噪声检测仪器论文英语的

帮你找了下 看看是不是你需要的Instrumentation, Control and Automation for full-scaleSequencing Batch Reactor PlantsH. Steinmetz * and J. Wiese **** Institute for Innovative Wastewater Technologies, University of Kaiserslautern, Paul-Ehrlich-Str. 14, 67663 Kaiserslautern, Germany (Email: )* Anlagen- und Sondermaschinen Automation (ASA) GmbH, Robert-Bosch-Str. 7, 32547 BadOeynhausen, Germany (Email: ) (formerly: *)Abstract The sequencing batch reactor (SBR) technology possesses a high process flexibilityand treatment efficiency. Unfortunately, up to now most SBR plants are still using fixed timebasedsequential control (TSC), which can not react flexibly. Therefore, this paper will focuson instrumentation, control and automation (ICA) for SBR plants, because with the help ofmodern supervisory control and data acquisition (SCADA) systems and dynamic RTC it ispossible to operate SBR plants much more Real-Time Control (RTC), SBR, Instrumentation, Control and AutomationIntroductionOne of the several types of WWT technologies commonly used in the world (. severalthousands), is the SBR technology, where all treatment processes take place in one singlereactor. In dependence of diurnal, weekly or seasonal variations in flow rate, load and sludgecharacteristics it is possible to vary the sequences of the steps and the duration of phases in acycle. This leads in principle to a high flexibility of the SBR technology. To exploit theadvantages of (dump filled) SBR technology like flexibility, high metabolic activity andgood sludge settling properties etc. SCADA systems and powerful programmable logiccontrollers (PLC) are required combined with flexible control in many cases the flexibility is not used because most of the SBR plants use fixed TSC.