Calcium hydroxide cartridge and wastewater treatment device

Abstract

The objective is to provide a calcium hydroxide cartridge and wastewater treatment device that can stably maintain the pH of wastewater at a strongly alkaline level. [Solution] The calcium hydroxide cartridge 10 comprises a first permeable container 13 containing calcium hydroxide having a first particle size, a second permeable container 14 containing calcium hydroxide having a second particle size larger than the first particle size, and a cylindrical container 11 for discharging wastewater that has been introduced through an upper opening 101 and discharged through a lower opening 102, with the first and second permeable containers arranged inside.

Description

Technical Field

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[0001] The present invention relates to a calcium hydroxide cartridge and a wastewater treatment apparatus for treating wastewater discharged from restaurants, food processing factories, and the like.

Background Art

[0002] Wastewater discharged from kitchens in the food service industry, school lunch facilities, food processing factories, and the like contains a large amount of organic substances such as fats, oils, and proteins. When such wastewater flows into the sewage, it causes water pollution and bad odors. Therefore, various wastewater treatment materials and equipment for purifying or deodorizing the wastewater have been studied.

[0003] For example, Patent Document 1 describes a wastewater treatment material for immobilizing and removing organic components contained in wastewater. The wastewater treatment material contains calcium hydroxide, and an aqueous solution of calcium hydroxide is strongly alkaline, so it has a bactericidal and deodorizing effect. By keeping the pH of the wastewater stably strongly alkaline using calcium hydroxide, the deodorizing effect can be enhanced.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, if the wastewater treatment material is not constantly immersed in water, the calcium hydroxide contained in the wastewater treatment material solidifies, resulting in stagnant water flow and a decrease in the pH adjustment function.

[0006] The present invention has been made in view of the above problems, and an object thereof is to provide a calcium hydroxide cartridge and a wastewater treatment apparatus that can stably maintain the pH of wastewater at a strongly alkaline level. Furthermore, the objective is to provide a wastewater treatment device that can prevent calcium hydroxide contained in the wastewater treatment material from solidifying. [Means for solving the problem]

[0007] To solve the above problems, the calcium hydroxide cartridge of the present invention is A first permeable container containing calcium hydroxide having a first particle size, A second permeable container containing calcium hydroxide having a second particle size larger than the first particle size, With the first permeable container and the second permeable container placed inside, a cylindrical container is used to discharge wastewater that has been introduced through the upper opening and discharged through the lower opening. It is characterized by having the following features.

[0008] According to this invention, by treating wastewater using calcium hydroxide of different particle sizes, it is possible to maintain water flow while stably keeping the pH of the wastewater strongly alkaline.

[0009] In the above invention, The cylindrical container contains multiple of the first permeable container and multiple of the second permeable container. The first permeable container and the second permeable container are characterized by being arranged alternately in the vertical and horizontal directions.

[0010] According to the present invention, by arranging the first permeable container and the second permeable container alternately, the pH of the wastewater can be stably maintained at a strongly alkaline level while maintaining water flow.

[0011] The above invention is characterized by comprising a permeable cassette container that houses the first permeable container and the second permeable container, which are arranged on the same horizontal plane within the cylindrical container.

[0012] According to the present invention, since the first water-permeable container and the second water-permeable container, which are arranged on the same horizontal plane, are housed in a water-permeable cassette container, the first water-permeable container and the second water-permeable container can be easily arranged in a cylindrical container by placing the water-permeable cassette container inside the cylindrical container, without having to individually arrange the first water-permeable container and the second water-permeable container inside the cylindrical container.

[0013] In the above invention, the permeable cassette containers are characterized in that a plurality of them are arranged vertically, spaced apart by a predetermined distance from each other.

[0014] According to the present invention, by forming a space between permeable cassette containers, wastewater can be retained in this space, thereby increasing the contact time between the wastewater and calcium hydroxide, and thus stabilizing the pH.

[0015] In the above invention, A third permeable container containing calcium hydroxide having the first particle size is positioned above the location where the first and second permeable containers are arranged within the cylindrical container.

[0016] According to the present invention, by placing a third permeable container containing calcium hydroxide having a first particle size with a small particle size above it, the pH of the wastewater can be maintained at a strongly alkaline level.

[0017] In the above invention, A fourth permeable container containing calcium hydroxide having the second particle size is positioned below the location where the first and second permeable containers are arranged within the cylindrical container.

[0018] According to the present invention, by arranging a fourth permeable container containing calcium hydroxide having a second particle size with a larger particle size at the bottom, stagnation of the water flow can be prevented.

[0019] In the above invention, A plurality of through holes are provided on the lower side surface of the cylindrical container.

[0020] According to the present invention, the retention of water flow can be prevented.

[0021] Further, the wastewater treatment apparatus of the present invention includes a box-shaped container for accommodating a calcium hydroxide cartridge, and an outer container for accommodating the box-shaped container and discharging the wastewater overflowing from the box-shaped container from the lower opening. The position of the upper end of the box-shaped container is arranged to be lower than the position of the upper end of the calcium hydroxide cartridge.

[0022] According to the present invention, by supplying wastewater from the upper opening of the calcium hydroxide cartridge, the wastewater flows into the box-shaped container from the lower opening of the calcium hydroxide cartridge, overflows from the upper end of the box-shaped container into the outer container, and is discharged to the outside from the lower opening of the outer container. As a result, the position lower than the upper end of the box-shaped container in the calcium hydroxide cartridge can be filled with wastewater, and by arranging the water-permeable container in the calcium hydroxide cartridge at a position lower than the upper end of the box-shaped container, the solidification of calcium hydroxide in the water-permeable container can be prevented.

Brief Description of the Drawings

[0023] [Figure 1] It is a transparent front view of the wastewater treatment apparatus according to an embodiment of the present invention. [Figure 2] It is a transparent perspective view of the calcium hydroxide cartridge showing the arrangement of the water-permeable cassette container and the water-permeable container in the calcium hydroxide cartridge according to the same embodiment. [Figure 3] It is a transparent plan view of the water-permeable cassette container showing the arrangement of the water-permeable container in the water-permeable cassette container of the calcium hydroxide cartridge according to the same embodiment.

Embodiments for Carrying Out the Invention

[0024] Embodiments of the present invention will be described in detail below with reference to the drawings.

[0025] Figure 1 is a see-through front view of a wastewater treatment device 1 according to an embodiment of the present invention. This wastewater treatment device 1 is installed in grease traps, wastewater storage tanks, etc., to maintain a constant pH of wastewater discharged from restaurants, food processing plants, accommodation facilities, etc.

[0026] As shown in Figure 1, the wastewater treatment device 1 comprises a calcium hydroxide cartridge 10 containing calcium hydroxide powder, a box-shaped container 20 that houses the calcium hydroxide cartridge 10, and an outer container 30 that houses the box-shaped container 20, forming a triple-layered container.

[0027] The calcium hydroxide cartridge 10 has an upper opening 101 for wastewater to flow in and a lower opening 102 for the wastewater that has flowed in to the outside. The box-shaped container 20 is a container with an opening 201 at the top and detachably houses the calcium hydroxide cartridge 10. The outer container 30 allows wastewater overflowing from the box-shaped container 20 to flow in and discharges it through the lower opening 302.

[0028] Here, the upper end 202 of the box-shaped container 20 is positioned lower than the upper end 103 of the calcium hydroxide cartridge 10, so that wastewater overflowing from the box-shaped container 20 flows smoothly into the outer container 30.

[0029] Figure 2 is a transmissive perspective view of the calcium hydroxide cartridge 10, showing the arrangement of the permeable cassette container 12 and permeable containers 13 and 14 within the calcium hydroxide cartridge 10 according to this embodiment.

[0030] The calcium hydroxide cartridge 10 has openings 101 and 102 at its top and bottom, respectively, and contains a cylindrical container 11 for housing a water-permeable cassette container 12. Inside the cylindrical container 11, two cylindrical water-permeable cassette containers 12 are arranged so that the bottom surface of one water-permeable cassette container 12 faces the top surface of the other water-permeable cassette container 12. In this embodiment, the diameter of the cylindrical container 11 is approximately 8 to 10 cm, and the height is approximately 20 to 30 cm. The water-permeable cassette container 12 is a container that allows water to pass through, and in this embodiment, it is made of metal with a mesh-like through-hole.

[0031] Inside the permeable cassette container 12, there are two first permeable containers 13 containing particulate calcium hydroxide (corresponding to the "first particle size" in the claim), and two second permeable containers 14 containing granular calcium hydroxide (corresponding to the "second particle size" in the claim) having a larger particle size than the first permeable containers. In this embodiment, the first permeable containers 13 and the second permeable containers 14 have a cylindrical shape. Furthermore, the first permeable containers 13 and the second permeable containers 14 are containers that allow water to pass through, similar to the permeable cassette container 12, and are made of metal with mesh-like through holes.

[0032] In this embodiment, when the wastewater flow rate is 13-25 sec / L, the particle size of the fine particulate calcium hydroxide is approximately 10.3 μm, and the particle size of the granular calcium hydroxide is 2-3 mm. However, this is merely an example; the particle size of the fine particulate calcium hydroxide should be such that it can sufficiently contact the wastewater and stably maintain the wastewater's pH at a strongly alkaline level of 11.8-12.24. The particle size of the granular calcium hydroxide should be such that it does not obstruct the water flow.

[0033] Figure 3 is a transparent plan view of the permeable cassette container 12, showing the arrangement of the first permeable container 13 and the second permeable container 14 within the permeable cassette container 12. Figure 3(a) is a transparent plan view of the lower permeable cassette container 12, and Figure 3(b) is a transparent plan view of the upper permeable cassette container 12. As shown in these figures, the first permeable container 13 and the second permeable container 14 are arranged alternately on the bottom surface (same horizontal plane) inside the permeable cassette container 12. That is, on the bottom surface of the permeable cassette container 12, the first permeable container 13 and the second permeable container 14 are arranged adjacent to each other, but the first permeable containers 13 and the second permeable containers 14 are not arranged adjacent to each other.

[0034] The two permeable cassette containers 12, one upper and one lower, are arranged so that the first permeable container 13 and the second permeable container 14 housed inside each are facing each other. In other words, in the vertical direction as well, the first permeable container 13 and the second permeable container 14 are arranged alternately.

[0035] In this way, by arranging the first water-permeable container 13 and the second water-permeable container 14 alternately in the vertical and horizontal directions, stagnation of water flow can be prevented, and the pH can be stably maintained at a strongly alkaline level. Furthermore, by housing the first water-permeable container 13 and the second water-permeable container 14 in a water-permeable cassette container 12, the first water-permeable container 13 and the second water-permeable container 14 can be easily installed in the cylindrical container 10 by installing the water-permeable cassette container 12 inside the cylindrical container 10, without having to directly install the first water-permeable container 13 and the second water-permeable container 14 inside the cylindrical container 10.

[0036] The two permeable cassette containers 12 are arranged inside the cylindrical container 11 so as to be separated by a predetermined distance (1 cm in this embodiment) in the vertical direction. By creating a space between the permeable cassette containers 12 in this way, wastewater can be retained in this space, increasing the contact time between the calcium hydroxide in the permeable cassette containers 12 and the wastewater, thereby stabilizing the pH. Here, the pH of a saturated calcium hydroxide solution is 12.5, but the pH of the wastewater can be adjusted from 11.8 to 12.24 depending on the flow rate.

[0037] Above the positions where the first permeable container 13 and the second permeable container 14 are located within the cylindrical container 11, a third permeable container 15 containing particulate calcium hydroxide is positioned. Furthermore, below the positions where the first permeable container 13 and the second permeable container 14 are located within the cylindrical container 11, a fourth permeable container 16 containing granular calcium hydroxide is positioned. Here, the external shapes of the third water-permeable container 15 and the fourth water-permeable container 16 are configured to be cylindrical, similar to the external shape of the water-permeable cassette container 12.

[0038] In this way, by placing a third permeable container 15 containing fine particles of calcium hydroxide above it, the pH of the wastewater can be maintained at a strongly alkaline level. Furthermore, by placing a fourth permeable container 16 containing granular calcium hydroxide at the bottom, wastewater can be allowed to pass through the fourth permeable container 16 without obstruction, preventing water flow from stagnating.

[0039] Multiple through-holes 17 are provided on the lower side surface of the cylindrical container 11. In this embodiment, the diameter of the through-holes 17 is set to 5 to 10 mm. This prevents water stagnation, as wastewater can be discharged to the outside through the through-holes 17 even if the flow of wastewater passing through the fourth permeable container 16 becomes stagnant.

[0040] The calcium hydroxide cartridge 10 configured as described above is installed and used inside the box-shaped container 20 of the wastewater treatment device 1. The calcium hydroxide cartridge 10 is detachable from the box-shaped container 20, and if the treatment capacity of the calcium hydroxide cartridge 10 decreases as a result of continued use of the wastewater treatment device 1, the calcium hydroxide cartridge 10 can be replaced with a new one. The removed calcium hydroxide cartridge 10 can be reused, for example, as a soil conditioner or a disinfectant in a poultry farm.

[0041] In the wastewater treatment device 1 with the above configuration, when wastewater is supplied to the opening 101 at the top of the calcium hydroxide cartridge 10, the wastewater passes through the third permeable container 15, the permeable cassette container 12, and the fourth permeable container 16, making the liquid properties of the wastewater strongly alkaline. The wastewater is discharged from the opening 102 at the bottom of the calcium hydroxide cartridge 10 towards the box-shaped container 20. When wastewater accumulates in the box-shaped container 20 and the water level rises, the wastewater overflows from the upper end 202 of the box-shaped container 20 towards the outer container 30. This wastewater is discharged to the outside from the opening 302 at the bottom of the outer container 30. In this case, the area within the calcium hydroxide cartridge 10 that is lower than the upper end 202 of the box-shaped container 20 can always be kept submerged. Therefore, by positioning the permeable cassette container 12 at a position lower than the upper end 202 of the box-shaped container 20 within the calcium hydroxide cartridge 10, the permeable cassette container 12 can always be kept submerged, preventing the calcium hydroxide in the first permeable container 13 housed in the permeable cassette container 12 from solidifying and reducing its processing capacity.

[0042] By passing wastewater discharged from food processing and other processes through the wastewater treatment device 1 before discharging it into the sewer system, the wastewater can be made strongly alkaline, which makes it easier to decompose oil and prevents unpleasant odors.

[0043] As described above, the calcium hydroxide cartridge 10 comprises a first permeable container 13 containing fine particles of calcium hydroxide, a second permeable container 14 containing granular calcium hydroxide, and a cylindrical container 11 that houses the first and second permeable containers 13 and 14 inside, and discharges wastewater that flows in through the upper opening 101 through the lower opening 102. In this way, by passing the wastewater through the cylindrical container 11 containing the first and second permeable containers 13 and 14 containing calcium hydroxide of different particle sizes, it is possible to prevent stagnation of the wastewater flow and to maintain the pH of the wastewater at a strongly alkaline level in a stable manner, thereby enhancing the deodorizing effect.

[0044] Furthermore, the wastewater treatment device 1 comprises a box-shaped container 20 that houses the calcium hydroxide cartridge 10 and an outer container 30 that houses the box-shaped container 20. The upper end 202 of the box-shaped container 20 is positioned lower than the upper end 103 of the calcium hydroxide cartridge 10. This allows wastewater overflowing from the box-shaped container 20 to flow towards the outer container 30, preventing backflow and enabling smooth discharge of strongly alkaline wastewater containing calcium hydroxide to the outside.

[0045] The embodiments of the present invention described above are merely examples and can be modified as appropriate without departing from the spirit of the claimed invention.

[0046] For example, in the embodiment described above, two permeable cassette containers 12 were provided inside the cylindrical container 11, but the number of permeable cassette containers 12 provided is not limited to two, and three or more may be provided depending on the size of the cylindrical container 11. Furthermore, the permeable cassette container 12 is not limited to metal; for example, it may be made of plastic.

[0047] Furthermore, although this embodiment describes arranging two first permeable containers 13 and two second permeable containers 14 within the permeable cassette container 12, it is not limited to this, and depending on the size of the permeable cassette container 12, five or more first permeable containers 13 and second permeable containers 14 may be provided within the permeable cassette container 12.

[0048] Furthermore, the shapes and sizes of the cylindrical container 11, permeable cassette container 12, first permeable container 13, second permeable container 14, box-shaped container 20, outer container 30, etc. in the above-described embodiment are merely examples, and for example, these shapes may be rectangular parallelepipeds. Also, the cylindrical container 11 and outer container 30 may be perfectly cylindrical in shape.

[0049] Furthermore, when installing the permeable cassette containers 12, an object made of a material such as a sponge that does not obstruct water flow may be inserted between the permeable cassette containers 12 for the purpose of maintaining the space between the permeable cassette containers 12 and ensuring structural stability. The object made of a material such as a sponge may be placed in the entire space between the permeable cassette containers 12, or it may be placed in a part of the space between the permeable cassette containers 12 (for example, in a donut shape along the side). [Explanation of Symbols]

[0050] 1. Wastewater treatment equipment 10 Calcium Hydroxide Cartridges 11. Cylindrical container 12 Permeable cassette containers 13. First permeable vessel 14. Second permeable vessel 15. Third permeable vessel 16. Fourth permeable vessel 101 Upper opening 102 Lower opening 103 Top 20 Box-shaped container 201 Opening 202 Upper end 30 Outer container 302 Lower opening

Claims

1. A first permeable container containing calcium hydroxide having a first particle size, A second permeable container containing calcium hydroxide having a second particle size larger than the first particle size, With the first permeable container and the second permeable container placed inside, a cylindrical container is used to discharge wastewater that has been introduced through the upper opening and discharged through the lower opening. A calcium hydroxide cartridge characterized by having the following features.

2. The cylindrical container contains multiple of the first permeable container and multiple of the second permeable container. The calcium hydroxide cartridge according to claim 1, characterized in that the first permeable container and the second permeable container are arranged alternately in the vertical and horizontal directions.

3. The calcium hydroxide cartridge according to claim 2, further comprising a permeable cassette container that houses the first permeable container and the second permeable container, which are arranged on the same horizontal plane within the cylindrical container.

4. The calcium hydroxide cartridge according to claim 3, characterized in that a plurality of the permeable cassette containers are arranged vertically with a predetermined distance between adjacent ones.

5. The calcium hydroxide cartridge according to claim 1, characterized in that a third permeable container containing calcium hydroxide having the first particle size is positioned above the position where the first permeable container and the second permeable container are arranged within the cylindrical container.

6. The calcium hydroxide cartridge according to claim 1, characterized in that a fourth permeable container containing calcium hydroxide having the second particle size is positioned below the position where the first permeable container and the second permeable container are arranged within the cylindrical container.

7. The calcium hydroxide cartridge according to claim 1, characterized in that a plurality of through holes are provided on the lower side surface of the cylindrical container.

8. A box-shaped container for housing the calcium hydroxide cartridge described in claim 1, The system comprises an outer container that houses the aforementioned box-shaped container and discharges wastewater overflowing from the box-shaped container through an opening at the bottom, A wastewater treatment device characterized in that the upper end of the box-shaped container is positioned lower than the upper end of the calcium hydroxide cartridge.

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