Smith P J, Vigneswaran S, Ngo H H, Nguyen H T, Ben-Aim R
University of Technology, Sydney, PO Box 123, Broadway, NSW 2007, Australia.
Water Sci Technol. 2006;53(4-5):179-84. doi: 10.2166/wst.2006.122.
The application of automation and supervisory control and data acquisition (SCADA) systems to municipal water and wastewater treatment plants is rapidly increasing. However, the application of these systems is less frequent in the research and development phases of emerging treatment technologies used in these industries. This study involved the implementation of automation and a SCADA system to the submerged membrane adsorption hybrid system for use in a semi-pilot scale research project. An incremental approach was used in the development of the automation and SCADA systems, leading to the development of two new control systems. The first system developed involved closed loop control of the backwash initiation, based upon a pressure increase, leading to productivity improvements as the backwash is only activated when required, not at a fixed time. This system resulted in a 40% reduction in the number of backwashes required and also enabled optimised operations under unsteady concentrations of wastewater. The second system developed involved closed loop control of the backwash duration, whereby the backwash was terminated when the pressure reached a steady state. This system resulted in a reduction of the duration of the backwash of up to 25% and enabled optimised operations as the foulant build-up within the reactor increased.
自动化以及监控与数据采集（SCADA）系统在市政供水和污水处理厂中的应用正在迅速增加。然而，在这些行业所采用的新兴处理技术的研发阶段，这些系统的应用却较少。本研究涉及在中试规模研究项目中，将自动化和SCADA系统应用于浸没式膜吸附混合系统。在自动化和SCADA系统的开发过程中采用了渐进式方法，从而开发出了两种新的控制系统。所开发的第一个系统涉及基于压力增加对反冲洗启动进行闭环控制，由于反冲洗仅在需要时而非固定时间启动，从而提高了生产效率。该系统使所需的反冲洗次数减少了40%，并且还能在废水浓度不稳定的情况下实现优化运行。所开发的第二个系统涉及对反冲洗持续时间进行闭环控制，即当压力达到稳定状态时终止反冲洗。该系统使反冲洗持续时间减少了多达25%，并且随着反应器内污垢的增加能够实现优化运行。
