Applying real-time control to enhance the performance of nitrogen removal in the continuous-flow SBR system

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题名:	Applying real-time control to enhance the performance of nitrogen removal in the continuous-flow SBR system
作者:	Yu,RF;Liaw,SL;Chang,CN;Cheng,WY
贡献者:	環境工程研究所
关键词:	WASTE-WATER;BATCH REACTOR;SLUDGE
日期:	1998
上传时间:	2010-06-29 18:21:16 (UTC+8)
出版者:	中央大學
摘要:	Conventional operations of wastewater treatment systems use the concepts of steady-state control, and often lead to unnecessary resource consumption for maintaining system functions. Real-time control was examined as a useful approach for improving the operation of wastewater treatment systems. This paper presents the application of real-time control to enhance the performance of nitrogen removal in a continuous-flow SBR system. A real-time control system combining on-line measurement of ORP and pH with Artificial Neural Network (ANN) model was proposed to carry out unsteady-state regulation of the hydraulic retention time of different operation phases. The result of this study shows that the performance of nitrogen removal was enhanced under real-time operation. Compared with fixed-time operation, the retention time of aerobic and anoxic phases can be reduced by approximately 45% and 15.5% in real-time operation respectively, also meaning that 45% aeration energy can be saved. The real-time operation also reveals a higher total nitrogen removal in a relative short retention time. Moreover, some dynamics and kinetics of nitrogen were investigated. These indicate the occurrence of nitrite-type nitrification under real-time operation. This nitrite-type nitrification results in the enhancement of denitrification performance with less carbon resource requirement and higher denitrification efficiency. (C) 1998 Published by Elsevier Science Ltd. All rights reserved.
關聯:	WATER SCIENCE AND TECHNOLOGY
显示于类别:	[環境工程研究所 ] 期刊論文

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