Our model

A closed loop, from waste to value.

Every stage - sourcing, processing, manufacturing and delivery - is built to turn overlooked biomass into fuel people can rely on.

How it works

From residue to resource.

Five stages turn discarded biomass into fuel someone can rely on.

Suitable biomass residues — charcoal dust, farm waste — are sourced from mills, traders and farms that would otherwise burn or dump it.

Raw material is carbonized, blended and pressed under controlled conditions into a dense, consistent fuel.

Every batch is dried and checked for consistency — the difference between a fuel you can plan a kitchen around and one you can't.

Finished product reaches households, kiosks, restaurants and institutions — directly and through distribution partners.

What started as waste becomes affordable energy, local jobs, and a cleaner alternative to charcoal.

Sourcing

We work with farms that have biomass residue they don't have a use for, turning a disposal problem into a supply relationship.

Maize cobsCharcoal dustRice husksCoffee husks

Quality

Distribution

Bagged briquettes sold directly to households and small vendors.

Scheduled deliveries to restaurants, schools and other high-volume kitchens.

Local stockists who carry Sironka briquettes in their own outlets.

Currently delivering countrywide.

The loop

Sironka doesn't just make a cleaner-burning product — it closes a loop that Kenya's charcoal trade currently leaves open.

charcoal dust and farm residue picked up from mills and farms that would otherwise burn or dump it.

Carbonized, bound and pressed into briquettes at the production site.

Sold direct or through resellers to households, restaurants and institutions.

Every ton burned as briquette fuel is a ton of charcoal that didn't need cutting timber.

Schools, hotels, bakeries and institutions get tiered wholesale pricing and scheduled delivery across Nairobi and satellite towns.