JPH04134594U - grease strap - Google Patents

Abstract

(57) [Summary] [Purpose] To improve the wastewater purification processing ability of grease traps. [Structure] The grease trap 1 consists of a main body tank 2 and a lid 3 that covers the main body tank 2. The inside of the main body tank 2 has an opening 4 at the lower end.
A raw water inflow chamber 6, an oil and fat separation chamber 7, and a drainage chamber 8 with an inclined plate 21 installed on the bottom wall 2a, using two partition plates 4 and 5 having diaphragms 4 and 5a.
Separate into. The raw water inflow chamber 6 is provided with a cage-shaped filtration net 9, a microbial filter 11 and an aeration pipe 13 under the water surface, and an oil and fat separation chamber 7.
The water intake port 14a of the first pneumatic pump 14 is located on the water surface, and the water intake port 15a of the second pneumatic pump 15 is located below the water surface on the side of the aeration pipe 13 and the drainage chamber 8. The water outlets 14b and 15b of these pneumatic pumps 14 and 15 are connected to the filter net 9.
The microbial filter 11 is placed on top and repeatedly removes dirt from the raw water.
Make repeated contact.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention relates to a grease trap that separates oil and fat from wastewater.

0002

[Conventional technology]

Recently, in order to prevent water quality decline and eutrophication in rivers and lakes, not only industrial wastewater but also Even if it is general wastewater, it is necessary to purify it before discharging it into the sewer to preserve water quality. Ru. Therefore, wastewater discharged from kitchens, etc. contains oils, fats, debris, etc., which can be separated and removed. Water quality is being conserved using grease traps that are collected.

0003 The basic structure of a grease trap is that the inside of the tank body is spaced apart from the bottom wall. Separated by multiple partition plates installed in to be discharged. Biological oxidation in which aerobic microorganisms decompose and adsorb organic matter in this structure There is a grease trap that has added purifying ability that utilizes action.

0004

[Problem that the idea aims to solve]

However, in the above-mentioned grease trap, the volume of the tank body is limited, and the amount of inflow is limited. Since wastewater can only come into contact with aerobic microorganisms for a short time, it can be purified by biological oxidation. It is often discharged without sufficient treatment, resulting in poor purification performance. Therefore, the challenge of this idea was to purify grease traps using biological oxidation. The goal is to improve processing power.

[0005]

[Means to solve the problem]

In order to solve the above-mentioned problems, this idea uses a partition plate with an open bottom end inside the tank body. It is divided into a raw water inflow chamber, an oil and fat separation chamber, and a drainage chamber with a bottom facing down to the partition plate. A microbial filter is provided below the water surface of the tank body, and a cage-shaped filter is provided in the flow path of the inflow chamber. A filtration net is interposed, and an aeration pipe is placed below the water surface of the raw water inflow chamber and oil separation chamber, and The water suction port of the first pneumatic pump is placed on the water surface of the oil and fat separation chamber, and the The water intake port of the second air supply pump is arranged at We adopted a configuration in which the

[0006]

[Effect]

When the raw water flowing into the grease trap tank body passes through the filtration net, it passes through a large filter. Aerobic, where debris is filtered out and fine organic matter passes through the mesh and diffuses from the microbial filter. Separated by microorganisms or attached to the filter body itself. In addition, raw water is advected to multiple rooms. When this happens, oil, fat, and scum float to each chamber and are separated. Then, the first pneumatic pump suctions the oil and scum floating on the liquid surface, and the second pneumatic pump The feed pump sucks up the sediment that naturally falls and accumulates at the bottom of the sloping bottom of the drainage chamber, and filters it out. It is discharged upstream of the filtration screen and purified by repeated contact with the microbial filter.

[0007]

【Example】

The grease trap 1 has a main body made of FRP or stainless steel, as shown in Figure 1. The main tank 2 consists of a tank 2 and a metal grating lid 3 that covers the upper mouth of the tank 2. It is buried in the concrete floor surface, and the floor surface and the surface of the lid body 3 are flush with each other.

[0008] The main tank 2 has two partition plates 4 and 5 spaced apart from the bottom wall 2a and openings 4a and 5a. It is divided into three chambers: a raw water inflow chamber 6, an oil and fat separation chamber 7, and a drainage chamber 8. ing.

[0009] The raw water inflow chamber 6 is provided with an inlet 6a through which raw water flows, and the raw water flowing in from here is A cage-shaped filtration net 9 for filtering is provided by a cage support member provided on the tank side wall and the first partition plate 4. It is supported in a detachable manner. In addition, it is installed below the water surface of this chamber from the bottom wall 2a. A microorganism filter 11 is provided which is held by a holding member 10 having an open hole 10a, Furthermore, an aeration pipe 13 is provided which is connected to a compressor 12 outside the tank and blows out air bubbles. be. The fat and oil separation chamber 7 contains fats and oils contained in the raw water advected from the raw water inflow chamber 6. A baffle plate 22 is erected against which the beam hits and is guided upward. Also, the water surface of this room A diffuser pipe 13 is also provided at the bottom. Furthermore, it communicates with a diffuser pipe 13 that supplies air. Two pneumatic pumps 14 and 15 are provided that suck water together with bubbles. 1st pneumatic pop The water intake port 14a of the tube 14 is always located at the water surface. For that purpose, the water intake port 14 The part a is formed of a flexible tube 16 made of flexible synthetic resin, and the float 17 is installed. The water inlet 15a of the second pneumatic pump 15 is connected to the drain chamber 8 and the oil It is located at the bottom on the side of the second partition plate 5 that separates it from the separate room 7. Both pumps 14 and 15 along the water surface by a straight pipe rotatably supported via L-shaped universal joints 18, 18. The water spouts 14b and 15b are positioned above the filter net 9. Also, this A dog-shaped separation float 19 is floated on the water surface of the chamber as shown in Fig. 2. Ru. This separation float 19 is made of synthetic resin pipe material, and the amount of raw water flowing in is It moves up and down while its position is regulated by the tank wall, dividing the water surface. The drain chamber 8 is provided with a drain port 8a, and a trap pipe 20 is inserted into the drain port 8a. The treated water is discharged into the sewer. Also, at the bottom of this chamber, there is a An inclined plate 21 is installed which is inclined downward.

0010 Since the grease trap 1 according to this invention has the above-mentioned configuration, the inlet The raw water that has flowed into the filter net 9 from 6a flows out with large debris remaining, and microorganisms Organic matter is decomposed by aerobic microorganisms that diffuse from the filter body 11 or is destroyed by the filter body 11 itself. Oxygen is supplied by air bubbles that adhere and are purified and ejected from the diffuser pipe 13. It is stirred and passes through the opening 4a of the first partition plate 4 and the opening hole 10a of the filter holding member 10. Then, the oil is advected to the fat separation chamber 7. At this time, the floating nature of oils, fats, scum, etc. contained in the raw water The waste hits the baffle plate 22, is guided upward, floats, and is carried by the separation float 19. and is prevented from advecting downstream. In addition, sediments with high specific gravity contained in raw water The sediment is advected by the aeration pipe 13 from the raw water inflow chamber 6 to the oil separation chamber 7 and then to the second The inclined plate moves through the opening 5a of the partition plate 5 to the drainage chamber 8 and is installed at the bottom of this chamber. 21 so that it naturally descends and is concentrated on the lower part of the slope. Then, oil and fat and scum are removed from the float 17 and the flexible tube 1 by the first pneumatic pump 14. 6, the water is sucked through the water intake port 14a, which is always located on the water surface, and is placed on the filtering net 9. The water is discharged from the water spout 14b placed therein. Also, the water intake port 15a of the second pneumatic pump 15 is located at the bottom of the inclined plate 21, so it can suck the accumulated sediment and send it to the first air. Like the feed pump 14, water is discharged from the water spout 15b located on the filtration net 9. This way The filth in the sea urchin raw water circulates and repeatedly comes into contact with the microbial filter 11, resulting in biological oxidation. Purification treatment for use is carried out sufficiently.

[0011]

[Effect of the idea]

As explained above, this idea uses a pneumatic pump to absorb dirt contained in raw water. As the raw water is drawn and circulated and comes into repeated contact with the microbial filter, it becomes rich in biological oxidation. This has improved the wastewater purification ability added to the grease trap, helping to preserve water quality. can contribute.

[Brief explanation of drawings]

[Figure 1] Cross-sectional view of the embodiment

[Figure 2] Plan view of the same as above

[Explanation of symbols]

1 Grease trap 2 Main tank 3 Lid body 4 First bulkhead 4a First bulkhead opening 5 Second bulkhead 5a Second bulkhead opening 6 Raw water inflow chamber 7 Oil separation room 8 Drain room 9 Filtration net 11 Microbial filter 13 Air diffuser 14 First pneumatic pump 14a Water intake port of the first pneumatic pump 14b Water outlet of the first pneumatic pump 15 Second pneumatic pump 15a Water intake port of the second pneumatic pump 15b Water outlet of second pneumatic pump 21 Inclined plate

Claims (1)

[Scope of utility model registration request] Claim 1: The inside of the tank body is divided into a raw water inflow chamber, an oil and fat separation chamber, and a drainage chamber having a bottom facing the partition plate by a partition plate that is open at the lower end, and a microbial filter is provided below the water surface of the tank body. A cage-shaped filtration net is interposed in the flow path of the inflow chamber, an aeration pipe is arranged below the water surface of the raw water inflow chamber and the fat separation chamber, and a first air diffuser is disposed below the water surface of the oil separation chamber. A grease trap in which a water intake port of a pneumatic pump is arranged, a water intake port of a second pneumatic pump is arranged below a partition plate on the drainage chamber side, and water discharge ports of both pumps are arranged upstream of the filtering net.