JP2955483B2 - Grease strap device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grease strap device which decomposes and removes oils and fats discharged from a kitchen facility and eliminates offensive odor.

[0002]

2. Description of the Related Art Conventionally, wastewater containing oils and fats discharged from a kitchen facility is supplied to a grease trap tank a as shown in FIG.
Is provided with an inflow pipe b and a drain pipe c for wastewater.
Partition plate d in the grease trap tank a between the drain pipe c
And a second partition plate e are provided, and the inside of the grease trap tank a is divided into a strainer tank f, a purification tank g, and a trap tank h. The strainer tank f, the purification tank g, and the trap tank h are divided into the first partition plate d and the second partition plate e. A grease trap device k is known in which a communication is provided below a partition plate e, and a baffle plate j is provided at the bottom of a purification tank g and a trap tank h.

[0003] Wastewater containing oils and fats and solid waste is allowed to flow into the strainer tank f of the grease trap device k from the inflow pipe b, and the fixed waste is removed by the strainer m of the strainer tank f. The oils and fats are floated in the purification tank g and the trap tank h by the flow and the specific gravity difference, separated from water, scooped up on the water surface and removed.

However, when the amount of fats and oils becomes large, they solidify on the water surface to form a film, so that it is difficult to scoop up and remove the fats and oils, and the oils and fats are suspended for a certain period until the fixed fats and oils are removed. Because it is left in a state, the odor accumulates and the working environment deteriorates, and the fats and oils are not decomposed. Therefore, BOD (biochemical oxygen demand), normal hexane extract material content (animal and vegetable fats and oils content) However, there was a drawback that the reduction was not achieved.

[0005]

An object of the present invention is to provide a grease trap apparatus which eliminates solidification of oils and fats on the liquid surface, reduces the BOD value, the content of normal hexane extractable substances, and deodorizes. is there.

[0006]

SUMMARY OF THE INVENTION In view of the above-mentioned problems such as the solidification of fats and oils and the inability to reduce the content of BOD and normal hexane extractable substances based on the above prior art, an air supply device is connected inside the trap tank body. A grease trap device that provides a microporous agent to the wastewater in the inflow pipe while disposing a microbial agent in the wastewater of the inflow pipe while aerating by providing a porous diffuser pipe, and decomposing and purifying and deodorizing oils and fats to activate the microorganisms. To solve the above-mentioned drawbacks.

[0007] As a grease trap device,
The inside of the trap tank body having an inflow pipe on the upstream side and a drain pipe on the downstream side is divided into a strainer tank, a purification tank, and a trap tank in order from the upstream side by a partition plate.

In addition, adjacent tanks are communicated below, and a baffle plate is erected from the bottom of the trap tank main body between partition plates constituting the septic tank.

[0009] A porous diffuser pipe connected to the air supply device is disposed on the bottom side of the trap tank body so as to face the downstream or upstream side surface of the baffle plate in the purification tank.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a grease trap device according to the present invention. The lid 3 is detachably provided in the opening 2a of the box-shaped trap tank body 2, and the inside of the trap tank body 2 is sequentially moved from the upstream side by the three partition plates 4, 4a,. The lower end of the partition plate 4, 4a... And the bottom of the trap tank main body 2 are divided into a plurality of septic tanks 6, 6a and a trap tank 7 so that the adjacent tanks 5, 6, 6a, 7 communicate downward. The communication paths 8, 8a,... Are formed between 2b.

In addition, a baffle plate 9 is erected from the bottom 2b of the trap tank body 2 between the partition plate 4 and the partition plate 4a which constitute the septic tank 6, and the partition plate 4a which constitutes the septic tank 6a.
A baffle plate 9a is erected from the bottom 2b of the trap tank main body 2 between the partition plate 4b and the upper end of the baffle plates 9 and 9a. The baffle plates 9 and 9a are discharged from a kitchen facility (not shown) housed in the trap tank main body 2. It is lower than the level of the incoming wastewater.

Reference numeral 10 denotes an inflow pipe for flowing wastewater from the kitchen facility into the strainer tank 5. The inflow pipe 10 is disposed upstream of the trap tank main body 2, and its inflow port 10 a is located above the strainer tank 5. Side.

Reference numeral 11 denotes a drain pipe for overflowing and discharging the treated water in the trap tank main body 2. The drain pipe 11 is provided on the downstream side of the trap tank main body 2, and its inlet 11a is disposed at the inlet 11a. Submerged in the bottom 2 of the trap tank body 2
It is pointing to the b side. The overflow of the treated water overflows at a constant water level according to the height of the side wall of the trap tank main body 2 where the drain pipe 11 is attached, since the inlet 11a of the drain pipe 11 is set in the position direction. The amount of water discharged is an overflow, and the actual discharged treated water is not the upper layer of the treated water, but the treated water at the opening position of the inlet 11a of the submerged drain pipe 11 and the bottom-oriented water. It becomes treated water below the mouth 11a.

Reference numeral 12 denotes a strainer made of a net member or the like provided in the strainer tank 5. The strainer 12 is detachably mounted and removes solid waste contained in wastewater.

Numeral 13 denotes an air supply device comprising a blower. Porous air diffusers 15 and 15a connected via a pipe 14 connected to the air supply device 13 are connected to the purification tanks 6 and 6a as shown in FIGS. Is disposed on the bottom 2b side of the trap tank body 2 so as to face the upstream side surface 16 of the baffle plates 9 and 9a.

A porous air diffuser 15b similarly connected to the air supply device 13 is provided on the bottom 2b side of the trap tank 7.

It is supplied from a single air supply device 13,
Since the amount of air exhausted from each of the porous diffuser tubes 15, 15a,... Increases as it moves downstream, in order to equalize the amount of air exhausted from each of the porous diffuser tubes 15, 15a,.
Flow control valves 17, 17a... For adjusting the air flow are interposed in the pipes 14 corresponding to the respective porous diffusion tubes 15, 15a.

Further, as a second embodiment, which is another embodiment, as shown in FIGS. 3 and 4, porous air diffusers 15 and 15a connected to an air supply device 13 through a pipe 14 are provided with a septic tank 6, It is arranged on the bottom 2b side of the trap tank body 2 so as to face the downstream side surface 16a of the baffle plates 9 and 9a in 6a.

The porous air diffusers 15, 15a,... Are orthogonal to the flow direction of the waste water in the trap tank main body 2 and are disposed substantially over the short direction of the trap tank main body 2.

Next, the operation of the grease trap device according to the present invention will be described.
In a state where air is formed into fine bubbles from the porous diffuser tubes 15 and 15a and aerated, a microbial agent having a trade name of “Aures” manufactured by Matsumoto Microorganisms Laboratory Co., Ltd. An amount corresponding to the volume of the strap device 1 and the amount of fats and oils contained in the wastewater to be treated is charged, and the microbial agent flows into the strainer tank 5 together with the wastewater.

In the wastewater flowing into the strainer tank 5, solid waste is removed by the strainer 12 and sequentially flows to the downstream side, and the oils and fats in the wastewater are separated into microorganisms in the downstream purification tanks 6, 6a and the trap tank 7. Decomposes and removes odor components, BOD value (biochemical oxygen demand),
After reducing the N-hex value (normal hexane extract substance content (animal and vegetable oils and fats content)) and deodorizing and purifying, the water is drained from the drain pipe 11 to the outside.

In the above-mentioned septic tanks 6, 6a and trap tank 7, the amount of dissolved oxygen is increased by aeration by the porous diffuser tubes 15, 15a... During the ascending process, the fine particles are miniaturized by fine bubbles to increase the contact surface area, and the microorganisms thus activated are activated, whereby the action of these microorganisms decomposes fats and oils and also decomposes odor components.

In the grease trap device 1 of the first embodiment, the flow of the wastewater in the septic tanks 6 and 6a collides with the baffle plates 9 and 9a through the communication passages 8 and 8a, and the flow Is changed upward, and at the same time, the porous diffuser 15, 15
The upward separation of oils and fats in the wastewater is promoted by the application of the lifting force by the air lift effect of the air bubbles from a.

In the grease trap device 1 according to the second embodiment, the flow of the wastewater in the septic tanks 6 and 6a is controlled by the air lift effect of the bubbles from the porous diffuser tubes 15 and 15a. The flow between the partition plates 4a and between the baffle plate 9a and the partition plate 4b can be circulated and flow as shown by the arrow A, whereby the contact time of mixing and stirring with fats and oils, microorganisms, and air can be extended. .

The above-mentioned "Aures" microbial agent includes:
Generic names of "yeast" include Geotricham, Hansenula, Pichia, Saccharomycopsis, and genera of "radiobacteria"; Nocardia, Actinomyces, Streptomyces; , Pseudomonas, Aspergillus and the like as genus names of the "useful filamentous fungi", ferrous sulfate as an inorganic component, fermented animal organic matter as an organic component, humic acid, and the like.

The grease trap device 1 according to the present invention, in which the amount of fats and oils, the amount of waste water, and other conditions are the same, has the same structure as the comparative product in which the porous air diffusers 15 and 15a are eliminated and no microbial agent is administered. When an experiment was performed on one example and the second example, in the septic tank 6 of the comparative product,
BOD value is about 7200mg / liter, N-hex
The value was about 4200 mg / l, the malodor concentration was about 4.8 ppm for ammonia, about 2.3 ppm for hydrogen sulfide, and about 97 ppb for methyl mercaptan.

Next, in the case of the first embodiment of the present invention, 100 g of "Aures" microbial agent is administered per 500 g of fat per day in a kitchen facility. In the septic tank 6 of one embodiment,
The BOD value is about 450 mg / l, the N-hex value is about 1200 mg / l, the malodor concentration is about 0.2 ppm for ammonia, about 0.1 ppm for hydrogen sulfide, about 16 ppb for methyl mercaptan, and the septic tank of the first embodiment. Within 6a, the BOD value is about 88 mg / liter, N-hex
The value resulted in about 46 mg / l.

In the case of the second embodiment, the same amount of microbes as "Aures" as in the first embodiment is administered, so that the BOD value in the septic tank 6 of the second embodiment is reduced. 400mg / liter, N-hex value is about 1100m
g / liter and the concentration of offensive odor are the same as in the first embodiment. In the septic tank 6a of the second embodiment, the BOD value is about 80 mg / liter and the N-hex value is about 41 mg.
/ Liter results were obtained.

[0029]

In summary, the present invention is directed to a wastewater inflow pipe 10 into which a microbial agent has been introduced on the upstream side and a treated water drainage pipe 11 on the downstream side.
The inside of the trap tank main body 2 having the above is sequentially separated from the upstream side by the partition plates 4, 4a,.
6a, divided into trap tanks 7, adjacent tanks 5, 6, 6
a, 7 are communicated at the bottom, and baffle plates 9, 9a are erected from the bottom 2b of the trap tank body 2 between the partition plates 4, 4a ... which constitute the septic tanks 6, 6a.
Since the porous diffuser pipes 15 and 15a connected to 13 are disposed on the bottom 2b side of the trap tank main body 2 so as to face the downstream side surface 16a of the baffle plates 9 and 9a in the septic tanks 6 and 6a, Since the dissolved oxygen content is increased by aeration by the trachea 15 and 15a, the administered microorganisms are activated and the fats and oils are finely divided by fine bubbles, and the fats and oils rise by the air lift action in the septic tanks 6 and 6a. Since the separation is promoted, the decomposition of fats and oils by microorganisms is performed efficiently, the solidification of the fats and oils on the liquid surface is eliminated, and the BOD value and the content of normal hexane extractable substances can be reduced at the same time. It can be deodorized by decomposition of the components.

Further, the porous diffuser pipes 15 and 15a connected to the air supply device 13 face the upstream side surface 16 of the baffle plates 9 and 9a in the purification tanks 6 and 6a, and are disposed on the bottom 2b side of the trap tank body 2. With the arrangement, in addition to the above-described effects, the flow of wastewater in the septic tanks 6 and 6a can be circulated and fluidized, so that the contact time between fats and oils and microorganisms at the flow point can be extended, thereby further reducing fats and oils. Its practical effect is extremely large, for example, the decomposition ability can be improved.

[Brief description of the drawings]

FIG. 1 is a schematic longitudinal sectional view of a grease trap device according to the present invention.

FIG. 2 is a schematic plan view of the grease trap device.

FIG. 3 is a schematic longitudinal sectional view showing another embodiment of the grease trap device.

FIG. 4 is a schematic plan view of the grease trap device.

FIG. 5 is a schematic longitudinal sectional view of a conventional grease trap device.

[Explanation of symbols]

2 Trap tank body 2b Bottom part 4, 4a ... Partition plate 5 Strainer tank 6, 6a Purification tank 7 Trap tank 9, 9a Baffle plate 10 Inflow pipe 11 Drain pipe 11a Inlet 13 Air supply device 15, 15a Porous air diffusion pipe 16, 16a side

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) C02F 3/02 ZAB C02F 1/24 ZAB C02F 3/00 ZAB E03F 5/16

Claims (2)

(57) [Claims] An inflow pipe for wastewater charged with a microbial agent on the upstream side, and a trap tank body having a drainage pipe for treated water on the downstream side, in order from the upstream side by a partition plate inside the strainer tank,
Separate into septic tanks, trap tanks, and communicate the adjacent tanks below, and set up a baffle plate from the bottom of the trap tank body between the partition plates that constitute the septic tanks.
A grease trap device disposed on the bottom side of a trap tank body with a porous diffuser pipe connected to an air supply device facing a downstream side surface of a baffle plate in a septic tank, and submerging an inlet of a drain pipe. A grease trap device, wherein a drain pipe is attached so as to be directed to the bottom side of the trap tank main body and to keep the treated water at a constant water level. 2. A trap tank body having an inflow pipe of wastewater charged with a microbial agent on the upstream side and a drainage pipe of treated water on the downstream side, in order from the upstream side by a partition plate in the strainer tank,
Separate into septic tanks, trap tanks, and communicate the adjacent tanks below, and set up a baffle plate from the bottom of the trap tank body between the partition plates that constitute the septic tanks.
A grease trap device disposed on the bottom side of a trap tank body with a porous diffuser pipe connected to an air supply device facing an upstream side surface of a baffle plate in a septic tank, and submerging an inlet of a drain pipe. A grease trap device, wherein a drain pipe is attached so as to be directed to the bottom side of the trap tank main body and to keep the treated water at a constant water level.