JP2003285099A - Treatment method for brewing waste liquid - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a treatment method for a brewing waste liquid for treating the brewing waste liquid certainly and efficiently to obtain dischargeable water and separating a reutilizable component contained in the waste liquid efficiently to reutilize the same. <P>SOLUTION: The treatment method for the brewing waste liquid includes a process for subjecting the brewing waste liquid to solid-liquid separation treatment, a process for filtering the solution separated in the solid-liquid separation process, a process for electrodialyzing the filtered solution to separate an ion component and a process for treating the solution, from which the ion component is separated, with activated sludge. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for treating brewing waste liquor, and more particularly to a method for treating brewing waste liquor suitable for treating waste liquor from a shochu manufacturing process.

[0002]

2. Description of the Related Art A large amount of brewing waste liquor, for example, the liquor discharged from the shochu manufacturing process, contains a solid phase component and also contains amino acids and organic acids such as acetic acid and citric acid as ionic components. It is contained in a high concentration (about 1 to 2%). Conventionally, as a method for treating a large amount of such brewing waste liquid, an effective or accurate treatment method has not yet been developed, and at most, the brewing waste liquid is solid-liquid separated to separate the separated solid phase or liquid. A method of storing the phase as it is, a method of subjecting the liquid phase to activated sludge treatment, and the like are adopted.

However, if it is simply stored, a large amount of waste liquid will be discharged, so that the storage location will soon get stuck. In addition, since only the solid-liquid separation treatment is performed, the liquid phase component still contains a large amount of colloids, polysaccharides, proteins and the like, and as described above, it contains amino acids and organic acids at high concentrations as ionic components. , There is a problem to release it as it is. Therefore, although it will be subjected to activated sludge treatment, etc., even if it is directly subjected to activated sludge treatment,
It is difficult to sufficiently separate and remove the components to be separated as described above, and a remarkably large-sized facility is required as the activated sludge treatment facility. Furthermore, in order to discharge the treated water after the activated sludge treatment, it is necessary to lower the BOD to a sufficiently low value, but it is difficult to lower the BOD sufficiently only by combining the above-mentioned simple steps. . Therefore, the reality is that the water quality for discharge is not sufficiently secured.

[0004]

Therefore, in view of the above-mentioned circumstances, an object of the present invention is to reliably and efficiently treat even the quality of water capable of discharging brewing waste liquid, and to reuse the waste water contained in the waste liquid. Another object of the present invention is to provide a method for treating waste brewing liquid, which enables efficient separation of various components and reuse.

[0005]

In order to solve the above problems, a method for treating a brewing waste liquid according to the present invention comprises a step of solid-liquid separating the brewing waste liquid, and a solution separated by the solid-liquid separation step. The method comprises a step, a step of electrodialyzing the solution after filtration to separate an ionic component, and a step of treating the solution from which the ionic component has been separated with activated sludge.

This method for treating waste brewing liquid further comprises adjusting the water content of the solid phase component separated in the solid-liquid separation step (for example, after adding a water content adjusting agent), and then performing the electrodialysis on the solid phase component. You may have the process of mixing the ionic component isolate | separated by the process. Further, it may have a step of drying the mixture of the ionic component and the solid phase component. For drying, spray drying treatment or the like may be applied. Since the dried mixture contains the components such as amino acids in a concentrated form, it can be reused as a raw material of feed for livestock, for example.

Further, the treatment method of the brewing waste liquid may further have a step of diluting the solution from which the ionic components have been separated by the electrodialysis step when the activated sludge is treated. Due to dilution, B of treated water before activated sludge treatment
The OD value can be appropriately reduced, and the activated sludge treatment can be performed more effectively. As the diluting liquid, the treatment liquid from the activated sludge treatment process can be used for at least a part thereof, thereby providing an efficient treatment system. Since the BOD value of the treated water after the activated sludge treatment can be lowered to a sufficiently low value, the treated water can be discharged without causing a problem.

In the method for treating a brewing waste liquid according to the present invention as described above, the brewing waste liquid discharged from the brewing process is directly transferred to the waste liquid treatment factory by a transfer line or is transported to a waste liquid treatment factory by a transportation means to form a solid-liquid solution. It is supplied to the separation step and separated into a solid phase and a liquid phase. The separated liquid phase solution is first supplied to the filtration step, and by filtration, such as the colloidal component, the polysaccharide component and the protein component in the solution,
Components that could not be removed in the solid-liquid separation step are removed.
The filtered solution from which these components have been removed is supplied to the electrodialysis step, where the ionic components in the solution are dialyzed and separated by electrodialysis. This ionic component contains reusable components such as amino acids and organic acids such as acetic acid and citric acid. The solution from which the ionic components have been separated and removed is
It is sent to the activated sludge treatment process and used for activated sludge treatment.

In the solution treatment after the above series of solid-liquid separation, the BOD of the solution is lowered by separating and removing the colloidal components and the like by filtration, and then the BOD of the solution is further lowered by separating and removing the ionic components by electrodialysis. ,further,
The activated sludge treatment further lowers the BOD, and finally, treated water having a sufficiently low BOD value that can be discharged is obtained. If diluted before the activated sludge treatment, treated water having a desired BOD value can be obtained more quickly and efficiently. And BOD
The activated sludge treated water whose value has been sufficiently reduced can be discharged without causing any problems. Further, since this series of treatments can be performed as a continuous treatment, efficient continuous treatment can be performed even for a large amount of waste liquid by installing and operating equipment suitable for it. .

On the other hand, the solid phase after the solid-liquid separation can be directly subjected to a treatment such as drying, or the ionic component separated by the electrodialysis after stirring the water content can be stirred and It is also possible to mix and reuse the ionic components. When reusing the ionic components,
The mixture of the solid phase and the ionic component may be dried to provide a form that is easy to use. Particularly, a dry mixture containing amino acids and the like can be reused as a raw material for feed for livestock. Therefore, the method of the present invention makes it possible to efficiently separate and reuse the reusable components contained in the waste liquid.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a process flow of a method for treating brewery waste liquid according to an embodiment of the present invention. In FIG. 1, reference numeral 1 indicates a brewing waste liquid discharged from the shochu manufacturing process or the like (for example, 100
brewing waste liquid of t), for example, by the hot charge car 2,
Transported to the brewery waste liquid treatment plant 3. During transportation, it is possible to partially evaporate the water while ensuring ventilation.

In the brewery waste liquid treatment factory 3, first, the liquid is supplied to a solid-liquid separation step 4 by a solid-liquid separation device. In the solid-liquid separation step 4, the solid phase 5 (for example, 10t) and the liquid phase 6 (for example, 90t) are separated. The separated solution of the liquid phase 6 is usually 80, in the case of brewing waste liquid from the shochu manufacturing process.
A BOD value of about 000 ppm is shown.

The solid-liquid separated solution is then supplied to the filtration step 7. In addition to sand filtration, filtration using a precision filter, ultrafiltration and the like can be applied to the filtration. The filtration mainly removes the colloidal component, the polysaccharide component, the protein component, etc. in the solution that could not be separated and removed in the solid-liquid separation step 4. The solution after filtration from which these components have been removed exhibits a BOD value of, for example, about 40,000 ppm.

The solution after filtration is supplied to the electrodialysis step 8, and the ionic component 9, for example, the amino component and the organic acid component such as acetic acid and citric acid are dialyzed and removed by electrodialysis (removal amount: For example, 10t). Before this electrodialysis,
Since the colloidal components and the like have been removed in advance in the filtration step 7, it is possible to prevent foreign matter from adhering to the electrodialysis surface,
The electrodialysis treatment is performed smoothly and efficiently. Amino acid components are usually 1 to 1 in the case of brewing waste liquid from the shochu manufacturing process.
Although it is contained in about 2%, it is extracted from the solution with extremely high accuracy by electrodialysis. The solution from which the ionic component 9 has been removed exhibits a BOD value of about 30,000 ppm, for example.

In the present embodiment, the solution from which the ionic components 9 have been removed is then diluted in the dilution step 10 and the diluted solution is supplied to the activated sludge treatment step 11. In the illustrated example, the BOD value after dilution is about 3 times and the BOD value after dilution is 10,000.
It is set to about 0 ppm. In the activated sludge treatment step 11, well-known activated sludge treatment equipment for high-concentration organic waste liquid, for example, treatment equipment provided with a photosynthetic bacteria tank, an aeration tank, a sedimentation tank, a sludge decomposition tank and the like can be used. Since it is diluted in advance, it enables rapid and efficient treatment of activated sludge, and the BOD value of the treated liquid after activated sludge treatment can be easily adjusted to 30p or less.
It can be about pm or even lower.

Such a solution having a low BOD value can be discharged as a treated water into a river or the like without causing a problem (discharge step 12). In the illustrated example, about 80 ton of processing liquid is discharged. Since the BOD value of the treated liquid after the activated sludge treatment can be suppressed to an extremely low value in this way, the treated liquid after the activated sludge treatment can be used as at least a part of the solution dilution liquid before the activated sludge treatment. . By using the treatment liquid for dilution, it is possible to reduce the amount of separately prepared diluting liquid, improve the efficiency of the entire system, and reduce the operating cost.

As is clear from FIG. 1, the series of solution treatments as described above are capable of substantially continuous treatment from solid-liquid separation to discharge. The continuous treatment makes it possible to smoothly and efficiently treat a large amount of waste liquid.

On the other hand, in the present embodiment, the water content adjusting agent 13 (5 t in the illustrated example) is added to the solid phase component 5 (10 t in the illustrated example) separated in the solid-liquid separation step 4 to adjust the water content. The solid phase component 5 is stirred and mixed with the ionic component 9 separated by the electrodialysis in the electrodialysis step 8 described above (stirring / mixing step 14). In this stirring and mixing,
It is preferable to adjust the pH to, for example, about pH 6 to 7 rather than neutral or slightly acidic. By this mixing, the mixture contains a reusable component such as an amino acid or an organic acid in a relatively high concentration.

Such a mixture can be reused for various purposes, for example, as a feed material for livestock, if necessary. In this embodiment, the mixture is dried (drying step 15) in order to make it in a form that is easy to reuse. By drying, about 11 tons of the feed raw material 16 is obtained in this embodiment.

As described above, in the method for treating a brewing waste liquid according to the present invention, the solution after solid-liquid separation can be efficiently treated before it can be discharged as a treatment liquid, and the solid phase component is also effectively utilized for solution treatment. The reusable components derived from can be smoothly collected in a reusable form, and an extremely efficient system with no waste as a whole can be obtained.

[0021]

As described above, according to the method for treating a brewing waste liquid of the present invention, it is possible to reliably and efficiently treat the quality of water that can discharge the brewing waste liquid, and to reuse the waste water contained in the waste liquid. Various components can be separated and collected efficiently,
It can be reused if necessary. Especially when applied to the waste liquid treatment from the shochu manufacturing process where a large amount of brewing waste liquid is discharged, it enables continuous smooth processing that could not be done before and even reuses wasteful discarded active ingredients. It will be possible.

[Brief description of drawings]

FIG. 1 is a process flow diagram of a brewing waste liquid treatment method according to an embodiment of the present invention.

[Explanation of symbols]

1 brewing waste liquid 2 Hot charge car 3 Brewing waste liquid treatment plant 4 Solid-liquid separation process 5 Solid phase (component) 6 Liquid phase (component) 7 Filtration process 8 electrodialysis process 9 ion components 10 Dilution process 11 Activated sludge treatment process 12 Release process 13 Moisture conditioner 14 Stirring / mixing process 15 Drying process 16 Feed ingredients

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) C02F 9/00 502 C02F 9/00 502L 503C 503 504A 504 C12F 3/10 C12F 3/10 C02F 1/46 103 F-term (reference) 4B028 AC06 AG03 AP11 AP13 AP17 AP30 4D006 GA17 KA02 KA52 KA55 KA57 KA71 KB15 KB22 PA04 PB08 PB25 PC12 4D028 AB03 BA00 4D059 AA03 AA07 BD05 BE00 BE49 FA22 FB09 FA13 FA09 FA13 FA09 FB09 FA09 FB07

Claims (6)

[Claims] 1. A step of solid-liquid separating the brewing waste liquid, a step of filtering the solution separated by the solid-liquid separating step, a step of electrodialyzing the filtered solution to separate an ionic component, and a separation of an ionic component A method for treating brewing waste liquid, comprising the step of treating the solution with activated sludge. 2. A step of adjusting the water content of the solid phase component separated in the solid-liquid separation step, and then mixing the solid phase component with the ionic component separated in the electrodialysis step,
The method for treating brewing waste liquid according to claim 1. 3. The method for treating brewing waste liquid according to claim 2, further comprising the step of drying the mixture of the ionic component and the solid phase component. 4. The method for treating brewery waste liquid according to claim 1, further comprising a step of diluting the solution from which the ionic components have been separated by the electrodialysis step when the activated sludge is treated. 5. The method for treating brewing waste liquid according to claim 4, wherein the treatment liquid from the activated sludge treatment step is used as at least a part of the diluting liquid. 6. The method for treating brewery waste liquid according to claim 1, wherein the treatment liquid from the activated sludge treatment step is discharged.