JPH0857462A - Method and apparatus for separating and treating shell meat and sheet of organic solid such as shellfish or the like - Google Patents

Abstract

PURPOSE: To efficiently separate and treat shell meat and shell of a shellfish by immers ing a shellfish in an aq. soln. containing an anaerobic bacteria group to liquefy shell meat as monomeric org. matter and decomposing the monomeric org. matter to meth ane gas by methane fermentation bacteria to convert the same to inorg. matter. CONSTITUTION: An org. solid being matter to be treated, for example, a shellfish is preliminarily charged in a basket box 2 along with its shell to be thrown in a treatment tank 1 and the treatment tank 1 is hermentically closed by a lid. At first, an aq. soln. containing at least an anaerobic bacteria group is injected into the treatment tank 1 so as to perfectly immerse the shellfish in the aq. soln. That is, anaerobic fermentation is started and shell meat is converted to lower fatty acids by an acid forming bacteria group to be liquefied. Next, the org. acids generated in the preceding process are decomposed to gas such as CH3 or CO2 by a methane bacteria group to be made inorg. in a gas forming process. At this time, the aq. soln. containing the anaerobic bacteria group and the shellfish are uniformly stirred by a stirring means 9 and heated to the optimum temp. by a heating pipe 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for treating organic solids such as shellfish, and more specifically, water intake equipment for factories, business establishments, etc. that use seawater such as power plants, steel plants, chemical plants or aquaculture plants. , Or a method of separating and processing the shellfish and shellfish collected by removing shellfish such as mussels, oysters, barnacles, etc. that occur in parts that come into direct contact with seawater, such as equipment related to estuaries, and its It relates to the device.

[0002]

2. Description of the Related Art Seawater organisms such as shellfish and algae are very prone to breed in the water intake facility, estuary dam-related facilities, etc., and a device for contacting seawater with the narrowing of the water intake channel due to the large amount of their attachment. It has caused a condition that deteriorates the performance of the kind. For this reason, the marine organisms are regularly removed from the deposits, but especially the shellfish that are collected with it are
It is either landfilled or incinerated. However,
When landfilling, there is a problem that there is a limit to the landfill site and that it emits a very unpleasant odor.On the other hand, when incinerating, the amount of waste is very large, and it must be treated in a short period of time. Since the incinerator must be large, the initial cost and running cost will be high, and the incinerator will have a long life due to the presence of salt in the shellfish and the mixture of shell solids. There are drawbacks such as shortening and generation of a large amount of incinerated ash.

[0003]

The problem to be solved by the present invention is to liquefy organic solids such as shellfish by the action of anaerobic microorganisms and decompose them into gases such as methane gas, carbon dioxide gas, hydrogen sulfide, etc. The object of the present invention is to provide a method for separating and treating shellfish meat and shellfish by shellification, and an apparatus therefor.

[0004]

In order to solve the above-mentioned problems, a method for separating and treating shell meat and shells of an organic solid such as shellfish of the present invention, and an apparatus therefor are organic solid such as shellfish. The treatment tank which is immersed in an aqueous solution containing at least anaerobic microorganisms in an atmosphere that is isolated from the outside air, and the contact between the organic solid matter and the aqueous solution containing the anaerobic microorganisms is favorably promoted in the treatment tank for anaerobic digestion. And a heater for heating to an optimum temperature for liquefying the shellfish in the organic solids such as shellfish and an aqueous solution containing the anaerobic microorganisms, and the organic solids in the treatment tank. The shellfish in the product is liquefied by the action of anaerobic microorganisms, and the liquid is methane gas,
Characterized by decomposing into carbon dioxide gas, hydrogen sulfide, etc. gas to be mineralized, and immersing organic solid matter such as shellfish in an aqueous solution containing at least anaerobic microorganisms in an atmosphere isolated from the outside air. By heating them and liquefying the shellfish in the organic solid matter by the action of anaerobic microorganisms, decomposing it into gas such as methane gas, carbon dioxide gas, hydrogen sulfide, etc. and mineralizing it, shellfish of organic solid matter such as shellfish It is configured to separate and process meat and shells.

The stirring means supports the basket box on the cage frame and rotates the cage frame on a wheel provided in the processing tank to stir the shellfish in the cage box. A stirring blade is provided on the cage frame, and the cage frame is rotated to stir the aqueous solution containing the anaerobic microorganisms in the treatment tank, and the aqueous solution containing the anaerobic microorganisms and the organic solid matter such as shellfish inside the cage. It includes a mode that makes good contact with and promotes anaerobic digestion.

[0006]

According to the method for separating and treating the shellfish meat and shellfish of the shellfish constructed as described above, and the apparatus therefor, an organic solid substance such as shellfish is thrown into an aqueous solution containing at least an anaerobic microorganism group. Then, heat them in an atmosphere isolated from the outside air, liquefy the shellfish in the organic solids by the action of anaerobic microorganisms, and decompose them into gases such as methane gas, carbon dioxide gas, hydrogen sulfide, etc. to make them inorganic. Since it was made into a landfill, there is no restriction on the landfill site, the problem of giving off an unpleasant odor is solved, and even if compared with conventional incineration disposal, it does not depend on the amount of disposal. , Continuous treatment is possible throughout the year, initial cost and running cost are drastically reduced, a large amount of incinerated ash is not generated, and the separated shellfish solids are in a very clean state. Rather, it feeds, and can even be used as calcium source such as fertilizer.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Detailed features of the present invention will be described with reference to embodiments shown in the accompanying drawings. In FIG. 1, shellfish and shellfish, which are organic solids such as shellfish of the present invention, are liquefied by the action of anaerobic microorganisms, and further liquefied into methane gas, carbon dioxide gas, hydrogen sulfide, etc. by the action of methane-fermenting bacteria. The basic configuration of a separation and treatment device that decomposes and mineralizes is shown. In the figure, reference numeral 1 is a treatment in which shellfish etc. 3 are immersed in an aqueous solution containing at least anaerobic microorganisms in an atmosphere in which the shellfish 3 is shielded from the outside air. The tank is shown. The treatment tank 1 is used for both processes of liquefaction, fermentation and washing, and has a lid 5 at the top for making the inside of the treatment tank shut off from the outside air, and at the bottom for the anaerobic condition. Heating tube 1 for heating to an optimum temperature for liquefying and gasifying an aqueous solution containing microorganisms and shellfish meat
0, and a stirring means 9 for contacting the shellfish and the like with the aqueous solution containing the anaerobic microorganisms so that the anaerobic digestion can be favorably promoted in the treatment tank. In the vicinity of the bottom portion, there is provided a slat-shaped receiving stand 4 for receiving a basket, a net, or a cloth bag containing shellfish or the like, or a cage 2 made of them. The shape of the bottom of the processing tank is funnel-shaped, and the slurry withdrawing nozzle is provided at the bottom of the funnel. The inside of the treatment tank 1 may be a single space, but preferably, as shown in the figure, a plurality of treatment compartments are defined by partition walls, and shells are prepared by a cage box 2 prepared to be fitted into the treatment compartments. The function is improved by performing equal charging, separation treatment, and cleaning and unloading of shellfish after separation for each treatment section.

Reference numeral 6 is a desulfurizer for removing sulfur from the gas extracted from the top of the processing tank 1, 7 is a gas storage tank for storing the gas after desulfurization (mainly methane gas), and 8 is gas stirring in the gas storage tank. A blower for blowing air toward the means 9 and stirring the gas in the tank, 11 is a crane for loading and unloading a cage box containing shellfish in the processing tank, and 12 is a cage for shaking shellfish in the cage box by vibrating the cage box. A shaker for favorably promoting washing, 13 is a hot water boiler for applying the optimum temperature for liquefying and gasifying shellfish, 14 is a thermometer for measuring the liquid temperature of an aqueous solution containing anaerobic microorganisms, Reference numeral 15 is a PH meter for measuring the hydrogen ion concentration of an aqueous solution containing anaerobic microorganisms, 16 is an ORP meter for measuring the redox potential of the aqueous solution, 17 is a COD meter for measuring the organic matter temperature of the aqueous solution, and 18 is aerobic activated sludge. Treatment tank, 1
9 is a blower for the aeration tank, 20 is an air diffuser for the aeration tank, 21 is a settling tank, 22 is an anaerobic excess sludge tank, and 23 is a dehydrator for dehydrating the anaerobic excess sludge to form a cake and discarding it. is there.

Next, the process for separating and treating the shell and the meat of organic solid such as shellfish will be described. A shellfish or the like to be treated is put in a cage 2 with a shell, and is put into the treatment tank 1, and the upper portion of the treatment tank is sealed with a lid 5 through a packing, and then an aqueous solution containing at least an anaerobic microorganism group. Is injected so that the shellfish is completely immersed. This starts anaerobic fermentation. The shellfish in this example is put into the processing tank 1 with the shell shell still attached, but it is also possible to crush the shellfish and put it in. In this case, it is necessary to consider the shape of the cage and the size of the mesh.

The organic solid matter constituting shellfish passes through substances having a small molecular weight such as monosaccharides and amino acids due to the action of probiotic bacteria contained in an aqueous solution containing anaerobic microorganisms at an early stage, It is converted to lower fatty acids such as acetic acid, propionic acid, butyric acid, and valeric acid, and liquefied. Next, in the gas generation process, the organic acids generated in the previous process are decomposed by a group of methane bacteria having a strong substrate specificity, and decomposed into gas such as CH ₄ and CO ₂ . In this way, the organic acids that make up shellfish are converted to organic heat, decomposed into methane gas and carbon dioxide gas, and proliferate as some bacterial cells. It is decomposed into methane gas and carbon dioxide gas by methane bacteria, and as a whole, it is in the direction of decreasing and mineralization progresses. In this way, the shellfish is reduced in volume and mineralized to solve the problem of unpleasant odor.

Anaerobic fermentation of shellfish and the like is carried out without necessarily being put in the cage 2, but in terms of handling, separation,
From the standpoint of processing adjustment, it is extremely advantageous to put them in a cage and to provide a plurality of processing sections so that duplicate processing can be performed. Further, in the anaerobic fermentation, the heating tube 10 is operated to heat the aqueous solution containing the anaerobic microorganisms and shellfish such as shellfish to the optimum temperature for liquefying and gasifying, and the stirring means 9 is used. Good anaerobic digestion is carried out in this treatment tank by activating and increasing the contact between the two. The heat source of the hot water boiler 13 may be any of gas, heavy oil, electricity, etc., but it is economical to apply methane gas generated by anaerobic fermentation. Stirring means 9
It is needless to say that the same result can be obtained not only by the above-mentioned gas stirring but also mechanically as shown in FIG.

FIG. 2 shows a mechanical stirring means. The basket box in this example is different from the one described above,
A net, a cloth bag, or a cage made of them is rotated in the treatment tank to stir the shellfish in the cage, or at the same time, a stirring blade provided on the outer circumference of the cage is used to By stirring the aqueous solution containing the anaerobic microorganisms, the contact between the aqueous solution containing the anaerobic microorganisms and the organic solids such as shellfish inside the cage is improved, and anaerobic digestion is promoted. , 91 are cage frames that support the cylindrical cage 92 and rotate on the rolling wheels, 93 is a lid of the cylindrical cage, 94 is a rolling wheel, and 95 is a stirring blade. The shellfish 3 includes a cylindrical cage lid 93 to a cage frame 91.
It is placed in a cylindrical basket 92 supported by the processing tank 1 as it is.
Accommodated inside. In the processing tank, at least one of them is a driven wheel 94, for example, a chain 97.
Driven by an electric motor 96 via the motor, a cage frame 91 is mounted on the cage frame 91, and rotates here together with the cylindrical cage 92. Along with the rotation, the shellfish in the cylindrical cage 92 are stirred, and at the same time, the stirring blade 95 provided on the outer circumference of the cage stirs the aqueous solution containing the anaerobic microorganisms in the treatment tank,
The contact between the aqueous solution containing the group of anaerobic microorganisms and the organic solid matter such as shellfish inside the cylindrical basket 92 is improved to promote anaerobic digestion.

A PH meter 15 and an ORP are provided in the processing tank 1.
A total of 16 electrode parts are attached, and a PH value and an oxidation-reduction potential in an aqueous solution containing an anaerobic microorganism group are measured to confirm the progress status of fermentation. Then, the flesh is liquefied and anaerobic fermentation
Whether the digestion is completed is confirmed by the COD meter 17. The aqueous solution containing the anaerobic microorganisms group that has undergone anaerobic fermentation / digestion is withdrawn from the upper part of the treatment tank 1 toward the secondary treatment equipment for aerobic treatment, and purified by these treatment equipment to below the discharge regulation value, Recycle as wash water or dilution water for treatment system or discharge to the ocean.

Next, the aerobic secondary processing will be described. Since the COD and BOD of the aqueous solution containing the group of anaerobic microorganisms which have been subjected to the anaerobic fermentation / digestion sent to the aerobic activated sludge treatment tank 18 are treated up to several hundred ppm,
Its concentration is much higher than the emission control value, and it is necessary to combine the process of decomposing organic substances. The method for decomposing organic matter includes a standard activated sludge method, a catalytic oxidation method, a sprinkling filter method, a rotating disk method, and the like, and any of them may be used.
Preferably, air is sent from the aeration tank air diffuser 20 into the aerobic activated sludge treatment tank 18 by the aeration tank blower 19 so that microorganisms in the aerobic activated sludge absorb oxygen in the air to remove organic matter. A method of oxidative decomposition is preferable. According to this, it is possible to return the final treated water to the treatment tank 1 and use it for washing the shell as described above, or to use it as diluting water for aerobic treatment, so that the water can be effectively used. The aeration tank liquid is continuously guided to the settling tank 21 to settle and separate the activated sludge. Then, the supernatant water is recycled as washing water or dilution water for the treatment system as described above, or is discharged to the ocean. At the same time, most of the settled activated sludge is returned to the aerobic activated sludge treatment tank 18 as return sludge, and the other is stored in the anaerobic excess sludge tank 22 as excess sludge. When excessive sludge is generated, the sludge is dehydrated by the dehydrator 23 to be solid (cake) and disposed.

The shells left in the treatment tank 1 are washed with the final treated water or fresh water because the anaerobic fermentation / digested aqueous solution remains attached to their surfaces. For cleaning, the treatment tank 1 is used as it is as a cleaning tank, the final treated water or fresh water is flown into the tank, and the stirring means 9 is operated to perform air stirring. This agitation
The basket box 2 may be slightly lifted by the crane 11 and the vibrator 12 may be driven to apply vibration to the basket box to accelerate cleaning. The washed shell is lifted together with the cage 2 by the crane 11 to remove water, and then taken out of the treatment tank 1.

[0016]

The present invention has the following effects. 1. According to the method for separating and treating the shellfish meat and shellfish of shellfish configured as described above, and according to the apparatus, an organic solid substance such as shellfish is put and immersed in an aqueous solution containing at least an anaerobic microorganism group, And heat them in an atmosphere that is shut off, liquefy the shellfish in the organic solid by the action of anaerobic microorganisms, decompose it into a gas such as methane gas, carbon dioxide gas, hydrogen sulfide, etc. to reduce the volume and mineralize it. Because it was done like this,
The problem of giving off an unpleasant odor is solved without being restricted by the landfill site. 2. Compared with conventional incineration disposal, it is possible to treat continuously throughout the year without being affected by the amount of treatment, dramatically reducing initial costs and running costs, and generating a large amount of incinerated ash. Needless to say, the separated shell solid matter is in a very clean state and can be utilized as a source of calcium for feed, fertilizer and the like. 3. While defining the inside of the processing tank into multiple processing compartments,
Providing a cage box to be fitted in the treatment compartment, charging of organic solids such as shellfish, separation treatment, and washing of shellfish after separation,
Since it is possible to carry out each processing section, it is easy to operate, and shellfish etc. that are intermittently landed can be separated and processed in a cycle without waste throughout the year, Along with this, it is possible to make an ideal system with high cost performance. 4. According to claims 4 to 5, the basket box is supported on the basket frame, and the basket frame is rotated on a wheel provided in the processing tank circle to stir the shellfish in the basket box. A stirring blade is provided on the frame to stir the aqueous solution containing the anaerobic microorganisms,
By making good contact with organic solids such as shellfish inside the cage and promoting anaerobic digestion, liquefaction and gasification of shellfish can be effectively promoted, and the cycle time of separation and treatment can be improved. It can be shortened.

[Brief description of drawings]

FIG. 1 is an explanatory view of an apparatus for separating and treating shell meat and shells of the present invention.

2A and 2B are explanatory views showing a mechanical stirring means, FIG. 2A shows a central cross section, and FIG. 2B shows a cross section of a cylindrical basket portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Treatment container 2 ... Basket 3 ... Shellfish 4 ... Receiving stand 5 ... Lid 6 ... Desulfurizer 7 ... Gas storage tank 8 ... Blower 9 ... Stirring means 10 ... Heating pipe 11 ... Crane 12 ... Exciter 13 ... Hot water Boiler 14 ... Thermometer 15 ... PH meter 16 ... ORP meter 17 ... COD meter 18 ... Aerobic activated sludge treatment tank 19 ... Aerator air blower 20 ... Aeration tank diffuser 21 ... Settling tank 22 ... Anaerobic excess sludge tank 23 ... Dewatering machine 91 ... Basket frame 92 ... Cylindrical cage 93 ... Cylindrical cage lid 94 ... Rolling wheel 95 ... Stirring blade 96 ... Electric motor 97 ... Chain

Claims (5)

[Claims] 1. An organic solid substance such as a shellfish is thrown into an aqueous solution containing at least an anaerobic microorganism group, and the shell meat in the organic solid substance is treated with an anaerobic microorganism to produce a low molecular weight product in an atmosphere shielded from the outside air. It is liquefied by making it an organic substance, and further, it is decomposed into methane gas, carbon dioxide gas, hydrogen sulfide and other gases by the action of methane-fermenting bacteria and mineralized to separate organic solids such as shellfish from shellfish and shells. , How to handle. 2. A treatment tank in which an organic solid matter such as shellfish is immersed in an aqueous solution containing at least an anaerobic microorganism group in an atmosphere shielded from the outside air, and an aqueous solution containing the organic solid matter such as shellfish and an anaerobic microorganism group. A stirring means for favorably promoting anaerobic digestion in the treatment tank, and an optimum temperature for liquefying and gasifying shell meat in an aqueous solution containing the anaerobic microorganisms and organic solids such as shellfish It consists of a heater to heat
Organic solids such as shellfish characterized by liquefying shell meat in the treatment tank by the action of anaerobic microorganisms and decomposing the liquid into gases such as methane gas, carbon dioxide gas and hydrogen sulfide to be mineralized A device that separates and processes the seafood and shells of. 3. The inside of the treatment tank is divided into a plurality of treatment compartments, and a basket box fitted in the treatment compartments is provided to charge organic solids such as shellfish, separation treatment, and shells after separation. 3. An apparatus for separating and treating shellfish and shellfish of an organic solid such as shellfish according to claim 2, wherein the washing and carrying out of the above can be carried out for each treatment section. 4. The cage is supported by the cage frame, and the cage frame is rotated on a rolling wheel provided in the treatment tank to agitate the organic solid matter such as shellfish inside the cage to be anaerobic. An apparatus for separating and treating shellfish and shells of organic solid matter such as shellfish according to any one of claims 2 and 3, which is arranged to make good contact with an aqueous solution containing a microorganism group. 5. The cage frame is provided with stirring blades, and the cage frame is rotated to stir the aqueous solution containing the anaerobic microorganisms in the treatment tank, and the aqueous solution containing the anaerobic microorganisms and the inside of the cage. An apparatus for separating and treating shellfish and shells of organic solids such as shellfish according to any one of claims 2 to 4, which is designed to make good contact with the organic solids such as shellfish.