Biomass hot air generators for bakery ovens and rusk drying
Indirect, because the air touches the bread.
A biomass hot air generator supplies bakery ovens and rusk dryers with clean, filtered air between 50 and 150 °C, heated indirectly so combustion products never reach the product. It replaces diesel or LPG firing with pellets, briquettes or crop residue while holding the same temperature discipline the process requires.
Indicative price of a biomass hot air generator, Ex-Works (EXW): USD 3,140–14,135
Shipping, customs clearance and local duties are extra. The final price depends on the configuration and is fixed in the written quotation.
Why indirect matters in a bakery
Baking and rusk drying are food processes with direct air contact. Any combustion product that reaches the air stream reaches the product — as odour, as surface deposit, or as a contaminant that shows up in a buyer’s audit.
An indirect generator separates the two streams with a heat exchanger. That is the whole argument, and it is why direct-fired biomass is not an acceptable substitute in a bakery even though it is cheaper.
Where it fits on a bakery line
| Stage | What the heat does | Typical range |
|---|---|---|
| Rusk / toast drying | Second-bake moisture removal, taking the slice to 2–4 % moisture | 120–150 °C |
| Biscuit drying and cooling zones | Post-bake stabilisation; biscuits leave the oven at 90–100 °C | Conditioned air, not added heat |
| Proofing support | Gentle warm air at 75–85 % relative humidity | 30–38 °C, tempered |
| Ingredient and tray drying | Ancillary drying duty | 50–150 °C generator range |
Specifications
| Parameter | Value |
|---|---|
| Matched burner | 200,000–900,000 kcal/h |
| Airflow | 2,500–3,000 m³/h per generator |
| Delivered air temperature | 50–150 °C, controlled |
| Heat transfer | Indirect, double chamber, three-pass |
| Filtration | MERV-8 |
| Fuels | Wood pellets, biomass pellets, 90 × 90 mm briquettes, crop residue |
| Control | Delta PLC with recipe management |
| Warranty | 12 months from date of shipment |
| Lead time | 10–18 weeks from confirmed order and receipt of advance payment |
This page covers the bakery duty. For the underlying equipment see the biomass hot air generator; for the fuel stage see the biomass pellet burner; for the adjacent frying duty see snack frying and oil heating.
Supply outside West Africa
We accept orders from any country. West Africa is the market these systems are engineered around and where most of them go, but there is no territory we will not supply.
Lead time, warranty and scope of supply do not change with the destination: manufacture in 10–18 weeks from confirmed order and receipt of advance payment, warranty 12 months from date of shipment, and spares dispatched alongside the machines. For installation outside the region the buyer covers the team’s travel, accommodation and entry formalities — stated up front because it is a real line in the budget. Documentation and the operator interface are supplied in English and French; other languages on request.
Frequently asked questions
Can biomass hold a bakery setpoint as tightly as gas?
A well-controlled biomass system holds a process setpoint closely, but it responds to load changes more slowly than a gas burner because it carries thermal mass in the combustion chamber. The double-chamber design exists to buffer that: the second stage holds temperature while the first responds. Across a rusk second bake at 120–150 °C the difference is not noticeable; for rapid cycling, discuss the duty profile at sizing.
Does the bakery need to store fuel on site?
Yes. Pellets at 6–8 mm and 90 × 90 mm briquettes both need covered, dry storage: moisture destroys calorific value, wet pellets crumble, and rain leaches the CNSL out of cashew shell. Storage volume is sized against your firing rate and delivery frequency, so a weekly delivery and a daily one call for very different footprints on the same line.
What changes operationally versus an LPG-fired oven?
Three things: a daily ash-removal task, a fuel-handling routine, and a scheduled heat-exchanger cleaning interval. In exchange, fuel cost moves to a local currency and a locally available fuel. It is a trade of operator time against fuel cost and currency exposure, made once across the whole 200,000 to 900,000 kcal/h range.
Discuss a bakery installation
Tell us the oven type, the line throughput and the duty profile, and we will size the heat stage against it.
Talk to an engineer