Ipomoea batatas

Ipomoea batatas

Ipomoea batatas

Table 4.2

Ipomoea batatas

Ipomoea batatas

,

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Once fire died out, the charred feedstock is placed on flat surface and allow to cool

or sometimes water is sprinkled to ensure that it does not catches fire. This may not

be necessary when it is needed to be used immediately and where the dry weight is

required to be measured. Once cooled, the biochar is stored in sacks and kept ready

for use. An estimated 70 % of feedstock is charred, while the 30 % is mainly lost

through water moisture, carbon monoxide, and methane.

Plate A4.3 Coconut husk feedstock

Plate A4.4 Dried firewood branches

Figure A4.5 Empty 200 L drum and 45 kg cylinder for charring coconut husk

Perforation

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The Chronological steps in producing charcoal biochar

1. Loading feedstock 2. Inverting the inner chamber in the drum

4. Top layer filling with dry grass kindling

6. Placing cover with chimney to allowing up-flow of smoke

3. Inserting firewood in the burning chamber

5. Kindling from top layer (top view)

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9. Air drying of biochar

8. Top view of fresh charred biochar in pyrolysing chamber 7. After firewood died out, water is

sprinkled on the biochar to avoid burning (optional)