Dynamically multi-objective optimization with state observer for wastewater treatment process

IF 9.7 1区 环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL
Qianqian Cai, Xiaopei Chen, Haoqiang Ou, Damian Marelli, Wei Meng
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引用次数: 0

Abstract

Wastewater treatment plays an important role in alleviating the water shortage and protecting the environment from contamination. Since the wastewater treatment process (WWTP) is a time-varying and highly complex system, it is challenging to design an effective optimization control method to ensure effluent quality (EQ) and reduce energy consumption (EC). To overcome this problem, a dynamically multi-objective optimal control strategy is proposed in this paper. Firstly, a multi-objective gray wolves optimization algorithm based on subpopulation and multi-strategy exploration (MOGWO-SM) is designed to obtain dynamic setpoints that can achieve the tradeoff between EC and EQ. Then, multi-unit nonsingular fast terminal sliding mode controllers based on extended state observer (MNFTSMC-ESO) are used to accurately track these setpoints to keep the dissolved oxygen and nitrate maintained at appropriate concentrations throughout the WWTP. Finally, the effectiveness of the proposed method is verified using the Benchmark Simulation Model No. 1 (BSM1). Simulation results show that the proposed method not only has satisfactory control accuracy, but also can ensure that the effluent quality meets the discharge requirements with a significant reduction in EC. EC values are decreased by 10.14% and 21.69% compared with traditional PID strategy in dry and storm conditions, respectively. Overall, the proposed method has a certain potential for practical application due to its superior performance, contributing to sustainable wastewater management.
利用状态观测器对废水处理工艺进行动态多目标优化
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来源期刊
Journal of Cleaner Production
Journal of Cleaner Production 环境科学-工程:环境
CiteScore
20.40
自引率
9.00%
发文量
4720
审稿时长
111 days
期刊介绍: The Journal of Cleaner Production is an international, transdisciplinary journal that addresses and discusses theoretical and practical Cleaner Production, Environmental, and Sustainability issues. It aims to help societies become more sustainable by focusing on the concept of 'Cleaner Production', which aims at preventing waste production and increasing efficiencies in energy, water, resources, and human capital use. The journal serves as a platform for corporations, governments, education institutions, regions, and societies to engage in discussions and research related to Cleaner Production, environmental, and sustainability practices.
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