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Building local circular economy with black soldier fly farming
Black Soldier Fly (BSF) farming offers a powerful model for creating hyper-local, waste-to-food ecosystem by converting organic waste into high-value animal feed, fertilizer, and even human food ingredients. By integrating BSF farms with local waste providers, livestock farmers, and crop producers, communities can create a local circular economy, reduce landfill waste, lower feed costs and enhance agricultural sustainability.
01 · The ecosystem
1. The circular BSF ecosystem: How it works
Step 1: Sourcing local organic waste
- Food processors (fruit/vegetable scraps, brewery grains).
- Supermarkets & restaurants (spoiled produce, bakery waste).
- Agricultural residues (crop husks, damaged harvests).
Key Benefit: Diverts waste from landfills while providing free/low-cost BSF feedstock.
Step 2: Farming BSF for feed and fertilizer
BSF larvae consume waste, converting it into:
- Protein-rich insect meal (for poultry, pigs, fish).
- BSF oil (for feed or cosmetics).
- Frass (insect manure) – a potent organic fertilizer.
Key Benefit: 1 ton of organic waste → ~200 kg BSF larvae + 250 kg of frass.
Step 3: Feeding local livestock & fish
- Poultry & pig farms – Replace 10–30% of soybean meal with BSF protein.
- Aquaculture – BSF meal improves fish growth rates (e.g., tilapia, trout).
- Pet food – Local brands use BSF as a sustainable protein source.
Key Benefit: Reduces reliance on imported feed (lower costs, lower carbon footprint).
Step 4: Closing the circular economy loop with frass fertilizer
- Vegetable farmers use frass to enhance soil health.
- Their crop waste then becomes BSF feedstock, completing the circular economy cycle.
Key Benefit: Improves crop yields while supporting zero-waste farming.
02 · Case study
2. Case Study: A local BSF network in action
Example: A mid-sized BSF farm partners with:
- ✔ 2 supermarkets (weekly vegetable waste).
- ✔ 1 brewery (spent grains).
- ✔ 3 poultry farms (buying BSF meal).
- ✔ 5 vegetable growers (using frass).
Results:
- 30% lower feed costs for poultry farmers.
- 20% higher crop yields for vegetable growers.
- 5 tons/week of waste diverted from landfills.
03 · Partnerships
3. Key strategies for building local partnerships
A. Engage waste providers
- Offer free waste pickup in exchange for long-term supply agreements.
- Highlight sustainability benefit (waste reduction, CSR goals).
B. Collaborate with farmers
- Provide free trials of BSF feed or frass.
- Share success metric (e.g., “Farm X saved $5,000/year on feed”).
C. Work with local governments
- Advocate for waste-to-feed incentives (tax breaks, grants).
- Develop community composting programs with BSF integration.
D. Educate the community
- Host farm tours showing the waste-to-food cycle.
- Create short videos for social media (e.g., “How our town wastes less”, “Creating local circular economy with BSF”).
04 · Benefits
4. Economic & environmental benefits
Aspect → Impact
- Waste reduction: Cuts landfill use; lowers disposal fees
- Feed cost savings: Replaces expensive soy/fishmeal
- Crop productivity: Frass boosts soil nutrients
- Local jobs: Creates roles in farming, processing, logistics
- Carbon footprint: Slashes emissions from waste & imported feed
05 · Getting started
5. Getting started: First steps for farmers
- 1. Map local waste streams (talk to grocers, food processors, farms).
- 2. Start small (test BSF growth on different waste types).
- 3. Pilot partnership (e.g., supply one poultry farm for 3 months).
- 4. Scale with demand (add more waste suppliers & buyers over time).
06 · Takeaway
Final takeaway
Black Soldier Fly farming isn’t just about insects – it’s about transforming waste into a community resource by creating a circular economy. By connecting local waste generators, livestock farmers and crop growers, BSF hubs can create resilient, self-sustaining food systems that benefit the economy and environment alike.
Next Steps:
- Identify 1–2 potential waste suppliers in your area.
- Reach out to a nearby chicken or fish farm to gauge interest.
- Calculate cost savings to build a compelling case.
07 · Learn more
Learn more about BSF farming in the Insect Farm Hub!
Manna Insect has launched a comprehensive insect farming platform designed for learning, managing, monitoring and networking. There are tons of free content about insect farming, as well as a lot of paid premium content, that dives even deeper in black soldier fly business.
Join the Insect Farm Hub for free!
Read also: Building a professional level BSF farm for under $10,000
Keep exploring
Related topics and pages
- Article library — the library this article joins
- Learn hub — the courses and libraries behind the local circular economy theme
- BSF business course — the course that covers the business side of a local BSF network
Read next
- Building a professional level BSF farm for under $10,000 — the article this post ends with as a read also: the low-cost farm setup
- Why traditional animal farmers should add BSF farming to their setup — the sibling case for the farmers this local network feeds and works with
- Frass – a forgotten business opportunity in insect farming — the companion article on the frass fertilizer side of the circular loop
- Key production costs in black soldier fly farming: Evaluation and business impact — the companion article pricing the local farm's production costs: feedstock, labor, energy, processing and facilities
Next step
Plan your local BSF loop
Questions on waste sources, partnerships or the business case are the fastest way for Manna to help you shape a local network.