Agronomic potential value of household urban solid wastes by composting and composts quality assessment

Authors

  • KKA Alate Department of Soil Sciences, Research Laboratory on Agroresources and Environmental Health, School of Agronomy, University of Lome, BP 1515 Lome, Togo
  • G Mawussi Department of Soil Sciences, Research Laboratory on Agroresources and Environmental Health, School of Agronomy, University of Lome, BP 1515 Lome, Togo
  • KD Ayisah Department of Plant Science and Improvement, School of Agronomy, University of Lome, BP 1515 Lome, Togo
  • K Sanda Department of Soil Sciences, Research Laboratory on Agroresources and Environmental Health, School of Agronomy, University of Lome, BP 1515 Lome, Togo

DOI:

https://doi.org/10.3329/ijarit.v9i2.45403

Keywords:

Household Solid Waste, Poultry Manure, Mucuna pruriens, Composting, Composts Quality

Abstract

Using composting technology, the biodegradable fraction of solid wastes collected from Agbalepedogan district in Lomé (Togo) was transformed into composts with no phytotoxicity suitable for use in agriculture. The household urban solid wastes were mixed with poultry manure and Mucuna pruriens leaves in appropriate percentages and transformed into composts. The composting process was monitored by temperature, pH and C/N ratio controlling. The composts quality was appreciated by phytotoxicity test, particle size distribution, contents of nitrogen, phosphorus, potassium, organic matter and trace elements. The results showed that composts particle size distribution presented four fractions (>10 mm, 5-10 mm, 2-5 mm and ≤2 mm) whose average percentages are respectively 9.04±0.2%; 10.71±0.2%; 12.68±0.4% and 67.53±0.6%, respectively. Composts produced contained 1.02±0.1% - 2.72±0.2% of nitrogen, 1.35±0.3% - 2.70±0.4% of phosphorus, 1.31±0.2% - 1.72±0.3% of potassium and 23.50±0.4% - 37.75±0.5% of organic matter. The pH in final composts were between 8.50±0.2 and 9.00±0.3 while C/N ratio varying from 8.06±0.2 to 13.13±0.2. The concentrations of some heavy metals in final products were 79.8±1.7 - 140.2±1.6 mg/kg.dm of zinc, 27.1±1.01 - 76.6±1.03 mg/kg.dm of copper, 2.07±0.33 - 9.19±0.22 mg/kg.dm of lead, 4.13±0.16 - 11.05±0.36 mg/kg.dm of nickel and 0.79±0.02 - 2.15±0.03 mg/kg.dm of cadmium. These concentrations were lower than the limited value for heavy metals prescribed by French and US EPA regulation for organic and organic-mineral fertilizers.

Int. J. Agril. Res. Innov. Tech. 9(2): 1-8, December 2019

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Published

2020-02-09

How to Cite

Alate, K., Mawussi, G., Ayisah, K., & Sanda, K. (2020). Agronomic potential value of household urban solid wastes by composting and composts quality assessment. International Journal of Agricultural Research, Innovation and Technology, 9(2), 1–8. https://doi.org/10.3329/ijarit.v9i2.45403

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