Wastewater Treatment

Case Study
Ethernet networks are critical for modern-day freshwater and wastewater treatment plants. These large-scale facilities exhibit high degrees of automation. The technical processes in water treatment are optimized by means of continuous process control.

Depending on the plant type several stages of water treatment are needed: raking, micro-raking, sand trapping, pre-clarification, biological stages with aerated and non-aerated zones, basin clarification, and sludge treatment are frequently required. PLC control is programmed in a formal language from process control. This makes the programming understandable for the operator and the plant engineer.

Open and universal systems are becoming increasingly important across industrial automation engineering. The universal features refer to the networking, the process control engineering with PLC programming, and the service provider responsible for the construction of the plant. This makes it easier to construct and operate the plant at a higher level. PLC and substations demand network connectivity and high availability within process control systems.

Universal networking with Ethernet from the field bus level, to the circuit level, to the office/management level allows efficient controls of large-area plants within operating conditions and stringent requirements.

Water treatment requires filtration operation and pump regulation to be carefully controlled via automated machines. The entire network must process information simultaneously and update within microseconds. Advanced monitoring and control for trouble-free operation of the system is necessary as modernization increases.

It requires flow quantities regulated in real time without any risk of interruption. The accurate knowledge and experience needed in order to design “just-right” network architectures and provide hardware that can facilitate effective processes is essential to these critical systems.