Paper Information

Journal:   IRANIAN JOURNAL OF FIELD CROP SCIENCE (IRANIAN JOURNAL OF AGRICULTURAL SCIENCES)   WINTER 2016 , Volume 46 , Number 4; Page(s) 699 To 709.
 
Paper: 

ASSESSMENT OF FERTILIZING POTENTIAL OF DIFFERENT SIZE FRACTIONS OF MUNICIPAL SOLID WASTE COMPOST PRODUCED IN SANANDAJ CITY

 
 
Author(s):  SHARIFI ZAHED*, HOSSAINI SEYED MOHAMMAD TAAHER
 
* DEPARTMENT OF SOIL SCIENCE, FACULTY OF AGRICULTURE, UNIVERSITY OF KURDISTAN, SANANDAJ, IRAN
 
Abstract: 

In this study fertilizing potential of municipal solid waste (MSW) compost was investigated by the distribution behavior of heavy metals, nutrient elements and salinity content among the different size fractions. Therefore, 3 compost samples (each composed of 6 subsamples) were collected from Sanandaj MSW Composting Plant. Then, the samples were physically divided into seven fractions of different particle size including >2, 1.2-2, 0.8-1.2, 0.4-0.8, 0.2-0.4, 0.1-0.2 and <0.1 mm, using dry-sieving process. The bulk sample was reserved as control. The results showed that by decreasing of particle size, pH values decreased, however, other surveyed parameters increased. The highest concentration of EC, Zn, Cu, Cd, Pb, Ni, Cr, Mn, N, P, Ca and K was found in the finest fraction (<0.1 mm) with average values of 9.1 dSm-1, 714.4, 450.5, 4.2, 315.5, 55.1, 40.7, 468.5 ppm, 3.0, 1.5, 6.9 and 0.9 % respectively, whereas the lowest concentration were found in the coarsest fraction (>2 mm). Overall, the results suggest that the size fractions less than 0.4 mm with highly heavy metals and salinity content and size fractions more than 2 mm with high impurity (glass, 21.2 times over the permissible limit) were responsible for lowering the quality of the produced compost, thus, removal of selected fractions particle size could significantly improve the compost quality and allowed us to use and its safe recycle in agriculture.

 
Keyword(s): HEAVY METALS, IMPURITIES, MSW COMPOST, SALINITY, SIZE FRACTIONS
 
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