Inderscience Publishers

Evaluation of gamma irradiation for bio-solid waste management

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Gamma irradiation is a form of pure energy which is currently used most widely for food and waste irradiation. To evaluate the potential of gamma irradiated sludge for its suitability as a soil amendment in agriculture, field experiments were carried out in a root crop, carrot (Daucus carota). Treatments consisting of three sources of manure (Farmyard Manure (FYM), gamma-irradiated sewage sludge and non-irradiated sewage sludge), each at three different levels (5, 10 and 15 t ha−1), were compared. The growth parameters and yield of carrot was not significantly influenced by the three sources of manure or their different levels. Values for EC, pH, organic carbon, total N, available P and K, metallic micronutrients (Zn, Mn, Fe, Cu) and heavy metals (Ni, Cd, Pb, Co) indicate no adverse effect on soil properties.

Keywords: gamma irradiation, sewage sludge, irradiated sludge, hygienisation, farmyard manure, heavy metals, bio-solid waste, waste management, carrots, crop yield

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