The commercial usage of the Jatropha byproducts increases the efficiency and profitability of the Jatropha and the biofuel industry. The Jatropha byproducts are nothing but the Jatropha seed cake and the glycerol that is got during the process of oil extraction. The Jatropha cake left after the extraction of oil can be used as an excellent organic fertilizer and also to power generator.
These cakes are rich in proteins and carbohydrates and also contain bioactive compounds. There is a lot of chance to produce biogas, producer gas, briquettes and other surfactants and lubricants from the Jatropha cake.
Another important byproduct of Jatropha is the glycerol which is used in the production of Propylene Glycol. The Propylene glycol is used in the production of unsaturated polyester resins, poly ether polyols, functional fluids, cosmetics and toiletries flavor.
It is through the transesterification technology that the glycerol is separated from the Jatropha oil. The transesterification is a technology which is used to produce biodiesel from the Jatropha oil.
The oilcake got as a byproduct of Jatropha cannot be used as animal feed since they contain toxins like curcasin and crusin. But the detoxified oilcake can be used as a animal feed but this will increase the cost for detoxification. So the better way is to use the oilcake as a fertilizer.
Studies show that the oil cake and other residue from the extracted oil have high mineral content of nitrogen, phosphorous, and potassium. Hence they can be used as organic fertilizer. It is estimated that one ton of oil cake is equal to 200 kg of mineral fertilizer.
The sediments of the oil that is left during the purification process also have the industrial and commercial value. The residual substance obtained from those sediments are mixed and boiled with caustic soda and water in the preparation of soap.