Mumbai: Suez cleans the sewage of Colaba

The town of Mumbai has assigned the Suez, a design-built contract for the wastewater treatment plant of Colaba. The contract with a duration of 3 years and an amount of 42 M€, will be followed-up by 15 years of operating.

With more than 15 million of the inhabitants, Mumbai is facing an ongoing growth of population. In this context, the agglomeration launched the Phase 2 of an extensive program of development of its sewage facilities (1 500 km of network to date) who will be able to take account of the increasing wastewater volumes by 2025.

The project involves the renovation of an existing treatment facilities and the construction of new seven stations in the districts of Mumbai, including the one in Colaba with a capacity of 37,000 m3 /day. Other stations will be built in the districts of Worli, Bandra, Versova, Malad, Ghatkopar and Bhandup.

The facility in Colaba will be equipped with a tertiary treatment by disc filtration and chlorination enabling the re-use of wastewater and should incorporate the Degremont Azur Air C4 technology which will eliminate odors.