Juan-García Pau, Kiser Mehlika A, Schraa Oliver, Rieger Leiv, Corominas Lluís
Atkins, (The Hub) 500 Park Avenue, Aztec West, Almondsbury, Bristol, BS32 4RZ, UK; Catalan Institute for Water Research (ICRA), Scientific and Technological Park of the University of Girona, Emili Grahit 101, Girona 17003, Spain E-mail:
Catalan Institute for Water Research (ICRA), Scientific and Technological Park of the University of Girona, Emili Grahit 101, Girona 17003, Spain E-mail:
Water Sci Technol. 2018 Oct;78(5-6):1104-1114. doi: 10.2166/wst.2018.356.
This paper introduces the application of a fully dynamic air distribution model integrated with a biokinetic process model and a detailed process control model. By using a fully dynamic air distribution model, it is possible to understand the relationships between aeration equipment, control algorithms, process performance, and energy consumption, thus leading to a significantly more realistic prediction of water resource recovery facility (WRRF) performance. Consequently, this leads to an improved design of aeration control strategies and equipment. A model-based audit has been performed for the Girona WRRF with the goal of providing a more objective evaluation of energy reduction strategies. Currently, the Girona plant uses dissolved oxygen control and has been manually optimised for energy consumption. Results from a detailed integrated model show that the implementation of an ammonia-based aeration controller, a redistribution of the diffusers, and the installation of a smaller blower lead to energy savings between 12 and 21%, depending on wastewater temperature. The model supported the development of control strategies that counter the effects of current equipment limitations, such as tapered diffuser distribution, or over-sized blowers. The latter causes an intermittent aeration pattern with blowers switching on and off, increasing wear of the equipment.
本文介绍了一种集成生物动力学过程模型和详细过程控制模型的全动态空气分布模型的应用。通过使用全动态空气分布模型，可以了解曝气设备、控制算法、工艺性能和能源消耗之间的关系，从而对水资源回收设施（WRRF）的性能进行显著更现实的预测。因此，这导致曝气控制策略和设备的设计得到改进。已对赫罗纳WRRF进行了基于模型的审核，目的是对节能策略进行更客观的评估。目前，赫罗纳工厂采用溶解氧控制，并已针对能源消耗进行了人工优化。详细集成模型的结果表明，实施基于氨的曝气控制器、重新分布扩散器以及安装较小的鼓风机可节省12%至21%的能源，具体取决于废水温度。该模型支持了控制策略的开发，这些策略可应对当前设备限制的影响，如锥形扩散器分布或过大的鼓风机。后者会导致鼓风机间歇性地开启和关闭，从而增加设备的磨损。
