DOI: 10.3390/su12030768
论文题名: Wastewater treatment plant operation: Simple control schemes with a holistic perspective
作者: Revollar S. ; Vilanova R. ; Vega P. ; Francisco M. ; Meneses M.
刊名: Sustainability (Switzerland)
ISSN: 20711050
出版年: 2020
卷: 12, 期: 3 语种: 英语
英文关键词: Environmental costs
; Hierarchical control strategies
; PID control
; Plantwide control
; Wastewater treatment plants
英文摘要: In this paper, a control approach for improving the overall efficiency of a wastewater treatment plant (WWTP) is presented. It consists of a cascaded control system that uses a global performance indicator as the controlled variable to drive the plant to operating conditions that satisfies trade-offs involved in the WWTP operation, improving the global performance of the plant. The selected global performance indicator is the N/E index that measures the ratio between the amount of nitrogenated compounds eliminated (kgN) and the energy (kWh) required to achieve that goal. This index links the variables of the activated sludge process with the energy consumed in the whole plant, thus the control strategy takes actions based on plantwide considerations. An external Proportional Integral (PI) controller changes the DO set point according to the N/E index and the basic dissolved oxygen (DO) control scheme in the activated sludge process follows this reference changes varying the aeration intensity. An outer loop with an event-based controller is used to compute the index values when the DO concentration is driven to excessively low limits, preventing long operation periods in this undesirable condition. Simple proportional integral controllers (PI) are used to adapt the strategy to the automation systems available in WWTPs. The implementation in the Benchmark Simulation Model 2 (BSM2) demonstrates the potential of the proposed approach. The results show the possibilities of the N/E index to be used as an indicator of global performance of WWTPs. It provides a link between water line objectives and energy consumption in the whole plant that can be exploited to introduce plantwide considerations in alternative control strategies formulated to drive the plant to operating conditions that optimize the overall process efficiency. © 2020 by the authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/159828
Appears in Collections: 气候变化与战略
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作者单位: Informatics and Automatics Department, University of Salamanca, Salamanca, 37008, Spain; Dept. Telecommunications and Systems Engineering, School of Engineering Universitat Autonoma Barcelona, Barcelona, 08193, Spain
Recommended Citation:
Revollar S.,Vilanova R.,Vega P.,et al. Wastewater treatment plant operation: Simple control schemes with a holistic perspective[J]. Sustainability (Switzerland),2020-01-01,12(3)