Abstract
Composting has proven to be most effective in combating large organic waste generation in urban settings like Ibadan. This study was designed to determine macro-invertebrate population changes as indicator for stages of organic waste composting. Mixture of cow rumen (240 kg) and vegetable (80 kg) waste were shared equally into aerated (A) and non-aerated (B) windrows. Composite samples were taken twice from the each windrow for eight weeks. Macro-invertebrates were separated from compost by spread and Berlese funnel methods and species biodiversity by Simpson's (D) and Shannon-Weiner (H) indices. Data were analysed using descriptive statistics and t-test at 5% level of significance. Dipteran, Coleopteran and Acarina population changes were predominantly observed. Biodiversity scores of D and H were 0.21; 1.89 in A and 0.19; 1.12 in B. Windrow B had more species abundance than A. Successive changes in macro-invertebrate population can be used with physico-chemical parameters during composting process.
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