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COMPOSTING TIME REDUCTION OF AGRO-INDUSTRIAL WASTES

2016; Sociedade Brasileira de Engenharia Agrícola; Volume: 36; Issue: 6 Linguagem: Inglês

10.1590/1809-4430-eng.agric.v36n6p1206-1217/2016

1809-4430

Mônica S. S. de M. Costa, Leocir José Carneiro, Luiz Antônio de Mendonça Costa, Dércio Ceri Pereira, Higor Eisten Francisconi Lorin,

Composting and Vermicomposting Techniques

The agro-industrialization of animal products has led to a significant waste generation, which has been stabilized by composting process in specialized plants. Waste stabilization time on composting depends on the handling used. 12 treatments were performed, three frequency turnings combined with two environmental conditions (with and without coverage of the composting area) and with and without commercial inoculant, whose results were submitted to multiple regression analysis. Windrows turned twice a week in the first month had adequate temperature control and stabilization time of 83.5 and 95.5 days for uncovered and covered windrows, respectively. Uncovered windrows have accelerated the process in 10 days on average, with the disadvantage of increasing nutrient losses. The weekly inoculation of Bacillus (subtilis, licheniformis and polymyxa) and Yarrowia lipolytica had no significant effect (p≥0.05).