Feed-shifting strategy for increasing biodiesel production from black soldier fly larvae

Jee Young Kim; Won-Kun Park; Gyeongnam Park; Youngjun Choi; Eilhann E Kwon

doi:10.1016/j.biortech.2024.131633

Feed-shifting strategy for increasing biodiesel production from black soldier fly larvae

Bioresour Technol. 2024 Oct 13:414:131633. doi: 10.1016/j.biortech.2024.131633. Online ahead of print.

Authors

Jee Young Kim¹, Won-Kun Park², Gyeongnam Park¹, Youngjun Choi², Eilhann E Kwon³

Affiliations

¹ Department of Earth Resources & Environmental Engineering, Hanyang University, Seoul 04763, Republic of Korea.
² Department of Biological Engineering, Konkuk University, Seoul 05029, Republic of Korea.
³ Department of Earth Resources & Environmental Engineering, Hanyang University, Seoul 04763, Republic of Korea. Electronic address: ek2148@hanyang.ac.kr.

PMID: 39406310
DOI: 10.1016/j.biortech.2024.131633

Abstract

The aim of this study was to increase the bioconversion efficiency (lipid accumulation) of black soldier fly larvae while simultaneously increasing biodiesel production through a feed-shifting strategy. Feeding with low-lipid feed promoted an increase in larval weight, while high-lipid feed resulted in greater lipid accumulation. Based on this result, a feed-shifting strategy was introduced, which consisted of two stages: first, increasing larval body weight using low-lipid feed, followed by lipid induction for biodiesel production using high-lipid feed. The use of this strategy resulted in an increase in the dry weight of larvae by ≥16 % compared to single feeding systems. This led to a 20 % increase in biodiesel productivity. The waste reduction ratio was enhanced due to the higher bioconversion rate in the feed-shifting strategy compared to that in the single feeding systems. The feed-shifting strategy would contribute to the enhancement of waste-to-energy efficiency.

Keywords: Direct conversion; Lipid induction; Sustainable food waste management; Two-stage cultivation; Waste-to-energy.