JPS63156585A - Method and device for controlling development of rancidity from waste perishables - Google Patents

Abstract

PURPOSE:To control the development of rancidity from a pile of waste perishables before being burned, by mixing activated carbon into the waste perishables. CONSTITUTION:A hopper 1 for receiving waste perishables, a waste perishables discharge mechanism 2 connected to the bottom opening of the receiving hopper 1, an activated carbon hopper 3 for supplying activated carbon to the waste perishables traveling in the discharge mechanism 2 provided midway of the discharge mechanism 2, and a quantitative feeder 4 for activated carbon provided at the bottom opening of the hopper 3 are furnished. A fixed amt. of activated carbon is mixed into the waste perishables traveling in the discharged mechanism 2 from the activated carbon feeder 3, and the waste is discharged to the outside of the system. As a result, the development of rancidity from a pile of waste perishables before being burned can be controlled.

Description

[Detailed Description of the Invention] [Industrial Application Field 1] The present invention is applicable to large amounts of food waste generated from home kitchens, hotels, restaurant businesses, etc., and fresh waste such as shellfish removed from marine structures submerged in the sea. This article relates to a method for suppressing odors generated from waste piles and a device for carrying out the method.If applied to a fresh waste dump, the emission of bad odors generated from the piles can be suppressed and odor pollution can be prevented. This has the effect of preventing accidents and improving the living environment in the surrounding area.

[Prior Art] In factories located along the coastline, large quantities of seawater are sometimes used as cooling water for heat exchange within the factory. In such cases, the cooling seawater is taken in through the water intake that opens toward the seawater, but there are shellfish such as purple shellfish and barnacles near the water intake and on the inner walls of the seawater passage. adhere to. When they multiply, they form a layer and cover the inner walls of the passage, making the seawater passage narrower, or their carcasses peel off and block the pipes of various facilities such as the factory heat exchanger. A situation arises where it is put away.

To solve this problem, divers periodically dive into the seawater passageway to remove shellfish and temporarily pile them up on the ground.

Once the shellfish piled up in the open are gathered to a certain extent, they are transported to an incinerator and incinerated. During this time, the shellfish rot and a strong odor of decay is emitted from the piled pile, which is harmful to the surrounding life. harm the environment;

Conventionally, in order to deal with the occurrence of such bad odors, the above-mentioned deposits were sprinkled with a masking agent that emits an aroma, or the odors were collected with a hood, etc., and the collected air was deodorized with deodorizing equipment at the rear, and then the collected air was released into the atmosphere. Something was being done. However, the former method does not produce any significant effects, and the latter method requires significant capital investment.

[Problems to be Solved by the Invention] An object of the present invention is to provide a method and an apparatus for suppressing putrid odors generated from perishable waste during accumulation up to incineration.

[Means for Solving the Problems] The present invention has been made as a result of intensive studies in order to solve the above problems. Therefore, the gist of the first invention is to mix activated carbon into perishable waste. Further, a second invention is an apparatus used for carrying out this method, which comprises a receiving hopper into which perishable waste is thrown, a perishable waste discharge mechanism connected to the bottom opening of the receiving hopper, and the discharge mechanism. The discharge mechanism installed in the middle of the discharge mechanism is equipped with an activated carbon hopper that supplies activated carbon to the perishable waste that is being moved within the premises, and an activated carbon quantitative cutting device that is installed at the bottom opening of the hopper. The gist of this device is to suppress the odor generated from perishable waste by mixing a certain amount of activated carbon into the perishable waste from an activated carbon hopper and discharging it outside the system.

To briefly explain the present invention, the activated carbon used in the present invention is made from carbon sources such as coconut shells, coal, or wood;
There is no particular limitation, and any type of activated carbon may be used as long as it is a so-called normal activated carbon in which micropores are developed after activation by adding water vapor or a chemical or the like.

In addition, activated carbon is powdered charcoal (usually 100 mesh passes is 80
% or more) and granular charcoal, both of which can be applied. In addition, if iron powder is mixed into activated carbon, the oxidizability of iron will decompose odor components such as hydrogen sulfide, which are normally difficult to adsorb and remove with activated carbon, making it possible to suppress odor generation more effectively. good.

Examples of perishable waste subject to odor control include shellfish removed at seawater intakes, but the waste is not limited to this, and waste generated at food manufacturing plants and household kitchens and It goes without saying that the present invention is also applicable to so-called raw garbage generated from the kitchens of restaurants, hotels, and restaurants.

Next, an apparatus for implementing the method of the present invention will be explained based on FIG. 1 showing an example thereof.

In Fig. 1, reference numeral 1 denotes a receiving hopper into which perishable waste is input, and this input may be carried out directly by an operator using a shovel or the like, but it may also be carried out via a porta-pull belt conveyor, etc. (not shown). . 2 is a perishable waste discharge mechanism connected to the bottom opening of the receiving hopper 1, and is for discharging the waste in the receiving hopper 1 to the outside of the system. In the example shown in FIG. 1, a screw conveyor is installed as the discharge mechanism, but the present invention is not limited to this, and other conveying means such as a belt conveyor may be used. The discharge mechanism 2 is inclined or attached so as to rise toward the discharge port 5, but this is done in order to minimize the area in which the deposits 6 of treated waste falling from the discharge port 5 accumulate. This is to make it possible to stack them up to a height of . The shaft 7 of the screw conveyor in the discharge mechanism 2 is rotated by a drive device 8 coaxially provided at the rear of the discharge mechanism 2 . The variable speed machine is a variable speed machine that slows down the rotation of the drive device 8 at a preset rate.

An activated carbon hopper 3 is connected to the middle of the discharge mechanism 2 via a quantitative cutting device 4 provided at the bottom opening of the hopper 3. That is, the hopper 3 is loaded with activated carbon, and a preset amount of activated carbon is added to and mixed with the perishable waste being transported.

Reference numeral 10 denotes wheels provided at the bottom of the pedestal 11, and the wheels 10 allow the device of the present invention to be freely moved to any desired location.

The apparatus of the present invention has the above-described configuration, and the perishable waste put into the receiving hopper 1 moves in the discharge mechanism 2 in the direction of the discharge port 5 in a preset amount, but on the way, A required amount of activated carbon that acts as an odor adsorbent is supplied and mixed from an activated carbon hopper 3 via a quantitative cut-out device 4, and thereafter, the perishable waste moves through the discharge mechanism 2 in a state where its surface is coated with activated carbon. It is discharged from the system through the discharge port 5 and becomes a deposit 6.

[Function] Since the present invention has the above-described configuration, the perishable waste put into the receiving hopper moves within the discharge mechanism, and during the movement, it is removed from the activated carbon hopper via the quantitative cutting device. of activated carbon is supplied, the waste and activated carbon are mixed while moving, and are discharged from the system through the exhaust port.

In this way, the perishable waste is uniformly mixed with the activated carbon, so the malodorous odor components generated from the waste are adsorbed by the activated carbon, and volatilization of the odor is suppressed.

[Examples] Next, the present invention will be described with reference to Examples, but the present invention is not limited to the following Examples unless it exceeds the gist thereof. The ``%'' in the text represents Utatan%.

Example 1 400 gr of commercially available live clams as a sample
This was divided into 200g portions, powdered activated carbon was added to one portion at a rate of 10% of the sample, and activated carbon was not added to one portion, and each portion was sealed in a 2Q glass container. The activated carbon used at this time was Diasorb F100D (activated carbon manufactured by Sankyo Sangyo Co., Ltd., trade name), and its physical properties were as follows.

Particle size 100 mesh pass 99% Moisture 6.2% Iodine adsorption power 1100mM +; , the concentrations of the main odor components were measured. The odor components were measured using a gas detector set (product number: 850 shoulder bag type) manufactured by Gastic Co., Ltd. with a direct connection to a gas detector tube. The results are shown in Table 1.

As is clear from the results shown in Table 1, there is no difference between the two cases regarding ammonia, but the emission of trimethylamine is significantly suppressed when activated carbon is added compared to when activated carbon is not added. Also, among the three odor components mentioned above,
Regarding methyl mercaptan, which is the most intense odor component, when activated carbon is not added, the emission is 1.6 ppm, but when activated carbon is added, the emission is suppressed to an undetectable level. For example, it can be seen that there is an effect of suppressing the generation of odor. When I actually smelled the odors of both, I found that the one without activated carbon had a strong putrid odor that was unbearable to smell, but the one with activated carbon had an amine odor similar to that of tsukudani. Although the window was slightly broken, it was not an unpleasant odor.

Example 2 The same activated carbon as used in Example 1 was added to the activated carbon-added sample after being left sealed for 3 days as shown in Example 1 at 1% of the sample.
4% and 5% (total 10%) were added sequentially, and the odor components generated at that time were measured in the same manner as in Example 1.The measurements were carried out one hour after each addition. In addition, when adding 1% and 4%, the sample and activated carbon were mixed by stirring with a glass rod, but when adding 5%, the activated carbon was placed in a glass container. After charging, the container was sealed and the corner of the container was photographed for several minutes.The results are shown in Table 2.

As is clear from the results in Table 2 and above, for perishable waste,
It can be seen that the addition of 1% activated carbon sufficiently suppresses the odor generation, and that the suppressing effect does not change even if more is added.

In addition, when adding 5% additionally, the concentrations of trimethylamine and ammonia increased even though the total activated carbon usage was as high as 10%. This is thought to be due to the odor components that had built up in the waste leaking out all at once. This can be said to suggest that intensive mixing of perishable waste and activated carbon is rather inappropriate in the actual application of the present invention.

Example 3 As a sample, purple mussels that grew near the water intake of a waterfront factory were collected and used. Divide this into 4 sets of 200Cl each and charge each set into a 2Q glass container. Except for 1 set, the other 3 sets are filled with powdered activated carbon, 2 granular activated carbon dioxide, or iron powder as shown in Table 3. They were added and mixed under the conditions shown in the addition conditions section. Thereafter, the glass container was sealed and left for 11 days.

The powdered activated carbon used at this time was the same activated carbon used in Example 1, and the granular activated carbon was Diasorb W1.
0-30 (activated carbon manufactured by Sankyo Sangyo Co., Ltd., trade name), and its physical properties are as follows.

Grain If Range of 10 to 32 mesh 96.0% moisture
2.0% ml"7 elemental adsorption power 1050 mO/Clr methylene blue decolorizing power 160 mff/gr As for the iron powder, commercially available iron powder was used.

After leaving the sealed sample at room temperature (approximately 20'C) for 11 days,
The gas in the glass container was sampled and the degree of 'a' of the main odor components was measured. The measurement method was the same as in Example 1. The measurement results are shown in Table 3.

Table 3 As can be seen from this table, in case 1, in which activated carbon is not added, each odor component is at a fairly high concentration, whereas in case activated carbon and iron are added and mixed in advance, activated carbon It can be seen that the concentrations of all odor components are lower than in the case without additives. What is particularly noteworthy is that when iron powder in Case 2 is used, hydrogen sulfide is suppressed to a low concentration that is undetectable. In addition, case 3 added powdered charcoal, and Case 4 added granular charcoal. These are the results of a test conducted to see the difference in the effects of powdered charcoal, granular charcoal, and charcoal, but there is no numerically large difference when comparing the two. It can be seen that both powdered charcoal and granular charcoal have an odor generation suppressing effect.

Example 4 Next, activated carbon and iron powder were added to each sample used in Example 3 under the conditions shown in the addition conditions section of Table 4, and the glass container was sealed for 1 hour. Afterwards, the concentration of each odor component was measured.

The measurement results are shown in Table 4. Note that the case numbers correspond to those of the third embodiment.

Table 4 As can be seen from this table, the addition of activated carbon and iron has a fast effect on odor control, as well as powdered charcoal, granular charcoal,
It can be seen that if Iron King is used in combination (Case 2), the effect is even greater.

[Effect of the invention 1] As described above, the present invention allows malodor components generated from perishable waste to be adsorbed to activated carbon and suppresses its release, so even if stored in the open for a certain period of time, it will not cause malodor pollution. It is preventable and helps improve the environment.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway side view of an example of the device of the present invention. 1...Accepting hopper 2...Discharge of perishable waste is a matter of concern. 3...Activated carbon hopper

Claims (1)

[Claims] 1. A method for suppressing odors generated from perishable waste, which comprises mixing activated carbon into perishable waste. 2. The method for suppressing odors generated from fresh waste according to claim 1, wherein the activated carbon is powdered activated carbon and/or granular activated carbon. 3. A method for suppressing odors generated from fresh waste according to claim 1, wherein the activated carbon is mixed with iron. 4. A receiving hopper into which perishable waste is input, a perishable waste discharge mechanism connected to the bottom opening of the receiving hopper, and an activated carbon supplying activated carbon to the perishable waste moving within the discharge mechanism provided in the middle of the discharge mechanism. It is equipped with a hopper and an activated carbon quantitative cutting device provided at the bottom opening of the hopper, and is configured to mix a certain amount of activated carbon into the perishable waste moving within the discharge mechanism from the activated carbon hopper and discharge it out of the system. A device for suppressing odors generated from perishable waste, characterized by: