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Is BSF the right answer for your biowaste stream? The evaluation I actually run
Every week someone asks me: "Could BSF solve my biowaste problem?"
01 · The evaluation
Before the five questions
My honest answer: most of the time, no. Out of ten waste streams we analyse, maybe one or two clears the bar (i.e. creates significantly enough more value compared to the status quo).
That isn't a BSF problem — the biology works, the low-CAPEX and OPEX tech exist, the numbers add up when the stream is right. It's an evaluation problem. Most people skip the evaluation or run one that's rigged to say yes.
Here's the one I actually use. Five questions, in order. Each one screens out cases.
02 · Question one
1) What is this waste, really?
Not "food waste" — the exact mix. Moisture, protein, ash, contamination, seasonality. A brewery byproduct at 70% moisture with stable composition is a completely different case from weekly-variable market waste at 85%. This is where substrate quality lives — and substrate quality drives everything downstream.
03 · Question two
2) What does disposal cost the producer today?
Landfill fee, haulage, handling, compliance risk — the fully loaded cost per ton. This is the benchmark every solution has to beat. No emotion, just the number on the producer's current invoice.
04 · Question three
3) What are the alternatives earning on the same stream?
Biogas at scale with energy subsidies. Composting for low-value garden waste. Incineration where it's heavily subsidised. Each has a range it wins in. If the stream fits one of them better, we say so and walk away.
05 · Question four
4) What can the outputs actually sell for — locally?
Larvae price at your gate. Frass in your own agricultural market. Oil if extraction is realistic. Local quotes, not premium-price decks from Europe. Soy-meal parity is what sets the ceiling in most markets. What does the regulation say. What are main priorities for animal growers and their willingness to take a risk with a new product.
06 · Question five
5) What is the minimum viable gate fee?
This is the single number the whole evaluation has to produce: $/ton. If it's at or below what the producer pays today → there's a deal. If it's above → walk away and save everyone's time.
Supporting numbers the Manna Analyzer spits out around that one: CAPEX (container-built vs. customer-hosted), OPEX at target scale, payback in months, and sensitivity at ±20% on the key variables. If the case only works in the base scenario, it isn't a real case.
07 · The verdict
The evaluation has to be honest
Most streams fail this test. That's the whole point. The evaluation is only worth running if it's honest enough to walk away. But with experience and right tools, this can be done cost-effectively to all biowaste streams.
I've gone deeper on several of the pieces in recent posts — the four waste methods and where each wins, why BCR is substrate-specific, why profit in BSF is made on the buy (substrate sourcing). Links in the first comment.
What's the stream you'd want to run this on?
Keep exploring
Related topics and pages
- BSF business case evaluation — the process that separates working facilities from the headlines — the wider commodity-business frame this five-question test sits inside
- You have a biowaste problem. Could it actually become profitable? — the 3-step evaluation for whether a biowaste stream can pay
- BSF profit is made on the buy, not the sell — why substrate cost and waste-stream sourcing decide the outcome
Read next
- The four waste methods — where each one wins — how biogas, composting, incineration and landfill each fit, and where BSF wins
- BSF Metrics #1 — Bioconversion Ratio — why the bioconversion ratio is substrate-specific
- BSF profit is made on the buy, not the sell — why profit in BSF is made on the buy, not the sell
- What if you are sitting on valuable biowaste without realising it? — why the unwanted stream, not the easy one, is where BSF fits
Next step
Run the five questions on one stream
Manna can help organise the material, the current disposal cost, the alternatives and the local output value into one honest evaluation.