The NITI Aayog report, Scenarios Towards Viksit Bharat and Net Zero - Sectoral Insights: Waste mentions that the waste sector, though accounting for 2.56% of India’s total emissions, is a critical lever for climate action due to its high methane intensity. Wastewater treatment currently contributes 74% of waste-sector emissions, reflecting significant gaps in sewer coverage and treatment capacity. Under the transformative Net Zero Scenario (NZS), sectoral emissions are projected to fall by 95.9% compared to a business-as-usual path, reaching just 10.9 MtCO2e by 2070. This transition relies on a massive shift toward circular economy principles, universal waste collection, and 100% methane recovery in both domestic and industrial wastewater systems.
Strategic Pillars for a Low-Carbon and Circular Waste Ecosystem
The roadmap identifies foundational pillars to turn waste into a resource while eliminating greenhouse gas leaks:
Universal Methane Recovery: Achieving 100% methane recovery by 2040 in industrial wastewater and prioritizing anaerobic treatment with energy recovery for domestic sewage.
Decentralized Circularity: Scaling biodegradable waste processing through bio-methanation and Bio-CNG, while capping per capita waste generation at 0.622 kg/day by 2040.
Comprehensive Wastewater Reuse: Expanding sewer networks to 85% and promoting the reuse of treated wastewater in agriculture and construction to reduce freshwater pressure.
Remediation of Legacy Waste: Prioritizing the scientific closure of open dumpsites and the development of sanitary landfills to prevent long-term methane seepage.
Advanced Monitoring and IoT: Deploying a unified national data framework using IoT-based sensors for real-time waste tracking and transparent reporting.
What is the difference between “Aerobic” and “Anaerobic” wastewater treatment in the context of emissions? Aerobic treatment involves the use of oxygen to break down organic matter, primarily producing CO2, which has a lower global warming potential than methane. Anaerobic treatment, however, occurs in the absence of oxygen and produces methane (CH4), which is over 25 times more potent than CO2 as a greenhouse gas. While anaerobic systems are more energy-efficient and allow for biogas recovery, they require strictly managed methane capture systems to prevent leakages; if unmanaged, they become the primary source of emissions in the waste sector.
Policy Relevance
The NITI Aayog findings represent a transition from waste disposal to a “Waste-to-Wealth” circular economy model. By institutionalizing the Net Zero Scenario, the Ministry of Jal Shakti and MoHUA are providing a roadmap to achieve universal sanitation and waste processing, essential for the “Viksit Bharat” vision of a clean and sustainable nation.
Scaling Urban Sustainability: Integrating methane recovery into the Swachh Bharat Mission (Urban) 2.0 can turn sewage treatment plants into “energy hubs,” reducing the operational costs of urban local bodies.
Reducing National Methane Footprint: As a signatory to various global climate discussions, achieving a 95.9% reduction in waste emissions positions India as a leader in non-CO2 greenhouse gas mitigation.
Bolstering Rural Livelihoods: Promoting Bio-CNG from agricultural and biodegradable waste provides a “Circular Economy” opportunity for rural entrepreneurs, aligning with the GOBAR-dhan initiative.
Incentivizing Private Participation: The move toward “participatory budgeting” and sustainable procurement creates a predictable market for private firms investing in advanced waste-to-energy and recycling technologies.
Follow the full report here: NITI Aayog: Scenarios Towards Viksit Bharat and Net Zero - Waste
