Business in coffee grounds: growing mushrooms

In 1994, ZERI (ZeroEmissionsResearchInitiatives, Zero Emission Research and Innovation Foundation) first used the discarded coffee pulp from the farm as a substrate to grow mushrooms for human consumption, and then used the substrate to raise animals. It took nearly 10 years to do research, using 20 academic papers to support plans from pulp to protein, from farm to consumer.