Sydney Water is tackling the frequent problems of blockages and overflows in its wastewater infrastructure through a $15 million Internet of Things (IoT) project. By deploying sensors that can detect blockages before they cause damage, Sydney Water is already saving hundreds of thousands of dollars per month.

This ambitious project aims to install over 26,000 blockage detection devices across 4,600km of wastewater infrastructure by June 2024, making it the largest initiative of its kind in Australia. As of October 2023, 15,000 devices have already been installed, covering 70% of the wastewater network that contributes to overflows into waterways. On average, these sensors detect about 20 blockages per month in the gravity wastewater network, resulting in approximately $400,000 in cost savings for incident management.

The devices, provided by project partners Kallipr and Metasphere, consist of data loggers connected to sensors that regularly communicate data readings. They are installed on existing sewer infrastructure and transmit data that triggers an alarm when certain thresholds indicate a potential blockage.

By detecting blockages in wastewater pipes before they lead to discharges into customer properties and the environment, this system helps prevent public health risks, costly clean-ups, and reputational damage.

Craig Earl, the Head of Operational Technology at Sydney Water, expressed enthusiasm for this multimillion-dollar initiative, emphasizing its transformative nature. He highlighted Sydney Water's leadership in deploying internet-connected devices through the Internet of Things, driving significant savings by detecting blockages early in the wastewater network.

The majority of blockages are caused by tree roots, grease, and wet wipes. Over the past 18 months, more than 11,000 sensing devices have been installed, with ongoing deployment at a rate of 200-300 devices per week. These sensors are designed to withstand high humidity and water immersion, and their battery life exceeds five years, reducing the need for maintenance and site visits. They can reliably and securely record and transmit data from remote and difficult-to-access areas using the NB-IoT network.

Christoph Prackwieser, Sydney Water's Internet of Things Manager, emphasized the considerable cost savings achieved through the use of these sensors. The technology has identified and cleared around 500 blockages at environmentally sensitive sites, resulting in monthly cost avoidance of $400,000.

The success of this IoT project has driven wastewater network digitization, facilitating proactive management of blockage events. Sydney Water strategically places the sensors to maximize environmental protection, particularly around creeks, streams, and Sydney Harbour.

The installation of these devices enables Sydney Water to expand its wastewater management project, further digitizing the existing wastewater networks and enabling proactive blockage management.

Craig Earl, proud to be part of this initiative, shares his excitement and findings with his family, highlighting the positive impact being made on the city.