Castor Meal (Deoiled Cake)

Castor Meal (Deoiled Cake)


Castor meal is also variously called castor meal, castor residue, castor extract & de-oiled castor cake Castor meal - the residue obtained from castor cake by the solvent extraction process - is one of the most versatile natural manures. Castor De-Oiled Cake is obtained from castor cake after the multistage solvent extraction. It Contains Proteins and carbohydrates, essential amino acids, Potash minerals, nitrogen and organic matter.It is truly organic manure which enhances the fertility of the soil without causing any damage or decay. It is enriched with the three big elements vital and conducive to the proper growth of crops - Nitrogen, Phosphorus and Potassium. It also has traces of nutrients like Manganese, Zinc and Copper, thus making it a balanced fertilizer. Moreover, it helps to neutralize the detrimental effects of chemical fertilizers.

Detoxification of castor cake is found possible by the treatment of calcium hydroxide, sodium bicarbonate and autoclaving (15 PSI For 30 Min) - after detoxification it can be used as an animal feed. This natural fertilizer being an environment friendly product is used all over the world. France uses this fertilizer for grape plantations done to produce wine. Other countries importing de-oiled cake are Germany, Switzerland and Taiwan.

Castor meal is largely preferred as organic manure, due to the presence of potash minerals, nitrogen and organic matter.Also used in animal feed formulations after detoxification of castor cake.

It is also used as fuel in boilers as it has high calorific value than other fuels like lignite and coal and is also economical. The by-product castor cake has also increasing potentiality of export due to high content of protein. Using advanced technology, the toxic substances are removed from the cake and it is now also used as animal feed. De-oiled cake as a natural fertilizer is exported in two forms
(i) pallet form
(ii) powder form.

Protein 34% approx.
Nitrogen 4-5% min (8% for H1- PROTEIN)
Phosphorous 1% min
Potassium 1% min
Moisture 10 - 12 % max
Oil Content0.50% max

Customized specification can also be achieved

PACKING AVAILABLE - 60Kgs in HDPE & 90 to 100Kgs in JUTE Bags. In containers of 20' & 40'; Bulk in lots of 500 Mts Minimum

It contains

  • Proteins and carbohydrates.
  • Toxic compound, called RICIN, this is a toxic protein and ricinine mild toxic alkaloid.
  • Essential amino acids.
  • Potash minerals, nitrogen and organic matter.
  • The two primary uses of castor meal today are as fertilizer and as fuel
  • De-Oiled Cake is used mainly as fertilizer.
  • It provides all the major & minor nutrients necessary for better plant growth.
  • It also helps in increasing the nutrient uptake by plants .
  • It improves the soil fertility and productivity.
  • It is known to protect the plants from nematodes and termites.
  • It improves the yield & quality of the farm produce.
  • It improves the physical, chemical and biological properties of soil.
  • Increasing yield
  • Improving soil P indices
  • Increasing cane yield and sucrose content in juice
  • Increasing N content in grain and straw
  • Controlling nematodes
  • Increasing tuber yield
  • Plants best fertilized by castor de-oiled cake
  • Maize, Sugarcane, Rice, Banana, Jute, Tomato, Wheat/Barley, Potato and Tobacco

Nutrient Content of Deoiled Castor Cake / Meal

A typical composition of castor residue/meal is as follows:

Organic Matter 80-85% (The organic matter consists of proteins about 32-33%, fibers about 25-30%, ash content - about 6%). It also contains some micro nutrients viz., Calcium, Magnesium, Sulphur, Iron, Zinc, Manganese, Copper etc.

Castor meal is an excellent fertilizer because of high content of N (6.4%), Phosphoric Acid (2.55%), Potash (1%) and moisture retention.

The protein content of castor seed meal varies between 21-48% depending upon the extent of decortications. It has an ideal amino acid profile with moderately high cystine, mithionine, and isoleucine.

While it is rich in proteins, castor cake cannot be used as cattle fodder because of its toxicity.

Energy Content in Castor meal:

The calorific value of deoiled castor cake is about 4200 Kcal per kg. Given the fact that the cost of castor meal/cake is lower than those of other equivalents such as soy meal, rapeseed meal etc., and given its reasonably good energy content, castor meal is today used in some cases as a cost effective fuel. However, the limited quantities in which castor meal is available, and the significant demand that emanates for its use as organic fertilizer implies that the impact of castor meal on the biomass/biofuels industry is insignificant.

Toxicity in Castor meal:

The castor cake is mainly used as a fertilizer. It is unsuitable as an animal feed because of the presence of toxic protein called ricin and toxic allergen often referred to as CBA (castor bean allergen). However, it is noteworthy that none of the toxic components is carried into the oil.