A physical fractionation of a compost obtained by municipal solid wastes (MSW) was conducted by drysieving process, to quantify coarse impurities and assess the distribution of nutrients, heavy metals and salinity values in particle size fractions of 2, 1.2–2, 0.8–1.2, 0.4–0.8, 0.2–0.4, 0.1–0.2 and <0.1 mm diameter. The whole unfractionated compost and all physical fractions were analyzed for the same chemical parameters. The results showed that the studied compost was of a low grade due to high salinity and heavy metal concentrations, and the presence of coarse impurities, mainly glass. The physical fractionation analysis showed that heavy metal and base cations concentrations, and salinity values significantly increased with decreasing of particle size, whereas macro nutrients such as C, N and P were more evenly distributed among the different particle size fractions. Overall, our results showed that the removal of selected particle size fractions <0.8 mm and coarse impurities (e.g. glass impurity >2 mm) could significantly improve the compost quality without reduce its fertilization potential. We concluded that particle size fractionation is a feasible and sustainable approach to improve composted MSW materials for their safe recycle in agriculture.

Assessment of a particle size fractionation as a technology for reducing heavy metal, salinity and impurities from compost produced by municipal solid waste / Zahed Sharifi;Giancarlo Renella. - In: WASTE MANAGEMENT. - ISSN 0956-053X. - STAMPA. - 38:(2015), pp. 95-101. [10.1016/j.wasman.2015.01.018]

Assessment of a particle size fractionation as a technology for reducing heavy metal, salinity and impurities from compost produced by municipal solid waste

RENELLA, GIANCARLO
2015

Abstract

A physical fractionation of a compost obtained by municipal solid wastes (MSW) was conducted by drysieving process, to quantify coarse impurities and assess the distribution of nutrients, heavy metals and salinity values in particle size fractions of 2, 1.2–2, 0.8–1.2, 0.4–0.8, 0.2–0.4, 0.1–0.2 and <0.1 mm diameter. The whole unfractionated compost and all physical fractions were analyzed for the same chemical parameters. The results showed that the studied compost was of a low grade due to high salinity and heavy metal concentrations, and the presence of coarse impurities, mainly glass. The physical fractionation analysis showed that heavy metal and base cations concentrations, and salinity values significantly increased with decreasing of particle size, whereas macro nutrients such as C, N and P were more evenly distributed among the different particle size fractions. Overall, our results showed that the removal of selected particle size fractions <0.8 mm and coarse impurities (e.g. glass impurity >2 mm) could significantly improve the compost quality without reduce its fertilization potential. We concluded that particle size fractionation is a feasible and sustainable approach to improve composted MSW materials for their safe recycle in agriculture.
2015
38
95
101
Zahed Sharifi;Giancarlo Renella
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/996209
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