Finding the Optimal Aeration Profiles and DO Profiles in a Plug-flow Biological Wastewater Treatment Reactor with A Theoretical Approach

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• 作者：Xiaoxin. Liu^* ; ^** ; ^{liuxiaoxin0408@163.com" class="auth_mail" title="E-mail the corresponding author} ; Yuanwei. Jing^* ; ^{ywjjing@mail.neu.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Gustaf Olsson^*** ; ^{gustaf.olsson@iea.lth.se" class="auth_mail" title="E-mail the corresponding author} ; Zhiguo. Yuan^** ; ^{z.yuan@awmc.uq.edu.au" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Aeration ; Biological wastewater treatment ; Control ; Maximum Principle ; Optimal ; Plug-flow ; Simulation benchmark ; Two-point boundary-value problem
• 刊名：IFAC-PapersOnLine
• 出版年：2014
• 出版时间：2014
• 年：2014
• 卷：47
• 期：3
• 页码：2715-2720
• 全文大小：389 K

文摘

It is a common principle that aeration to a wastewater treatment reactor performing aerobic carbon and ammonium oxidation should be minimised while satisfactory carbon and ammonium removal is achieved. The implementation of this principle in a plug-flow like aerobic reactor has so far been in an ad-hoc manner in the absence of a theoretically optimal dissolved oxygen (DO) profile. In this study, the Pontryagin Maximum Principle is applied to derive the theoretically optimal DO profile along a plug-flow aerobic reactor. While it is difficult to implement this optimisation algorithm online in practice due to the requirement of detailed wastewater composition and model parameter information, the optimal aeration profiles revealed under various conditions provide guidance to the design and operation of aeration systems. The optimal K_La and DO profiles can be applied in benchmark model to not only achieve satisfactory effluent requirements but also aeration energy is saved.