Completed Projects & Case Studies

Converting Sewage Water to Drinking Water, Chennai, India

Overview
With groundwater levels hitting rock bottom and monsoon failing almost every alternative year, Chennai’s water woes was worsening every year. To tide over the impending crisis, Chennai Metropolitan Water Supply and Sewerage Board (CMWSSB) came with a proposal that assures regular supply of 260 MLD water for Industries. The plan is to recycle sewage into potable drinking water by setting up tertiary treatment plants, costing over `1,000 crore! 

Case study
On a pilot scale, Metro Water set up dedicated 10 MLD sewage treatment plants, followed by tertiary treatment plants at Nesapakkam and Perungudi. The treated water is to be pumped to the nearby lakes. Each plant is being designed and engineered without chemical additions and smart nitrogen removal control system following tertiary treatment plant, which consists of ozonation, sand filter, ultra filtration, activated carbon filter and ultraviolet systems.