JPH09187774A - Method for processing high concentration distillation waste liquid accompanied with producing alcohols - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method wherein solid-liq. separation of a high concn. distillation waste liq. is easily performed and the concn. of soluble org. substances is decreased and even when conventional methods for activated sludge processing and anaerobic processing are performed, concn. of org. substances and suspended materials are low and the vol. of the apparatus is made small and the construction cost is made extremely inexpensive. SOLUTION: An appropriate amt. of sodium alginate is incorporated in a high concn. distillation waste liq. accompanied with producing alcohols and by mixing forcibly the mixture, the sodium alginate soln. is uniformly reacted with the distillation waste liq. and an appropriate calcium soln. is added thereto little by little and the mixture is stirred and mixed at a low speed and an appropriate amt. of chitosan soln. is incorporated into the mixed liq. and it is stirred and mixed at a low speed to make the high concn. distillation waste liq. into a water-insoluble gel and as a result, by forming a water soln. and the water-insoluble gel, solid-liq. separation can be easily performed. In addition, by decreasing the concn. of org. substances and suspended materials, the vol. of the apparatus can be remarkably decreased to a physical or biological processing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the treatment of high-concentration distillation waste liquor associated with the production of alcohols, which is a problem when disposing of the distillation waste liquor discharged from various shochu, whiskey, brandy, and other manufacturing processes. By facilitating solid-liquid separation of turbid organic matter, solid matter contained in high-concentration distillation waste liquid,
It is an invention of an extremely effective means for lowering the concentration of soluble organic substances and easily treating high-concentration distillation waste liquor associated with alcohol production, and the solid-liquid separated residue is a coagulant and safe as a food additive. Since the approved sodium alginate and chitosan are used, it can be effectively used as feed.

[0002]

2. Description of the Related Art Conventionally, as a treatment of a high-concentration distillation waste liquid accompanying the production of alcohols, a biological treatment by an activated sludge treatment method, an anaerobic treatment method, etc. has been suitable, and as a pretreatment thereof, a membrane separation, Centrifugal separation, belt separation, etc. are used,
The high-concentration distillation waste liquor accompanying the production of alcohols is characterized by a high solid concentration and a high soluble organic substance concentration, and the conventional treatment methods often hinder the treatment. Further, in order to improve the solid-liquid separation property of the distillation waste liquid, a method for treating the waste liquid by facilitating solid-liquid separation by culturing yeast of the genus Aspergillus in the distillation waste liquid, and a yeast (Trichosporon.
(M111 strain), the culture solution is added to and mixed with the distillation waste liquid to agglomerate the cellulosic solids contained in the distillation waste liquid, facilitating solid-liquid separation of the distillation waste liquid and biologically treating the separated waste liquid. Has been done.

[0003]

When the high-concentration distillation waste liquid accompanying the production of alcohols is directly subjected to biological treatment,
In the conventional activated sludge treatment method and anaerobic treatment method, the organic matter concentration and the suspended matter concentration are high, so the equipment capacity is large, the construction cost is extremely high, and skilled operation technology is required. For culturing, a waste liquid that becomes a medium, or a solid-liquid separated filtrate needs a sterilization step to remove contaminants in advance, and it takes about 24 to 74 hours to cultivate yeast. Specialized technicians for culturing are required, especially in small and medium-sized enterprises, construction costs and management personnel are problems.

[0004] Therefore, at present, the treatment of high-concentration distillate waste liquid associated with the production of various alcohols involves the reduction of fields and the dumping into the ocean, which leads to global environmental pollution such as offensive odors, groundwater pollution, and marine pollution. From the standpoint of course, this is a problem that should be avoided. Therefore, it is desired to establish a technique for easily and highly efficiently treating a high-concentration distillation waste liquid accompanying the production of alcohols.

[0005]

According to the present invention, when an aqueous solution of sodium alginate, which is approved for use as a food additive, is acidified with hydrochloric acid, sulfuric acid, etc., sodium is liberated to form alginic acid, which is a peculiar jelly-like precipitate. And again
Taking advantage of the characteristic that spherical calcium alginate gel beads are formed when an appropriate concentration of sodium alginate aqueous solution is dropped into a calcium solution, and the specificity of organic matter and suspension of high-concentration distillation waste liquid accompanying alcohol production is utilized,
Add an appropriate amount of sodium alginate solution suitable for the liquid state of various distillation waste liquids and force mix to make sodium alginate homogenize to the liquid to be treated, and add an appropriate amount of calcium solution little by little to the mixed liquid to be treated. Stir to mix the organic matter and suspension into a sol, add and mix an appropriate amount of chitosan solution to form a water-insoluble gel, and separate the aqueous solution and the water-insoluble gel.

The treatment liquid of the high-concentration distillation waste liquid is separated into an aqueous solution and a water-insoluble gel, and solid-liquid separation of the aqueous solution and the water-insoluble gel can be performed by any conventionally known method. In the present invention, however, the aqueous solution and the water-insoluble gel are separated. Since the gel is completely separated, solid-liquid separation is easy, and solid-liquid separation can be easily performed using a belt / filter press having a pore size of 20 μm or less, a metal porous plate, or the like.

The distillation waste liquid separated according to the present invention has a suspension of 0.
Since it contains only 2%, the load on the biological treatment equipment for post-treatment is reduced, the treatment equipment construction cost is reduced, the operation management is simple, and no professional technicians are required. Becomes

The solid matter separated in the present invention serves as a coagulant,
Since sodium alginate and chitosan, which are approved as food additives, are used, they can be effectively used as feed.

[0009]

EXAMPLES Examples of the present invention will be described below with reference to Examples, but it goes without saying that the scope of the present invention is not limited to the Examples.

[0011]

[Example 1] According to an experiment, a 1% sodium alginate solution was added to a high-concentration distillation waste liquid produced by alcohol production in a volume ratio of 1
5-40% is added, and the mixture is forcibly mixed to homogenize the high-concentration distillation waste liquid and the sodium alginate solution to perform ionic crosslinking, and a calcium chloride 7% solution is added to the sodium alginate solution at a volume ratio of 20%. After uniformly mixing and forming a sol, add 4 to 7% by volume of chitosan 0.5% solution little by little in volume ratio of high-concentration distillation waste liquid and mix and stir at low speed to mix organic matter and suspension in water To form a gel
Suction filtration was performed with 20 μm filter paper.

[0012]

[Table 1]

As shown in [Table 2], the separation efficiency and the separated liquid quality are far superior to those of the yeast and centrifugal separation treatments that are currently performed.

[0013]

[Table 1]

[Table 2]

Embodiment 2

The separated liquid separated in Example 1 was used as a yeast (Hansenu).
yeast was treated with La anomala J224 strain).

[0014]

As shown in [Table 3], Aspergillus (Aspergi)
It is not so different from the treated solution treated with yeast in the genus Llus).

[0015]

[Table 3]

[0016]

EFFECTS OF THE INVENTION By using the method for treating high-concentration distillation waste liquor accompanying the production of alcohols according to the present invention, solid-liquid separation of high-concentration distillation waste liquor can be easily carried out, the concentration of soluble organic substances is lowered, and Even when the sludge treatment method or the anaerobic treatment method is used, the concentration of organic substances and suspensions is low, and the equipment capacity is small, resulting in extremely low construction costs.

Further, the sterilization process of the medium and the culture time in the yeast treatment method do not require a specialized engineer, which is suitable for treating high-concentration distillation waste liquid in small and medium-sized enterprises.

Since the high-concentration distillation waste liquid is processed on the same day,
The separated solid matter can be effectively used as a feed for animal husbandry and the like, and it is possible to prevent global odor pollution such as bad odor, pollution of groundwater, and marine pollution due to high-concentration distillation waste liquid accompanying alcohol production.

Claims (2)

[Claims] 1. An appropriate amount of sodium alginate solution is added to high-concentration distillation waste liquid and forced mixing to homogenize the liquid to be treated and the sodium alginate solution, an appropriate amount of calcium solution is added little by little, and the mixture is stirred at low speed. After that, an appropriate amount of chitosan solution is added and mixed to form a water-insoluble gel to separate solid-liquid. 2. An appropriate amount of sodium alginate solution is added to the high-concentration distillation waste liquor and forcedly mixed to homogenize the liquid to be treated and the sodium alginate solution, an appropriate amount of calcium solution is added little by little, and the mixture is stirred at a low speed. A method of forming a water-insoluble gel and separating solid and liquid.