JP2012217410A - Apparatus and method for feeding solid organic matter decomposition type liquid fertilizer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus for feeding a solid organic matter decomposition type liquid fertilizer that efficiently feeds a nutrient and avoids environmental deterioration by solid organic matter.SOLUTION: The apparatus for feeding the solid organic matter decomposition type liquid fertilizer includes a first elution water tank 3 for eluting iron fulvate in water, a second elution water tank 4 that decomposes solid organic matter in polluted water by a massive cleaning material 20 put inside the tank and prepares a nutrient liquid fertilizer and an elution component-containing water feeding apparatus that selects elution component-containing water in one or both of the elution water tanks of the first elution water tank and the second elution water tank and supplies the water to the sea and supplies the elution component-containing water to the sea. The second elution water tank is arranged so that an aerobic region in which oxygen-containing bubbles rise in water and an anaerobic region apart from the aerobic region alternately appear in the middle of a flow, a cleaning zone is filled with a massive cleaning material, polluted water is alternately passed through the aerobic region and the anaerobic region while being brought into contact with the massive cleaning material in the middle of passing the cleaning zone to decompose solid organic matter in sludge water.

Description

  In order to facilitate the growth of seaweeds such as kombu and promote growth, the present invention particularly provides a solid organic matter decomposition type liquid fertilizer supply device that supplies nutrient salts containing iron humate and the like, nitrogen and phosphorus, etc. to the sea, and The present invention relates to a solid organic matter decomposition type liquid fertilizer supply method.

  In recent years, in coastal areas and the like, seaweeds have been reduced, and burning with lime algae has progressed, and coastal fishery resources such as kelp, sea urchins, and abalone have been significantly reduced. In the past, water-soluble iron fulvic acid (chelates of fulvic acid and divalent iron) produced in the humus soil of the forest flowed from the river. It is said that this is caused by a decrease in the supply of iron fulvic acid. In other words, there is a shortage of organic iron (divalent iron ions) in seawater that is necessary for the aquatic plants to actively carry out photosynthesis, which deteriorates the propagation and growth of aquatic plants such as kelp. It is thought to have caused a decrease in coastal fishery resources such as sea urchins and abalone.

  In order to solve such a problem, for example, coconut fiber bags are filled with humic substances fermented with anaerobic fermented iron, such as coal molten ash and steel slag, and buried in the coastal area, or A method for repairing burnt bonfire that sinks into the sea and gradually releases divalent iron into the sea, thereby supplying iron necessary for the growth of aquatic plants such as seaweeds and diatoms, etc. Technology such as water environment conservation materials has been proposed (Patent Document 1).

JP 2005-34140 A

By the way, the release of the divalent iron-containing material into the sea has been confirmed to have an effect on the growth of seaweed, but according to the study of the present inventor, only the divalent iron-containing material is released into the sea. Instead, supplementation with nutrients such as nitrogen and phosphorus, which promote the growth of seaweeds, proved effective.
However, when simply trying to release nutrient salts such as nitrogen and phosphorus into the sea, the nutrient salts were eluted in a short period of time, and although they were eluted, they did not contribute to the promotion of seaweed growth and the efficiency was extremely low.

  Moreover, if a mixed liquid containing biomass such as fishery processing residues and food processing residues is released into the sea as it is, the content of solid organic matter in the seawater becomes excessive, which causes environmental pollution.

  The present invention has been proposed in view of these circumstances, a solid organic matter decomposition type liquid fertilizer supply device capable of efficiently supplying nutrient salts and avoiding environmental deterioration due to solid organic matter, and a solid It aims at providing the organic matter decomposition type liquid fertilizer supply method.

The present invention has been made in order to achieve the above-described object, and the one according to claim 1 includes a first elution tank capable of eluting iron fulvic acid into water,
Nutrients mainly composed of nitrogen and phosphorus by supplying polluted water, which is a mixture of biomass and water, such as fishery processing residues and food processing residues, and decomposing the solid organic matter of the polluted water with a bulk purification material placed inside A second elution tank for adjusting a nutrient solution fertilizer prepared by dissolving salt in water;
An elution component-containing water supply device capable of selecting and supplying elution component-containing water in either one or both of the first elution water tank and the second elution water tank;
Install
In accordance with the life history of seaweed growing on the seabed, it is a solid organic matter decomposition type liquid fertilizer supply device that selects the elution component-containing water supply device and supplies the elution component-containing water of the elution water tank as liquid fertilizer,
The second elution water tank has a purification zone set between downstream outlets for removing nutrient solution fertilizer from the upstream side where the contaminated water to be treated is placed, and an oxygen-containing gas supply nozzle is provided at the bottom of the purification zone. The aerobic region where the oxygen-containing bubbles supplied from the oxygen-containing gas supply nozzle rise in the water and the anaerobic region outside the aerobic region are provided from the upstream side to the outlet. It arranges so that it may appear alternately in the middle of the flow to which it goes, and the purification zone is filled with a plurality of massive purification materials having a plurality of openings on the surface and forming gaps leading from the openings to the inside, and the purification zone A solid organic matter decomposition type liquid fertilizer supply device that decomposes solid organic matter in sludge water by alternately passing aerobic regions and anaerobic regions while contacting the contaminated water with the bulk purification material in the middle of passing through is there.

  According to a second aspect of the present invention, there is a part of the life history of seaweed, and in the growth period by photosynthesis after the generation of spores, from both the first elution tank and the second elution tank. 2. The solid organic matter decomposition type liquid fertilizer supply device according to claim 1, wherein the elution component-containing water is supplied into the sea, and the supply of the elution component-containing water is stopped from the second elution tank during periods other than the growth period. is there.

  According to a third aspect of the present invention, the bulk purification material is formed by combining a plurality of crushed stones with a binder to form a plurality of irregularities on the surface, and a gap between the crushed stones opens on the surface, and the inside is mutually mutually 3. The solid organic matter decomposition type liquid fertilizer supply device according to claim 1, wherein the purification material uses a plurality of communication paths communicating with each other. 4.

  4. The solid organic matter decomposition type liquid fertilizer according to any one of claims 1 to 3, wherein the water in the first elution water tank and the second elution water tank is fresh water. It is a supply device.

  5. The solid organic matter decomposition type liquid fertilizer according to claim 1, further comprising a circulation path for circulating water from the downstream side to the upstream side of the second elution water tank. It is a supply device.

According to a sixth aspect of the present invention, in a water tank, iron fulvic acid is eluted into water to adjust the iron fulvic acid elution water, and the iron effluent eluted with fulvic acid is moved to the sea area where the seaweed field is formed to enter the seawater. Supplying fulvic acid iron elution water supply process;
In the aquarium, polluted water that is a mixture of biomass and water such as fishery processing residue and food processing residue is supplied, and oxygen-containing bubbles supplied from the oxygen-containing gas supply nozzle at the bottom of the aquarium rise in the water. The aerobic region and the anaerobic region that has deviated from the aerobic region are alternately passed in the middle of the flow, and the aerobic region and the anaerobic region have a plurality of openings on the surface and a gap that leads from each opening to the inside. In the middle of the flow, the solid organic matter in the sludge water was decomposed to dissolve the nutrient salts mainly composed of nitrogen and phosphorus in the water while the contaminated water was in contact with the bulk purification material. After adjusting the nutrient solution fertilizer and making this nitrogen and phosphorus nutrient elution water correspond to the life history of the seaweed in the algae ground, it moves to the sea area during the growth period by photosynthesis after the generation of seaweed spores. Nitrogen and phosphorus nutrient elution water supplied to And a step,
It is the solid organic matter decomposition | disassembly type liquid fertilizer supply method characterized by including.

According to the present invention, the elution component-containing water is selected by the elution component-containing water supply device in accordance with the life history of seaweed growing on the seabed and supplied to the sea. Efficient and efficient nutrient supply can be performed, and water containing elution components that elutes nutrients mainly composed of nitrogen and phosphorus can be supplied in conformity to the growth timing of seaweed, improving efficiency. A synergistic effect with the promotion of reproduction and growth by supplying iron fulvic acid can be expected.
In particular, during the growth period, which is a part of the seaweed life history and where photosynthesis is performed, water containing elution components is supplied into the sea from both the first elution tank and the second elution tank. When the supply of elution component-containing water is stopped from the second elution water tank at the time, the improvement in efficiency is significant compared to the conventional case.
In addition, the installation of the conventional method is limited to cobblestones and rocks, but this technology eliminates the need for large-scale construction on the seabed or coast, minimizing changes to the natural environment. It can be installed in the inland area, not on the coast or coastal area, and liquid fertilizer can be manufactured, transported to the coastal area, liquid fertilizer can be sprayed, and the system can be installed anywhere.
And when the propagation and growth of seaweed is promoted, it can be efficiently recovered even in the sea where it has been burnt, and when seaweed grows in the seaweed bed, fixation of carbon dioxide is promoted by active photosynthesis. Contributes to the recovery of the natural environment.
Furthermore, when adjusting nutrient salts mainly composed of nitrogen and phosphorus, contaminated water, which is a mixture of biomass and water, such as fishery processing residues and food processing residues, is supplied to the aquarium, and oxygen at the bottom of the aquarium The aerobic region where the oxygen-containing bubbles supplied from the contained gas supply nozzle rise in water and the anaerobic region deviating from the aerobic region are alternately passed in the middle of the flow, and the aerobic region and the anaerobic region Filled with multiple bulk purification materials with multiple openings on the surface and gaps leading from each opening to the inside, and decomposes solid organic matter in sludge water while bringing contaminated water into contact with the bulk purification material in the middle of the flow As a nutrient solution fertilizer is prepared by dissolving nutrient salts mainly composed of nitrogen and phosphorus in water, solid organic matter (SS) and biochemical oxygen supply (BOD) increase significantly even if biomass is used. Environmental degradation of the sea area such as Can be prevented.

It is sectional drawing of the surroundings of a seaweed field which shows the area | region from the coastline vicinity used as a seaweed field to the land. It is explanatory drawing which shows schematic structure of the 2nd elution tank of a solid organic matter decomposition | disassembly type liquid fertilizer supply apparatus, (a) is a partial cutaway sectional view, (b) is a top view, (c) is the 2nd elution tank. Explanatory drawing which shows the reduction | decrease in an aerobic area | region, an anaerobic area | region, solid organic matter (SS), and biochemical oxygen supply amount (BOD) in the inside, (d) is a perspective view of the bulk purification material with which it fills in the 2nd elution water tank. FIG. It is explanatory drawing of the life history of a kombu. It is component analysis tables, such as steelmaking slag and clinker ash. It is a graph which shows humic acid iron content of dam sedimentary soil.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
FIG. 1 is a schematic explanatory view showing a configuration of an embodiment of a solid organic matter decomposition type liquid fertilizer supply device installed in a region from a sea area to a coast serving as a seaweed bed, and FIG. 2 is a schematic diagram of a second elution tank. It is explanatory drawing which shows a structure.
This solid organic matter decomposition-type liquid fertilizer supply device 1 includes a first elution tank 3 capable of eluting iron fulvic acid into water on the coast near the shallow sea that becomes the seaweed bed 2 (land side from the coastline), A second elution tank 4 that adjusts nutrients such as nitrogen and phosphorus in a state in which it can be eluted in water, a water tank 5 that supplies water to the first elution tank 3 and the second elution tank 4, An elution component-containing water supply device capable of selecting and supplying the elution component-containing water in either one or both of the first elution water tank 3 and the second elution water tank 4 to the sea; According to the life history of seaweeds such as kombu grown on the sea floor, it is selected by the elution component-containing water supply device, and the elution component-containing water in the aquarium is directly supplied into the sea as liquid fertilizer in a timely manner. .
When the first elution water tank 3 and the second elution water tank 4 are installed in the vertical direction as in the present embodiment, the installation area of the entire apparatus is small, and the space efficiency is good.

  The first elution water tank 3 is a water tank that mainly elutes fulvic acid iron into water, and is installed with the bottom surface slightly inclined downward toward the sea side, and a plurality of fulvic acid iron elution units 6 are placed therein. When this iron fulvic acid elution unit 6 is immersed in the supplied water, iron fulvic acid can be eluted.

  The iron fulvic acid elution unit 6 placed in the first elution tank 3 is a solid organic state obtained by collecting sediments such as humic substances deposited on the bottom of a dam lake and solidifying them in an ion elution container (not shown). And an iron-containing substance.

First, the ion-eluting container will be described.
This ion-eluting container is a bag, a box, a cage, or the like in which the humus housed therein dissolves and divalent iron ions and iron fulvic acid can be eluted. Specifically, inorganic chemical material fibers such as polyvinyl chloride and polyethylene, bags formed using plant fibers such as coconut palm and hemp, boxes formed using porous materials, metal wires, etc. There is a basket molded into a bowl. For example, an inner bag formed by stacking coconut palm fibers (palm flea fibers) having both environmental adaptability and durability on a mat shape having a thickness of 10 to 15 mm, and a palm net covering the outside of the inner bag It is a double-structured bag body, and a predetermined amount of the above-mentioned solid organic state and iron-containing substance is put into the inner bag, and the opening is stitched and sealed.

Next, the solid organic state will be described.
This solid organic state may be obtained by, for example, collecting and solidifying sediments such as humus deposited on the bottom of a dam lake.
Organic matter such as earth and sand and fallen leaves flowing from the river is deposited at the bottom of the dam lake. Minerals such as earth and sand flow into the dam lake and when the flow velocity becomes slow, the specific gravity is large, so the sediment is relatively quick, and the one with a larger particle size sinks earlier. Therefore, they tend to accumulate at points far from the dam body such as the river inflow area of the dam lake. On the other hand, fallen leaves and twigs have a low specific gravity, so they are difficult to sink after flowing into the dam lake, so they drift in the dam lake and settle near the dam body. For this reason, it is desirable to collect the humus used from the bottom of the lake near the dam body. And organic matter such as fallen leaves and twigs grown in the mountains deposits and humus in the water without touching the air in the bottom of the dam lake, especially near the dam embankment. Then, anaerobic fermentation is performed, and humic acids such as fulvic acid and humic acid are accumulated. The accumulated deposit (precipitate) also contains organic acid iron, so if it is solidified, it becomes solidified organic state, which corresponds to iron fulvic acid, and it is eluted with iron fulvic acid. It is suitable as a material for the unit 6. Moreover, because the sediment from the dam lake is collected and used as a material for new applications, it has the first advantage that it can be used as a natural harmless resource, unlike industrial waste. There is a second merit that it can increase and purify water.

  To collect sediment (mud) containing humus and fine earth and sand, use a mud sand pump suspended from a crane ship to the bottom of the lake. Pumped up and transported to land dehydration facility. Then, it is precipitated in a settling tank of a dehydration treatment facility, and then the precipitate is dehydrated by a dehydration device, and the dehydrated cake is conveyed to a solidification treatment device by a belt conveyor, and solidified into a granular solid organic state by this solidification treatment device. . And the solid organic state solidified in this way is conveyed to a packaging device and packaged.

  The amount of fulvic acid and humic acid contained in the sediment deposited on the bottom of the dam lake is in the order of 1%. 10% order. Further, from the morphological analysis of iron bound to these fulvic acid and humic acid, it has been confirmed that the iron is chelated with a functional group containing oxygen such as a carboxyl group.

  Further, the iron fulvic acid elution unit 6 used in the present invention contains divalent iron that is chelate-bonded even if it is only a solid organic state that is collected from the bottom of a dam lake and subjected to dehydration treatment. However, the iron-containing material may be added with a divalent iron-containing material such as clinker, coal gasification slag, or steelmaking slag from a thermal power plant.

  When such a fulvic acid iron elution unit 6 is installed in the first elution water tank 3 and immersed in seawater, the fulvic acid iron contained in the solid organic state is eluted into the water from the inside of the ion-eluting container. Then, the divalent iron ion of the iron-containing substance is combined with solid organic fulvic acid as a chelating agent (complex) to form fulvic acid iron, and this newly bound fulvic acid iron enters seawater from the inside of the ion-eluting container. To elute. In the iron fulvic acid elution unit 6, iron fulvic acid is formed by chelate bonding with iron-containing substances such as clinker. In this embodiment, the alkali-adjusted iron-containing substance in the iron fulvic acid elution unit 6 functions as an inhibitor that delays the elution of divalent iron ions. The rate at which divalent iron ions such as clinker and coal gasification slag described above combine with solid organic fulvic acid as a chelating agent (complex) to form fulvic acid iron is simply mixing iron-containing substances and humic substances. It is much more gradual than just conventional water environment conservation materials. Therefore, it was thought that this binding of iron fulvic acid would continue for a long period of time compared with the conventional one, but the steelmaking slag adjusted with alkali has a pH of 9.5 and has a strong alkalinity. There is a high possibility of neutralizing weakly acidic dam deposits and extremely suppressing the elution of high concentrations of iron humate in dam deposits. For example, as shown in FIG. 5, it was confirmed that the humic substance content of Nita dam 28 ppm was reduced to 3 ppm by mixing steelmaking slag. Therefore, when using dam sedimentary soil, it became clear that it was more effective to mix clinker ash and IGCC coal gasification slag, which are low-alkaline power by-products. And since the ion elution container of the fulvic acid iron elution unit 6 shown in this embodiment is made of coconut fibers (palm flea fibers), the degeneration rate is slow, and the contents are retained for a long period of 10 years or more. Continue to elute valent iron ions and iron fulvic acid. Also, against the bacteria contained in the dam deposits of fermented material, palm flea fibers are rich in salt and have strong resistance among plant fibers.

In the above-described embodiment, when the clinker (PH8.1 density: 2.019 g / cubic centimeter) and IGCC coal gasification slag (PH8.1 density: 2.928 g / cubic centimeter), which are power by-products, are used, they are made of steel. A retarder (retarder) that suppresses the elution of divalent iron ions in dam deposits containing high concentrations of iron humate because PH is closer to neutral than slag (PH 9.5 density 3.402 g / cm3) ) Is suitable for use in anticipation of its role as manganese, and manganese (MnO) has a large amount of steelmaking slag as shown in FIG. 4, causing white turbidity, and phosphorus ions (P ₂ O ₅ ) There are many electricity by-products, and it becomes nutrient salt in the seaweed bed. Silicon ions (SiO ₂ ) have an overwhelmingly large power by-product, are useful for planktonic plankton, and are also suitable for oyster farming. Calcium ions (CaO) have an overwhelming amount of steelmaking slag and increase alkalinity. From these points, it was confirmed that power slag is more effective than steelmaking slag.

  Next, the second elution water tank 4 will be described. The second elution aquarium 4 has a larger capacity than the first elution aquarium 3 described above, and the bottom portion is inclined downward from the land-side end of the aquarium located on the far side of the land toward the sea-side end. 1 and FIG. 2 are arranged below the first elution water tank 3, and a pulverizer 7 and a mixer, which are biomass pretreatment facilities, at the land-side end of the water tank. 8 is provided in the upper part, the outlet 10 is provided in the lower part of the sea end, and the water flows from the land-side inlet 9 toward the sea-side outlet 10. A region between the downstream outlet 10 where the nutrient solution fertilizer is extracted from the upstream side where the contaminated water to be treated is placed is set as the purification region 11, and the organic matter can be decomposed while flowing through the purification region 11. Therefore, at the bottom of the purification zone 11 of the second elution tank, an air supply pipe 12 is disposed in a direction orthogonal to the internal flow direction (from the land side to the sea side), and a plurality of oxygen is provided in the air supply pipe 12. The contained gas supply nozzles 13 are provided at predetermined intervals, and a plurality of the air supply pipes 12 are provided in parallel along the flow direction at predetermined intervals, whereby an oxygen-containing gas supply nozzle (hereinafter, nozzle) is provided. An aerobic region (also referred to as an aeration region or an aerobic region) 11a in which oxygen-containing bubbles supplied from 13 rise in water and an anaerobic region (also referred to as an anaerobic region) 11b that deviates from the aerobic region 11a are described above. It is comprised so that it may appear alternately in the middle of the flow which goes to an outflow port from an upstream. The second elution water tank 4 is filled with a plurality of mass purification materials 20, and the polluted water in which the biomass is dissolved in water is purified by these mass purification materials 20.

The mass purification material 20 has a plurality of irregularities on the surface. For example, aggregates 21 having an equivalent diameter of about several centimeters are gathered, and the contacts of the aggregates 21 are joined with a binder such as cement or epoxy adhesive. Thus, it has a substantially spherical shape with an equivalent diameter of about 7 to 15 centimeters. The equivalent diameter refers to the diameter of a spherical body having a volume substantially equal to the volume of the lump-shaped body.
In such a mass purification material 20, the aggregate 21 is assembled in a substantially spherical shape and joined, so that the actual surface area becomes large due to innumerable irregularities, and the biofilm formation area increases due to the increase in the surface area. . Further, the unevenness easily forms turbulent flow, and as will be described later, contact between oxygen gas (for example, air) to be diffused (aerated) and polluted water increases, and aerobic treatment can be performed quickly. In addition, when this aggregate purification material 20 is selected as an aggregate 21 of a centimeter order, the gap between the aggregates is about 1 to 3 cm, and this gap becomes a recess or the mass purification material 20 It becomes the opening part 22 opened to the surface, and the back part of the gap becomes a communication path (not shown) and communicates with another gap (communication path). If the opening 22 of the gap is too large, a flow penetrating the inside of the communication path is likely to occur, which is not preferable as an anaerobic microorganism growth environment. Therefore, by appropriately selecting the size of the aggregate 21, the size of the aggregate 21 is about 1 to 5 cm. It is desirable to form the opening 22.

Next, the purification action in a state where the purification material 20 having the above-described configuration is filled in the purification region 11 of the second elution water tank 4 will be described.
The mass purification material 20 functions as a biofilm formation body for aerobic treatment on the surface, and also moves solid organic matter (SS) in the direction of the opening on the surface to flow and capture from the contaminated water to the opening 22. Since it functions as a resistor for forming a flow velocity difference (speed gradient) for the purpose, and further, it functions as an anaerobic treatment region for anaerobic treatment by retaining the SS captured in the opening 22 in the gap inside thereof. It is possible to purify the polluted water by effectively acting on inorganic and organic fine solids, dissolved pollutants, etc. floating in the polluted water. That is, the mass purification material 20 is formed with a biofilm on the surface thereof, while an oxygen-containing gas (hereinafter simply referred to as oxygen gas) is diffused from the bottom of the water tank in a direction perpendicular to the polluted water flow and rises. Therefore, the turbulent flow area is formed in the polluted water flow at the same time as the polluted water flowing through the purification zone 11 and the oxygen gas are sufficiently contact-mixed. Therefore, in the vicinity of the mass purification material 20 filled and disposed in the aerobic region 11a where oxygen gas is diffused from the bottom in the purification region 11, the generation of a boundary layer such as a boundary film is suppressed, and aerobic is performed quickly and efficiently. As the treatment proceeds, the soluble contaminant (BOD) dissolved in the polluted water is easily aerobically treated and reduced. The treated soluble contaminant (BOD) is decomposed into carbon dioxide gas and water if it is an organic substance occupying most of it, and other components such as phosphorus and nitrogen remain in the water.

The bulk purification material 20 is a resistor in the polluted water circulation area, and the laminar flow area is formed at the same time as reducing the flow velocity in the vicinity of the mass purifying material 20 and creating a flow velocity difference (velocity gradient) in the polluted water flow around the purifying material. The As described above, the aerobic region 11a (aeration region) where oxygen gas is diffused tends to be a turbulent region, whereas the anaerobic region (anaerobic region or non-aeration region) outside the aerobic region 11a. In 11b, a laminar basin is formed. For this reason, in the anaerobic region 11b, the fine solid matter (SS) (mostly organic matter) floating in the polluted water moves by being given rotational energy due to the generated flow rate difference, and around the massive purification material 20 having a low flow rate. To reach the laminar basin. Further, in the aerobic region 11a described above, a part of SS is aerobically treated by adsorbing on the biofilm on the surface of the bulk purification material 20, but most of the SS is adjacent by the random flow in the turbulent region. Is sent in the direction of the anaerobic region 11b, and finally reaches the laminar flow region around the mass purification material 20 in the anaerobic region 11b.
Furthermore, the SS that has flowed and separated to the laminar flow area around the mass purification material 20 is captured by the opening 22 on the surface and accumulated in the internal communication path from the opening 22.

  Since the inside of the communication path of the bulk purification material 20 is a stagnant area where there is almost no flow, the SS stays in the communication path as it is and is anaerobically treated to be liquid-solubilized. After this liquid solubilization, the surface of the mass purification material 20 in the aerobic region 11a in the aerobic region 11a, as described above, flows downward in the communication path by its own weight, flows out from the opening 22 into the circulating polluted water and dissolves. It is aerobically treated with carbon dioxide and water. By repeatedly performing these processes, as shown in FIG. 2C, the dissolved BOD and the floating SS are reduced for a while, and finally, both are hardly decomposed.

  In this way, the purification treatment in the second elution water tank 4 is efficient in order to provide the treatment areas suitable for different purification in the same purification area 11 with the dissolved BOD and the floating SS in the contaminated water. Purification is performed. That is, for the soluble BOD, oxygen gas is supplied on the surface of the mass purification material 20 so that the aerobic treatment is performed quickly, while for SS, the opening 22 of the mass purification material 20 is used. Capturing and staying in the internal communication path to anaerobic treatment. Since the SS anaerobic treatment can be performed almost independently of the purification treatment residence time of the polluted water flowing through the purification zone 11, the residence time of the polluted water in the purification zone 11 is shortened. The aerobic bacteria subjected to the aerobic treatment are anaerobic region 11b, the anaerobic bacteria subjected to the anaerobic treatment are killed by the environmental change in the aerobic region 11a, and the bacteria that are not killed by the environmental change are in the communication path of the bulk purification material 20. When the treatment in the second elution water tank 4 is completed, various bacteria are killed, and eventually the dead bodies are also decomposed and returned to carbon dioxide and water. Therefore, the phosphorus and nitrogen components contained in the polluted water remain in the water after being treated in the second elution tank 4, and the nutrient salt in which the nutrient salt mainly composed of nitrogen and phosphorus is dissolved in water. It becomes liquid fertilizer.

  The second elution tank 4 is supplied with contaminated water, which is a mixture of biomass and water, such as fishery processing residues and food processing residues. For this reason, in this embodiment, the land side of the second elution tank 4 is used. A crusher 7 and a mixer 8 are provided on the end. Then, for example, biomass such as fish waste is finely pulverized by a pulverizer, the pulverized product is transferred to a mixer 8 and mixed with water, stirred and dissolved in water to make contaminated water, and then the contaminated water is secondly mixed. It injects from the inflow port 9 at the land side end of the elution water tank 4. The pulverized biomass may be mixed with water at the stage of stirring with the mixer 8 to adjust the biomass concentration to a predetermined level. However, a certain amount of water is added with the mixer 8 to obtain thick polluted water. After pouring into the elution water tank 4, water may be further added to dilute to a predetermined concentration.

Biomass is not limited to fishery processing residues or food processing residues, but can be used as long as it contains nitrogen, phosphorus and organic matter. For example, living residues and sludge fermentation substances discharged in fishing village environments But you can. This sludge fermented substance is generally used as a fertilizer for sludge fermentation, and as its main components, it contains 5.15% total nitrogen, 6.26% total phosphorus, and 0.39% total potassium. However, the expected N: P in seawater is 7: 1.
As described above, garbage and processed residues generated in a fishing village can be mixed and processed, thereby improving the fishing village environment and contributing to the conservation of the water environment.

  Next, a water supply system for supplying water to the first elution water tank 3 and the second elution water tank 4 will be described. The water used in the present invention is preferably fresh water, and in this embodiment, a water tank 5 is installed on the first elution water tank 3, and the water pumped up from a nearby river, for example, in this water tank 5. Store groundwater and domestic wastewater pumped up from the ground. The mixer 8, the first elution water tank 3, the second elution water tank 4, and the like can be supplied with water as necessary through a water supply pipe 30 connected to the water tank 5. In addition, a valve (not shown) is provided in the middle of the water supply pipe 30, and a water supply destination can be appropriately selected and the amount of water supplied can be adjusted by opening and closing the valve.

  Next, an elution component-containing water supply device capable of selecting the elution component-containing water in one or both of the first elution water tank 3 and the second elution water tank 4 and supplying it to the sea will be described. To do. A first elution water outlet 31 is opened slightly below the maximum water level of the first elution water tank 3, and a second elution water outlet 32 communicating with the outlet 10 at the sea end of the second elution water tank 4 is opened. Then, the pipes connected to the elution water outlets 31 and 32 as an elution component-containing water outflow system are joined by a sterilization apparatus 33 on the way, the inlet side of the adjustment tank 34 is connected to the outlet of the sterilization apparatus 33, and the outlet of the adjustment tank 34 The elution component-containing water supply pipe 35 is connected to the inlet, and the elution component-containing water supply pipe 35 is extended into the sea. It flows into the sea area. Further, first and second outflow valves (not shown) are respectively provided between the first elution water outlet 31 and the second elution water outlet 32 and the sterilizing device 33 that joins, and the adjustment tank 34 and the water are provided. A water injection valve is provided in the middle of the water supply pipe connecting the tank 5. Therefore, by operating these first and second outflow valves, the elution component-containing water in one of the first elution water tank 3 and the second elution water tank 4 is supplied to the adjustment tank 34. Select appropriately, adjust the amount, and inject water from the water tank 5 and supply it diluted to an appropriate concentration, or supply the elution component-containing water in both elution tanks to the sea Or select a source to supply to the sea. If both the outflow valves are closed at the same time, the supply from either the first elution water tank 3 or the second elution water tank 4 can be stopped. And although the above-mentioned outflow valve may be operated manually, it is desirable to use an electric valve such as an electromagnetic valve that can be electrically operated by a control device described later. The elution component-containing water supply pipe 35 is preferably configured so that a plurality of holes are opened not only at the outlet 36 at the front end but also at a front side thereof and water can be supplied in a wide range from these holes.

Further, in order to select and supply the elution component-containing water in the first and second elution water tanks 3 and 4 to the sea, the above-described water tank 5 is provided without providing the first and second outflow valves. The first and second elution water tanks 3 and 4 may be controlled by two water supply valves called first and second water supply valves. For example, when both the first and second water supply valves are opened, water can be supplied to the first and second elution water tanks 3 and 4, so that the first elution water outlet of the first and second elution water tanks 3 and 4, The elution component-containing water flowing out from the second elution water outlet can be supplied to the sea through the elution component-containing water supply pipe 35. When the first water supply valve is opened and the second water supply valve is closed, the first elution water is supplied. Since water is supplied only to the water tank 3, the elution component-containing water flowing out from the first elution water tank 3 can be supplied to the sea via the elution component-containing water supply pipe 35 (iron fulvic acid elution water supply). Process). When the second water supply valve is opened, seawater is supplied to the second elution water tank 4, so that the elution component-containing water flowing out from the second elution water tank 4 passes through the elution component-containing water supply pipe 35 to the sea. (Nitrogen and phosphorus nutrient elution water supply step). In addition, while providing a 1st, 2nd water supply valve, you may provide a 1st, 2nd outflow valve.
Further, as shown by a dotted line in FIG. 2, a circulation path 50 and a pump 51 for returning water from the outlet 10 of the second elution water tank 4 to the inlet 9 of the water tank are provided to circulate water to be treated. Good. When water is circulated in this manner and repeatedly flowed a plurality of times, the length of the second elution water tank 4 in the flow direction can be shortened, and the size reduction can be achieved.

  As described above, the divalent iron ions eluted from the fulvic acid iron elution unit 6 become fulvic acid iron, and this fulvic acid iron is replenished to the sea area 2, which is suitable for the growth of seaweeds such as the kombu 40. The environment is improved. Specifically, it becomes a nutrient for seaweed such as the kombu 40, and can promote the growth of the seaweed. In particular, it can greatly promote the reproduction, thereby shortening the recovery of firewood burning. Corresponding to the history, the elution component-containing water to be replenished to seawater is selected and supplied by the above-described elution component-containing water supply device, so that the efficiency is improved, and the elution unit can be used for a long time.

Hereinafter, the life history of seaweed will be described by taking the comb 40 as an example, and the relationship with the eluted component-containing water will be described.
FIG. 3 is a schematic diagram showing the life history of the kombu 40.
Comb 40 is
A) Cells on the surface of the alga develop to become sporangia, and the spores mature from summer to autumn,
B) In general, meiosis occurs from autumn to early winter when the seawater temperature falls below 10 ° C, and 100 million to more than 100 million zoospores (spores) are released from the ascending sac, and are swimming on the bedrock while swimming in the sea. To settle.
C) After growing, the cilia are dropped and germinate to begin to grow, develop into female gametophytes and male gametophytes, and become new leaf bodies (juvenile bodies) from midwinter to early spring.
D) The female gametophyte forms an ovum when mature, and the male gametophyte forms a sperm (spermatozoon) when mature, and the sperm can swim like a zoospore.
E) When the sperm reaches the ovum, fertilization takes place, and the fertilized egg immediately divides and generates spores, and gradually grows into spores until late April to May (from late winter to early spring). Photosynthesis is actively performed in the growth period after the generation of spores.
F) The spores grow further from late spring to early summer and become the first year of the Kombu 40.
G) The kombu 40 matures from summer to autumn, grows into a spore having an ascending spot, finishes the first year, and returns to (A) after the fall.
And in the period from autumn to winter (especially winter) when this gametophyte matures, the maturity of the male and female gametophy increases as the concentration of the chelated divalent iron component increases. Specifically, it has been confirmed that the development to male and female gametophytes is promoted at 0.01 mg / L or more.
In addition, not only in the maturation stage of the gametophyte, but also in the winter from zoospore release to gametophyte development to fertilization to sporophyte formation, it is significant when clinker, coal gasification slag and artificial humic substances are combined A fertilizing effect was observed, and it was confirmed that the effect of chelated divalent iron was great.
Furthermore, it has been confirmed that in the summer when spores grow, fertilization with a combination of clinker, coal gasification slag, and artificial humic substances is more effective than clinker and slag alone.

  And, since the fertilized spores are generated and the cell division becomes active and grows into spores, photosynthesis is actively performed during the late winter to early spring period, for example, from February to May. It has been confirmed that when nutrient salts containing nitrogen and phosphorus as main components are supplemented, growth is further promoted and growth is efficiently performed.

Therefore, as for the operation of the solid organic matter decomposition type liquid fertilizer supply apparatus 1 described above, for example, when supplying nutrient salts corresponding to the life history of the kombu 40, the fulvic acid eluted in the first elution tank 3 is used. Supplying iron-containing water into the sea throughout the year, and nutrient-containing water such as nitrogen and phosphorus eluted in the second elution tank 4 only needs to be supplied for two to five months when growth by photosynthesis is active. .
In this way, if the supply period of water containing nutrient salts such as nitrogen and phosphorus is limited to the growth period of the kombu 40, the elution rate of the nutrient unit 7 such as nitrogen and phosphorus is fast and the usable period (life cycle) is increased. Even if it has a short characteristic, it is possible to increase the effect of balancing fertilization amount and growth promotion by specifying the fertilization time and applying fertilization without excess or deficiency, and supply of nutrient salts without waste Can be made possible.

  In contrast, the iron fulvic acid elution unit 6 has a slower elution rate and a longer usable period (life cycle) than nutrient salts such as nitrogen and phosphorus, and the entire life history of the kombu 40. The fertilizing effect of iron fulvic acid can be expected in Japan, and since it is relatively inexpensive, it is desirable to supply continuously throughout the year.

When replenishing nitrogen and phosphorus elution water for a limited period of 2 to 5 months, the operator manually operates the second water supply valve and the second outflow valve of the second elution water tank 4. Alternatively, it may be configured in advance so as to be set as a timing condition in the timer of the control device so that the valve of the second elution tank 4 is automatically opened and closed when the timer satisfies this timing condition. Good.
The control device has a known microcomputer configuration including a CPU, ROM, RAM, etc., and has a timer with a clock circuit, and operates the operation unit to open and close the valve at a desired time. It is possible to set the timing conditions.

  In addition, the temperature condition is set in advance in conjunction with the setting of the above-described timing condition, and when the temperature condition is satisfied and the timing limitation is satisfied, the valve of the second elution water tank 4 is turned on. It may be configured to be opened and replenished with nutrient salt elution water such as nitrogen and phosphorus. For example, a temperature sensor (not shown) for detecting the temperature of the seawater is provided, and the control device monitors the seawater temperature based on a signal from the temperature sensor. You may comprise so that the said valve of the 2nd elution water tank 4 may be opened and closed at the time of satisfy | filling.

  The water supplied to the first and second elution water tanks 3 and 4 is preferably the above-described fresh water, but is not limited to this, and nutrient salts such as divalent iron, nitrogen, and phosphorus can be eluted. Any water that can be poured into seawater without causing environmental pollution may be used. For example, it may be water from a river near the coast, water from a pond or lake, or seawater although efficiency is reduced. Moreover, although the 1st elution water tank 3 and the 2nd elution water tank 4 were made separate in the above-mentioned embodiment, you may make it function as two water tanks by partitioning the inside of one big water tank with a partition wall. Further, in the above-described embodiment, the liquid fertilizer adjusted in the first and second elution tanks 3 and 4 is directly discharged into the sea through the elution component-containing water supply pipe 35, but the present invention directly flows into the sea. Not limited to. For example, the solid organic matter decomposition type liquid fertilizer supply device 1 is installed not in the coast and coastal areas but in the inland area to produce liquid fertilizers. May be sprayed on.

  Moreover, although the example which fertilizes according to the life history of the kombu 40 was given in above-described embodiment, the seaweed used as the object of this invention is not limited to the kombu 40. For example, seaweeds that repeat similar life histories include arame, kajime (comb 40), akamoku (Honda), licorice (proboscis), and laver, and these seaweeds may be targeted.

  Alame, Kajime, etc. mature in autumn and grow into male and female gametophytes when the released zoospore settles. The sperm from the male gametophyte fertilizes with the egg of the female gametophyte, and the fertilized egg settles into a sporophyte (juvenile) that grows greatly in the spring. Therefore, when targeting arame, scallops, etc., iron fulvic acid elution water is supplied throughout the year, and nitrogen and phosphorus nutrient elution water is supplied during the growth period of 2-6 months.

  In red moss, zoospores released from mature spores become male and female gametes and fertilize eggs on the genital floor. When a fertilized egg settles on the bedrock, it germinates, grows into a young body, and becomes a young spore. When the water temperature begins to fall from around December, it grows, grows greatly from spring to early summer, matures and releases zoospores, which repeats every year. Therefore, in the case of targeting red foxtail, the fulvic acid iron elution water is supplied throughout the year, and the nitrogen and phosphorus nutrient elution water is supplied during the growth period of 1 to 4 months.

  Even though it has a different degree of growth and longevity depending on the sea area and water depth, in many regions, about half a year is from May to October, and the growth period is from December to May. Therefore, in the case of target species such as primrose, the fulvic acid iron elution water is supplied throughout the year, and the nitrogen and phosphorus nutrient elution water is supplied in the growth period of 12 to May.

DESCRIPTION OF SYMBOLS 1 Solid organic matter decomposition | disassembly type liquid fertilizer supply apparatus, 2 Algae basin, 3rd elution water tank, 4 2nd elution water tank, 5 Water tank, 6 Fulvic acid iron elution unit, 7 Crusher, 8 Mixer, 9 Inlet, 10 Outlet, 11 Purification area, 11a Aerobic area, 11b Anaerobic area 11b, 12 Air supply pipe, 13 Oxygen-containing gas supply nozzle, 20 Bulk purification material, 21 Aggregate, 22 Opening, 30 Water supply pipe, 31 First elution Water outlet, 32 Second elution water outlet, 33 Sterilizer, 34 Adjustment tank, 35 Elution component-containing water supply pipe, 36 Elution component-containing water supply pipe outlet, 40 Kombu, 50 Circulation path, 51 Circulation pump

Claims (6)

A first elution tank capable of eluting fulvic acid iron into water;
Nutrients mainly composed of nitrogen and phosphorus by supplying polluted water, which is a mixture of biomass and water, such as fishery processing residues and food processing residues, and decomposing the solid organic matter of the polluted water with a bulk purification material placed inside A second elution tank for adjusting a nutrient solution fertilizer prepared by dissolving salt in water;
An elution component-containing water supply device capable of selecting and supplying elution component-containing water in either one or both of the first elution water tank and the second elution water tank;
Install
In accordance with the life history of seaweed growing on the seabed, it is a solid organic matter decomposition type liquid fertilizer supply device that selects the elution component-containing water supply device and supplies the elution component-containing water of the elution water tank as liquid fertilizer,
The second elution water tank has a purification zone set between downstream outlets for removing nutrient solution fertilizer from the upstream side where the contaminated water to be treated is placed, and an oxygen-containing gas supply nozzle is provided at the bottom of the purification zone. The aerobic region where the oxygen-containing bubbles supplied from the oxygen-containing gas supply nozzle rise in the water and the anaerobic region outside the aerobic region are provided from the upstream side to the outlet. It arranges so that it may appear alternately in the middle of the flow to which it goes, and the purification zone is filled with a plurality of massive purification materials having a plurality of openings on the surface and forming gaps leading from the openings to the inside, and the purification zone A solid organic matter decomposing type liquid fertilizer supply device that decomposes solid organic matter in sludge water by alternately passing an aerobic region and an anaerobic region while contacting the contaminated water with the bulk purification material in the middle of passing through.   During the growth period of photosynthesis after the generation of spores, which is part of the life history of seaweed, water containing elution components is supplied into the sea from both the first elution tank and the second elution tank. The solid organic matter decomposition type liquid fertilizer supply device according to claim 1, wherein the supply of the elution component-containing water is stopped from the second elution tank during periods other than the growth period.   The mass purification material is formed by combining a plurality of crushed stones with a binder to form a plurality of irregularities on the surface, and a gap between crushed stones opens on the surface, and a plurality of communication paths communicating with each other inside. The solid organic matter decomposition type liquid fertilizer supply device according to claim 1 or 2, wherein a purification material is used.   4. The solid organic matter decomposition type liquid fertilizer supply device according to claim 1, wherein water in the first elution water tank and the second elution water tank is fresh water. 5.   The solid organic matter decomposition type liquid fertilizer supply device according to any one of claims 1 to 4, further comprising a circulation path for circulating water from the downstream side to the upstream side of the second elution water tank. In the aquarium, iron fulvic acid elution water is prepared by eluting the fulvic acid iron elution water and adjusting the fulvic acid iron elution water to the sea area where the fulvic acid iron elution water is supplied and supplying it into seawater. When,
In the aquarium, polluted water that is a mixture of biomass and water such as fishery processing residue and food processing residue is supplied, and oxygen-containing bubbles supplied from the oxygen-containing gas supply nozzle at the bottom of the aquarium rise in the water. The aerobic region and the anaerobic region that has deviated from the aerobic region are alternately passed in the middle of the flow, and the aerobic region and the anaerobic region have a plurality of openings on the surface and a gap that leads from each opening to the inside. In the middle of the flow, the solid organic matter in the sludge water was decomposed to dissolve the nutrient salts mainly composed of nitrogen and phosphorus in the water while the contaminated water was in contact with the bulk purification material. After adjusting the nutrient solution fertilizer and making this nitrogen and phosphorus nutrient elution water correspond to the life history of the seaweed in the algae ground, it moves to the sea area during the growth period by photosynthesis after the generation of seaweed spores. Nitrogen and phosphorus nutrient elution water supplied to And a step,
The solid organic matter decomposition | disassembly type liquid fertilizer supply method characterized by including.

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