Oily wastewater treatment process

Abstract

The invention discloses an oily wastewater treatment process. The process comprises a wastewater treatment device provided with a water inlet pipe and a water outlet pipe, the wastewater treatment device comprises three metal rings forming concentric circles from inside to outside, the three metal rings can form a first electric field and a second electric field after being electrified, and the wastewater treatment device is provided with an electrolytic reaction zone I, a contact zone II and an electrooxidation reaction zone III. The electrolytic reaction zone I is a first-stage treatment unit and mainly provides coagulant such as aluminum hydroxide or ferric hydroxide and a large number of microbubbles. The contact area II serves as a second treatment unit, is arranged on the upper portion of the electrolytic reaction area I and mainly provides sufficient contact time and space for coagulant, suspended particles, oil drops and microbubbles. The electro-oxidation reaction zone III is a third-stage treatment unit and is mainly used for removing refractory organic matters in the wastewater through electro-oxidation. Finally, the wastewater reaching the discharge standard can be discharged into the environment.

Description

technical field

[0001] The invention relates to the technical field of wastewater treatment, in particular to an oily wastewater treatment process. Background technique

[0002] At present, the amount of kitchen waste in our country is increasing year by year, and the pollution to the environment is getting bigger and bigger.

[0003] Kitchen waste is the most common waste generated in daily life in cities. It belongs to urban domestic waste and mainly comes from catering services, canteens of enterprises and institutions, food processing enterprises, urban sewers and grease traps, and households.

[0004] Kitchen waste mainly contains organic matter such as starch, cellulose, protein, and animal and vegetable oils. If it cannot be processed in time, it will easily deteriorate and breed harmful substances such as pathogenic bacteria, and then produce a large amount of poisonous and foul-smelling gases, seriously affecting people's health and quality of life.

[0005] The r...

Examples

Embodiment 1

[0039]Embodiment 1: the concrete structure of the present invention is as follows:

[0040] Please refer to attached Figure 1-2 , a kind of oily waste water treatment process of the present invention, this process comprises a waste water treatment device that is provided with water inlet pipe 8 and water outlet pipe 17, and this waste water treatment device comprises three metal rings 1 that form concentric circles from inside to outside, three A first electric field and a second electric field can be formed after a metal ring 1 is energized, and the process includes the following steps:

[0041] Step 1, performing demulsification treatment on the oily wastewater treated by the grease trap;

[0042] In step 2, the oily wastewater after demulsification treatment in step 1 enters the inner ring cavity in the wastewater treatment device through the water inlet pipe 8, and the lower part of the inner ring cavity is provided with an electrode reaction assembly and an electrode re...

Embodiment 2

[0060] The following is the working principle of the oily wastewater treatment process of an embodiment in this embodiment:

[0061] The oily wastewater enters the integrated treatment device from the water inlet pipe 8, and under the action of the swirl generator 9, the wastewater rotates up in the reactor.

[0062] The waste water enters the electrolysis reaction zone Ⅰ, where two stainless steel rings connected to the DC power supply 7 are placed. The distance between the middle ring and the inner ring is 40-60 cm. There are aluminum or iron sensing electrodes, and the distance between the aluminum or iron sensing electrodes is 5-10cm.

[0063] Turn on the DC power supply and adjust the current density of the stainless steel electrode to 10A / m 2 ~100A / m 2 , at this time, a second electric field is generated between the stainless steel rings, so the surfaces of the aluminum or iron electrodes form cathodes and anodes respectively. On the surface of the anode, the aluminum...

Embodiment 3

[0069] The following is an oily wastewater treatment process of an embodiment in this embodiment, which specifically includes the following steps:

[0070] Step 1: Demulsify the oily wastewater treated in the grease trap, and then enter the integrated electrochemical treatment device through the water inlet pipe 8;

[0071] Step 2, the oily wastewater enters the electrolysis reaction zone I through the swirl generator 9, inserts aluminum rings into the electrode slot 2, the distance between each aluminum ring is 5cm, and adjusts the current density to 10A / m 2 , electrolysis for 10min;

[0072] Step 3, the electrolyzed wastewater enters the contact zone II, and the pH is adjusted to 7, and a 2 mg / L polyacrylamide solution is added;

[0073] Step 4, under the action of swirling flow, aluminum hydroxide colloid, polymer flocculant, suspended particles, oil droplets and micro-bubbles are fully contacted, and rise to the water surface to form scum, which is scraped out by the scra...

technical field

[0001] The invention relates to the technical field of wastewater treatment, in particular to an oily wastewater treatment process. Background technique

[0002] At present, the amount of kitchen waste in our country is increasing year by year, and the pollution to the environment is getting bigger and bigger.

[0003] Kitchen waste is the most common waste generated in daily life in cities. It belongs to urban domestic waste and mainly comes from catering services, canteens of enterprises and institutions, food processing enterprises, urban sewers and grease traps, and households.

[0004] Kitchen waste mainly contains organic matter such as starch, cellulose, protein, and animal and vegetable oils. If it cannot be processed in time, it will easily deteriorate and breed harmful substances such as pathogenic bacteria, and then produce a large amount of poisonous and foul-smelling gases, seriously affecting people's health and quality of life.

[0005] The r...

Examples

Embodiment 1

[0039]Embodiment 1: the concrete structure of the present invention is as follows:

[0040] Please refer to attached Figure 1-2 , a kind of oily waste water treatment process of the present invention, this process comprises a waste water treatment device that is provided with water inlet pipe 8 and water outlet pipe 17, and this waste water treatment device comprises three metal rings 1 that form concentric circles from inside to outside, three A first electric field and a second electric field can be formed after a metal ring 1 is energized, and the process includes the following steps:

[0041] Step 1, performing demulsification treatment on the oily wastewater treated by the grease trap;

[0042] In step 2, the oily wastewater after demulsification treatment in step 1 enters the inner ring cavity in the wastewater treatment device through the water inlet pipe 8, and the lower part of the inner ring cavity is provided with an electrode reaction assembly and an electrode re...

Embodiment 2

[0060] The following is the working principle of the oily wastewater treatment process of an embodiment in this embodiment:

[0061] The oily wastewater enters the integrated treatment device from the water inlet pipe 8, and under the action of the swirl generator 9, the wastewater rotates up in the reactor.

[0062] The waste water enters the electrolysis reaction zone Ⅰ, where two stainless steel rings connected to the DC power supply 7 are placed. The distance between the middle ring and the inner ring is 40-60 cm. There are aluminum or iron sensing electrodes, and the distance between the aluminum or iron sensing electrodes is 5-10cm.

[0063] Turn on the DC power supply and adjust the current density of the stainless steel electrode to 10A / m 2 ~100A / m 2 , at this time, a second electric field is generated between the stainless steel rings, so the surfaces of the aluminum or iron electrodes form cathodes and anodes respectively. On the surface of the anode, the aluminum...

Embodiment 3

[0069] The following is an oily wastewater treatment process of an embodiment in this embodiment, which specifically includes the following steps:

[0070] Step 1: Demulsify the oily wastewater treated in the grease trap, and then enter the integrated electrochemical treatment device through the water inlet pipe 8;

[0071] Step 2, the oily wastewater enters the electrolysis reaction zone I through the swirl generator 9, inserts aluminum rings into the electrode slot 2, the distance between each aluminum ring is 5cm, and adjusts the current density to 10A / m 2 , electrolysis for 10min;

[0072] Step 3, the electrolyzed wastewater enters the contact zone II, and the pH is adjusted to 7, and a 2 mg / L polyacrylamide solution is added;

[0073] Step 4, under the action of swirling flow, aluminum hydroxide colloid, polymer flocculant, suspended particles, oil droplets and micro-bubbles are fully contacted, and rise to the water surface to form scum, which is scraped out by the scra...

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