ANALYSIS OF REDUCTION INDEX AND COMPOST RESULT ON THE PROCESSING OF TOFU DREGS USING LARVA BLACK SOLDIER FLY (Hermetia illucens)

Abstract

In the last six years, the production of tofu processing has become the most superior commodity in Kediri City. The tofu waste processing method that can be applied is bioconversion using Black Soldier Fly (BSF). The limitation of the problem in this study is the reduction index of tofu dregs and the measurement of C/N parameters compared to SNI 19-7030-2004. The purpose of this study was to determine the reduction index and compost yield for tofu waste processing using BSF larvae (Hermetia illucens). Subjects of variation of tofu dregs were 50, 55, and 60 gr/day with 50 larvae.

The results of this study obtained a reduction index value of tofu waste using the Waste Reduction Index formula in reactor 1 of 25%, reactor 2 of 50.6%, reactor 3 of 50.4%, and reactor 4 of 47.2%. The reduction in reactor 1 was caused by the drying of the tofu dregs. The reduction in reactors 2 and 3 was caused by larval activity with the appropriate amount of feed. In reactor 4 caused by slower larval activity due to excessive amount of feed. In this study, it can be concluded that the highest tofu waste reduction index was found in the variation of feed 50 g/day with larvae and compost produced by the final media of BSF fly larvae, parameters C/N, not according to SNI 19-7030-2004. Suggestions for this research need to do further research on the testing for bacteria in larval feces and controlling humidity in the feed of BSF fly larvae.