CN103601337A - Device for removing washing agent from restaurant wastewater - Google Patents

Abstract

The invention discloses a device for removing a washing agent from restaurant wastewater. The device is composed of a water intake chamber (1), an oil separation chamber (2), a micro-nano air flotation chamber (3), a washing agent concentrated solution emulsification chamber (4), a magnetic micro-electrolysis reaction tank (5), a demulsification chamber (6) and an aerobic-precipitate mixed chamber (7). Oil substances in the restaurant wastewater containing the washing agent is separated and then subjected to air flotation by using micro-nano bubbles; substances such as the washing agent in the restaurant wastewater is concentrated to a collection pool, subjected to emulsification and magnetic micro-electrolysis, and demulsified, so as to make partial substances that can not be biodegraded in the washing agent broken into small molecules; and then aerobic treatment can be carried out directly with no need of anaerobic treatment. The device overcomes the problems of difficult degradation of substances in the washing agent, and has the advantages of goof treatment effect, stable operation, low investment cost, long service life, etc.

Description

A device for removing detergent in catering wastewater

technical field

The invention belongs to the field of sewage treatment, relates to the field of catering wastewater treatment, in particular to a device for removing detergent in catering wastewater.

Background technique

Catering wastewater containing detergent is a kind of refractory toxic organic polluted wastewater. According to the test results of the sewage pollution indicators of the catering industry in several major cities in China: BOD is 300-500mg/L, COD is about 1000mg/L, and oil is 150-421mg/L, the average value of ammonia nitrogen is 6-50mg/L, and SS is 300-568 mg/L. It can be seen that catering wastewater is a high-concentration pollution source and one of the main reasons for the pollution of water bodies around cities. The waste water has a high concentration of organic matter and a low pretreatment rate. If it is discharged into the urban pipe network without treatment or if the treatment fails to meet the standard, it will put a lot of pressure on the urban sewage treatment plant. The problem is even more serious in areas where the pipeline network is not complete. Catering waste water containing detergent is directly discharged into nearby water bodies, which not only affects the environment, but also endangers people's physical and mental health.

Traditionally, there are physical methods, chemical methods, electrochemical methods, biochemical methods, and membrane methods to remove detergents from catering wastewater. Physical treatment is generally by adding coagulant to precipitate some organic matter in wastewater. This method is simple and easy, but the removal of organic matter is not thorough, and chemical sludge is produced, and supporting sludge treatment facilities are required; chemical methods generally use advanced Oxidation method, this method can effectively remove organic matter in water, but the operating cost is too high; the electrochemical method also has the problem of high operating cost, and the electrode plate needs to be replaced after being polluted; the price of the membrane component is too high, and the cleaning and recovery of the membrane And other technologies have yet to be further resolved.

Contents of the invention

Aiming at the problems of poor treatment effect and high cost investment in the prior art, the present invention provides a device for removing detergent in catering wastewater, through the separation of oily substances, air flotation, emulsification, magnetized micro-electrolysis, demulsification and aerobic Precipitation, so as to achieve the purpose of removing detergent in catering wastewater; the invention has the characteristics of good treatment effect, stable operation, low input cost and long service life.

In order to achieve the above purpose, the technical solution adopted in the present invention is: a device for removing detergent in catering wastewater, which consists of a water inlet chamber (1), an oil separation chamber (2), a micro-nano air flotation chamber (3 ), detergent concentrate emulsification chamber (4), magnetized micro-electrolysis reaction tank (5), demulsification chamber (6), aerobic-precipitation mixed construction chamber (7).

A coarse grille (8) and a fine grille (9) are sequentially provided between the water inlet chamber (1) and the oil separation chamber (2), and the water outlet tank (10) in the middle of the oil separation chamber (2) It is connected with the micro-nano air flotation chamber (3), and the oil overflow tank (11) on both sides of the water outlet tank (10) is connected with the oil storage tank (12) at the bottom of the oil separation chamber (2).

The top of the micro-nano air flotation chamber (3) is connected to the detergent concentrate emulsification chamber (4) through the overflow baffle (13), and the bottom end is connected to the magnetized micro-electrolysis reaction tank (5) through the water seepage hole (14) Connected, the detergent concentrate emulsification chamber (4) concentrates the detergent into a collection pool (15) and then sends it to the magnetized micro-electrolysis reaction tank (5), and the magnetization micro-electrolysis reaction tank (5) is connected to the demulsification chamber (6), The effluent from the demulsification chamber (6) is sent to the aerobic-sedimentation mixed chamber (7) through the hydrolysis and acidification tank (16). The aerobic-sedimentation mixed chamber (7) is equipped with at least two aerators (17) and A flocculation sedimentation tank (18).

Both ends of the flocculation and sedimentation tank (18) are respectively provided with an outlet pipe (19) and a return pipe (20) connected to the micro-nano air flotation chamber (3).

The application method of a device for removing detergent in catering wastewater of the present invention is: the catering wastewater containing detergent passes through the water inlet chamber (1) through the coarse grid (8), the fine grid (9) and the oil separation chamber (2) After the grease is separated, it enters the micro-nano air flotation chamber (3), and the particulate matter in the upper layer of the air flotation chamber enters the detergent concentrate emulsification chamber (4) through the overflow baffle (13) for concentration and emulsification, and then passes through a The collection tank (15) is sent to the magnetized micro-electrolysis reaction tank (5) for electrolysis, and the demulsification chamber (6) is demulsified and then hydrolyzed and acidified, and finally aerobic precipitation is carried out. The supernatant is discharged from the outlet pipe (19) for flocculation and precipitation The material is returned to the micro-nano air flotation chamber (3) through the return pipe (20) to continue the above-mentioned treatment.

The working principle of a device for removing detergent in catering wastewater of the present invention is: the catering wastewater containing detergent passes through the water inlet chamber (1) through the coarse grid (8), the fine grid (9) and the oil separation chamber (2) After separating the grease, enter the micro-nano air flotation chamber (3), and use micro-nano bubbles for air flotation, so that small particles of detergent adhere to the bubbles and float to the upper end of the air flotation chamber, and pass through the overflow baffle ( 13) Enter the detergent concentrate emulsification chamber (4) to concentrate and emulsify, separate the detergent and water, and then convert the toxic substances into non-toxic and low-toxic substances through electrolysis, and then pass the demulsification, so that the detergent cannot be biodegraded Part of the substance breaks into small molecules, which can be directly treated by aerobic treatment, which solves the problem of difficult degradation of substances in detergents and achieves the purpose of removing detergents in catering wastewater.

The beneficial effect of the present invention lies in that the present invention concentrates the detergent and other substances in the catering wastewater into a collection pool for further emulsification by separating the grease substances in the catering wastewater containing detergent, and then using micro-nano bubbles for air flotation. And magnetized micro-electrolysis, and then through demulsification, so that some substances in the detergent that cannot be biodegraded are broken into small molecules, which can be directly treated with aerobic treatment without anaerobic treatment, which solves the problem that the substances in the washing process are difficult to degrade ; It has the advantages of good treatment effect, stable operation, low input cost and long service life.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Among them: 1. Water inlet chamber; 2. Oil separation chamber; 3. Micro-nano air flotation chamber; 4. Detergent concentrate emulsification chamber; 5. Magnetized micro-electrolysis reaction tank; 6. Demulsification chamber; 7. Aerobic -Sedimentation mixed construction room; 8. Coarse grille; 9. Fine grille; 10. Outlet tank; 11. Oil overflow tank; 12. Oil storage tank; 13. Overflow baffle; 14. Seepage hole; 15. Collection tank ; 16, hydrolysis acidification tank; 17, aerator; 18, flocculation sedimentation tank; 19, outlet pipe; 20, return pipe.

Detailed ways

The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

As shown in Figure 1, the invention provides a device for removing detergent in catering wastewater, which consists of a water inlet chamber (1), an oil separation chamber (2), a micro-nano air flotation chamber (3), Concentrated liquid emulsification chamber (4), magnetized micro-electrolysis reaction tank (5), demulsification chamber (6), aerobic-precipitation mixed construction chamber (7); water inlet chamber (1) and oil separation chamber (2) Coarse grids (8) and fine grids (9) are arranged in sequence between them. The water outlet tank (10) in the middle of the oil separation chamber (2) is connected to the micro-nano air flotation chamber (3), and the two water outlet tanks (10) The oil overflow tank (11) on the side is connected to the oil storage tank (12) at the bottom of the oil separation chamber (2); the top of the micro-nano air flotation chamber (3) is connected to the detergent concentrate emulsification chamber ( 4) are connected, the bottom end communicates with the magnetized micro-electrolysis reaction tank (5) through the water seepage hole (14), and the detergent concentrate emulsification chamber (4) concentrates the detergent into a collection pool (15) and then sends it into the magnetization micro-electrolysis reaction The tank (5), the magnetized micro-electrolysis reaction tank (5) is connected to the demulsification chamber (6), and the effluent from the demulsification chamber (6) is sent to the aerobic-precipitation mixed construction chamber (7) through the hydrolysis and acidification tank (16). - There are at least two aerators (17) and a flocculation sedimentation tank (18) in the sedimentation mixing room (7); the two ends of the flocculation sedimentation tank (18) are respectively equipped with outlet pipes (19) and micro-nano The return pipe (20) connected to the air flotation chamber (3).

When the device for removing detergent in catering wastewater provided by the present invention is used, the catering wastewater containing detergent passes through the water inlet chamber (1) through the coarse grid (8), fine grid (9) and oil separation chamber ( 2) After the grease is separated, it enters the micro-nano air flotation chamber (3), and the particulate matter in the upper layer of the air flotation chamber enters the detergent concentrate emulsification chamber (4) through the overflow baffle (13) for concentration and emulsification, and then passes through a collection The pool (15) is sent to the magnetized micro-electrolysis reaction tank (5) for electrolysis, and the demulsification chamber (6) undergoes demulsification, hydrolysis and acidification, and finally aerobic precipitation. The supernatant is discharged from the outlet pipe (19) to flocculate the sediment Backflow from the return pipe (20) to the micro-nano air flotation chamber (3) to continue the above treatment until the purpose of removing the detergent in the catering wastewater is achieved; the removal rate of the detergent in the catering wastewater treated by the device of the present invention is over 99% , in line with national sewage treatment standards.

The preferred implementation of the present invention described above, it should be pointed out that for those skilled in the art, without departing from the structure of the present invention, some modifications and improvements can also be made, and these should also be regarded as the present invention. protection scope, these will not affect the effect of the present invention and the practicability of the patent.

Claims (4)

1. a device of removing washing composition in food and drink waste water, is characterized in that: this device consists of intake chamber (1), oil removal separate chamber (2), micro-nano gas-floating chamber (3), washing composition concentrated solution emulsion chamber (4), magnetization micro-electrolysis reaction groove (5), breakdown of emulsion chamber (6), the mixed chamber (7) of building of aerobic-precipitation.

2. a kind of device of removing washing composition in food and drink waste water according to claim 1, it is characterized in that: between described intake chamber (1) and oil removal separate chamber (2), be provided with successively coarse rack (8) and fine fack (9), the effluent trough (10) at middle part, oil removal separate chamber (2) is connected with micro-nano gas-floating chamber (3), and the oil spilling groove (11) of effluent trough (10) both sides connects the oil storage vessel (12) of bottom, oil removal separate chamber (2).

3. a kind of device of removing washing composition in food and drink waste water according to claim 1 and 2, it is characterized in that: the top of described micro-nano gas-floating chamber (3) is connected with washing composition concentrated solution emulsion chamber (4) by over-pass (13), bottom is communicated with magnetization micro-electrolysis reaction groove (5) by water seepage hole (14), washing composition concentrated solution emulsion chamber (4) is concentrated to washing composition in a collecting tank (15) and sends into and magnetize micro-electrolysis reaction groove (5), magnetization micro-electrolysis reaction groove (5) connects breakdown of emulsion chamber (6), the mixed chamber (7) of building of aerobic-precipitation that breakdown of emulsion chamber (6) water outlet is sent into through acidication groove (16), aerobic-precipitation is mixed builds and in chamber (7), is provided with at least two aerators (17) and a flocculation sedimentation tank (18).

4. a kind of device of removing washing composition in food and drink waste water according to claim 3, is characterized in that: the return line (20) that the two ends of described flocculation sedimentation tank (18) are respectively equipped with rising pipe (19) and are connected with micro-nano gas-floating chamber (3).

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