Kumar-MEPL JV has celebrated the first breakthrough of its 3.85m diameter Terratec Rock Slurry TBM on the Mumbai Sewer Disposal Project (MSDP) Stage-II – PST1. This breakthrough marks a crucial step in enhancing Mumbai’s sewage infrastructure, a project overseen by the Brihanmumbai Municipal Corporation (BMC). The project involves constructing two priority sewer tunnels (PST-1 & PST-2) to improve wastewater collection, treatment, and disposal processes, ultimately reducing environmental impact.
Terratec has supplied two TBMs for the project: a 3.85m diameter Rock Slurry TBM for the 5.8km PST-1 and a 3.14m diameter Rock EBPM for the 4.7km PST-2. The Rock Slurry TBM, the smallest of its kind in India, has demonstrated impressive excavation rates, achieving up to 18 rings per day in fresh rock.
The project aims to connect Don Bosco Junction in Borivali West to the Malad Waste Water Treatment Facility (WWTF) and the Oshiwara Bus Depot to the Malad Pumping Station, respectively. This will reduce wastewater flow into existing collector sewers and decommission outdated pumping stations, ultimately improving the quality and reliability of wastewater management.
Terratec Rock Slurry TBM employs a 5+1 universal type segment design, featuring reinforced concrete segments that are 200mm thick and 1200mm wide. To efficiently manage slurry removal and treatment, the Terratec Slurry Transportation System and Slurry Treatment Plant are utilized.
On the other drive, on July 20th, S116, a 3.14m Rock EPBM was lowered into Malad Pumping Station’s launch shaft (Shaft 08). Along with another TBM S80, it’s the smallest diameter EPBM to be deployed in India.
The MSDP – Stage II Priority Works project includes a sewer tunnel along Link Road, connecting Don Bosco Junction to the existing Malad Pumping Station. Another branch sewer tunnel connects from the Gorai Pumping Station, and a tunnel runs from the existing Malad Pumping Station to the proposed Malad IPS at Malad WwTF. This project involves constructing shafts and upstream connections to reduce wastewater flow into existing collector sewers and decommission pumping stations.
The comprehensive project involves constructing new pumping stations, expanding sewage collection networks, establishing wastewater treatment facilities, and implementing treated effluent disposal systems. These treatment plants are projected to recycle an impressive 2,464M litres of sewage per day, significantly reducing water pollution and rejuvenating Mumbai’s Mithi and Oshiwara rivers.
Terratec
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