Farmers have been experimenting with animal waste for centuries, using it as a fertilizer or as a way to recycle healthy nutrients back into the soil: While some focused on traditional forms of waste, others directed their attention to the benefits of “bone black,” bone char or animal char.
Many see its benefits as a soil amendment. If the soil was dry, it could help retain water. If the soil was wet like a sponge, it could be crushed and sprinkled in to retain nutrients.
Bone char is derived from carbonizing crushed animal bones using a high-heat process known as pyrolysis. When processed through an energy-efficient airtight burner, charcoaled materials can be cleanly burned, finely ground and added to compost.
Primarily rich in calcium phosphate, calcium carbonate and micronutrients, bone char is granular and useful as an adsorbent. Since prehistoric times, it has been used to create bone black pigment used notable painters and artists. Modern uses centered on sugar whitening and defluoridating water. Continue Reading →