Bioconversion of fermented tofu waste into high protein alternative feed using black soldier fly (Hermetia illucens)

Abstract

This study determines the life cycle and nutritional content of Black Soldier Fly (Hermetia illucens) larvae cultured on fermented tofu waste. The materials used in the study were tofu pulp, fermented tofu pulp, tempeh yeast, and the eggs of H. illucens fly. This study used a Completely Randomized Design with four treatments with five replications. The treatments were T0: tofu pulp (0% yeast tempeh); T1: fermented tofu pulp (0.25 % yeast tempeh); T2: fermented tofu pulp (0.5% tempeh yeast), and T3: fermented tofu pulp (0.75 % tempeh yeast). The variables measured included: the life cycle, dry matter conversion, dry matter extraction, and proximate composition of H. illucens larvae. The collected data were processed using variance analysis. The results showed that the H. illucens fly's life cycle follows: from laying eggs to hatching is four days, and growing into adult larvae takes 26-28 days. The dry matter conversion was 11.9 to 22.1%, and dry matter extraction was 55.8 to 67.5%. There was no effect (p>0.05) of adding tempeh yeast on crude protein, ether extract, crude fibre, and ash content. The result showed that the conversion and extraction of dry matter media were higher in the more media. The fermentation of tofu pulp did not increase the nutritional value of H. illucens larvae.