- Title
- Formulation of Fish Feed from Supermarket Food Waste
- Creator
- Vundisa, Noluyolo
- Description
- Food waste (FW) represents a significant anthropogenic burden, driving economic losses, environmental degradation, and social disparities. This study aimed to elucidate the seasonal variability and compositional heterogeneity of FW generated within the retail sector, specifically focusing on its potential as a novel aqua-feed resource. A comprehensive 12-month sampling protocol was implemented across four retail departments, followed by a detailed proximate chemical analysis of processed FW. Three experimental diets were formulated, incorporating 0%, 25%, and 50% FW, and evaluated in a six-week feeding trial using tilapia. Seasonal analysis revealed a consistent dominance of vegetable waste, with peak contributions reaching 65.7% in spring and a notable contribution from fruit waste. Conversely, bakery and grain waste constituted minor fractions of the overall FW stream. Diet 1 exhibited the highest overall specific growth rate, reaching 1.54±0.12, surpassing diet 3 (0.86±0.57) and diet 2 (0.74±0.62). Specific growth rate analysis demonstrated a statistically significant advantage for the control diet, highlighting the need for further nutritional optimization of FW-based diets. This research quantifies the substantial daily FW generation within retail environments, emphasizing the critical need for targeted waste mitigation strategies. Moreover, it establishes the potential for sustainable FW repurposes within aquaculture, offering a viable alternative to conventional feed ingredients. Future investigations should prioritize optimizing FW processing techniques, rigorous safety assessments, and developing nutritionally balanced feed formulations to enhance digestibility and promote sustainable aquaculture practices.
- Description
- Thesis (Doctoral)
- Date
- 2024
- Subject
- Food waste
- Subject
- Aquafeed
- Subject
- Retail sector
- Subject
- Sustainable aquaculture
- Subject
- Resource recovery
- Subject
- Specific growth rate
- Identifier
- http://hdl.handle.net/11260/13401
- Identifier
- vital:78701
- Language
- English
- Rights
- Walter Sisulu University
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- Visitors: 8
- Downloads: 0
| Thumbnail | File | Description | Size | Format | |||
|---|---|---|---|---|---|---|---|
| View Details Download | SOURCE1 | DISSERTATION_VUNDISA NOLUYOLO_2025.pdf | 3 MB | Adobe Acrobat PDF | View Details Download |