Method for obtaining useful products from green pseudostem, including papermaking pulp plantain

A method for obtaining useful products, including pulp for papermaking, from green plantain pseudostem, comprising the steps of:

• compressing the green plantain pseudostem to obtain a liquid as a first useful product which contains amino acids, starch, and organic salts useful as plant food and fertilizer and partially defluidized plantain pseudostem;
• beating the partially defluidized plantain pseudostem with water to convert the same into a fine slurry;
• squeezing the fine slurry to obtain additional first useful liquid product and fibrous material formed of plantain pseudostem;
• subjecting the fibrous plantain pseudostem material to a depithing treatment to obtain depithed fine mesh fibers and parenchyma pith cells separated therefrom, the pith cells constituting a second useful product;
• mixing the depithed fine mesh fibers with an alkaline solution to obtain a slurry mass of fine mesh fibers and subjecting the slurry mass to a steam cooking treatment to dissolve lignin and other soluble substances contained therein to obtain a cooked mass,
• separating the fine mesh fibers from the liquid of the cooked mass to obtain a black liquor as a third useful product;
• beating the fine mesh fibers with a bleach solution to obtain a fine mesh partially bleached pulp slurry;
• squeezing the fine mesh slurry to separate additional black liquor from at least partially bleached fine mesh fibers of alpha cellulose;
• depithing the alpha cellulose;
• and
• kneading the bleached alpha cellulose to strengthen and give the pulp a smooth, soft texture to thereby obtain substantially pure alpha cellulose pulp for papermaking as a fourth useful product.