Recycling of organic wastes through composting for land applications: a Nigerian experience.

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ID: 97778
2011
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Ranked #4 of 37 articles by views in Waste management & research : the journal of the International Solid Wastes and Public Cleansing Association, ISWA

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Abstract
In-vessel composting, a contribution to sustainable solid waste management, was conducted on source-separated waste materials generated in Abeokuta city, south-west Nigeria. Feedstock (household, agricultural and municipal waste) and the resultant composts were chemically characterized using standard procedures. Identification and changes in the microbial population during composting, the effects of composting on waste volume reduction (WVR) and elemental composition of composts were evaluated. Product performance on plant growth and metal uptake were then assessed using African spinach (Amaranthus hybridus) in a screen house for 8 weeks. Metals were determined in acid digest using atomic absorption spectrometry. Compost yields and WVR ranged from 35.28 to 48.68% and 51.66 to 64.72%, respectively. Compost heavy metal (Cu, Cr, Zn, Ni, Cd and Pb) concentrations (mg kg( -1)), ranging from 0.67-0.82; 0.13-7.5; 0.001-0.22; 1.67-18.33; 6.50-17.67; and 0.83-6.00 for Cu, Pb, Cd, Ni, Cr and Zn, respectively, were within limits for class A+ composts. The effect of composting varied with element type and significantly (p < 0.05) reduced microbial population by 44.44 to 88.46%. Plant height, leaf number and biomass yield gave positive correlations (r = 0.950 to 0.977; 0.978 to 0.989 and 0.99, respectively; p < 0.05) with applied compost rate. Low-metal composts were produced but the presence of Cd and Pb in plant tissues calls for further research on the long-term effect of products on plant metal uptake in amended soils. The study is a contribution to the data bank of composting as a low technology waste management option in the developing countries.
Reference Key
adekunle2011recyclingwaste Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Adekunle, Iheoma M;Adekunle, Adebola A;Akintokun, Aderonke K;Akintokun, Pius O;Arowolo, Toyin A;
Journal Waste management & research : the journal of the International Solid Wastes and Public Cleansing Association, ISWA
Year 2011
DOI
10.1177/0734242X10387312
URL
Keywords
Capacity Management impacts research ranking solid waste global trend predictions

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