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. 2023 May 2;14(5):434.
doi: 10.3390/insects14050434.

Potential Application of Black Soldier Fly Larva Bins in Treating Food Waste

Affiliations

Potential Application of Black Soldier Fly Larva Bins in Treating Food Waste

Irfana Kabir Ahmad et al. Insects. .

Abstract

The increase in the global population has led to a rise in organic waste generation and landfill sites. Consequently, there has been a global shift in focus towards the utilization of BSFL to address these challenges. This study aims to design, develop, and test a user-friendly BSFL bin and identify the optimal MCCM for treating organic waste using BSFL. The four BSFL bins have a dimension of 330 mm (width) × 440 mm (length) × 285 mm (height). This study uses mixtures of food waste added with different MCCMs, including chicken feed, rice bran, and garden waste. We add the mediums to the BSFL bins every third day and measure the humidity, ambient temperature, pH, medium temperature, and BSFL weight and length. The measurements show that the fabricated BSFL bins can fulfill the BSF lifecycle requirements. Wild BSFs lay eggs in the medium of BSFL bins, and the hatched larvae decompose it. When they reach the prepupae stage, they climb the ramp into the harvesting container. The results show that the food waste without MCCM produced the heaviest (0.228 g) and longest (2.16 cm) larvae; the prepupae are 2.15 cm long and weigh 0.225 g; and the growth rate is 53.72%. However, the high moisture content of 75.3% makes the maintenance work challenging. The medium with MCCM has a markedly lower moisture content of 51-58%. A comparison of the three MCCMs shows that the chicken feed produces the larvae and prepupae with the highest growth rate (the larvae are 2.10 cm long and weigh 0.224 g, the prepupae are 2.11 cm long and weigh 0.221 g, and the growth rate is 72.36%) and the frass with the lowest moisture content (51.2%). An effective BSFL composting system is easy to manage and produces the biggest larvae. In summary, food waste mixed with chicken feed is the most suitable MCCM for treating organic waste using BSFL.

Keywords: Hemertia illucens; black soldier fly bin design; chicken feed; composting; organic waste.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Design of the BSFL bin, (a) side view; (b) top view; and (c) front and rear view.
Figure 2
Figure 2
BSFL bin prototype.
Figure 3
Figure 3
The fabricated BSFL bin, (a) inside bin; (b) lid without roof; and (c) lid with roof.
Figure 4
Figure 4
Condition of MCCM before mixing with food waste: (a) chicken feed; (b) rice bran; and (c) pulverized garden waste.
Figure 5
Figure 5
Change in the pH of the medium.
Figure 6
Figure 6
Changes in the temperature of the medium.
Figure 7
Figure 7
Change in the moisture content of the medium.
Figure 8
Figure 8
Waste Reduction Index (WRI).
Figure 9
Figure 9
The average weight of the larvae (g).
Figure 10
Figure 10
The average length of the larvae (cm).
Figure 11
Figure 11
The physical changes in the frass.
Figure 12
Figure 12
The harvesting container on second rearing cycle Day 11.

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