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Effect of collection system on mineral content of biowaste

Author

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  • Huerta-Pujol, Oscar
  • Gallart, Montserrat
  • Soliva, Montserrat
  • Martínez-Farré, F. Xavier
  • López, Marga

Abstract

The EU is committed to encourage biological treatments of organic waste as an alternative to landfill and also to enhance organic matter recycling. When these wastes are composted, the composition of the initial raw materials is very important in order to obtain a good quality product. In this article, the mineral composition of the organic fraction obtained from source-sorted collection (SC) and the organic fraction mechanically separated (MS) from mass-collected municipal solid waste was evaluated. Also, the compositions of these 2 raw materials that are used in the current Spanish municipal solid waste biological treatment facilities were compared. The mineral elements analyzed were the total content of the heavy metals Zn, Cu, Ni, Cr, Pb and Cd, and the plant nutrients P, K, Na, Ca, Mg, Fe and Mn. The results obtained were expressed on dry matter basis and on mineral matter basis. Important differences were detected between SC and MS samples, on both dry and mineral matter basis. In general, nutrient contents are higher in SC than in MS, and heavy metal contents are significantly lower in SC. Our results also support the idea that the heavy metal migration from the non-compostable materials to the decomposable matrix takes place from the beginning of the process while both types of materials are in contact.

Suggested Citation

  • Huerta-Pujol, Oscar & Gallart, Montserrat & Soliva, Montserrat & Martínez-Farré, F. Xavier & López, Marga, 2011. "Effect of collection system on mineral content of biowaste," Resources, Conservation & Recycling, Elsevier, vol. 55(11), pages 1095-1099.
    • Handle: RePEc:eee:recore:v:55:y:2011:i:11:p:1095-1099
    DOI: 10.1016/j.resconrec.2011.06.008
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    References listed on IDEAS

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    1. López, Marga & Soliva, Montserrat & Martínez-Farré, F. Xavier & Fernández, Mónica & Huerta-Pujol, Oscar, 2010. "Evaluation of MSW organic fraction for composting: Separate collection or mechanical sorting," Resources, Conservation & Recycling, Elsevier, vol. 54(4), pages 222-228.
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    Cited by:

    1. M. A. Vázquez & R. Plana & C. Pérez & M. Soto, 2020. "Development of Technologies for Local Composting of Food Waste from Universities," IJERPH, MDPI, vol. 17(9), pages 1-20, May.

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