Small Biomass Pellet Line in Zambia

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The First Call – “I Have Bamboo and Sawdust”

The client called us in August 2023. He had been running a small agricultural trading business for years. He noticed that charcoal prices in Lusaka had doubled in two years. At the same time, bamboo was being harvested for construction but the offcuts and powder were being dumped.

He had a building (1,100m² total) in an industrial area. He had water and electricity. He had saved about $110,000 over ten years.

His question: “Can I buy a 1t/h small biomass pellet line in Zambia that runs on bamboo powder and sawdust?”

We asked about moisture content. He sent samples. Bamboo powder from the milling process was 18-22% moisture – too wet for direct pelleting. Sawdust from furniture factories was 12-15% moisture – acceptable. The average was about 16-18%. He needed a dryer.

We told him yes. A 1t/h small biomass pellet production line in Zambia would need a biomass dryer for the bamboo material. But the dryer could burn self-produced pellets as fuel, keeping operating costs low.

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Raw Materials – Two Feedstocks, One Blend

The client set up collection agreements with two bamboo processing plants and three furniture factories in Lusaka.

The client pays per ton delivered. Bamboo powder is more expensive because it requires drying. But the final pellet has higher calorific value (4,500 kcal/kg vs 4,200 kcal/kg for pure sawdust).

The client also uses about 240 tons of self-produced pellets per year as fuel for the dryer – about 8% of total output.

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Why Drying Is Necessary – And How We Designed It

At 18-22% moisture, bamboo powder cannot be pelleted directly. Pellets would crack, mold, and fall apart. The client needed a dryer.

We specified a small rotary drum dryer (1.5m diameter x 6m length) fired by a biomass furnace burning self-produced pellets. The dryer consumes about 0.08 tons of pellets per ton of dry output. For 3,000 tons of finished pellets, the dryer uses about 240 tons – 8% of total output.

Dryer specifications:

• Type: Rotary drum, direct heating
• Length: 6 meters
• Diameter: 1.5 meters
• Heat source: Biomass furnace (30 kg pellets/hour)
• Inlet moisture: 18-22%
• Outlet moisture: 10-12%
• Retention time: 15-20 minutes

The dryer is the single most expensive piece of equipment in this 1t/h small biomass pellet line in Zambia – $18,000 including the furnace and ductwork. But without it, the client couldn’t use bamboo powder.

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Equipment List – Complete Small Line

Equipment price (EXW Qingdao port): $58,000 USD

The client bought the air compressor locally in Lusaka – cheaper than importing.

Shipping: Two 40-foot containers. Departed Qingdao October 15, 2023. Arrived Dar es Salaam Port, Tanzania on November 28, 2023 (Zambia is landlocked). Sea freight: $4,200 USD. Rail freight from Dar es Salaam to Lusaka (about 1,800km) via TAZARA Railway added $3,500 USD and 14 days. Inland trucking from the rail terminal to the site added $500 USD.

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Facility Layout – 1,100m² Total

The client’s building was already standing – a former warehouse on a 1,100m² plot. Total built area 1,100m². We divided it into zones.

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Process Flow – Complete Production Line

Here’s how the 1t/h small biomass pellet line in Zambia actually runs.

Step 1 – Screening
Bamboo powder and sawdust are fed into the trommel screen. Screen holes are about 10mm. Oversize material (large chunks) goes to the crusher. Undersize material goes directly to the dryer.

Step 2 – Crushing
Oversize material is fed into the hammer mill. The mill reduces material to 3-5mm particles. Output is mixed with the undersize material.

Step 3 – Drying
Material passes through the rotary drum dryer. Retention time is 15-20 minutes. Inlet moisture: 18-22%. Outlet moisture: 10-12%. The dryer furnace burns self-produced pellets – about 240 tons per year.

Step 4 – Pelleting
Dried material is fed into biomass granulator. Output: 1 t/h. Die size: 8mm for industrial boilers. The pelleting process uses friction heat (80-100°C) to soften the lignin in the bamboo and wood, which acts as a natural binder.

Step 5 – Cooling
Pellets drop onto a conveyor and cool naturally during transport to the bagging area. No forced-air cooler – the client found that ambient cooling works fine for his volumes. Pellets reach 35°C within 2 hours.

Step 6 – Bagging and storage
Manual bagging station. The client uses 25kg woven polypropylene bags. Bags are stacked on pallets in the finished goods warehouse.

Step 7 – Dust collection
A baghouse filter captures dust from the screen, crusher, dryer, and biomass pellet press. Collected dust is returned to the process. The client has two exhaust stacks: 1# (15m) for process dust, 2# (20m) for dryer exhaust.

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The Zambian Market for Biomass Pellets

Zambia is an emerging market for biomass pellets. The country has:

• Abundant bamboo resources (over 500,000 hectares of natural bamboo)
• Growing industrial sector (textiles, food processing, tobacco curing)
• Rising charcoal prices (charcoal is the primary cooking fuel in Lusaka)

The client’s current customers:

• A tobacco curing plant in Lusaka (100 tons/month)
• Two schools (uses pellets for kitchen stoves) – 50 tons/month combined
• Retail customers in Lusaka (household stoves) – 100 tons/month

He can’t keep up with demand. He’s already planning to add a third pellet mill in 2025 to reach 1.5 t/h.

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What the Client Learned

We spoke with the client in July 2024, five months after startup. Here are his observations.

What worked well:

• The dryer. “Without it, I couldn’t use bamboo powder. Bamboo pellets sell for $10/ton more than sawdust pellets.”
• The baghouse. “ZEMA inspected once. We passed with no issues.”

What he would change:

• “I should have bought a moisture meter.” He runs the dryer without measuring output moisture. Sometimes pellets are too dry (8% moisture) and crack. He’s ordering a meter ($200).
• “The manual bagging is slow.” He’s looking at a small bagging scale ($1,500).

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What We Provided

For this 1t/h small biomass pellet line in Zambia, we delivered:

• Process design – Including dryer sizing and dust collection integration.
• Equipment package – Screen, crusher, dryer, furnace, two pellet mills, conveyors, baghouse.
• Installation supervision – Our engineer spent 14 days in Lusaka.
• Operator training – Two days on moisture management, die changes, and dryer operation.
• Spare parts kit – One spare die, five sets of hammer mill screens, bearings, belts, and filter bags.

We also provided a simple temperature controller for the dryer ($400). The client bought this from us as an add-on.

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Thinking About a Small Pellet Line in Zambia?

If you’re looking at a 1t/h small biomass pellet line in Zambia – or anywhere in Southern Africa – here’s what we’ve learned from this project:

• Drying is necessary for bamboo. Bamboo powder arrives at 18-22% moisture. Budget for a dryer if you want to use bamboo.
• Blending improves pellet quality. Bamboo has higher calorific value; sawdust binds better. The 50/50 blend works well.
• Self-produced fuel for the dryer makes economic sense. The client’s dryer burns pellets that cost him $30/ton to produce. That’s cheaper than buying diesel.
• Start with local customers. Tobacco curing and schools buy consistently and pay on time.

The client in Lusaka is already profitable. He’s expanding. If you have access to bamboo or sawdust and a market for industrial heat, this model works.

Contact us for a site assessment or equipment quote. We can provide references from this biomass pellet project upon request.