環境工程研究所 === 89 === As a simple and compact wastewater treatment system, the continuous-flow sequencing batch reactor (continuous-flow SBR) is capable of removing the oxygen-demanding carbonaceous materials, nitrogen and phosphorus biological nutrients by cycling with anaerobic, aerobic, anoxic, settling and discharge phases. Since the ORP and pH have been recognized as more flexible and efficient monitoring and control parameters on biological and chemical treatment processes, particularly applied to the biological nutrient removal processes. The ORP and pH real-time control strategies of aerobic nitrification and anoxic denitrification phases had well developed for automation of continuous-flow SBR. However, continuous-flow SBR is usually controlled with fix-aeration approach, which is difficult to adjust the required DO conditions to influent loading variations and organisms activity, and always led to consume tremendous energy and resources for meeting the effluent standard. For achieving an objective of automation, the purpose of this study is to develop a DO real-time control strategy to increase operational performances and decrease the energy consumption. The study results revealed that the developed DO real-time control approach could increase the operational stability and efficiency. The COD, ammonia and phosphorus removal rate could maintain above 93%, and decrease about 10 ~ 40 % aeration requirements compared with conventional aeration approaches.