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Accelerating Decomposition Rate of Fresh Faecal Materials from a Farrow-to-Finish Swine Farm with Black Soldier Fly Larvae (Hermetia illucens)

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:  Paper number  131588509,  2013 Kansas City, Missouri, July 21 - July 24, 2013. (doi: http://dx.doi.org/10.13031/aim.20131588509) @2013
Authors:   Adewunmi Taiwo, Evelyn Ama Otoo
Keywords:   Black soldier fly larvae Swine faecal materials waste reduction index environmental pollution decomposition rate bio-decomposer.

Abstract. There is need to generate information required for the development of facilities for reducing environmental pollution caused by careless dumping of raw faecal materials from swine production facilities into streams, channels, ponds and other water bodies in developing countries. The objectives of this work were to use a developed simple bio-decomposer to study the decomposition rate of fresh solid faecal materials obtained from a farrow- to- finish swine production unit when treated with Black Soldier Fly Lavae (BSFL) and fit a regression line to the data generated in the study. With the use of the bio-decomposer, four batches of the Black Soldier Fly Lavae (BSFL) that developed from the hatched eggs were carefully collected and decanted from the faecal materials, after which they were weighed and mixed with four weighed samples of fresh solid swine faecal materials with three replications at an average inclusion rate of 94.3, 81.4, 61.4, and 59.04 gm of BSFL/kg of fresh solid swine faecal materials respectively in a Complete Randomized Design; the fifth sample of fresh solid faecal materials was used as the control. The average decomposition rates for the four samples treated at three treatment levels were 0.046, 0.041, 0.040, and 0.040 kg/day, respectively translating to an average of 0.042 kg/day. These results depict a mean waste reduction index of 6.62 %/day indicating that high waste reduction efficiency has been obtained as attested to by the computed Pearson Correlation Coefficient of 0.958. It was concluded that BSFL could be used for accelerated decomposition of fresh solid swine faecal materials.

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