JP2022050994A - Oil removal method - Google Patents

Abstract

To provide an oil removal method capable of easily installing an adsorbent and capable of performing adsorption of oil and fat by surely adsorbing oil and fat.SOLUTION: In an oil removal method, when the sheet-like three adsorbent materials 2 (the first adsorbent material 21 to the third adsorbent material 23) which adsorb the floating oil and fat components floating in the second tank 12, the grease separation tank of grease trap 1, two adsorbent 2 (first adsorbent 21, second adsorbent 22) are floated along the direction of drainage flow. Next, the third adsorbent 2 (third adsorbent 23) is placed on top of each of the two adsorbent 2.SELECTED DRAWING: Figure 3

Description

The present invention relates to an oil removing method for removing oil accumulated in a grease trap.

Commercial kitchens are obliged to install grease traps that separate oils and fats contained in wastewater. The oil and fat accumulated in the grease trap gives off a foul odor and becomes sticky, so regular cleaning is required. However, regular cleaning is a heavy burden on the store. Regarding such grease trap oil removal, those described in Patent Documents 1 and 2 are known.

In the method for removing fat in wastewater described in Patent Document 1, in a wastewater treatment tank such as a grease trap, an oil adsorbent is attached to the wall surface or the upper part of the oil / water separation chamber, and the oil / water separation chamber or its upstream side is attached. It is to supply a saponin-containing agent to the water.
In this oil adsorbent, 12 sheets of oil-absorbing paper are stacked and inserted and supported in a net basket.

Further, the oil adsorbent described in Patent Document 2 is a connecting member in which an oil adsorbent made by storing crushed or crushed waste paper of printed matter in an oil-permeable bag body connects a plurality of floats and the floats to each other. It is placed on a float consisting of.

Japanese Unexamined Patent Publication No. 6-277657 Japanese Patent Application Laid-Open No. 2003-164867

However, in the method for removing fat in wastewater described in Patent Document 1, since an oil adsorbent in which a sheet-shaped oil-absorbing paper is stacked in a net basket is used, the net basket may hinder the adsorption of oil. There is. Further, in the oil adsorbent described in Patent Document 2, the oil adsorbent is placed on the float, and there is a possibility that the oil does not easily permeate into the oil adsorbent above the float.
In addition, cleaning the net basket and float is complicated.

Further, if there is no net cage or float, the adsorbent may be washed away by the drainage water stream, the initial posture cannot be maintained, and the oil adsorption performance may not be exhibited.

Therefore, an object of the present invention is to provide an oil removing method capable of exhibiting the adsorption performance of oils and fats by being able to easily install an adsorbent and reliably adsorbing oils and fats.

In the oil removing method of the present invention, when a plurality of adsorbents formed in a sheet shape for adsorbing oils and fats floating in a grease trap oil and fat separation tank are floated and arranged along the flow direction of drainage, they are one of each other. It is characterized in that the portions are arranged so as to overlap each other.

According to the oil removing method of the present invention, when a plurality of adsorbents are floated on the oil / fat separation tank along the flow direction of the drainage, even if the drainage has momentum, some of the adsorbents overlap each other. Just by floating the adsorbent, it is possible to prevent the adsorbent from bending due to the momentum of drainage.

It is possible to arrange two of the adsorbents side by side while stacking a part of the adsorbents, and arrange the third adsorbent on top of the two adsorbents. By arranging two sheets side by side while stacking a part of the adsorbent, and then arranging the third sheet on top of the two sheets, the third sheet holds down the two adsorbents, so two more adsorbents are placed. Can be prevented from flowing.

It is possible that the total width of the plurality of adsorbents is equal to or greater than the depth width in the direction orthogonal to the flow direction of the drainage of the oil / fat separation tank.
By using such an adsorbent, even if a part of the plurality of adsorbents is arranged in an overlapping manner, it can be arranged so as to cover the entire drainage of the oil / fat separation tank.

It can be assumed that the length of the adsorbent in the flow direction of the drainage of the oil / fat separation tank is formed in accordance with the length of the oil / fat separation tank.
If the length of the adsorbent in the flow direction of the drainage of the oil / fat separation tank is formed according to the length of the oil / fat separation tank, the adsorbent is supported by the partition wall on the downstream side even if the drainage has momentum. Therefore, the adsorbent can firmly maintain its original posture.

When a purifying agent that decomposes fats and oils is placed in the fats and oils separating tank, the granular purifying agent is put into a bag-shaped net with a hook, and the hook is separated from the fats and oils separating tank and the adjacent tank. It can be hooked on the partition wall.
Since the purifying agent is contained in the net, the frequency of outflow from the oil / fat separation tank can be suppressed and retained. In addition, by putting the purifying agent in the net and consolidating it, it is possible to prevent it from being scattered at the bottom of the oil / fat separation tank and prevent it from being mistaken for filth.

According to the oil removing method of the present invention, it is possible to prevent the adsorbent from bending due to the momentum of drainage just by floating the adsorbent, so that the adsorbent can be easily installed and surely. By being able to adsorb oils and fats, it is possible to exhibit the adsorption performance of oils and fats.

It is a figure for demonstrating the grease trap which uses the oil removal method which concerns on embodiment of this invention. (A) is a diagram for explaining the adsorbent used in the oil removing method according to the present embodiment, and (B) is a grease trap for the purifying agent used in the oil removing method according to the present embodiment. It is a figure which shows the state when it arranges in. It is a figure for demonstrating the oil removal method which concerns on this embodiment, (A) is a figure for demonstrating installation of a purifying agent, (B) is a figure for demonstrating installation of an adsorbent. FIG. 3C is a diagram showing a state in which the adsorbent has adsorbed oils and fats.

The oil removing method according to the embodiment of the present invention will be described with reference to the drawings.
The oil removing method according to the present embodiment is provided in a commercial kitchen and removes oil and fat from a grease trap (interfering device) that separates and discharges oil from wastewater.

For example, the grease trap 1 shown in FIG. 1 is formed from three water tanks, that is, a first tank 11 to a third tank 13.
In the first tank 11, a basket B that receives food waste such as leftover food and vegetable waste and collects the food waste is arranged, and the basket B collects the food waste and settles sludge to drain the waste. It is a solid matter separation tank that separates solid matter from.
The second tank 12 is a tank adjacent to the downstream side of the first tank 11, and is a fat and oil separation tank that blocks the fat and oil floating in the drainage from the first tank 11.
The third tank 13 is a tank adjacent to the downstream side of the second tank 12. The drainage collected in the third tank 13 is drained to the sewage by the trap pipe T that takes in water from the middle layer.

An adsorbent and a purifying agent are used to remove the oil and fat.
The adsorbent 2 shown in FIG. 2 (A) is formed in the form of an elongated sheet, and is formed of an ultra-fine fiber body called a nanofiber, which is thinner than a fiber body called a microfiber.
As the adsorbent 2, for example, Magic Fiber (registered trademark) manufactured by M-Tex can be used. The magic fiber is formed of a fiber body made of polypropylene having a diameter of 100 nm to 20 μm, and has a ability to adsorb oils and fats 50 times its own weight.
Further, the adsorbent 2 can also adsorb a surfactant used for detergents and the like, scum and the like.

The purifying agent 3 shown in FIG. 2B contains enzymes, charcoal, iron, magnesium, etc., and activates microorganisms by eluting negative ions and chelated iron ions, and these microorganisms. By decomposing sludge and oil, it purifies and improves water quality and reduces odor.

A method for removing oil from the grease trap 1 using such an adsorbent 2 and a purifying agent 3 will be described.
First, the purifying agent 3 shown in FIG. 2B is placed in the second tank 12 of the grease trap 1 shown in FIG. The purifying agent 3 is contained in a bag-shaped net 31 in which the hook 33 is connected by a string 32. The hook 33 of the purifying agent 3 is hooked on the partition wall 14. At this time, as shown in FIG. 3A, the wastewater is hooked on the partition wall 14 between the first tank 11 and the second tank 12 on the upstream side in the flow direction F of the drainage.

Next, as shown in FIG. 3B, the three adsorbents 2 are arranged in the second tank 12 which is the oil / fat separation tank. At this time, the two adsorbents 2 are floated along the drainage flow direction F. Next, the third adsorbent 2 is superposed on the two adsorbents 2, respectively.

In each tank of the grease trap 1 (first tank 11 to third tank 13), the depth width W1 in the direction orthogonal to the drainage flow direction F varies in size depending on the scale of the commercial kitchen in which the grease trap is installed. For example, in the small size, the depth width W1 is 60 cm, and in the large size, the depth width W1 is 90 cm.

In the adsorbent 2, the total width W2 of the two adsorbents 2 is equal to or less than the depth width W1 of the second tank 12, and the total width W2 of the three adsorbents 2 is the total width W2 of the second tank 12. It is formed so as to have a depth width W1 or more.
In the grease trap 1 in the present embodiment, the depth width W1 of the second tank 12 is 60 cm. Therefore, the width W2 of each of the three adsorbents is formed wider than 30 cm. For example, the width W2 of the adsorbent can be mostly about 32 cm and can be 33 cm.
Further, since the length L1 of the drainage flow direction F in the second tank 12 is 60 cm, the length L2 of the adsorbent 2 is also set to 60 cm.

When arranging the adsorbent 2 in the second tank 12, first, two adsorbents 2 (first adsorbent 21, second adsorbent 22) are arranged in the depth width W1 direction of the second tank 12.
Since the depth width W1 of the second tank 12 is 60 cm and the width W2 of one adsorbent 2 is wider than 30 cm, a part of the adsorbent 2 overlaps in the depth width W1 direction of the second tank 12. For example, the side portion of the first adsorbent 21 along the drainage flow direction F1 is placed on the second adsorbent 22.

Further, in the length L1 direction of the second tank 12, the length L1 is 60 cm and the length L2 of the adsorbent 2 is also 60 cm, so that the adsorbent 2 is the first tank 11 and the second tank 12. It is arranged without a gap from the partition wall 14 between the two tanks to the partition wall 15 between the second tank 12 and the third tank 13.

Then, it is arranged at a position between the two adsorbents 2 (first adsorbent 21, second adsorbent 22) arranged side by side in accordance with the central position of the third adsorbent 2.
Since the two adsorbents 2 are arranged without a gap, the third adsorbent 2 is arranged on the two adsorbents 2.

When the grease trap 1 is used in such a state, the purifying agent 3 (see FIG. 2B) first activates microorganisms by eluting negative ions and chelated iron ions. Then, the microorganism decomposes sludge and oil, purifying and improving water quality and reducing odor. Further, the purifying agent 3 in the present embodiment can decompose emulsified oil that cannot be decomposed by microorganisms.
Therefore, clogging of the trap pipe T (drainage pipe) shown in FIG. 1 can be suppressed, and the labor of cleaning can be reduced.

Further, since the purifying agent 3 shown in FIG. 2C is contained in the net 31, the frequency of outflow from the second tank 12 can be suppressed and the purifying agent 3 can be retained in the second tank 12.
The same effect can be obtained by spraying the purifying agent 3 on the second tank 12 without putting it in the net 31, but the granular purifying agent settled in the second tank 12 during regular cleaning. There is a risk that 3 will be mistaken for filth and discarded.
Therefore, by putting the purifying agent 3 in the net 31 and consolidating it, it is possible to suppress the scattering to the bottom of the second tank 12 and prevent it from being mistaken for filth.

The adsorbent 2 arranged in the second tank 12 adsorbs oils and fats floating in the wastewater flowing from the first tank 11 to the second tank 12. At this time, even if the drainage has momentum, the side portions of the first adsorbent 21 and the second adsorbent 22 arranged in the depth width W1 direction of the second tank 12 overlap each other by several cm along the drainage flow direction F1. Since the first adsorbent 21 and the second adsorbent 22 are connected to each other, it is possible to prevent the entire adsorbent 2 from being bent due to the momentum of drainage.

Further, since the third adsorbent 23 overlaps with the first adsorbent 21 and the second adsorbent 22 arranged side by side and presses them from above, further, the first adsorbent 21 and the second adsorbent 23 are further pressed. It is possible to prevent the adsorbent 2 from bending due to the force of the drainage being lost to the material 22.

As described above, according to the oil removing method according to the present embodiment, since the two adsorbents 2 are only arranged so as to be overlapped with each other, the adsorbents 2 are simply floated and arranged side by side without using any special equipment. Therefore, the posture from the installed state can be maintained by the momentum of drainage.
Therefore, the adsorbent 2 can be easily installed, and the fat and oil can be reliably adsorbed, so that the adsorbing performance of the fat and oil can be exhibited.

Further, since the total width W2 of the two adsorbents 2 is equal to or larger than the depth width W1 of the second tank 12, even if a part of the first adsorbent 21 and the second adsorbent 22 are arranged in an overlapping manner, the first adsorbent 21 and a part of the second adsorbent 22 may be arranged in an overlapping manner. It can be arranged so as to cover the entire drainage of the second tank 12.

Further, when the time elapses and the first adsorbent 21 and the second adsorbent 22 become heavier due to the adsorption of oils and fats, they sink from the wastewater surface. Therefore, when the third adsorbent 23 comes into contact with the wastewater surface, the oil and fat can be sufficiently adsorbed on the third adsorbent 23 as well.

Since the length L2 of the adsorbent 2 in the flow direction of the drainage of the second tank 12 is formed in accordance with the length L1 of the second tank 12, the adsorbent 2 is on the downstream side even if the drainage has momentum. Since it is supported by the partition wall 15, the adsorbent 2 can firmly maintain its original posture.

As shown in FIG. 3C, after one week has passed in this way, the adsorbent 2 (first adsorbent 21 to third adsorbent 23) having sufficiently adsorbed oils and fats is collected and discarded. ..
By installing the adsorbent 2 in this way, it is possible to prevent oil and fat from adhering to and accumulating on the peripheral wall of the second tank 12 and complicating the labor of cleaning.

In the present embodiment, the depth width W1 of the second tank 12 shown in FIG. 1 is 60 cm, but in the case of a large-scale kitchen, a large grease trap 1 is installed and the depth width W1 becomes 90 cm. ..

In this case, as shown in FIG. 3B, when the third adsorbent 2 is arranged in the depth width W1 direction, the width W2 of the adsorbent 2 is wider than 30 cm, so that the three adsorbents 2 are formed. The total exceeds 90 cm. Therefore, when the three adsorbents 2 are arranged in the depth width W1 direction, the side portions along the drainage flow direction F1 overlap.
Therefore, since the first adsorbent 21 and the third adsorbent 23 are connected to each other, it is possible to prevent the entire adsorbent 2 from being bent due to the momentum of drainage.

Further, since the total width W2 of the three adsorbents 2 is equal to or larger than the depth width W1 of the second tank 12, even if a part of the first adsorbent 21 to the third adsorbent 23 is arranged in an overlapping manner, it may be arranged. It can be arranged so as to cover the entire drainage of the second tank 12.

In the present embodiment, the cases where the depth width W1 of the grease trap 1 is 60 cm and 90 cm and the case where the adsorbent 2 is three sheets have been described, but the adsorbent 2 is used according to the depth width of the grease trap 1. It is also possible to change the width and the number of sheets.

The oil removing method of the present invention is suitable for restaurants, take-out lunch shops, and the like because it can reduce the trouble of cleaning the grease trap installed in the commercial kitchen.

1 Grease trap 11 1st tank 12 2nd tank 13 3rd tank 14,15 partition wall 2 Adsorbent 21 1st adsorbent 22 2nd adsorbent 23 3rd adsorbent 3 Purifier 31 Net 32 String 33 Hook B Basket T trap Pipe F Drainage flow direction W1 Depth width W2 Width

Claims (5)

When multiple adsorbents formed in the form of a sheet that adsorbs the oil and fat floating in the grease trap oil and fat separation tank are floated and arranged along the flow direction of the drainage, they are arranged so that some of them overlap each other. Oil removal method. The oil removing method according to claim 1, wherein two sheets of the adsorbent are arranged side by side while overlapping a part of the adsorbent, and the third adsorbent is arranged on the two adsorbents. The oil removing method according to claim 1 or 2, wherein the total width of the plurality of adsorbents is equal to or greater than the depth width in the direction orthogonal to the flow direction of the drainage of the oil / fat separation tank. The oil removing method according to any one of claims 1 to 3, wherein the length of the adsorbent in the flow direction of the drainage of the oil / fat separation tank is formed in accordance with the length of the oil / fat separation tank. When a purifying agent that decomposes oils and fats is placed in the oil and fat separation tank, the granular purifying agent is put into a bag-shaped net with a hook, and the hook is separated from the oil and fat separation tank and an adjacent tank. The oil removing method according to any one of claims 1 to 4, which is hooked on a partition wall.

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