dan long wrote:
Unfortunately, my main questions hasn't been answered yet as in: how much can i expect to yield? It doesn't seem very sustainable to buy in chicken and fish feed. It takes effort to grow fish and chicken feed. But if the only thing i have to do to feed my critters is to poop in a bucket and convince my wife to do the same then that seems like a pretty good deal to me!
Peter Ellis wrote:
I indicated before that the larvae are very efficient at converting food into larvae, in the 90 percent range. So ten pounds of humanure could be expected to yield nine pounds of larvae. But, they are seasonal, warm weather creatures, so depending on your location, you may or may not get conversion and yield year round.
I indicated before that the larvae are very efficient at converting food into larvae, in the 90 percent range. So ten pounds of humanure could be expected to yield nine pounds of larvae.
Peter Ellis wrote:Thanks for the correction, Abe. I had read, some time ago, about bsf reducing the compost material by ninety percent and crossed my wires to assume that meant ninety percent conversion.
Thank you for straightening that out.
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.
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