Namami Gange Uses Varied Technologies for Sewage Treatment

Cities and towns produce wastewater every day from homes and businesses. As urban areas grow, more sewage needs to be collected, carried and treated. Much of this sewage in India still goes untreated and ends up in rivers, causing pollution and disease. Rivers like the Ganga have faced this problem for decades. Earlier efforts such as the Ganga Action Plan tried to build treatment plants but could not keep up with the growing sewage load. Sewage treatment uses three stages: primary (physical) treatment, secondary (biological) treatment, and tertiary (advanced) treatment. Microbes play a central role in the biological stage. In 2014, the government launched the Namami Gange Programme (NGP) as an Integrated Conservation Mission. The programme has two main goals: pollution abatement and conservation and rejuvenation of the river Ganga. Industrial effluent and untreated sewage remain major sources of river pollution. A 2024 Mains question on this theme asked about mitigation measures and government initiatives. The NGP's sewage infrastructure work directly answers this question. A common response to such pollution has been building more treatment plants. However, a fixed design does not work everywhere. A large city, a hill town, and a land-starved pilgrimage site all need different solutions. This is why a flexible, multi-technology strategy matters more than one single fix.