Clean water for Mexico City

The largest wastewater treatment plant in the world for Mexico City was built in the Mexican city of Atotonilco.

The plant treats around 60 percent of the wastewater of 20 million inhabitants of the state capital.

The wastewater treatment plant is consistently designed for safety and consists of two redundantly configured clarifying strands that run in parallel during normal operation. The same redundancy is found in the PLC hardware for the mechanical pre-treatment, so the system can continue to operate even if technical problems arise.

We planned and configured the 16 control cabinet fields that are needed for this using EPLAN Electric P8. The plant is divided into three area substations, each of which we have clearly displayed on a touch panel.

An integrated motor management connects the higher-level automation system and the motor feeder. In this way, the operator always has an overview of the current operating status of the drives. The corrosion-resistant construction protects the control hardware against aggressive substances.