C&D waste recycling and reuse: Promoting environmental sustainability in India

The construction industry is a cornerstone of economic development and urbanization, but it also generates a significant amount of waste. Construction and demolition (C&D) waste, including concrete, wood, metals, asphalt and gypsum, poses a substantial environmental challenge. For companies like Sattva Group, which are committed to sustainable development, the effective recycling and reuse of C&D waste present an opportunity to enhance environmental sustainability while also deriving economic benefits.

The environmental impact of C&D waste

C&D waste accounts for a large proportion of global waste generation. In many countries, it comprises up to 30-40% of total waste. If not properly managed, this waste ends up in landfills, contributing to soil and water contamination, increased greenhouse gas emissions and the depletion of landfill space. Additionally, the extraction and processing of raw construction materials deplete natural resources and cause habitat destruction.

Recycling and reusing C&D waste offer substantial environmental and economic benefits. The process also requires less energy compared to producing new materials from virgin resources. Additionally, effective recycling and reuse strategies decrease the volume of waste sent to landfills, alleviating the pressure on these facilities and reducing potential environmental hazards associated with landfill sites.

Benefits of Recycling and Reuse

Resource conservation: Recycling materials like concrete, bricks and metals reduces the demand for new raw materials. For example, recycling concrete can save significant amounts of natural resources.

Energy savings: Recycling processes consume less energy compared to manufacturing new materials. For instance, recycling steel uses about 60% less energy than producing it from ore.

Emission reduction: Recycling can significantly reduce CO2 emissions. For example, recycling one ton of concrete can save approximately 1,900 kg of CO2 emissions.

Economic growth: The recycling industry can create jobs and contribute to economic growth. In India, the recycling sector is projected to generate substantial employment opportunities.

Challenges and solutions

Many stakeholders are not aware of the benefits of recycling, highlighting the need for education and awareness campaigns to drive change. Additionally, India lacks sufficient recycling facilities, making investment in infrastructure and technology essential. While there are existing policies, weak enforcement hampers progress, so strengthening regulations and ensuring compliance is crucial to enhancing recycling efforts. Furthermore, the market demand for recycled materials is limited; promoting the use of recycled products through certifications and quality standards can stimulate demand and support the recycling industry.

Government initiatives and policies

The Construction and Demolition Waste Management Rules, 2016, mandate the segregation of C&D waste at the source, along with proper collection and recycling. Urban local bodies are required to establish waste processing facilities and promote the use of recycled products in construction activities. The Swachh Bharat Mission emphasizes sustainable waste management practices, including the recycling of C&D waste, with the aim of creating a clean and green India through waste segregation and recycling initiatives. The Smart Cities Mission encourages the adoption of sustainable waste management practices in 100 selected cities, including the establishment of C&D waste recycling plants and the use of recycled materials in urban infrastructure projects.

Conclusion

Recycling and reusing construction and demolition waste is crucial for promoting environmental sustainability in India. It conserves resources, saves energy, reduces greenhouse gas emissions and offers economic benefits. Despite significant challenges, India is making strides toward improving its waste management practices. Addressing these challenges through policy interventions, technological advancements and market development is essential. As urbanization continues, the importance of sustainable C&D waste management cannot be overstated.

P K Mishra,
VP – Planning & Procurement, Sattva Group