Flushing is a simple solution used for centuries to maintain effective drainage systems. Pioneered during Roman times and widely used throughout towns and cities by the Victorian’s. But unfortunately a technique that has been forgotten and replaced in modern times.
Replacement systems to keep networks clean involve on-going maintenance commitments, such as pressurized water jetting units that have only a limited affect, spatially and temporarily. The current operational responses to networks, exhibiting low tractive force (grade), sediment and Fats, Oil and Grease (FOG), amongst others is to derive a repetitive cleansing programme or use potable water flushing tank installations. Several water companies have now tended to replace these with targeted problem solving and blockage removal efforts, that help to minimise operation expenditure but can lead to a widespread network deterioration over time.
The paper will show how one low cost technological solution has helped UK Water companies to optimise the value of their operational efforts, introducing efficiency to the wastewater network and reducing on-going maintenance expenditure. The technology also avoids the need to incorporate the use of precious potable water resources, using the wastewater itself to cleanse the network.
The paper will present examples of installations across several Water Companies in the UK, showing the outcomes that have helped remove sediment, prevent FOG build up maintaining the drain in a free flowing effective condition. The technology has great potential for helping wastewater networks perform across New Zealand.