Investigating the properties of granulated compost fertilizer produced from organic waste with the national compost standard.
Subject Areas : Journal of Quality and Durability of Agricultural Products and Food Stuffs
Kazem Roghani
1
,
Shahrzad Khoramnejadian
2
,
Samira Ghiasi
3
,
Ali Dehghanbanadaki
4
1 - Ph.D. Student, Department of Environment, Damavand Branch, Islamic Azad University, Damavand, Iran
2 - Associate professor, Department of Environment, Damavand Branch, Islamic Azad University, Damavand, Iran
3 - Associate professor, Department of Environment, Central Tehran Branch, Islamic Azad University, Tehran, Iran
4 - Associate professor, Department of Civil Engineering, Damavand Branch, Islamic Azad University, Damavand, Iran (Concrete and Asphalt Research Center, Damavand Branch, Islamic Azad University, Damavand, Iran)
Keywords: Granular compost, Organic waste, National compost standard,
Abstract :
The production of granular compost fertilizer from organic waste, especially in cities, can be a sustainable solution to reduce the amount of waste and improve the quality of urban soils. The purpose of this research was to investigate the production process of granulated compost fertilizer from organic waste and analyze the results of production compost tests and compare it with the national compost standard. In this descriptive study, the physical, chemical and microbial properties of granulated compost produced from organic waste were compared with the national compost standard. Sampling was done from three different depths of the compost mass and the samples were transferred to the laboratory. Based on the results, the average amount of organic matter in the granulated compost of site 19 of Tehran municipality was 76.12% and the amount of organic carbon in the compost was 44.30%. Germination index 80%, concentration of total nitrogen, phosphorus and potassium respectively 1.34, 1.01, 0.57, electrical conductivity 4.55, average pH index 7.54, ratio of ammonium to nitrite 1.27, concentration Lead 18.94 (mg/kg), zinc 73.12 (mg/kg) and nickel 1.45. The average concentration of cadmium and cobalt in the samples was 0.45, 1.18 (mg/kg), respectively. The average concentration of copper and chromium in the compost sample was measured as 21.45, 0.71 (mg/kg), respectively. Microbial analysis of granulated compost samples did not show any microbial contamination caused by salmonella and fecal coliform in granulated compost fertilizer. The results of this research showed that granulated compost fertilizer can be produced from urban organic waste and is a solution for urban organic waste management. The findings indicated the practicality of compost production as a sustainable approach in urban management, reducing waste in the fruit and vegetable market and increasing soil quality.
