What is "vinasse"

Vinasse \Vi*nasse"\, n. [F.] (Chem.) The waste liquor remaining in the process of making beet sugar, -- used in the manufacture of potassium carbonate.

n. (context chemistry English) The waste liquor remaining in the process of making beet sugar, used in the manufacture of potassium carbonate.

Vinasse is a byproduct of the sugar industry. Sugarcane or Sugar beet is processed to produce crystalline sugar, pulp and molasses. The latter are further processed by fermentation to ethanol, ascorbic acid or other products. After the removal of the desired product (alcohol, ascorbic acid, etc.) the remaining material is called vinasse. Vinasse is sold after a partial dehydration and usually has a viscosity comparable to molasses. Commercially offered vinasse comes either from sugar cane and is called cane-vinasse or from sugar beet and is called beet-vinasse.

In the process of distillation of the alcohol and as a result of the heating in the distillation process, in the pulp of the beet reactions of condensation and predominantly molecular ruptures take place. This causes a high fulvic acid concentration in this byproduct. One use of vinasse is in thermophilic digesters. In Brazil thermophilic digester is a source of biogas using pure and hot vinasse as the source of production of methane. In the past, vinasse was a problem in production of ethanol, but vinasse is also a good fertilizer (at least for some time) and a source of methane that can be used to generate heat or electricity. Moreover, other uses of vinasse invonving also the formulation of nutritive solutions for hydroponics, formulation of culture media for plant tissue culture and culture media for algal growth.

Vinasse composition

Ion (mg.L-1)

Pure Vinasse

Treated Vinasse

Cl-

59.4

37.1

SO4-2

1680

1458

Na+

8.6

7.0

K+

1620

1760

Ca+2

3160

1642

Mg+2

162.4

101.8

PO4-3

560

380

NO3-2

-

0.66

NH4+

-

47.65

Fe+2

44.9

27.92

Mn+2

4.9

2.88

Zn+2

1.2

0.75

Treated vinasse is originated by a decantation and filtration process.