JP2012254026A - Method for producing mixture of fermented fish meal and surface-modified steelmaking slag, and method for making seaweed bed - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for producing a mixture of fermented fishmeal and surface-modified steelmaking slag, by which steelmaking slag is used in a process for producing fermented fishmeal using fishery product residues as a raw material, whereby the fermented fishmeal capable of being used as a fertilizer for making seaweed bed with the surface-modified steelmaking slag can simply be produced and supplied at a low cost.SOLUTION: The method for producing a mixture of fermented fishmeal and surface-modified steelmaking slag which is capable of being used as a fertilizer material for making the seaweed, includes mixing fishery residues with steelmaking slag and leaving the mixture, whereby the fishery residues can be fermented and the surface of the steelmaking slag can simultaneously be modified. The steelmaking slag contains slag particles having a particle diameter of not more than 2 mm in an amount of not less than 10 mass%.

Description

  The present invention relates to a method for producing a product that can be used as a fertilization material for supplying nutrients necessary for the sea area, and a method for creating a seaweed bed, which are useful for a seaweed bed creation method in coastal areas in Japan. Efficient mixture of fermented products (hereinafter referred to as fermented fish meal) and surface-modified steel slag that can be used as fertilizing materials for creation, and made from marine residues generated at fishing ports and fish processing plants in various regions The present invention relates to a simple production method and a seaweed bed construction method using a mixture produced by the method.

  In Japan's coastal areas, the phenomenon of useful algae such as seaweed and kombu, which is also called “burning firewood”, has been spreading in various parts of the country for the past 20 years, contributing to a decrease in catch. There are various theories about the cause of this burning, but as a countermeasure so far, for example, an approach to form a seaweed bed by introducing quarry stones or blocks into the sea as a substrate to which algae can adhere is carried out. I came. However, although the effect of algae overgrowth can be seen at the beginning of quarrying, the formation of continuous algae beds is a result of their surface being covered with lime algae that hinder the growth of useful algae after one to two years. Therefore, repeated measures such as new stones are required.

  On the other hand, fishery residues such as fish internal organs, skeletons, shells, and uro are generated in the areas around fishing ports in various areas due to processing of fishery products that have been landed. (Act No. 136 of 1945) has banned entry into the original sea area, so most of it must be treated and disposed of as waste. This is a cause of high manufacturing costs.

  The fishery processing residue entrusted to the waste disposal contractor is processed by being applied to a fish meal production plant, a fish oil production apparatus, a fish soluble (fish meal feed) production apparatus, or the like. This rough processing method is that the fishery processing residue is steamed (reduced heating), then squeezed and separated into boiled juice and compressed meal, and the boiled juice is further processed into fish oil and fish soluble through centrifugation and concentration processes The The compressed meal is dried and processed into fish meal (fish carp) and used as fertilizer.

The important thing in the above-mentioned series of marine processing residue treatment is the drying process, and the compressed meal is hot-air dried while continuously operating at a high temperature of 100 ° C. or higher in the drying apparatus, but in order to operate this drying apparatus efficiently, a large amount Marine processing residues are required, which causes collection of residues from a wide range, resulting in reduced freshness and decay of the residue.
Therefore, in order to avoid a decrease in freshness, the processing at the site where the residue is generated is most effective. However, if this happens, the processing must be performed on a small scale, and it becomes difficult to use an expensive drying apparatus.

  In order to solve this problem, a method of performing fermentation by microbial treatment without applying high temperature (for example, refer to Non-Patent Document 1) or cereals can be dried at a low temperature so that the freshness of the residue does not decrease. A small-scale production method based on the koji making method (for example, see Patent Document 1), or a method in which crushing / thermal decomposition / fermentation of residue is performed in a short time in the same heating kettle (biomesk system, for example, non- Patent Document 2) has been proposed.

  However, in the case of fermentation by microbial treatment, Non-Patent Document 1 states that if the deposition height of the residue in the fermenter is 20 cm or more, the air permeability deteriorates and the growth of microorganisms is suppressed. It is described that a very good fermenter and a large-scale fermenter having a wide fermentation area with a deposition height of 20 cm or less are required.

  In the case of the koji making method, as described in Patent Document 1, in order to prevent the growth of harmful bacteria such as food poisoning bacteria during koji making, for example, 50% by weight of monosaccharide and / or glucose is added to the pressed meal. It is described that a sugar substrate containing the above is added to produce a granular substrate, and the substrate is inoculated with gonococcus, which requires costly sugar addition and requires complicated steps. .

  Furthermore, in biomesk processing, as described in Non-Patent Document 2, crushing, thermolysis, and fermentation are continuously processed in the same kettle, so the kettle must be occupied and operated for a long time (about 40 hours). However, there is a further problem that the production efficiency is low and the processing cost is inevitably increased.

Japanese Patent Laid-Open No. 2004-357581 JP 2006-345738 A

Tomio Kato et al .: Journal of Japanese Society for Agricultural Chemistry, Vol. 60, no. 4 p-287 (1986) Kayaba Industry Co., Ltd. website http: // www. kayaba-ind. co. jp / nogoyo. htm

The inventors, as a more effective technique for creating seaweed beds in the seared sea area described at the beginning, for example, forms ammonia with divalent iron (Fe ²⁺ ) supplied from steel slag as described in Patent Document 2. An iron-based fertilizer composed of soluble complex ions [Fe (NH ₃ ) ₆ ] ²⁺ formed with ammonia (NH ₃ ) supplied from a nitrogen compound, and an organic fertilizer composed of phosphorus and nitrogen in the nitrogen compound We have developed a fertilization technique that supplies the same amount of water.
As specific examples, as described in the Examples of Patent Document 2, fermented fish meal (processed product obtained by fermenting aquatic residues) and humic substances such as humus soil, which are made from marine residues, By adding steel slag such as steelmaking slag as raw fertilizer to the seared seawater at the same time (fertilization), the fermented fish meal can contain nutrients such as nitrogen and phosphorus, and from the steel slag to the photosynthesis growth of algae iron is supplied at the same time is an essential element, is that the reclamation and playback the seaweed beds.

  However, as described above, in the production of fermented fish meal based on the conventional method at the site where fishery processing residues are generated, the amount (lot) that can be processed at one time depends on the scale of the production equipment (heating device, fermenter, etc.). Productivity is low due to the small amount, and equipment costs are high, and running costs such as heating and aging are also required for a long time. There has been a need for a new means for fermenting processing residues at lower cost and higher efficiency.

In order to increase the effect of fertilizer material for the seaweed formation, it is effective to use steelmaking slag that contains a relatively large amount of iron among steel slag. When there is a lot of alkali elution to the seawater, white turbidity due to precipitation of magnesium hydroxide (Mg (OH) ₂ ) accompanying the increase in pH of seawater may occur, and it is preferable to suppress it. For that purpose, it is necessary to make the surface-modified steelmaking slag by removing the lye in which the surface of the steelmaking slag is washed with a large amount of water like a concrete structure in advance, or by carbonation using carbon dioxide gas at the steelworks. However, there is also a problem that labor and cost for the surface modification treatment increase.

  Therefore, in the present invention, it is an object to provide a production method for easily producing a mixture of fermented fish meal and steel slag, which can be used as a fertilizer for seaweed establishment, and supplying it at a low price. To do. In particular, fermented fish meal and surface modification that can be used as fertilizer for seaweed development by utilizing a type of steel slag, a by-product of steel production, from the production process of fermented fish meal made from fishery residues. An object of the present invention is to provide a method for producing a mixture of fermented fish meal and surface-modified steelmaking slag for easily producing a mixture of quality steelmaking slag and supplying it at a low price.

  For the above purpose, the present inventors mixed fermented fish meal produced by a conventional method with steel slag and humic substances as a preliminary preparation stage for fertilizing materials to be introduced into the seawater-burned sea area for the seaweed development project. As a result of intensive research, the fishery residue and steel slag, particularly steelmaking slag generated in the steelmaking process, are mixed with the fishery residue before fermentation treatment or the fishery residue during fermentation. It has been found that fermentation of the residue is promoted. It was also very interesting that the carbonation reaction progressed on the surface of the steelmaking slag in parallel with the fermentation of the fishery processing residue.

  Based on these findings, the inventors have found that a mixture of fermented fish meal and surface-modified steel slag that can be used as a fertilizer for algae beds can be produced easily and efficiently.

The gist of the present invention is as follows.
(1) Mixing and leaving aquatic residues and steelmaking slag to ferment the aquatic residues and surface-modify the steelmaking slag to produce a mixture of fermented fish meal and surface-modified steelmaking slag A method for producing a mixture of fermented fish meal and surface-modified steelmaking slag characterized by the above.
(2) The method for producing a mixture of fermented fish meal and surface-modified steelmaking slag according to (1), wherein the steelmaking slag contains 10 mass% or more of a slag lump having a particle size of 2 mm or less.
(3) After mixing and leaving the fishery residue and steelmaking slag, the mixture after the leaving is further mixed with the fishery residue and steelmaking slag, and then left to improve the surface of the fermented fish meal. A method for producing a mixture of fermented fish meal and surface-modified steel slag according to (1) or (2), wherein a mixture of steel slag is produced.
(4) The fermented fish meal and surface modification according to any one of (1) to (3), wherein the fishery residue is heated or boiled in advance and then mixed with the steelmaking slag. Method for producing a steelmaking slag mixture.
(5) A mixture of fermented fish meal and surface-modified steelmaking slag produced by any one of the production methods (1) to (4) is added to the fishery residue and steelmaking slag, and the mixture is left to stand, A method for producing a mixture of fermented fish meal and surface-modified steelmaking slag, wherein fermented marine residues and surface-modifying the steelmaking slag to produce a mixture of fermented fish meal and surface-modified steelmaking slag.
(6) A mixture of fermented fish meal produced by the method according to any one of (1) to (5) and surface-modified steel slag is administered to the sea as a fertilizer material for seaweed formation. How to create a seaweed bed.

  Also, in the present invention, when leaving a mixture produced by mixing fishery residues and steelmaking slag, by adopting a composting system that is deposited in an existing concrete pit or yard (between soil) and fermented, A mixture of a large amount of fermented fish meal and surface-modified steelmaking slag that can be used as a fertilization material for algae beds is more easily and efficiently produced.

  According to the method for producing a mixture of fermented fish meal and surface-modified steelmaking slag that can be used as a fertilizing material for seaweed formation according to the present invention, a sugar is added for koji making to produce a granular substrate and inoculating koji mold Without using special processes, special large-scale fermenters, etc., or deteriorating equipment operating efficiency such as constraining a dedicated kettle to the fermentation stage, materials that can be used for fertilizing fertilizer for seaweed development, It can be easily supplied at a low price.

It is a flowchart which shows the compost manufacturing method of dry plant residue materials, such as the conventional rice straw. It is a flowchart which shows the conventional cow dung compost manufacturing method (continuous manufacture by a return compost). It is a flowchart which shows the manufacturing method of the fertilization material for seaweed bed creation by this invention. It is a graph which shows the range of the particle size distribution of the general roadbed material. It is a graph which shows transition (initial batch mixing) of the product temperature at the time of manufacture of the fertilization material for seaweed formation concerning Example 1 of the present invention. It is a graph which shows transition of the product temperature (division mixing) at the time of manufacture of the fertilization material for seaweed formation concerning Example 2 of the present invention. It is a graph which shows transition (heating division | segmentation mixing) of the product temperature at the time of manufacture of the fertilization material for seaweed bed creation concerning Example 3 of this invention. It is a graph which shows transition of the product temperature (winter heating division mixing) at the time of manufacture of the fertilization material for seaweed bed creation concerning Example 4 of the present invention. It is a graph which shows transition of the product temperature at the time of manufacture of the fertilization material for seaweed bed creation concerning Example 5 of this invention (at the time of slag with much powder content). It is a graph which shows transition of the product temperature at the time of manufacture of the fertilization material for seaweed bed creation concerning Example 6 of this invention (at the time of slag with little powder content). It is a graph which shows transition of the article temperature at the time of manufacture of the fertilization material for seaweed bed creation concerning Example 7 of the present invention (fertilization material return). It is a graph which shows the transition (use of natural stone) of the product temperature at the time of manufacture of the fertilization material for seaweed bed construction concerning the comparative example 1.

  Exemplary embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

  The method for producing a mixture of fermented fish meal and surface-modified steelmaking slag, which can be used as a fertilizer for seaweed formation according to the present invention, comprises mixing marine residues and steelmaking slag generated in the steelmaking process among steel slags. By leaving it to stand for a while, the fermentation of the marine product residue proceeds remarkably, and the carbonation reaction proceeds on the surface of the steelmaking slag, so that a mixture of fermented fish meal and surface-modified steelmaking slag can be easily produced.

  In the following, the mixture of fermented fish meal and surface-modified steel slag in the present invention will be simplified and also referred to as a fertilizer material for seaweed bed construction.

  In the present invention, it is possible to use aquatic residues such as fish head, middle bone, internal organs, ara, etc. produced by marine processing, seafood residues such as seafood residue with poor commercial value, or aquatic residues obtained by heating these. it can. In the present invention, steel slag such as converter slag and electric furnace slag generated in steel production can be used.

  In the present invention, the above-described marine residue (either non-heated or heated) may be mixed with steelmaking slag, and then left to stand so that the marine residue is fermented to become fermented fish meal, resulting in steelmaking slag. The carbonation reaction proceeds to form surface-modified steelmaking slag, and a mixture of fermented fish meal and surface-modified steelmaking slag is produced.

  At that time, the mixing method is not limited, but it can be mixed in a slurry form or a cake form in a container such as a pan. The subsequent leaving can be left in the mixing container or moved to another place and left outside, whether it is indoors or outdoors.

  In addition, during the standing period, the fermentation of the fishery residue proceeds to fermented fish meal, and it can be left until the carbonation reaction of the steelmaking slag progresses to the surface-modified steelmaking slag. For example, it can be said that not only fermented fish meal is produced due to fermentation, but also surface modification by carbonation of steelmaking slag has progressed to form surface-modified slag.

  More preferably, until the temperature rises in the course of fermentation and the peak temperature (for example, 60 ° C.) passes and the overall temperature drop is settled (until the temperature between the fermentation start temperature and the peak temperature is about). If it is left for a period of time or longer, it can be said that fermentation and surface modification are more fully progressed.

  Furthermore, in the present invention, in particular, when using a composting system that is fermented by depositing in an existing concrete pit or yard (between soils), fermented fish meal and surface-modified steel slag can be easily and more efficiently produced. It is preferable that a mixture can be produced.

  The composting method will be described below.

  In the first place, composting refers to “biological decomposition of organic waste (organic matter) under certain controlled conditions so that it is easy to handle, has good storability and can be safely reduced to the soil without harming the environment. It means that composting organisms break down mainly animal excrement (mostly cow dung, which is a large amount of livestock dung). In the state where organic matter decomposition is incomplete, there are various problems as fertilizers, and it is also said that composting is carried out artificially until these problems do not occur.

Moreover, general plant residues such as rice straw are composted through the following steps shown in FIG. 1 (composting method).
1) Preparation of composting materials (watering, cutting) → 1 day 2) Loading (lime milk added) and laying down → 2 weeks 3) Full loading (cutting, watering, adding ammonium sulfate) → 4 weeks (3-4 days) Fever, 60 ° C over 2 weeks)
4) After the crosscut (temperature drop, stacking) → 1 month ripened more, almost three months

  Similarly, FIG. 1 also shows a conventional method for producing rapid compost, which uses lime nitrogen as a nitrogen source instead of lime milk and ammonium sulfate, and shortens the production period. In this case, it is said that it is more efficient because it does not require sleeping with lime milk and it can be booked from the beginning.

  On the other hand, a method for producing compost from cow dung is shown in FIG. Livestock manure has a high water content, and since it does not compost unless it is dried in advance until it reaches about half of the water content of the live feces (water content level of 50%), a sun drying process is required first. When the water content reaches about 40%, raw cow dung is mixed in an equal amount by weight and fermented. Performed crosscut (mixing) at a rate of once every 2-3 days, seed compost obtained was aged at about 10 days. Furthermore, when this seed compost is mixed with an equal amount of raw cattle manure, the useful microorganisms brought from the seed compost become the fermentation source, and after a few days the temperature rises to about 60 ° C, and this is cut back once every two to three days. For example, fully-ripened cow manure compost can be obtained in 2 to 3 weeks.

  However, a nasty smell peculiar to excreta is generated in the early stage of sun drying or sedimentation fermentation of raw feces.

  As described above, even in the conventional composting system, it is necessary to dry to reduce the water content of cow dung. As a result, it can be inferred that the production of fermented fish meal, the aforementioned koji making method, the biomesk method of fermenting in a dedicated kettle, etc. were the mainstream.

  Next, the manufacturing method of the fertilization material for seaweed bed construction concerning the present invention is explained.

  FIG. 3 shows an example of the manufacturing method according to the present invention, and the main points thereof will be described below.

  First, a site where fishery residue such as fish heads, bones, internal organs, and ara, generated from fisheries processing plants around the fishing port or around the fishing port, or seafood residues with poor commercial value are collected in a certain container and subjected to fermentation treatment To transport.

  Sediment judgment of marine pollution prevention law (Environment Agency Notification No. 14), such as squid and octopus heads that accumulate specific heavy metals such as lead, and scallop cotton that concentrates shellfish poisons seasonally It is preferable not to use residues that may contain harmful substances that do not meet the standards.

Next, the steelmaking slag generated at the steelworks is stored in a bag such as a flexible container (flexible container bag) and carried into the site. Steelmaking slag here is mainly produced as a by-product in the steelmaking process in the blast furnace-type integrated steelworks (the process of blowing oxygen to molten pig iron with a high carbon content and refining it to steel with a low carbon content). It refers to a rock-like complex oxide composed of components such as CaO, SiO ₂ , FeO, and Fe ₂ O ₃ and cooled from a melted state in the steelworks premises. In Table 1, the analysis result of the general chemical component of steelmaking slag is shown by the mass% display. Originally, it is close to the natural mineral state because it is a by-product of recovering iron from iron ore, which is a natural resource. So far, the particle size is adjusted through crushing and classification processes, mainly for civil engineering work such as roadbed material for roads. It has been used extensively as an aggregate material.

  This steelmaking slag is unloaded and then piled up again using a heavy machine or the like, and finally a part of the top of the mountain is cut into a mortar shape so that it is easy to mix fishery residues.

  A fishery residue is poured into the mortar-like pile of the steelmaking slag, the steelmaking slag and the fishery residue are sufficiently mixed using a heavy machine or the like, and finally the mixture is piled up again in a mountain shape and deposited. At this time, the steelmaking slag absorbs moisture in the fishery processing residue, and excess moisture is not released from the bottom of the mountain to the outside of the system, so that it is possible to considerably suppress the generation of bad odor due to subsequent decay.

  In addition, although this steelmaking slag can use what was manufactured as a civil engineering material, such as the above-mentioned roadbed material for roads as it is, the particle size distribution by JIS A5015 "steel slag for roads" for this use. Is regulated within a specific range as indicated by a band in FIG. Here, since the thing close | similar to the sand of 2 mm or less shows the effective role in the absorption of the water | moisture content in the above-mentioned fishery residue, it is desirable that the mass ratio is 10% or more with respect to the total mass.

  On the other hand, when there are too many fine lumps, it leads to a decrease in the air permeability of the whole mountain, so that the mass ratio of the lumps of 5 mm or less is more preferably 40% or less. However, even if it is 40% or more, it is not limited as long as it is combined with a method of inserting air into the bottom of the mountain and feeding air.

  In the middle of the deposition operation of the mixture, sensors capable of measuring temperature and humidity as necessary are embedded in each part of the mixture to prepare for fermentation. Here, during the rainy season when there is a lot of rainfall, it is preferable to place a sheet on this mountain so that the water in the mixture does not rise.

  After that, if left unattended, the temperature inside the sediment rises with the fermentation after 1 to 2 weeks, depending on the season, even if no special work or heat treatment is performed. A temperature of 60 ° C. or more can be maintained, and pathogenic microorganisms can be killed by this heat.

  As a feature of this method, the massive steelmaking slag first absorbs the moisture of the marine residue, so that excess moisture does not ooze out around the mountain, and the marine residue is sufficiently dried in advance as in the conventional method. Even if not, it is possible to reduce the water content of the fishery residue itself.

  However, in order to reduce the moisture content of the fishery residue, there is no inferiority even when combined with a method of evaporating moisture by heating in advance.

  Furthermore, the “return compost” method, which is used as a method for increasing the production efficiency of the conventional composting method shown in FIG. It is extremely effective in promoting

  As described above, as a result of this feature, the surface of the massive steelmaking slag is covered with the contents (semi-solid matter) of the marine product having a relatively low moisture content, but there is sufficient space between the masses of the steelmaking slag. Since the air gap can be secured, the entire mountain can be made breathable without any ingenuity such as standing logs or vinyl pipes when clogging, and then drawing them out to create air holes. Can be secured.

  Steelmaking slag contains a calcium component that easily dissolves in water of several percent (hereinafter referred to as free lime), and this free lime elutes very slowly, facilitating the microbial degradation of organic matter. Therefore, it is not necessary to add lime milk, ammonium sulfate or lime nitrogen at the initial stage as in the conventional composting method.

Furthermore, although this free lime dissolves in the water contained in the steelmaking slag and in the water present in the slag pore water (Ca ²⁺ ), it becomes alkaline, but the CO ₂ produced by the microorganisms during fermentation is the Ca content. A carbonation reaction takes place upon reaction. Since this reaction is exothermic, the temperature of the whole mountain can be maintained at a high level without adding waste cooking oil or heating from the outside even when the outside air temperature is low, especially in the Hokkaido area in winter.

  Thus, even when the outside air temperature is low, a high temperature of 60 ° C. or higher can be stably maintained for 2 weeks or more, and pathogenic microorganisms can be killed by this heat.

  If the temperature of the whole mountain rises excessively due to this heat generation due to fermentation, such as in summer, as in the conventional method, a part of the mountain is occasionally broken down by heavy machinery, or a pipe is appropriately attached to the bottom of the mountain. insert the like, send air through the pipe, it is of course effective to perform heat removal process such.

Here, calcium carbonate (CaCO ₃ ), which is a product of this reaction, is generated at the interface between the fishery residue and the steelmaking slag. In other words, a part or most of the surface of the steelmaking slag is mixed with the fishery residue. It will coat | cover, and the steelmaking slag surface will be improved.

  In the production of conventional fertilization materials for seaweed bed construction, it was stated earlier that the individual raw materials prepared for each were mixed, but when using steelmaking slag with a lot of free lime, the purpose is to suppress alkali elution from the surface to seawater. Therefore, it was necessary to wash the surface with a large amount of water at the steelworks and to perform a surface modification treatment using this carbonation reaction. On the other hand, in the present invention, such a pre-modification treatment of steelmaking slag is not required, and the pH of the surrounding seawater when the fertilizer for creating seaweed beds produced in this way is administered to the sea area, the fermented fish meal of the conventional method fertilizing material obtained by mixing the surface modified steel slag and it is possible to numerically comparable to that stability in the case of waters administered.

In order to confirm that the steelmaking slag has been surface-modified, the free lime is reduced by chemical analysis, or more specifically, since CaCO ₃ is produced by carbonation. This can be confirmed by measuring the steelmaking slag after mixing with the slag by powder X-ray diffraction and seeing that the peak strength of CaCO ₃ is stronger in the steelmaking slag after being left. Alternatively, it may be confirmed by an EPMA measurement that the C component on the steelmaking slag surface after being left is increased.

  In addition, as for the progress of fermentation, primary fermentation (decomposition of readily decomposable organic substances in the high temperature period) and secondary fermentation (completeness degree) are measured by measuring the temperature of the mountain and the ammonia concentration of the gas collected from the inside as appropriate. Can be managed.

  That is, when viewed from the transition of the product temperature and the decrease of the organic matter index, it is considered that the decomposition of the organic matter proceeds sufficiently if the product temperature of 60 ° C. is maintained for about 1 to 2 weeks, and at this time, the generation of ammonia is also reduced. From the viewpoint of compost quality and environmental consideration, it can be said that maintaining the product temperature is important.

  Ammonia generated by this method is sampled from the vicinity of compost, so the measured value is somewhat high, but it is diluted by the atmosphere at the boundary of the site, so that odor is not particularly worrisome. It was also confirmed that the measured values were not much higher than those measured at the composting facility that processed livestock manure.

  Thus, according to the method for producing a fertilizer material for seaweed formation according to the present invention, a special process for adding a sugar for producing koji and producing a granular substrate and inoculating koji mold or a special large-scale fermenter The fertilizer for creating seaweed beds can be supplied at a low price without the use of a device or the like, or without reducing the efficiency of operation of the apparatus such as restraining a dedicated kettle to the fermentation stage.

  Specifically, the aquatic residue is heated using a boiling boiler, and then the conventional biomesk method in which the fermentation is performed in a closed condition while removing moisture in the same kettle, and the aquatic residue is only heated in the kettle. As a result of trial calculation and comparison of the manufacturable amount by the method of the present invention to be mixed with steelmaking slag, in the present invention, only heating in the kettle is carried out, and since the occupation rate is low, the production can be about three times, and the raw fuel and labor It was found that the cost required for manufacturing, such as expenses, can be reduced to less than half of the conventional cost.

  In addition, the seaweed bed building material produced in this way is compared with the conventional seaweed bed building material produced by a method of preparing various raw materials such as fermented fish meal, steelmaking slag and / or humic substances and then mixing them. Further, the generation of dust and odor generated during production is suppressed, and the workability during production is very good.

  Furthermore, in the construction work of fertilizer material in the sea area, the fermented fish meal is fixed around the lump of the steelmaking slag in the fertilizer material for seaweed formation by the production method of the present invention. There was no problem that only fermented fish meal, which was light and powdery, was thrown into the seawater, and the yield was good.

  Furthermore, it was confirmed in a fertilization experiment on actual sea urchin sea area that the fertilization material for seaweed bed creation by the production method of the present invention has a fertilization effect related to the creation of seaweed bed inferior to that of each conventional mixture. is doing.

  Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples.

Example 1
About 10 tons of steelmaking slag loaded from a steel mill and piled up in a mortar-shaped mountain, about 4 tons of marine residue (water content of about 85%) including the hockey and cocoon bones brought in from a nearby fishery processing plant Poured and mixed them well using heavy machinery and piled up a new pile. The steelmaking slag used here was originally adjusted in particle size as an aggregate for road base materials, and the mass ratio of slag lumps of 2 mm or less was about 20%, and the mass ratio of 5 mm or less was about 35%. there were.

  After setting a thermometer and a hygrometer at the top (200 mm depth) and middle of the mountain of this mixture, and several parts of the mountain bottom, the whole was covered with the blue sheet, and the preparation for fermentation was completed. During this mixing operation, almost all the water from the fishery residue was absorbed by the steelmaking slag piles, and no spillage from the piles was observed even when the piles were completed.

  Thereafter, the temperature and humidity were appropriately observed, and a dedicated odor cover was appropriately installed inside the blue sheet, and the ammonia concentration was measured using a detection type gas measuring device.

  FIG. 5 shows changes in the outside air temperature and the temperature at the top of the mountain with respect to the number of days elapsed from the day when the seafood residue and steelmaking slag were mixed and piled up. From this figure, the temperature in the mountain is almost the same as the outside temperature for a while after being left, but since the 10th day indicated by the dotted line in the figure, the fermentation has become active and the temperature inside the mountain has started to rise, and it has been over 20 days. The temperature reached 60 ° C., and the temperature in the mountains was maintained at 60 ° C. or higher for about 20 days, and the fermentation state continued. During this time, the blue sheet was turned over several times, and switching (mixing) was performed using a heavy machine, but no extreme temperature drop was observed.

  From the 20th day, when the ammonia concentration in the gas in the mountain was measured as appropriate, it was about 200 ppm at the beginning of the fermentation when the temperature reached 60 ° C., but the concentration gradually increased after about 30 days. As the temperature decreased from the 40th day onward, the concentration became 50 ppm or less, and it was found that the decomposition of the organic matter was sufficiently advanced. During this time, no particular off-flavor was detected outside the blue sheet.

  At the time of turnover, the material in the mountain is collected, the permeate is separated by permeation extraction / centrifugation with distilled water, and the biochemical oxygen demand as an indicator of TOC (total organic carbon) and readily decomposable organic matter. The amount (BOD) and the like were also analyzed, but the BOD decreased with the passage of days, and it was also confirmed that the decomposition of organic substances was progressing.

  Furthermore, as a result of embedding a part of the sample in resin, polishing the cross section by polishing work, and conducting EPMA measurement, it was detected that the C component was present in the form of a thin film on the steelmaking slag surface, and the modification status could be confirmed. It was.

  The method for evaluating the sediment sediment criteria of the Law Concerning the Prevention of Marine Contamination (Environmental Agency Notification No. 14) after allowing the fertilized material for seaweed bed construction produced in this way to stand for a further month to complete ripeness As a result of the dissolution test based on the above, it was confirmed that the criteria for all elements such as heavy metals were met. Therefore, about 2 tons were filled into a water-permeable bag and filled into a steel box to grow algae. It was installed in early spring in an unseasonable sea area (the seabed).

  At the time of installation, the pH of the seawater before and after the installation was measured, and all showed about 8.2 and no significant change was observed. Then, when the seaweed place situation of this sea area was observed, it has also confirmed that the growth of the algae around the steel box was favorable compared with the surrounding sea area.

(Example 2)
In Example 1, 4 tons of marine residues brought in from the vicinity over several days were collectively mixed, but in reality, there is a difference in the amount of marine residues that are generated per day. A process of adding an additional fresh residue was performed. As in Example 1, the mass ratio of the slag lump of 2 mm or less adjusted as the aggregate for the roadbed material for roads is about 20%, and the mass ratio of 5 mm or less is about 35 tons of steelmaking slag of about 10 tons. The fishery residue (including water content of about 85%), including the hockey and salmon bones carried from the nearby seafood processing plant, was poured into the mountain at every 2 days, and these were used using heavy machinery. Mixed well.

  On the 8th day from the start of the treatment, mixing of about 4 tons of marine residue was completed, so thermometers were set at the top and middle of the mountain, and at several places on the mountain slope, and the whole was covered with a blue sheet, and the fermentation treatment was started. Even during this divided mixing operation, almost all of the water in the fishery residue was absorbed by the piles of steelmaking slag, and no spillage from the piles was observed when the piles were completed.

  Thereafter, the temperature was observed, and a dedicated odor cover was installed inside the blue sheet, and the ammonia concentration was measured using a detection gas meter.

  Figure 6 shows changes in the temperature of the top portion of the outside air temperature and the mountain with respect to an elapsed number of days obtained by dividing mixed fisheries residue. From this figure, compared to the initial batch mixing shown in FIG. 5, the start of the fermentation was delayed because it took several days to complete the filling of the necessary aquatic residue, but the start of the temperature increase was delayed for several days, but for a while Although the temperature inside the mountain is almost the same as the outside temperature, the temperature inside the mountain rises with fermentation after about 2 weeks, reaches 60 ° C after the 25th day, and the temperature inside the mountain reaches 60 ° C for about 20 days. The temperature remained above ℃, and the fermentation state continued. During this time, the blue sheet was turned over several times, and switching (mixing) was performed using a heavy machine, but no extreme temperature drop was observed.

  From the 25th day, when the ammonia concentration in the gas in the mountain was measured appropriately, it was about 200 ppm in the early stage of fermentation, but the concentration gradually decreased after about 35 days. The concentration became 50 ppm or less, and it was found that the decomposition of the organic matter was sufficiently advanced.

(Example 3)
Until the inventors studied the present invention, fermented fish meal was produced from aquatic residues using a biomesk processing method in which crushing, thermal decomposition, and fermentation were continuously processed in the same kettle. In this method, by heating and boiling the aquatic residue using steam heating, the water content in the aquatic residue can be reduced and the solid content in the contents can be softened. Therefore, in Example 3, a process of combining the division and mixing process described in Example 2 with the heating of the fishery residue was performed.

  Specifically, as in Examples 1 and 2, the mass ratio of slag lumps of 2 mm or less adjusted in particle size as aggregate for road roadbed materials is about 20%, and the mass ratio of 5 mm or less is about 35%. About 10 tons of steelmaking slag is piled up in a mortar-shaped mountain, and about 1 ton / time of fishery residue (water content about 85%) including hockey and cocoon bones brought in from a nearby fishery processing plant Heating and boiling were performed in a heating kettle, which was poured into a steel slag pile every two days and mixed well using heavy equipment. In addition, after the mixing process for heat retention, the whole was covered with a blue sheet each time.

  On the 8th day from the start of the treatment, the mixing of about 4 tons of heated marine product residue was completed, and thermometers were set at the top and middle of the mountain as well as at several places on the mountain slope, and the whole was covered with a blue sheet to start the fermentation treatment. Even during this divided mixing operation, almost all of the water in the fishery residue was absorbed by the piles of steelmaking slag, and no spillage from the piles was observed when the piles were completed.

  Thereafter, the temperature was observed, and a dedicated odor cover was installed inside the blue sheet, and the ammonia concentration was measured using a detection gas meter.

  Figure 7 shows changes in the temperature of the top portion of the outside air temperature and the mountain with respect to an elapsed number of days obtained by dividing mixed fisheries residue. From this figure, compared to the split mixing without heating shown in FIG. 6, the temperature of the mountain is about 30 ° C. due to the heat of the marine residue from the first day, and the mountain accompanying fermentation from the next day when the required amount of marine residue is filled. The internal temperature rose and reached 60 ° C. on the 14th day, and the temperature in the mountain changed to 60 ° C. or higher for about 20 days from that point, and the continuation of the fermentation state was observed. During this time, the blue sheet was turned over several times, and switching (mixing) was performed using a heavy machine, but no extreme temperature drop was observed.

  From the 15th day, when the ammonia concentration in the gas in the mountain was measured appropriately, it was about 200 ppm at the beginning of the fermentation, but the concentration gradually decreased after about 30 days. The concentration became 50 ppm or less, and it was found that the decomposition of the organic matter was sufficiently advanced. Therefore, the fermentation operation could be completed by taking a blue sheet.

(Example 4)
The examples so far relate to treatment in a state where the outside air temperature is good from spring to summer, but in autumn and winter, especially in cold regions where the temperature is low, conventional cow manure compost production etc. It is said that a fermentation acceleration treatment accompanying auxiliary heating is necessary. Whether or not the case where the fishery residue heated in Example 3 was heated was effective in such a cold region, the treatment was carried out from October to November before snow accumulation.

  Similar to the previous examples, the mass ratio of the slag lump of 2 mm or less adjusted as the aggregate for the roadbed material for roads is about 20%, and the mass ratio of 5 mm or less is about 35 tons of steelmaking slag of about 10 tons. The fishery residue (water content about 85%) including the hockey and the heel bones brought in from the nearby fishery processing plant is stacked in a mortar-shaped mountain, and the above-mentioned heating-only pot is used. subjected to heating and boiling treatment at, poured it into a mountain of steel slag in every two days, and mixed well by using heavy machinery. In addition, after the mixing process for heat retention, the whole was covered with a blue sheet each time.

  On the 10th day from the start of the treatment, mixing of about 4 tons of heated marine product residue was completed, thermometers were set at the top and middle of the mountain, and at the bottom of the mountain, and the whole was covered with blue sheet, and the fermentation treatment was started. Even during this divided mixing operation, almost all of the water in the fishery residue was absorbed by the piles of steelmaking slag, and no spillage from the piles was observed when the piles were completed.

  Thereafter, the temperature was observed, and a dedicated odor cover was installed inside the blue sheet, and the ammonia concentration was measured using a detection gas meter.

  Figure 8 shows changes in temperature at the top part of the outside air temperature and the mountain with respect to an elapsed number of days obtained by dividing mixed fisheries residue. From this figure, compared with the summer heating / division mixing shown in FIG. 7, the mountain temperature is about 20 ° C. from the first day, and the temperature in the mountain after the 10th day when the required amount of fishery residue is filled is It did not rise and was in a state where fermentation did not start. Since the outside air temperature also decreased with the passage of days, about 2 weeks later, three SUS pipes with an inner diameter of 20 mm were inserted into the bottom of the mountain from the mountain skirt, and air was blown using a blower during the daytime.

  As a result, in spite of the decrease in the outside air temperature, the temperature starts to rise from about one week after the start of the air blowing, and the mountain temperature reaches 60 ° C. after 30 days, and the outside air temperature is 0 for about 20 days. ℃ despite Yamauchi temperature there is a day less than it remained more than 60 ℃, continuation of the fermentation state was observed.

  When the ammonia concentration in the gas in the mountain was measured appropriately, it was about 200 ppm around the 30th day, but the concentration gradually decreased after about 40 days, and the concentration was also 50 ppm on the 45th day. following the will for the decomposition of organic matter, which is that you have sufficiently proceed was found, it was to end the fermentation work to stop the blower.

(Example 5)
The steelmaking slag used in the present invention has been adjusted in particle size as an aggregate for road roadbed materials as previously shown in FIG. 3, and in the previous embodiment, the mass ratio of slag lumps of 2 mm or less is about The mass ratio of 20% and 5mm or less was about 35%, but from the viewpoint of air permeability in the mountain, in order to confirm whether proper processing is possible when the powder content is 2mm or less, separately, At steelworks, the mass ratio of slag lumps of 2 mm or less is about 30%, and the mass ratio of 5 mm or less is about 45% of steelmaking slag, about 10 tons is adjusted and loaded, and it is stacked on a mortar-shaped mountain Then, about 1 ton / time of fishery residue (water content: about 85%) including hockey and salmon bones brought in from the nearby fishery processing plant is heated and boiled in the above-mentioned dedicated heating pot, Pour this into a pile of steel slag every two days and mix well using heavy machinery . In addition, after the mixing process for heat retention, the whole was covered with a blue sheet each time.

  On the 8th day from the start of the mixing treatment, mixing of about 4 tons of heated marine product residue was completed, thermometers were set at the top, middle and top of the mountain, and at several places on the mountain slope, and the whole was covered with blue sheet, and the fermentation treatment was started. Even during this divided mixing operation, almost all of the water in the fishery residue was absorbed by the piles of steelmaking slag, and no spillage from the piles was observed when the piles were completed.

  Thereafter, the temperature was observed, and a dedicated odor cover was installed inside the blue sheet, and the ammonia concentration was measured using a detection gas meter.

  FIG. 9 shows changes in the outside air temperature (◯ mark) and the temperature at the peak of the mountain (▲ mark) with respect to the number of days elapsed from the day when the fishery residue was divided and mixed. This figure also shows the measurement results of Example 3 in which the powder content shown in FIG. 7 was moderate (marked with ●), but 10 days have passed since the powder content is too much and the air permeability is lowered. However, the mountain temperature does not rise as much as in Example 3. However, since the temperature began to rise gradually from the 15th day, when turning the blue sheet on the 20th day and cutting the mountain with heavy machinery, the temperature inside the mountain rose from the next day, 25 day is reached 60 ° C., for about 20 days therefrom, Yamauchi temperature remained over 60 ° C., continuing the fermentation state was observed.

  From the 25th day, when the ammonia concentration in the gas in the mountain was measured appropriately, it was about 200 ppm at the beginning of the fermentation, but the concentration gradually decreased after about 35 days. The concentration became 50 ppm or less, and it was found that the decomposition of the organic matter was sufficiently advanced.

(Example 6)
In Example 5, it was confirmed that fermentation treatment can be performed in the present invention by processing such as reversal even when the steelmaking slag has a large amount of powder. On the contrary, what happens when the amount of powder is small? Was also confirmed.

  In steelworks, steelmaking slag, which has been used as an aggregate for road roadbed materials, has been used to classify the steelmaking slag with a 5 mm sieve to classify 5 mm or less, and the slag under the sieve is further filtered with a 2 mm sieve. After sieving, the powdered slag of 2 mm or less is mixed again so that the mass ratio is 5% with respect to the whole slag, and the slag of 5 mm or less is about 35% in the same mass ratio as in Example 5. Prepared and carried in the redone. This steelmaking slag with a mass ratio of 2mm or less, about 10% of steelmaking slag, about 10 tons stacked on a mortar-shaped mountain, and then a fishery residue (water content about approx. 85%) About 1 ton / time was heated and boiled in the above-mentioned heating-only kettle, poured into a pile of steel slag every two days, and mixed well using a heavy machine. In addition, after the mixing process for heat retention, the whole was covered with a blue sheet each time.

  In the case of steelmaking slag piles with a mass ratio of 2% or less of about 5% during this mixing operation, the water absorption capacity decreases due to the small amount of powder, and moisture leaks out from the mountain ridges somewhat at the beginning of mixing. However, the water was covered with steel slag so that it was absorbed well, mixing was completed, and thermometers were set at the top and middle of the mountain and at the base of the mountain, and the whole was covered with a blue sheet. .

  Thereafter, the temperature was observed, and a dedicated odor cover was installed inside the blue sheet, and the ammonia concentration was measured using a detection gas meter.

  Figure 10 shows changes in the temperature of the top portion of the outside air temperature and the mountain with respect to an elapsed number of days obtained by dividing mixed fisheries residue. From this figure, the temperature of the mountain is 30 compared to the measurement result of Example 3 where the powder content shown in FIG. Although the period was about a little longer, the temperature increased from the 12th day, reached 60 ° C on the 18th day, and then the temperature in the mountains remained above 60 ° C for about 20 days. Continuation of the condition was observed. During this time, the blue sheet was turned over several times, and switching (mixing) was performed using a heavy machine, but no extreme temperature drop was observed.

  From the 20th day, when the ammonia concentration in the gas in the mountain was measured appropriately, it was about 200 ppm at the beginning of fermentation, but the concentration gradually decreased after about 35 days. The concentration became 50 ppm or less, and it was found that the decomposition of the organic matter was sufficiently advanced. Therefore, the fermentation operation could be completed by taking a blue sheet.

  The fertilizer material for the seaweed basin production thus produced is left to stand for about one month to be fully matured, and then the dissolution test is based on the evaluation method of the bottom sediment judgment criteria of the Act on the Prevention of Marine Pollution (Environmental Agency Notification No. 14) After confirming that all the elements such as heavy metals meet the criteria, water permeability was mixed while mixing about 1.5 tons of the fertilizer and 0.5 tons of humic substances prepared separately. It was packed in a steel box while being divided into sex bags, and installed in the fallen sea area where no algae grows. At the time of installation, the pH of the seawater before and after the installation was measured. There was no cloudiness of the seawater. After that, in the spring of the following year after the winter season, new algae breeding (regeneration) was confirmed around the steel box.

(Example 7)
In the composting of cow dung, it is shown in FIG. 2 that the method of returning compost that increases the efficiency using the seed compost that has already been fermented is effective. Carried out.

  The mass ratio of the slag lump of 2 mm or less, which is adjusted in particle size as the aggregate for roadbed material for roads, is about 20%, and the mass ratio of 5 mm or less is about 35 tons of steelmaking slag, which is first produced by the method of the present invention. After mixing 3 tons of fertilizer materials for creating seaweed beds, they were piled up on a mortar-shaped mountain, and fishery residues (including water content of about 85%) including the hockey and salmon bones brought in from the nearby fishery processing plant 4 tons were poured into the pile and mixed well using heavy equipment.

  After completion of mixing, thermometers were set at the top and middle of the mountain, and at the base of the mountain, and the whole was covered with a blue sheet to start the fermentation process. Even during this mixing operation, almost all the water in the fishery residue was absorbed by the steelmaking slag piles, and no spillage from the mountain skirts was observed when the piles were completed.

  Thereafter, the temperature was observed, and a dedicated odor cover was installed inside the blue sheet, and the ammonia concentration was measured using a detection gas meter.

  Figure 11 shows changes in the temperature of the top portion of the outside air temperature and the mountain with respect to an elapsed number of days obtained by dividing mixed fisheries residue. From this figure, despite the unheated marine residue, the mountain temperature started to rise 2 days after mixing and reached 60 ° C after 1 week, and the temperature in the mountain exceeded 60 ° C for about 20 days. The fermentation state continued. During this time, the blue sheet was turned over several times, and switching (mixing) was performed using a heavy machine, but no extreme temperature drop was observed.

  After the 8th day, the ammonia concentration in the gas in the mountain was measured as appropriate, and it was about 200 ppm in the 2nd week, but the concentration gradually decreased after about 20th day. Since the concentration became 50 ppm or less and it was found that the decomposition of the organic matter was sufficiently advanced, the blue sheet was taken on the 30th day and the operation was completed.

(Comparative Example 1)
The point of the present invention is that the steelmaking slag is used during the fermentation treatment of aquatic residues to ensure air permeability and promote fermentation accompanying moderate alkali elution and heat generation (heat retention). In order to determine this effect, natural aggregate (mostly mass ratio of mass of 2mm or less is about 20%, mass ratio of 5mm or less is about 35%) instead of steelmaking slag Prepared and mixed with silica sand and granite).

  About 10 tons of natural aggregate with adjusted particle size is piled up in a mortar-shaped mountain, and aquatic residues (water content of about 85%) including hockey and salmon bones brought in from a nearby fishery processing plant are about 1 ton / time. Was heated and boiled in the above-mentioned heating-only kettle, poured into a pile every two days, and mixed well using a heavy machine. In addition, after the mixing process for heat retention, the whole was covered with a blue sheet each time.

  During this mixing operation, the natural aggregate was denser and less water-absorbing than steelmaking slag, so the water from the fishery residue was not absorbed so much and most of it leaked out of the mountain skirt. After the mixing is complete, set the thermometer to the mountain of the vertex and the middle as well as the foot of the mountain several places, covered the whole a blue sheet.

  Thereafter, the temperature was observed, and a dedicated odor cover was installed inside the blue sheet, and the ammonia concentration was measured using a detection gas meter.

  Figure 12 shows changes in the temperature of the top portion of the outside air temperature and the mountain with respect to an elapsed number of days obtained by dividing mixed fisheries residue. From this figure, the temperature of the mountain became about 30 ° C due to the heat of the fishery residue during mixing, and it remained at the same temperature until the filling of the required amount of the fishery residue was completed. Almost no increase in temperature was observed, rather the temperature dropped to the same level as the outside air temperature, and even when switching back, the phenomenon did not change, and fermentation did not proceed.

  From the 10th day onward, the ammonia concentration in the gas in the mountain was measured as appropriate, but it was about 200 ppm indefinitely, and no decomposition of organic matter could be observed.

  The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to such examples. It is obvious that a person having ordinary knowledge in the technical field to which the present invention pertains can come up with various changes or modifications within the scope of the technical idea described in the claims. Of course, it is understood that these also belong to the technical scope of the present invention.

The mixture produced by the method for producing a mixture of fermented fish meal and surface-modified steelmaking slag according to the present invention can be used not only as a fertilizer material for seaweed formation in the sea area but also as a fertilizer material for plants in the land area. Have

Claims (6)

  It is characterized by producing a mixture of fermented fish meal and surface-modified steelmaking slag by fermenting the fishery residue and surface-modifying the steelmaking slag by mixing and leaving the fishery residue and steelmaking slag. A method for producing a mixture of fermented fish meal and surface-modified steelmaking slag.   The method for producing a mixture of fermented fish meal and surface-modified steel slag according to claim 1, wherein the steel slag contains 10% by mass or more of a slag lump having a particle size of 2 mm or less.   After the aquatic residue and the steelmaking slag are mixed and left, the mixture after the leaving is further mixed with the aquatic residue and the steelmaking slag and then left, so that the fermented fish meal and the surface-modified steelmaking slag The method for producing a mixture of fermented fish meal and surface-modified steelmaking slag according to claim 1 or 2, wherein the mixture is produced.   The mixture of fermented fish meal and surface-modified steelmaking slag according to any one of claims 1 to 3, wherein the marine residue is heated or boiled in advance and then mixed with the steelmaking slag. Manufacturing method.   A mixture of fermented fish meal produced by the production method of any one of claims 1 to 4 and a surface-modified steel slag is further added to the marine residue and the steel slag, and the mixture is left to stand to ferment the marine residue. And producing a mixture of fermented fish meal and surface-modified steelmaking slag by modifying the surface of the steelmaking slag to produce a mixture of fermented fish meal and surface-modified steelmaking slag. A seaweed bed creation method comprising administering a mixture of fermented fish meal produced by the method according to any one of claims 1 to 5 and surface-modified steel slag to a sea area as a fertilizer material for seaweed bed creation. .

Images