Enhancement of Black Soldier Fly (Hermetia Illucens) Production for Organic Waste Management

Authors

  • Elizabeth karimi meru university of science and technology
  • Joy Riungu Meru University of Science and Technology
  • Kenndy Gachoka Meru University of Science and Technology

DOI:

https://doi.org/10.58506/ajstss.v4i2.329

Keywords:

BSF, color preference, emergence, faecal waste, kitchen waste

Abstract

Addressing sustainable management of faecal matter has become one of the most pressing challenges of our time. It's a global issue that demands attention and innovative solutions. One such innovative solution is utilizing black soldier fly (BSF) technology, which enables bioconversion of faecal matter into valuable resources. In this study, we assessed the oviposition performance of BSF, and the adult emergence rates under different conditions. To achieve this, three feed substrates; faecal matter (FM), kitchen waste (KW), and a FM: KW at a ratio of 1:1. We also tested colour preference on oviposition performance using three flexible plastic tubes, coloured white, yellow, blue, and black as oviposition structures. Three cages of dimensions 2.5m × 1.2 m, 2m × 1 m, and 1m × 1m were used for oviposition and adult emergence tests, whereas flexible plastic tubes were used to collect eggs for comparative purposes. Approximately one kilogram of each substrate was placed into each feeding tray measuring 26 cm × 13 cm × 11 cm with 5 g of five 5-day-old larvae added, and monitored until the pupa stage, after which adult emergence and oviposition were determined. The results indicated that BSF fed on FM: KW at a ratio of1:1had the highest egg production (P < 0.05) (9.38 g) whereas FM and KW attained 4.65g and 5.22 g, respectively. Additionally, 2.5m × 1.2 m cage size was found to be most effective for oviposition (P < 0.05), at 16.38 g of eggs compared to1 m ×1 m at 4.53 g. However, cage size had no impact on adult emergence (P> 0.5). The results also showed that a black-coloured egg tube was the most preferred site for oviposition. Our findings clarify further effective and economical methods to boost the production of BSF, handle and recycle wastes from onsite facilities and retrieve resources that can be utilized as animal feed and organic fertilizer.

Author Biographies

Joy Riungu, Meru University of Science and Technology

Dr. Joy Riungu holds PhD in Sanitation and Environmental Engineering (Specialization in Sanitary Engineering), from Technical University (TU), Delft, Netherlands (NL) in partnership with UNESCO-IHE, Delft, NL, Master of Science in Environmental Engineering and Management, from Jomo Kenyatta University of Agriculture and Technology (JKUAT), Kenya, and BSc in Agricultural Engineering, Egerton University, Kenya. She is a Lecturer, Civil Engineering Department, MUST, and Director, Sanitation Research Institute (SRI). Dr. Riungu has vast experience in sanitation management, technology development, testing, and implementation, particularly within urban informal slums and peri-urban settlements. Her intervention point is applying innovative sanitation technologies to address the vast community sanitation challenges. Additionally, Dr Riungu has vast experience in the adoption of circular economy models in sanitation and has a climate change mitigation strategy.

Kenndy Gachoka, Meru University of Science and Technology

Kennedy Gachoka, PhD. Entomologist. Senior Lecturer at Meru University of Science and Technology. He is a member of the African Association of Insect Scientists (AAIS). He pursued his graduate work both in Brazil and Ghana, having graduated in Biological Sciences from Jomo Kenyatta University of Agriculture and Technology, Kenya. Dr. Gachoka’s area of interest is Integrated Pest Management, specifically the chemical ecology of arthropod pests, besides teaching and supervision. For doctoral studies, he characterized chemically and biologically the pheromones of the Cayenne tick. This is a three-host tick species of great importance owing to its role in the transmission of pathogens in animals and man. In his studies, Dr. Gachoka has employed single sensillum electrophysiological recording techniques, GC-MS/Single Ion Monitoring, and a range of molecular methods to investigate tropical pests of vegetable, ornamental and field crops. Dr Gachoka has teaching, research and administration experience spanning 10 years at the University level. He has successfully supervised over 15 students at Bachelor, Master, and PhD level so far and also holds several Committee appointments at the institution. He has several ongoing research projects alone and in collaboration with like-minded researchers both within MUST and other local and international institutions.

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Published

2026-01-13

How to Cite

karimi, E., Riungu, J., & Gachoka, K. (2026). Enhancement of Black Soldier Fly (Hermetia Illucens) Production for Organic Waste Management. African Journal of Science, Technology and Social Sciences, 4(2), PAS 128–136. https://doi.org/10.58506/ajstss.v4i2.329

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Section

Pure and Applied Sciences

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