Tränckner J, Franz T, Seggelke K, Krebs P
Institute for Urban Water Management, Technische Universität Dresden, Dresden, Germany.
Water Sci Technol. 2007;56(10):11-8. doi: 10.2166/wst.2007.740.
A prerequisite for an integrated control of sewer and wastewater treatment plant (WWTP) is a capacity driven inflow control to WWTP. This requires reliable information about the current status of WWTP operation and its behaviour on varying hydraulic, COD and nutrient loads. So far most of the proposed control strategies are based on hypothetical modelling studies. In this paper the behaviour of three large WWTPs on increased storm water loads is analysed based on online measurements of several years. In all cases the main limiting factors for an increase of load were the sedimentation processes in the secondary clarifier and the nitrification capacity. In one case study predictive control strategies have been developed observing these processes which are backboned by effluent control. Tests using an integrated model of sewer and WWTP demonstrate that inflow control on emission load varies significantly with rain intensity.
对下水道和污水处理厂（WWTP）进行综合控制的一个前提条件是对污水处理厂进行流量驱动的进水控制。这需要有关污水处理厂运行现状及其在不同水力、化学需氧量（COD）和营养负荷下行为的可靠信息。到目前为止，大多数提出的控制策略都是基于假设性的建模研究。本文基于数年的在线测量数据，分析了三个大型污水处理厂在雨水负荷增加时的行为。在所有情况下，负荷增加的主要限制因素是二次沉淀池中的沉淀过程和硝化能力。在一个案例研究中，已开发出观察这些过程的预测控制策略，这些策略以出水控制为支撑。使用下水道和污水处理厂综合模型进行的测试表明，基于排放负荷的进水控制会随降雨强度而显著变化。
