Growth rates of black soldier fly larvae fed on fresh human faeces and their implication for improving sanitation
Objectives To determine the capacity of black soldier fly larvae (BSFL) (Hermetia illucens) to convert fresh human faeces into larval biomass under different feeding regimes, and to determine how effective BSFL are as a means of human faecal waste management. Methods Black soldier fly larvae were fe...
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Veröffentlicht in: | Tropical medicine & international health 2014-01, Vol.19 (1), p.14-22 |
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Sprache: | eng |
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Zusammenfassung: | Objectives
To determine the capacity of black soldier fly larvae (BSFL) (Hermetia illucens) to convert fresh human faeces into larval biomass under different feeding regimes, and to determine how effective BSFL are as a means of human faecal waste management.
Methods
Black soldier fly larvae were fed fresh human faeces. The frequency of feeding, number of larvae and feeding ratio were altered to determine their effects on larval growth, prepupal weight, waste reduction, bioconversion and feed conversion rate (FCR).
Results
The larvae that were fed a single lump amount of faeces developed into significantly larger larvae and prepupae than those fed incrementally every 2 days; however, the development into pre‐pupae took longer. The highest waste reduction was found in the group containing the most larvae, with no difference between feeding regimes. At an estimated 90% pupation rate, the highest bioconversion (16–22%) and lowest, most efficient FCR (2.0–3.3) occurred in groups that contained 10 and 100 larvae, when fed both the lump amount and incremental regime.
Conclusion
The prepupal weight, bioconversion and FCR results surpass those from previous studies into BSFL management of swine, chicken manure and municipal organic waste. This suggests that the use of BSFL could provide a solution to the health problems associated with poor sanitation and inadequate human waste management in developing countries.
ObjectifsDéterminer la capacité de la larve de la mouche soldat noir (LMSN) (Hermetia illucens) à convertir les matières fécales humaines fraîches en biomasse larvaire sous différents régimes d'alimentation et déterminer dans quelle mesure la LMNS peut être efficace comme moyen de gestion des déchets fécaux humains.MéthodesDes larves de la mouche soldat noir ont été nourries avec des matières fécales humaines fraîches. La fréquence d'alimentation, le nombre de larves et le taux d'alimentation ont été modifiés afin de déterminer leurs effets sur la croissance larvaire, le poids pré‐pupal, la réduction des déchets, la bioconversion et le taux de conversion alimentaire (TCA).RésultatsLes larves qui ont été nourries avec une quantité forfaitaire unique de selles se sont développées de façon beaucoup plus importante en larves et pré‐pupes que celles nourries progressivement tous les deux jours. Cependant, le développement en pré‐pupes a pris plus de temps. La réduction la plus élevée des déchets a été constatée dans le groupe contenant plus de larves, sans dif |
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ISSN: | 1360-2276 1365-3156 |
DOI: | 10.1111/tmi.12228 |