JP2005218981A - Pretreatment method and apparatus for extraction residue occurring from soft drink producing process - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pretreatment method and apparatus of extraction residue capable of improving decomposition efficiency of an organic material and a residue reducing rate in methane fermentation by crushing the extraction residue occurring from soft drink producing process such as coffee grounds and tea grounds so as not to cause a trouble such as clogging. <P>SOLUTION: In the pretreatment method of extraction residue for crushing the extraction residue occurring from soft drink producing process and using the crushed extraction residue for the organic fermentation according to microorganisms such as methane fermentation, the extraction residue 11 is mixed with a diluent 21 and, thereafter, is crushed through coarse crushing 3 and fine crushing 4, particularly the coarse crushing of one time and the fine crushing of one time or more. Therein, the diluent can be selected from one or more of water, industrial waste water, sewage, human waste, cow excreta, hog excreta, excessive sludge produced by treatment thereof, waste drink, excessive raw material produced in soft drink producing process and fermentation residue liquid produced from a fermentation apparatus after crushing or the dewatered and separated liquid. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to pretreatment of extraction residues generated from a soft drink manufacturing process such as coffee cake and tea bowl, and in particular, a pretreatment method for use in organic matter fermentation treatment by microorganisms such as methane fermentation after pulverizing the extraction residue And the apparatus.

Extraction residue generated from the process of producing soft drinks such as coffee cake and teacup can be recovered by reducing the amount of residue and at the same time recovering energy from methane generated by fermentation, etc. by performing fermentation treatment such as methane fermentation. Therefore, it has been attracting attention in recent years.
Extraction residues such as coffee cakes and teacups are fermented after pretreatment such as pulverization, etc., and fermentation reaction rate is faster and organic matter than fermented as it is when it is generated The decomposition rate also increases. Faster fermentation reaction speed can reduce the size of the equipment, and organic matter decomposition rate increases, so the residue reduction rate and energy recovery efficiency improve. It becomes a more efficient fermentation processing system if it is incorporated in the processing.

However, extraction residues such as coffee cakes and teacups have a moisture content of 60% to 80% and thus become paste after pulverization, and remain in the gaps between the pulverization blades or pulverization grinders of the pulverizer or the casing of the pulverizer If it sticks to etc., it will block | close with the apparatus in a grinding | pulverization apparatus or its downstream. In addition, when the gap amount of the grinding blade or grinding grinder of the grinding machine is reduced so as to reach the target grinding particle size by one grinding, the residue may be blocked by the gap. The clogged apparatus is difficult to continue the crushing process unless disassembly and cleaning are performed.
For this reason, a system in which a pulverization process is incorporated as a pretreatment in the fermentation process of extraction residues such as coffee cake and tea bowl has not been put into practical use.
Soft Drink Technical Data / 137 (2002, No. 2) 1-9 (issued by the Japan Beverage Industry Association)

  The present invention has been made in view of the known technology, and the extraction residue generated from the process of producing soft drinks such as coffee cakes and teacups is crushed so as not to cause troubles such as clogging. It is an object of the present invention to provide an extraction residue pretreatment method and apparatus that can improve the organic matter decomposition efficiency and residue reduction rate of organic matter fermentation treatment by microorganisms such as methane fermentation.

In order to solve the above-mentioned problem, in the present invention, in the pretreatment method of the extraction residue for pulverizing the extraction residue generated from the soft drink manufacturing process and using it in the organic matter fermentation treatment with microorganisms, the extraction residue is mixed with a diluent. The extraction residue pretreatment method is characterized by pulverization treatment of coarse pulverization and fine pulverization, preferably, pulverization treatment by one coarse pulverization and one or more fine pulverizations.
In the pretreatment method, the diluent includes water, industrial wastewater, sewage, human waste, cow manure, pig manure, surplus sludge generated by these treatments, waste beverage, surplus raw materials generated in the drinking water production process, after pulverization The fermentation residue liquid generated from the fermentation treatment apparatus and the dehydrated separation liquid thereof can be used, and the amount of the diluted liquid to be mixed varies depending on the type of the diluted liquid, but the water after mixing the residue and the diluted liquid is 85. The amount can be made to be 95% or more.

Further, in the present invention, in an extraction residue pretreatment device for pulverizing an extraction residue generated from a soft drink manufacturing process and using it in an organic matter fermentation treatment with microorganisms, a mixing tank for mixing the extraction residue with a diluent, The extraction residue pretreatment device is characterized by comprising a pulverizer for roughly pulverizing and then finely pulverizing the liquid mixture from the mixing tank.
In the pretreatment device, the pulverizer is used for both coarse pulverization and fine pulverization. In this case, in the coarse pulverization, the gap between the pulverizer blade or the pulverizer grinder is increased, and the residue in the gap is obtained. In the fine pulverization, it is possible to pulverize with a crushing amount of the pulverizer blade or pulverizer grinder according to the target pulverized particle size, and to perform automatic continuous operation, A control mechanism for adjusting the gap amount and the rotational speed of the pulverizing blade or pulverizing grinder of the pulverizer can be provided according to the liquid level condition of the raw material charging hopper provided in the upper part.

  ADVANTAGE OF THE INVENTION According to this invention, the automatic continuous grinding | pulverization process can be carried out without troubles, such as obstruction | occlusion, for the extraction residue generated from the drinking water manufacturing processes, such as a coffee bowl and a tea bowl. By carrying out this pulverization treatment as a pretreatment for organic matter decomposition treatment by microorganisms such as methane fermentation, the waste reduction efficiency in the fermentation treatment of the extraction residue generated from the drinking water production process such as coffee candy, tea candy, etc. The amount of energy recovery efficiency can be improved.

Embodiments of the present invention are shown in FIG. 1 and FIG. FIG. 1 shows a first embodiment, and FIG. 2 shows a second embodiment.
The embodiment of FIG. 1 is an embodiment in which the pulverization operation is divided into a plurality of times of coarse pulverization and fine pulverization. In FIG. 1, an extraction residue 11 and a diluting solution 21 generated from a drinking water production process such as a coffee bowl and a tea bowl are mixed in a mixing tank 1 and coarsely pulverized by a coarse pulverizer 3. The coarsely pulverized coarsely pulverized product is naturally flowed or transferred by a pump and finely pulverized by the fine pulverizer 4. Fine grinding is performed about 1 to 3 times. When the target particle size of the pulverized product is small, it is necessary to reduce the gap between the pulverizer blade or the pulverizer and to increase the resistance during pulverization. Therefore, the mixture is retained in the hopper at the top of the pulverizer. Depending on the type of residue and diluent, solid-liquid separation may occur during residence, and only the residue may accumulate on the bottom of the hopper, causing clogging of the residue in the gap between the pulverizing blade or the pulverizing grinder and continuing the pulverization operation.

However, when the pulverization operation is divided into coarse pulverization and fine pulverization, the gap between the pulverization blade or the pulverization grinder of the coarse pulverizer can be increased to the extent that no clogging occurs and the pulverization operation can be continued. In the fine pulverizer, the coarsely pulverized product is pulverized. However, since the coarsely pulverized product has a particle size that does not cause solid-liquid separation, it does not block even if the gap between the pulverization blade or the pulverization grinder is reduced. . The pulverized pulverized material 14 is transferred to a fermentation treatment apparatus.
The amount of the diluent for pulverization without clogging is somewhat different depending on the type of the diluent, but the amount of water after mixing is required to be 85 to 90% or more. The conditions as the properties of the diluent include fluidity and the absence of components that interfere with microbial fermentation. Specifically, water, industrial wastewater, sewage, human waste, cow manure, pig manure, surplus sludge generated by such treatment, waste juice and waste milk as waste beverages, surplus syrup and the like can be mentioned. Moreover, the fermentation residue liquid which generate | occur | produces from the fermentation processing apparatus after a grinding | pulverization can also be used for a dilution liquid.

The embodiment of FIG. 2 is an embodiment in which an automatic operation control method is added to the embodiment of FIG. In FIG. 2, the extraction residue 11 and the diluent 21 generated from the drinking water production process such as coffee cake and teacup are mixed in the mixing tank 1 and pulverized by the pulverizer 2 or coarsely pulverized by the fine pulverizer 3. Grind with machine 4. The gap amount and the number of rotations of the pulverizing blades or pulverizing grinders of the pulverizers 2, 3, 4 are automatically adjusted so that the upper hopper of the pulverizer does not overflow and does not become empty. The condition of the pulverizer upper hopper is confirmed by the pulverizer upper hopper level signal 31, and the pulverization blade or pulverization grinder gap amount from the control circuit of the control box 5 and the rotation speed instruction signal 32, the gap amount of the pulverization blade or pulverization grinder And set the rotation speed. For example, if the hopper level meter detects a high level, the gap amount and rotation speed of the grinding blade or grinding grinder are increased to increase the grinding processing amount. If a low level is detected, the gap amount and rotation speed are reduced to reduce the grinding processing amount. The control is performed. Further, the gap amount of the grinding blade or grinding grinder is periodically changed by a timer or the like. By making it fluctuate, the blockage of the residue in the gap can be eliminated. Even when the properties and amount of the mixture to be pulverized vary, automatic operation can be realized by adopting the above control method. FIG. 3 shows an outline of the pulverizer. In FIG. 3, reference numeral 41 denotes a pulverizing unit of the pulverizer, 42 denotes an upper charging hopper, and 43 denotes a charging hopper level meter.
The pulverized pulverized material 14 is transferred to a fermentation treatment apparatus.
Further, the amount of the diluted solution and the condition of the properties are the same as in the embodiment of FIG.

Example 1
The tea bowl generated from the soft drink manufacturing process and the wastewater treatment surplus sludge generated from the soft drink factory were mixed and pulverized with a stone mill. The water content of the tea bowl was about 70%, the water content of the wastewater treatment surplus sludge was about 95%, and the moisture content after mixing was about 90%.
As a pulverizer, a stone mill type pulverizer with a diameter of 6 inches was used, and the mixture was put into a hopper top input hopper and processed at a processing speed of about 300 kg / hour. At this time, the rotation speed of the grinder grinder was 1500 rpm, and the crushing process was possible without clogging in the grinder.

When this pulverized product was subjected to methane fermentation using a methane fermentation treatment apparatus, a CODcr decomposition rate as high as 72% was obtained. Usually, both sludge and tea bowl have a COD decomposition rate of 30 to 40%, and this high decomposition rate is due to the pulverization effect.
The results of Example 1 are shown in Table 1.

Example 2
The coffee cake generated from the drinking water production process and the wastewater treatment surplus sludge generated from the drinking water factory were mixed and pulverized with a mill-type pulverizer. The water content of the coffee cake was about 65%, the water content of the wastewater treatment surplus sludge was about 95%, and the moisture content after mixing was about 89%.
For the pulverizer, a two-stage process of coarse pulverization and fine pulverization was performed with a stone mill with a grinder diameter of 6 inches. In the first coarse pulverization, the gap amount of the pulverizer grinder was 300 μm, and in the second fine pulverization, the gap amount of the pulverizer grinder was 100 μm. Both the coarse pulverization and the fine pulverization were put into a hopper upper charging hopper, and processed at a coarse pulverization processing speed of about 400 kg / hour and a fine pulverization processing speed of about 200 kg / hour. At this time, the rotation speed of the grinder grinder was 1500 rpm, and the crushing process was possible without clogging in the grinder.
Furthermore, the mixture is continuously fed into the hopper upper charging hopper, the pulverizer speed is set to 0 mm when the hopper level is low, and the pulverizer speed is set to 1500 rpm when the hopper level is high and continuous operation is performed. Realized.

When this pulverized product was subjected to methane fermentation using a methane fermentation treatment apparatus, a high removal rate of 70% for CODcr decomposition was obtained. Usually, the COD decomposition rate of sludge is 30 to 40%, and the coffee gruel that is not pulverized hardly decomposes, so this high decomposition rate was due to the pulverization effect.
The results of Example 2 are shown in Table 2.

The flow block diagram which shows an example of the preprocessing method of this invention. The flow block diagram which shows the other example of the pre-processing method of this invention. Schematic of the crusher used in FIG.

Explanation of symbols

1: mixing tank, 2: pulverizer, 3: coarse pulverizer, 4: fine pulverizer, 5: control box,
11: Waste of extraction residue generated from a drinking water production process such as coffee cake and tea bowl, 12: mixture, 13: coarsely pulverized product, 14: pulverized product, 21: dilute solution, 31: hopper level input hopper level signal 32: Clearance amount and rotation speed instruction signal of the grinding blade or grinding grinder, 41: grinding unit of the grinding machine, 42: pulverizer upper input hopper, 43: pulverizer upper input hopper level meter

Claims (5)

  In the pretreatment method of the extraction residue for pulverizing the extraction residue generated from the soft drink manufacturing process and using it in the organic matter fermentation treatment with microorganisms, the extraction residue is mixed with a diluent and then pulverized by coarse pulverization and fine pulverization. A pretreatment method for extraction residue, characterized by:   The dilution liquid is generated from water, industrial wastewater, sewage, human waste, cow manure, pig manure, surplus sludge generated by these treatments, waste beverages, surplus raw materials generated in the soft drink manufacturing process, and fermentation processing equipment after pulverization The extraction residue pretreatment method according to claim 1, wherein the extraction residue is selected from one or more of a fermentation residue solution or a dehydrated separation solution thereof.   In an extraction residue pretreatment apparatus for pulverizing an extraction residue generated from a soft drink manufacturing process and using it in an organic matter fermentation treatment with microorganisms, a mixing vessel for mixing the extraction residue with a diluent, and a mixed solution from the mixing vessel A pretreatment device for extraction residue, comprising a pulverizer for coarsely pulverizing and then finely pulverizing.   The extraction residue pretreatment apparatus according to claim 3, wherein the pulverizer can be used for both coarse pulverization and fine pulverization.   The pulverizer has a control mechanism for adjusting a gap amount and a rotation speed of a pulverization blade or a pulverization grinder of the pulverizer according to a liquid level condition of a raw material charging hopper provided at an upper portion of the pulverizer. Item 5. An extraction residue pretreatment apparatus according to Item 3 or 4.

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