JP2008086883A - Treatment method and treated product of white distilled liquor distillation waste liquid - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a treatment method of allowing a white distilled liquor distillation waste liquid to be easily made useful and a treated product. <P>SOLUTION: The treatment method of the white distilled liquor distillation waste liquid comprises loading the white distilled liquor distillation waste liquid with calcined lime. The treatment method of the white distilled liquor distillation waste liquid and the treated product preferably comprise loading 100 mass parts of the white distilled liquor distillation waste liquid with 30 to 300 mass parts of calcined lime, thereby allowing the white distilled liquor distillation waste liquid to be powdered and also deodorized. Since the main component of the treated product obtained by the treatment method is calcium hydroxide (slaked lime), the treated product can be used for an alternate raw material of a calcium compound, particularly slaked lime, calcined lime or calcium carbonate. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to a method for treating a shochu distillation waste liquid and a treated product thereof, and more particularly, to a treatment method for making a shochu distillate waste liquid useful and a treated product of a useful shochu distillate waste liquid.

  In the production of shochu, shochu distillate waste liquor called shochu distiller, shochu waste liquor, etc. is generated. In general, the amount of shochu distillate waste reaches twice the production volume. Moreover, due to the recent shochu boom, the amount of generation tends to increase, and effective processing is desired. However, this shochu-distilled waste liquid has a severe odor, high moisture content (90% to 97%), high concentration of BOD, SS, etc. compared to general waste water, and contains a large amount of fine plant fibers. It is a waste liquid that is difficult to separate into solid and liquid.

  Methods for making this shochu distillate waste liquor useful have been tried in the past, such as, for example, a method of making shochu distillate waste as it is or composting it into a fertilizer, or a method of making it as a feed, a feed after being concentrated and dried by plant treatment There are known methods such as non-patent literature 1, patent literature 1, patent literature 2, patent literature 3 and patents, for example, a method of wastewater treatment by combining an anaerobic treatment method and an activated sludge method. Reference 4).

  However, the method of converting shochu distilled liquor into feed or fertilizer as it is has bad odor and is prone to spoilage in summer, and the same problem occurs when composting into fertilizer. Also, the amount of feed and fertilizer used is limited. On the other hand, methods such as feed conversion by plant treatment, incineration treatment, and wastewater treatment that combines the anaerobic treatment method and activated sludge method are expensive to construct and maintain large-scale plants, and are implemented by small and medium-sized shochu manufacturers. It is hard to do.

For this reason, out of approximately 330,000 tons of shochu distillation wastewater generated in fiscal 2003 (brewing year: July 1 to June 30 of the following year) in Kagoshima Prefecture, where the production of oyster shochu is the best in Japan. At least 100,000 tons of shochu distillation waste liquid is put into the ocean. Until now, it was considered as an unpolluted organic matter derived from nature, etc., and it was accepted as an exception item in the “Convention on the Prevention of Marine Pollution of Waste and Others” (commonly known as the “London Convention”). Due to the stricter regulations, legal regulations that make it very difficult to enter the ocean in the near future are scheduled. For this reason, a method for treating shochu-distilled waste liquid that is not based on conventional methods is eagerly desired.
Kagoshima Prefectural Industrial Technology Center report “Research and Development and Current Situation of Disposal of Shochu Distillery”, May 2005, pp. 1-4 JP 2005-131582 A JP 2000-157182 A JP-A-11-57794 JP 2001-310197 A

  This invention solves the said conventional problem about the process of shochu-distilled waste liquid, and it aims at providing the processing method which makes shochu-distilled waste liquid mineralized easily and effectively, and its processed material.

The present invention relates to a method for treating shochu-distilled waste solution and a treated product of shochu-distilled waste solution that have solved the above-described problems with the configuration described below.
(1) A method for treating a shochu distillation waste liquid, comprising adding quick lime to the shochu distillation waste liquid.
(2) The processing method of the shochu-distilled waste liquid as described in said (1) which adds 30-300 mass parts of quicklime with respect to 100 mass parts of shochu-distilled waste liquid.
(3) The method for treating a shochu-distilled waste liquid as described in (1) or (2) above, wherein quick lime is added to the shochu-distilled waste liquid to powder the shochu-distilled waste liquid.
(4) The processing method of the shochu-distilled waste liquid described in any one of (1) to (3) above, wherein quick lime is added to the shochu-distilled waste liquid to deodorize the shochu-distilled waste liquid.
(5) A processed product of shochu distillation waste liquid produced by the treatment method described in any one of (1) to (4) above.

  Shochu distillation waste liquid is a highly water-containing product with a moisture content of 90% or more, but when quick lime is added to it, water evaporates due to the heat generated by the hydration reaction, and a large amount of water is added when quick lime changes to slaked lime. Since it absorbs, dehydration proceeds, and it changes from a slurry to a paste according to the amount of quicklime added, and becomes powdery when the amount of quicklime added increases. Moreover, since it is deodorized simultaneously, it becomes very easy to handle. Moreover, since it is mainly composed of slaked lime and does not contain heavy metals, it can be easily reused.

  The treatment method of the present invention only needs to add quick lime to the shochu distillation waste liquor and does not require a large-scale plant, so it can be easily implemented even by small and medium shochu manufacturers. Moreover, since the main component of the processed material obtained by the processing method of this invention is calcium hydroxide (slaked lime), it can be used as a substitute raw material of a calcium compound, especially slaked lime, quick lime, or calcium carbonate.

Hereinafter, the present invention will be specifically described with examples.
The processing method of this invention is a processing method of the shochu-distilled waste liquid characterized by adding quicklime to a shochu-distilled waste liquid. In addition, in the following description, what added quick lime to the shochu distillation waste liquid is called processed material.

  The kind of shochu distillation waste liquid used in the present invention is not limited. The present invention can be applied to distillation waste liquids using various raw materials such as waste shochu distillation waste liquid, wheat shochu distillation waste liquid, rice shochu distillation waste liquid, buckwheat shochu distillation waste liquid, brown sugar shochu distillation waste liquid, and Awamori shochu distillation waste liquid.

  Examples of the quicklime used in the present invention include hard calcined quicklime and soft calcined quicklime. When adding quick lime to shochu distillation waste liquid in batch mode, if hard calcined quick lime is used as quick lime, the hydration reaction occurs relatively slowly and the temperature of the processed product is unlikely to rise rapidly. Can be more. On the other hand, it is preferable to use medium calcined lime or soft calcined lime as quick lime because the hydration reaction occurs relatively quickly and the treatment time can be shortened.

  What is necessary is just to select suitably the baking degree of a quick lime, a particle size, the addition amount of quick lime, etc. according to the kind, magnitude | size, number of processing apparatuses, and the processing speed (processing amount per unit time). In addition, the type, size, number, and processing speed of the processing apparatus may be appropriately selected according to the calcining degree of quicklime, the particle size, the amount of quicklime added, and the like.

  The amount of quicklime added is preferably 30 to 300 parts by weight with respect to 100 parts by weight of the shochu distillation waste liquid. If it is less than 30 parts by mass, the amount of water in the shochu distillation waste liquid is large, so that the resulting slurry concentration is thin, and a drying process and equipment are further required to remove the water. On the other hand, when the amount of quicklime added exceeds 300 parts by mass, a part of the quicklime remains without hydration reaction, and depending on the storage conditions during storage, heat may be generated due to moisture supplied from the surroundings, and the storage container may be damaged by heat. There is.

  The amount of quicklime added is preferably 50 to 200 parts by weight with respect to 100 parts by weight of the shochu distillation waste liquid. By adding 50 parts by mass or more of quicklime, the processed product can be pulverized, so that the processed product can be easily handled. Also, if the amount of quicklime added is 200 parts by mass or less, there is little or no unreacted quicklime, and depending on the storage conditions during storage, heat may be generated due to moisture supplied from the surroundings and the storage container may be damaged by heat. Little or no. The addition amount of quick lime is more preferably 50 to 150 parts by weight with respect to 100 parts by weight of the shochu distillation waste liquid. If the amount of quicklime added is 150 parts by mass or less, the treated product will have adequate adhering moisture, so that it is difficult for dust to be generated during processing, transportation, use, etc., and the processing equipment can be made smaller. Storage space for things and raw materials can be reduced.

  The apparatus which implements the processing method of this invention should just be able to add quick lime to a shochu distillation waste liquid, and a type, a magnitude | size, etc. are not limited. For example, an apparatus capable of continuously adding a predetermined amount of quick lime to the shochu distillation waste liquid may be used, or an apparatus capable of adding a predetermined amount of quick lime to the shochu distillation waste liquid in a batch type may be used. As a device that can continuously add a predetermined amount of quick lime to the shochu distillation waste liquid, for example, a continuous concrete mixer, a device equipped with a spray device for spraying and adding a predetermined amount of shochu distillation waste liquid to a quick lime belt conveyor, for quick lime Examples include an apparatus equipped with a spraying device for spraying and adding a predetermined amount of shochu distillation waste liquid to the transport pipe. The batch type equipment that can add a certain amount of quicklime to the shochu distillation waste liquid includes bread type concrete mixer, pug mill type concrete mixer, gravity concrete mixer, Henschel type mixer, ribbon mixer, jet mixer, truck agitator, etc. It is done.

  In addition, in the said implementation apparatus, the apparatus which has mixing means, such as a concrete mixer, is preferable so that quick lime and shochu distillation waste liquid may be mixed uniformly. Moreover, the implementation apparatus of this invention is good also as a mobile apparatus which mounted the mixer, the meter, the pump for shochu distillation waste liquid supply, the lime hopper, the control panel, etc. on the vehicle bodies, such as a truck.

  According to the treatment method of the present invention, by adding quick lime to the shochu distillation waste liquor, the moisture and quick lime contained in the shochu distillation waste liquor is about 95% by mass while generating heat to produce calcium hydroxide (slaked lime). . Due to the heat generated at this time, the water in the shochu distillation waste liquid evaporates and the water is further taken in by the slaked lime. The state of the processed material changes from a slurry to a paste according to the amount of quicklime added, and becomes powdery when the amount of quicklime added increases.

  The treated product of the present invention is obtained by adding quick lime to shochu distillation waste liquid and is a strong alkaline substance mainly composed of slaked lime. In addition, this treated product is deodorized and is easy to handle because the odor of the shochu-distilled waste liquid which is a raw material is largely removed. In particular, the handling property is further improved by making the treated product into a powder form, and the odor is almost the same as that of slaked lime.

Furthermore, since the main component of the treated product of the present invention is calcium hydroxide, it can be used as an alternative raw material for calcium compounds, particularly slaked lime, quicklime or calcium carbonate (limestone). Incidentally, the temperature at which calcium hydroxide becomes calcium oxide is about 450 ° C., and is considerably lower than the temperature at which calcium carbonate becomes calcium oxide, which is about 900 ° C. Therefore, when the treated product of the present invention is used as an alternative raw material for calcium carbonate, It is preferable because the fuel cost is low and the amount of generated CO ₂ can be reduced.

  Conventional methods for treating shochu-distilled waste liquid are mainly methods of using this as organic resource materials such as feed and fertilizer, or methods of incineration. In order to use it as feed or fertilizer, it is limited to treatment methods for retaining nutrient components and fertilizer components, and there is a problem that malodor cannot be sufficiently removed. Therefore, the processed product obtained by the present invention is mainly made of slaked lime. For example, cement, concrete admixtures such as cement, expansion material and quick setting agent, static crushing agent, solidifying material It can be used as a raw material for fertilizers, feeds, desulfurization agents and the like.

[Example 1]
50 ml of shochu distillation waste liquid was put into an evaporating dish having a diameter of about 15 cm, a predetermined amount of quick lime was added with stirring, and further mixed with a spatula for 3 minutes. The shochu distillation waste liquid used was the one generated during the production of shochu shochu (water content 97% by weight, brown turbid liquid, with a unique odor), and quick lime was soft calcined lime (particle size: Blaine specific surface area 4000 cm ² / g). The test was conducted by changing the amount of quicklime added to the shochu distillation waste liquid. Table 1 shows the maximum temperature of the treated product according to the amount of quicklime added, the state of dust generation during the treatment, and the properties of the treated product.

  In all the test levels, water vapor was generated within a few seconds from the start of quick lime charging. It was visually confirmed that water vapor was vigorously generated for 1 to 2 minutes from the start of the charging, and that water vapor was continuously generated for several minutes thereafter.

  Furthermore, the amount of adhering water and the constituent minerals were examined for the processed products at each test level. The analysis results are shown in Table 2. The adhering moisture is expressed as a percentage by putting the treated product immediately after completion of kneading in a thermostat at 105 ° C. for 24 hours, dividing the mass change before and after that by the mass of the treated product immediately after finishing kneading. In addition, the constituent minerals were analyzed by a powder X-ray diffractometer after removing adhering moisture in a constant temperature bath at 105 ° C. The ignition loss (ig.loss) is a value at 1000 ° C. The other chemical components are values obtained by fluorescent X-ray analysis of the processed product after measuring the loss on ignition.

  As shown in Table 2, only the calcium hydroxide peak could be confirmed in any of the processed products of test levels No. 1 to No. 6. Considering the measurement results of the chemical components together, it was confirmed that the main component of the processed products of test levels No. 1 to No. 6 was calcium hydroxide. When the constituent minerals are similarly analyzed for the processed products of test levels No. 7 to No. 9, in addition to the calcium hydroxide peak, a calcium oxide peak can also be confirmed, and unreacted quicklime remains in the processed product. It was confirmed.

  From the results of Table 2, it can be seen that the amount of quicklime added is suitably 30 to 300 parts by mass and preferably 50 to 200 parts by mass with respect to 100 parts by mass of the shochu distillation waste liquid. The processed product added with 30 to 150 parts by weight of quick lime changes the total amount of quick lime to slaked lime, the one added with 30 parts by weight becomes powdery after 24 hours, and the one with 50 parts by weight added is treated with powder immediately after kneading. Products are obtained, and the generation of dust during processing is small. On the other hand, when 200 parts by mass or more of quicklime is added, unreacted quicklime remains, and the dust during the treatment is intense. When the amount exceeds 300 parts by mass, the maximum temperature of the processed product becomes considerably high.

  The deodorizing effect of the processed product of Example 1 was examined. The test method performed the sensory (odor) test by 10 monitors (AJ) about the processed material of test level No.1, No.4, No.5, No.7. The evaluation criteria were determined by a 10-step evaluation in which the odor of shochu distillation waste liquid was 10 and the odor of slaked lime (special grade product) was 0. The test results are shown in Table 3. As shown in Table 3, all of the processed products of the present invention have greatly reduced malodor, and test level No. 7 has been deodorized to an odor close to slaked lime.

[Example 2]
The shochu-distilled waste liquid was put into a 100-liter pan-type mortar mixer, and a predetermined amount of quick lime was added while stirring, and further mixed for 15 minutes. When the temperature of the processed product dropped to about 50 ° C., the processed product was transferred to a flexible container and stored. The shochu distillation waste liquid used was the one generated during the production of shochu shochu (water content 97 mass%, brown turbid liquid, with a unique odor), and the soft lime was soft calcined lime (particle size: sieved product with 3 mm openings). The test was conducted by changing the amount of quicklime added to the shochu distillation waste liquid. Table 4 shows the state of dust generation during treatment according to the amount of quicklime added and the properties of the treated product.

  In any test level of No. 10 to No. 13, water vapor was generated within a few seconds from the start of quicklime input. Water vapor was vigorously generated for 1 to 2 minutes from the start of charging, and water vapor was continuously generated over 10 minutes thereafter. The maximum temperature of the processed material at the time of processing was about 103 ° C. in all levels.

  Furthermore, the amount of adhering water and the constituent minerals were examined for the processed products at each test level. The analysis results are shown in Table 4. The adhering moisture is expressed as a percentage by putting the treated product immediately after completion of kneading in a thermostat at 105 ° C. for 24 hours, dividing the mass change before and after that by the mass of the treated product immediately after finishing kneading. In addition, the constituent minerals were analyzed by a powder X-ray diffractometer after removing adhering moisture in a constant temperature bath at 105 ° C.

  As shown in Table 4, only the calcium hydroxide peak could be confirmed in any of the processed products of test levels No. 10 to No. 13. Considering that the results of measurement of chemical components of each processed product at the test level after heating to 1000 ° C. were 96.6% by mass to 96.8% by mass on the basis of loss on ignition. Then, it was confirmed that the main component of this treated product was calcium hydroxide. In addition, the odor of the treated product is considerably suppressed compared with the waste liquor before treatment, and the odor of the treated product after being stored in a flexible container for 2 weeks is almost the same as the odor of commercially available slaked lime. It was about.

[Example 3]
Using the processed product of test level No. 13, the pulverized product mixed and pulverized with the composition shown in Table 5 was heated in an electric furnace at 1450 ° C. for 60 minutes and then rapidly cooled. Dihydrate gypsum was added to the sintered product, and brain-browned. Ordinary Portland cement was prepared by grinding to a specific surface area of 3300 cm ² / g. In addition to the treated material, silica stone, bangshale shale, iron oxide, and dihydrate gypsum were used.

To 100 parts by mass of the produced cement, 300 parts by mass of silica sand and 12.5 parts by mass of water are placed in a Hobart mixer (model: N-50) and mixed for 4 minutes. Standard (JIS R 5201 “Physical test of cement” A mortar was prepared according to the method ")". The compressive strength of this mortar was measured at the age of 3 days, 7 days and 28 days. As a result, compressive strength, respectively ^{27.8N / mm 2, 43.5N / mm} 2, a 59.4N / mm ^2, were comparable to the case of using a conventional cement.

[Example 4]
Cement by using the processed product of test level No. 13, mixed and pulverized with the composition shown in Table 6, heated in an electric furnace at 1450 ° C. for 60 minutes, rapidly cooled, and pulverized to a Blaine specific surface area of 2300 cm ² / g with a ball mill. An admixture was prepared. In addition to the treated material, silica stone, van earth shale, iron oxide, and anhydrous gypsum were used.

  A cement composition was prepared by mixing 7 parts by mass of the prepared cement admixture, 93 parts by mass of ordinary Portland cement, and 300 parts by mass of ISO standard sand using a plastic bag. 12.5 parts by mass of water was added to 100 parts by mass of the cement composition and kneaded to prepare a mortar. The expansion rate of the produced mortar was measured according to the standard (JIS A 6202 “Expanding material for concrete” Annex 2) at the age of 7 days. As a result, since the expansion rate of the produced mortar was 0.108%, it was confirmed that the produced cement admixture was suitable as an expansion material for concrete.

[Example 5]
Using a processed product of test level No. 13, the pulverized product mixed and pulverized with the composition shown in Table 7 was baked in a rotary kiln having a baking temperature of 1450 ° C. and cooled, and then the sintered ingot was subjected to a Blaine specific surface area of 2300 cm ² / g with a ball mill. A cement admixture was made by grinding. In addition to the treated material, quicklime, quartzite, van earth shale, iron oxide, and anhydrous gypsum were used.

  A cement composition was prepared by mixing 7 parts by mass of the prepared cement admixture, 93 parts by mass of ordinary Portland cement, and 300 parts by mass of ISO standard sand using a plastic bag. 12.5 parts by mass of water was added to 100 parts by mass of the cement composition and kneaded to prepare a mortar. The expansion rate of the produced mortar was measured according to the standard (JIS A 6202 “Expanding material for concrete” Annex 2) at the age of 7 days. As a result, since the expansion rate of the produced mortar was 0.125%, it was confirmed that the produced cement admixture was suitable as an expansion material for concrete.

  According to the treatment method of the present invention, by converting the shochu distillation waste liquid into an inorganic material, the shochu distillation waste liquid that has been disposed of as waste can be more easily treated than before. Moreover, since the processed product manufactured by the processing method of the present invention is mainly composed of slaked lime, cement, concrete admixture such as cement, expansion material and quick setting agent, static crushing agent, solidifying material, fertilizer, feed Since it can be suitably used as a raw material such as a desulfurizing agent and can be used in a wide range of fields, a larger amount of shochu distillation waste liquid than before can be made useful.

Claims (5)

A method for treating shochu distillation waste liquid, comprising adding quick lime to the shochu distillation waste liquid.
The processing method of the shochu-distilled waste liquid of Claim 1 which adds 30-300 mass parts of quick lime with respect to 100 mass parts of shochu-distilled waste liquid.
The processing method of the shochu-distilled waste liquid of Claim 1 or Claim 2 which adds quick lime to a shochu-distilled waste liquid, and pulverizes this shochu-distilled waste liquid.
The processing method of the shochu-distilled waste liquid in any one of Claims 1-3 which adds a quick lime to a shochu-distilled waste liquid, and deodorizes this shochu-distilled waste liquid.
Processed product of the shochu distillation waste liquid produced by the processing method according to claim 1.