Assessment of the geotechnical and environmental reuse potential of soil-like material recovered from Anantapur dumpsite, South India

Revitalizing landfills containing long-standing garbage in an environmentally responsible manner is a significant challenge for developing countries, especially urban local authorities in India. This study evaluates the feasibility of using soil-like material (SLM) recovered from the Anantapur dumpsite in South India. The SLM, with particle sizes under 4.75 mm, is examined for potential applications such as fill material for embankments, filling low-lying areas, addressing deep pits, and as compost for horticulture and agriculture. Initial tests on the SLM revealed that it constitutes about 70% of the total excavated waste, with organic content ranging from 14 to 16%. However, the presence of yellowish water leachate, soluble salts, and heavy metals indicates that treatment is necessary before off-site reuse. Specific design measures are required to mitigate risks when using SLM as earth-fill. Due to its high concentration of heavy metals, the reuse of SLM as compost may be restricted to non-agricultural applications and reclamation of barren land. However, with the addition of required nutrients, SLM could potentially be used for non-edible crops and nurseries, expanding its utility while ensuring environmental safety.