Sewage recycling for non-potable applications helps to conserve water. Increasingly, wastewater recycle and reuse is being sought as a solution to augment limited freshwater supplies.
Circle H2O is currently working on a project for a private developer in Pune, India to incorporate sewage recycling into their water conservation strategy. The private development includes a mixture of residential and commercial high-rise buildings, and is currently undergoing expansion. With water scarcity in the region, the amount of freshwater available for those living and working in the development is limited.
Circle H2O recommended membrane bioreactor (MBR) treatment technology due to the footprint advantages of MBR and greater quality treated water. In the same amount of space an MBR can treat three times the flow of a conventional sewage treatment plant. And due to the greater treated water quality of MBR compared to conventional sewage treatment, the treated water will be suitable for non-potable reuse applications. The MBR capacity of 7.5 million liters per day (MLD) is expected to be commissioned in May 2021, and will help conserve the limited freshwater resources available in this community. The developer plans to reuse the treated sewage for toilet flushing, cooling tower makeup water, and irrigation.
The success of this approach to sewage treatment and water conservation has led the developer to consider sewage recycling via MBR at other future developments that are currently in the planning phases.
