Biomining of Dump-Sites

India requires an estimated area of 1690 for building up new landfills in entire country. Rapid Urbanization and shrinking land parcels availability has forced city authorities at present to explore implementation of bio-mining solutions.

These “Bio mining” is a very simple, low-tech, low-cost, quick and eco-friendly method of remediating old open waste dumps to permanently achieve near-zero emission of landfill gases and leachate. Bio-mining services involve excavation of legacy waste, its remediation using microbial inoculum mediated rapid stabilization and screening through electro- mechanical means into stabilized organics, recyclable and other inert fractions. A typicalbio-mining activity flow diagram is provided below for understanding.

Benefits of Biomining

Recovered materials such as ferrous metals, plastic, aluminium, and glass can be sold if markets exist for these materials.

Reclaimed soil can be used on site as daily cover material on other landfill cells, thus avoiding the cost of importing cover material. Also, a market might exist for reclaimed soil for use in other applications such as soil enricher

Combustible reclaimed waste can be mixed with fresh waste or other combustible material and burned to produce energy

By reducing the size of the landfill footprint through cell reclamation the facility operator may also be able to either lower the cost of closing the landfill or make land available for other uses.

Hazardous wastes if uncovered during LFMR, especially at older landfills, could be managed in an environmentally sound manner.

India generates 80% methane emissions om dumping of waste. Biomining can help achieve a signi cant reduction of this emission and conservation of land parcels for waste managementof future generations.

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