JP2010284578A - Filter for wastewater - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a filter for wastewater capable of separating food residue and also surely separating oil with a simple configuration to obtain cleaned wastewater, and also performing a treatment by a simple operation of only injecting mixed water containing the food residue and the to eliminate needs of labor and time for the treatment. <P>SOLUTION: In the filter, a filtering part 2 for the food residue is set at an upper part of a bottomed cylindrical water-tight support member 1; an oil/water separation part 3 is set thereunder having an oil/water separation filter 31 with pore diameters of 10-700 μm allowing flow-down of water and consisting of hydrophilic synthetic resin sponge of continuous pores with a water retention of 100-1,400%; and a drain passage 4 is provided under the oil/water separation part 3 in the support member 1, with an inlet 41 communicatedly connected to the separation part 3 and with an uppermost position of an outlet 42 disposed to be located between the separation part 3 and filtering part 2 for the food residue. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a drainage filter used for draining water that has been purified by removing food waste and oil contained in the drainage of a household or a restaurant, for example.

  Oil and lard have been mixed in wastewater from ordinary households and commercial kitchens, and such wastewater not only causes clogging and odors in sewer pipes, but also has a significant function in public sewerage facilities. There is also a problem that oil blocks (white solids) from sewer facilities flow out to the harbor after heavy rain, etc., and in the area, oils and fats in the mixed liquid are separated for restaurant operators Measures are taken to prevent oil and lard from flowing into the sewer by installing a blocking device (grease trap).

  However, the above-mentioned interceptor (grease trap) is expensive and requires maintenance and management such as collecting collected oil and using biodegradation, so it is burdensome to install in a general household. However, if the amount of oil used is large, the amount of oil stored in the interceptor (grease trap) becomes large, and there is a problem that a large size is required and labor and cost required for maintenance are required.

  Therefore, for example, a drainer for food waste such as so-called triangular corners having an oil separation function in JP-A-6-154107, JP-A-7-21180, JP-A-2007-322014, etc. A drainage filter installed at a drain outlet of a sink is known.

  These food collectors equipped with an oil separation function have an advantage that they can be provided at low cost as well as easy to maintain and install because of their simple structure.

  However, the oil separation means provided in the conventional simple drainage filter is to adsorb oil to a filter such as a nonwoven fabric made of polypropylene or the like as a raw material. For this reason, when oil is adsorbed on the filter, the filtration performance is lowered and the flow speed is lowered, so that the processing work is troublesome, and it is necessary to frequently replace the filter, resulting in an economical burden and labor.

  Also, since the amount of oil separated is governed by the filter's adsorption capacity, it is necessary to increase the thickness and area of the filter to increase the filter's adsorption capacity, and the transmittance decreases when the thickness is increased. Thus, the processing takes time, and when the area is increased, there is a problem that not only the price increases but also a large installation place is required because the whole is enlarged.

JP-A-6-154107 Japanese Utility Model Publication No. 7-21180 JP 2007-32014 A

  The present invention can separate food waste with a simple structure and can be used as a waste water that is separated and purified with oil reliably, and can be treated with a simple operation of pouring mixed water containing food waste and oil. It does not require the labor and time required for processing, and it can be recovered in the state of oil, not in the state of adsorbing oil in particular, so it can be designed inexpensively and compactly even if there is a large amount of oil. Or, it is intended to provide a drainage filter having a long filter life regardless of the installation location.

  In order to solve the above-mentioned problems, the present invention has a pore size of 10 to 700 μm, which is provided with a food bowl filtration part at the upper part in a bottomed cylindrical watertight support member and under which water can flow. And an oil / water separation part having an oil / water separation filter made of a hydrophilic synthetic resin sponge having continuous pores with a water retention rate of 100 to 1400%, and an inlet is connected to a position below the oil / water separation part in the support member. A drainage channel is provided so that the uppermost position of the outlet is located between the oil / water separation part and the filtration part of the food basket.

  The present invention, for example, is a method of mixing water by simply pouring mixed water containing the remainder of a dish or food basket during cooking from the opening of a support member formed on the top surface to a filtration section of the food basket provided at the top. The soot is removed by the filtration part of the food soot, and the mixed water containing the oil flows down to the oil-water separation part provided below. At this time, a drainage channel having an outlet connected to the lower position of the oil / water separator in the support member and having an uppermost position disposed between the upper position of the oil / water separator and the filtration part of the food basket. Is provided in a state where a water layer or a water layer on which an oil layer is formed is stored up to the height of the outlet of the drainage channel above the oil / water separation part disposed in the support member. When the mixed water containing oil further flows down to the oil / water separator, the water that has passed through the oil / water separator is drained from the outlet of the drainage channel, and the separated oil is stored in the support member. A layer is levitated and stored in layers on it.

  Therefore, the water from which the oil has been continuously removed can be flowed out simply by pouring the mixed water containing the rest of the dish and the food basket during cooking from the opening of the support member.

  In addition, when a predetermined amount of oil content separated into a layer above the moisture layer in the support member is removed, the filter part of the food basket is removed and pumped from the upper opening or attached to a predetermined height position of the support member. It can be discharged from the drained oil passage.

  Furthermore, since a drain drainage channel having an on-off valve is provided at the bottom of the support member, soot accumulated on the bottom of the support member can be discharged.

  The oil / water separation filter provided in the oil / water separation unit contains all of the continuous pores of 10 to 700 μm filled with water and the water retention rate is as high as 100 to 1400% when the filter contains water before starting the separation work. Becomes wet with water. Therefore, when mixed water is poured into the filter in this state, water passes through the filter by gravity through continuous pores, but oil cannot pass through.

  In particular, according to the present invention, since the filter is formed of a hydrophilic synthetic resin sponge, the portions other than the pores are also hydrophilic, and as described above, the drainage channel has an inlet at a position below the oil-water separation portion in the support member. Since the outlet is located above the oil / water separator, the moisture layer is always stored above the oil / water separator located in the support member up to the outlet of the drainage channel. In this state, the surface of the filter is covered with moisture including the pores, and the filter is held in a layered state in which oil separated from the mixed water is placed on the moisture layer formed thereabove. Therefore, when the mixed water containing oil further flows down to the oil-water separator without oil adhering to the surface or clogging the pores, the water passing through the oil-water separator is discharged from the drainage channel. The oil component drained and separated from the water floats up and stores the stored water layer in a layered manner on the surface.

  Further, the continuous pores formed in the filter are preferably about 10 to 700 μm, and if it is smaller than 10 μm, the water permeation resistance is large and requires pressurization or time, and if it is 700 μm or more, it is 100 to 1400%. The water retention rate cannot be maintained.

  Further, in the present invention, when the porosity is 50 to 95%, the transmittance becomes high and separation becomes quick, and a large amount of moisture is exposed on the surface, so that the effect as a filter is improved.

  In particular, when the synthetic resin sponge of the present invention is a porous body of continuous pores made from PVA, it is easy to manufacture and has good water retention, and can be carried out without using harmful substances. In addition, it is possible to easily produce a large number of molded products as well as cloths and plates. Of course, the present invention can also be carried out using a thermoplastic resin such as polyurethane sponge as the hydrophilic synthetic resin sponge in the present invention.

  Furthermore, in the present invention, the oil / water separator has a filter support that supports the oil / water separator filter so that moisture can pass through the bottom, and the oil / water separator can be freely inserted into and removed from a predetermined position from the opening of the support member. A cylindrical body having an opening at a top surface having a predetermined height, and the filtration part of the food basket has a filtration member at least at the bottom part, and is inserted into and removed from the opening part of the oil / water separation part at a predetermined position. By making a cylindrical body with an open top surface having a height, it is very easy to attach and remove the filtration unit and the oil / water separation unit of the food basket, thereby collecting the food cake collected in the filtration unit and the collected oil content. And the oil / water separation filter can be replaced very easily.

  In particular, if an opening for the oil / water separation part and the filtration part of the food basket is provided with a handle for taking out, it is more convenient.

  According to the present invention, the food waste can be separated with a simple structure, and the waste water can be made into a waste water that has been separated and purified with certainty, and does not require labor and time required for the treatment, and particularly has a large oil content. A restaurant that can be designed inexpensively and compactly, does not depend on the installation location, has a long filter life, and can be used regardless of the home or restaurant, and discharges a large amount of oil. For example, it is possible to greatly reduce the burden of the grease trap installed, and to save labor and expenses.

Explanatory drawing which shows preferable embodiment of this invention. The longitudinal cross-sectional view in the use condition of embodiment shown in FIG. Explanatory drawing which shows the isolation | separation effect | action of embodiment shown in FIG. Explanatory drawing which shows different embodiment of this invention. Explanatory drawing which shows further another embodiment of this invention. FIG. 6 is a longitudinal sectional view of the embodiment shown in FIG. 5.

  FIG. 1 shows a preferred embodiment of a drainage filter according to the present invention. Filtration of a food basket made of a net having, for example, appropriate eyes in the upper part of a bottomed cylindrical watertight support member 1. An oil / water separation filter 31 comprising a hydrophilic synthetic resin sponge having continuous pores having a pore diameter of 10 to 700 μm and a water retention rate of 100 to 1400% provided with a portion 2 and capable of flowing water below. For example, an oil / water separator 3 including a net-like filter support 32 is provided. In particular, the oil / water separator 3 is suspended from a support (not shown) disposed on the inner periphery of the support member 1 and is replaceable.

  The food trough filtration unit 2 has a bowl-like filtration unit body 21 provided with, for example, a net-like filtration member 22 and, if necessary, for example, a mesh type used in a conventional filtration member of this type. The cover may be provided on the surface (not shown). Moreover, the food bowl filter 2 is inserted and supported from above on a support (not shown) installed on the inner wall of the support member 1, and is configured to be removable by moving it upward.

  The oil separation filter 31 is, for example, a hydrophilic synthetic resin sponge (trade name, manufactured by Aion Co., Ltd.), which is a porous body made of PVA (polyvinyl alcohol) having a pore diameter of 130 μm, a water retention rate of 1100%, and a porosity of 90%. “Bay router” product number A (F)) with a thickness of about 1 mm.

  In addition, the manufacturing method of the hydrophilic synthetic resin sponge which is a porous body which uses PVA (polyvinyl alcohol) as a raw material is well-known, for example, Unexamined-Japanese-Patent No. 7-278343, Unexamined-Japanese-Patent No. 7-165932, Unexamined-Japanese-Patent No. 2001. -81227 and the like.

  Moreover, the waste_water | drain which connected the inlet_port | entrance 41 to the bottom face 11 which is the downward position of the said oil-water separation part 3 in the support member 1, and has arrange | positioned the outlet 42 between the said oil-water separation part 3 and the said filtration part 2 of the food waste. A path 4 is provided.

  Furthermore, an oil drain passage 5 having an on-off valve 51 is provided at a predetermined position between the oil / water separator 3 of the peripheral wall 12 of the support member 1 and the food trough filter 2, and the bottom of the support member 1 is provided. A drain drainage channel 6 having an on-off valve 61 is provided in the drainage channel 4 of the wall 11.

  In the drawings, reference numeral 7 denotes a leg piece installed at the lower portion of the support member 1, and reference numeral 8 denotes a lid that covers the opening 13 formed at the top of the support member 1.

  Next, the method of use of the present embodiment will be described. First of all, to use the drainage filter according to the present invention, preferably the washing section in which the outlet 42 of the drainage channel 4 is provided with the drainage outlet of the sink. It is installed on the sink or the floor so that the opening 13 of the support member 1 is flush with the top surface of the sink. In addition, when using for the first time, it is good to give water | moisture content to the oil-water separation filter 31, and to make it swell.

  Then, as shown in FIG. 2 (a), for example, a processed product 91 such as a residue such as leftovers of ramen remaining in a bowl 9 such as a bowl or a pan or a mixed liquid such as a soup containing oil is left as it is. Alternatively, it is poured through the opening 13 of the support member 1 from which the lid 8 has been removed without adding detergent by adding water and washing away. At this time, the on-off valve 51 of the drain drainage channel 5 and the on-off valve 51 of the oil drainage channel 5 are kept closed.

  As shown in FIG. 2 (b), the processed product 91 poured from the opening 13 is left after the solid material 92 such as meat and vegetables contained in the filtration unit 2 of the food basket is separated, and remains. The mixed water of oil and moisture is poured into the oil / water separator 3 disposed below the water.

  At the beginning of use, the support member 1 is empty, and the mixed water poured into the oil / water separator 3 is poured into the oil / water separation filter 31 laid on the surface. At this time, the oil / water separation filter 31 is a porous body made of PVA (polyvinyl alcohol) as a raw material, in which continuous pores are filled with moisture provided in advance including those on the surface. For example, as shown below, the hydrophilic synthetic resin sponge is produced by a digging Marl reaction in which formaldehyde is bonded to PVA using an acid as a catalyst, and is made of a partially formalized product (PVAF) of PVA. It has a group and exhibits strong hydrophilicity.

Formula 1

  Therefore, as shown in FIG. 3, not only water 5 is supplied and held in the pores 311 of the oil / water separation filter 31, but water is adsorbed over the entire surface including the surface, and a moisture layer 51 is formed on the surface. Therefore, when mixed water is poured onto the surface, the moisture 5 binds to the moisture layer 51 covering the surface of the oil / water separation filter 31 and permeates through the pores 311, but the oil is blocked by the moisture layer 51 and remains on the moisture layer 51 as it is. And the oil component layer 52 is formed and separated. Accordingly, the water 5 that has passed through the oil / water separator 3 flows down to the bottom of the support member 1.

  Here, in this embodiment, the drainage channel 4 formed in the support member 1 connects the inlet 41 to the bottom surface 11 of the oil / water separator 3 in the support member 1 and connects the outlet 42 to the oil / water separator 3 and the food. Since it is disposed between the filter portion 2 of the soot, it does not flow out from the outlet 42 unless water accumulates up to the uppermost position of the drainage channel 4 (the Y position shown in FIG. 2B). 31 is always formed by the moisture layer 51, and the oil layer 52 separated from the mixed water formed above is formed in a state where the surface is covered with moisture including pores, so that oil adheres to the surface of the oil-water separation filter 31. When the mixed water containing oil further flows down to the oil / water separator, the water passing through the oil / water separator 3 is drained from the outlet 42 of the drainage channel 4 and separated. Is Oil content emerged moisture layer 51 the reservoir storing the oil layer 52.

  When the oil separated continuously from the outlet 42 of the drainage channel 4 is discharged and the oil content stored in the support member 1 increases and the oil layer 52 becomes thicker, the on-off valve 51 of the oil drainage channel 5 is opened. Open and collect the separated oil. At this time, since the uppermost position at the outlet 42 of the drainage channel 4 is determined, the top surface position of the oil layer 52 is constant, and the bottom surface position of the oil layer 52 sequentially approaches the surface of the oil / water separation filter 31. Before the bottom surface is brought into contact with the surface of the oil / water separation filter 31, only the oil component excluding moisture is collected. Before contacting the surface of the oil / water separation filter 31, only the oil from which water has been removed is collected. In the present embodiment, a window 14 for observing the formation state of the oil layer 52 is formed on the side surface 12 of the support member 1 (see FIG. 1), and can be confirmed. Also. The oil collecting means separated in the present embodiment is an example, and many other means such as drawing from the opening 13 of the supporting member 1 or sucking it may be used. In the present embodiment, the support member 1 is provided with the window 14 for viewing the oil layer 52, but a part or all of the support member 1 may be formed of a transparent body or the like.

  Further, when the moisture layer 51 becomes dirty due to use, particularly when a residue or the like is accumulated on the bottom of the support member 1, the drain valve 6 can be cleaned by opening the on-off valve 61.

  FIG. 4 shows a different embodiment of the present invention, and the overall configuration is the same as that of the embodiment shown in FIGS. 1 and 2, but an oil absorption filter 33 is arranged below the oil-water separation filter 31. Different points.

  In the present embodiment, the oil / water separation filter 31 is replaced or the oil content exceeding the oil / water separation filter 31 is prevented from flowing out to the moisture layer 92 due to the aging of the oil / water separation filter 31. Can do.

  FIG. 5 and FIG. 6 show different embodiments of the present invention, and the overall configuration, actions and effects are almost the same as those of the above-described embodiments, but the oil / water separator 3 supplies moisture to the bottom. A tubular body that has a filter support that can pass through and supports the oil / water separation filter 31 and that has a predetermined height that can be freely inserted into and removed from the opening 13 of the support member 1 at a predetermined position. A cylindrical body having a top surface having a predetermined height at which the filtration part of the food basket has a filtration member at least at the bottom and is freely inserted into and removed from the opening of the oil / water separation part at a predetermined position. Is different.

  According to the present embodiment, the attachment and removal of the food basket filtration unit 2 and the oil / water separation unit 3 makes it extremely easy to collect the food cake collected in the filtration unit 2, the recovery of the stored oil, and the oil / water separation filter 31. The exchange can be done very easily.

  In particular, if the handles 34 and 21 for taking out can be accommodated by rotation at the openings of the oil / water separator 3 and the filter 2 of the food bowl, it is more convenient to use.

DESCRIPTION OF SYMBOLS 1 Support member 2, Filtration part of food bowl, 3 Water separation part, 4 Drainage channel, 5 Drainage channel, 6 Drain drainage channel, 22 Handle, 31 Oil-water separation filter, 34 Handle, 41 Inlet, 42 outlet, 51 On-off valve 61 Open / close valve

Claims (9)

  The bottom of the bottomed cylindrical watertight support member is provided with a filtration portion for food basket, and has a pore size of 10 to 700 μm through which water can flow and a continuous pore with a water retention rate of 100 to 1400%. An oil / water separation part having an oil / water separation filter made of a hydrophilic synthetic resin sponge, wherein the inlet is connected to a lower position of the oil / water separation part in the support member, and the uppermost position of the outlet is the oil / water separation part and the food bowl. A drainage filter, characterized in that a drainage channel is provided so as to be positioned between the filter unit and the filter.   The drainage filter according to claim 1, wherein a drainage passage for taking out oil separated by the oil / water separation filter provided with an on-off valve is formed in the support member.   The drainage filter according to claim 1 or 2, wherein a drain drainage channel having an on-off valve is provided at the bottom of the support member.   The drainage filter according to claim 1, 2, 3, or 4, wherein an oil adsorption filter is disposed below the oil / water separation filter in the oil / water separation section.   The oil / water separator has a filter support that supports the oil / water separator filter and allows water to pass through to the bottom, and has a predetermined height that can be freely inserted into and removed from the opening of the support member at a predetermined position. A top surface having a predetermined height at which the filtration part of the food basket has a filtration member at least at the bottom part and is freely inserted into and removed from the opening part of the oil / water separation part. The drainage filter according to claim 1, wherein the drainage filter is a cylindrical body having an opening.   The drainage filter according to claim 5, wherein a handle for taking out is provided at an opening of the oil / water separator and the filter for the food bowl.   The drainage filter according to claim 1, 2, 3, 4, 5, or 6, wherein the oil-water separation filter has a porosity of 50 to 95%.   The drainage filter according to claim 1, 2, 3, 4, 5, 6 or 7, wherein the hydrophilic synthetic resin sponge is a porous body having continuous pores made of PVA.   The drainage filter according to claim 1, 2, 3, 4, 5, 6, 7 or 8, wherein the hydrophilic synthetic resin sponge is a polyurethane sponge.

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