Wastewater treatment device and process for garbage transfer station

Abstract

The invention discloses a wastewater treatment device and process for a garbage transfer station, comprising a homogenizing tank, an integrated oil-separating anoxic tank, an integrated anaerobic tank, an integrated anoxic tank, a first integrated aerobic tank, a second integrated aerobic tank, a third integrated aerobic tank, an integrated water production tank, an ultraviolet disinfection device, a sludge temporary storage tank and a deodorizing device. The invention is suitable for wastewater treatment. The device of the invention has a compact structure, a small footprint, and a low cost. The wastewater has a short residence time between various structures, is not easy to precipitate, has a fast treatment speed, and is highly efficient. The process of the invention can ensure the sludge balance in various treatment tanks, and thus can avoid the accumulation of salt, so that the entire system can operate for a long time.

Description

Technical Field

[0001] The invention belongs to the field of technical sewage treatment, and specifically relates to a sewage treatment device and process for a garbage transfer station. Background Art

[0002] Garbage transfer stations are garbage transfer stations set up between the garbage production area (or concentrated location) and the treatment plant in order to reduce the transportation cost of garbage removal. Domestic garbage is initially compressed in the front-end collection station and then transported to the garbage transfer station by garbage trucks. Garbage transfer stations are important hubs for urban garbage collection and treatment, and are an indispensable link in the urban domestic garbage collection, transportation and disposal system. Garbage transfer stations generate a large amount of sewage during operation, and its COD concentration is usually 50 to 200 times that of ordinary domestic sewage. At present, only 5% of large and medium-sized garbage transfer stations in China are equipped with sewage treatment systems, and the current status of domestic small-scale garbage transfer station sewage and mobile garbage transfer station sewage discharge is directly discharged into the urban sewage network (even directly into surface water). There are many sources of sewage in garbage transfer stations, and the sources are different, the properties are different, and the collection and treatment methods are also different. The wastewater generated by garbage transfer stations mainly includes domestic wastewater, flushing wastewater, and garbage leachate. The characteristics of sewage are high pollutant concentration, large range of water quality changes, strong odor, and black or gray-brown color.

[0003] Patent CN205133343U discloses a wastewater treatment system for a garbage transfer station, including a grid well for collecting wastewater, a regulating tank, a biological septic tank, a Class A biological tank, a Class O biological tank, a composite medium percolation layer and a disinfection tank. The system uses a traditional biochemical process that requires a long residence time and the equipment occupies a large area.

[0004] Patent CN108975644A discloses a garbage leachate treatment system and device, wherein the garbage leachate treatment device includes a regulating tank, a coagulation tank, a Fenton tank, a sedimentation tank, a membrane bioreactor (MBR), a sand filter, and a reverse osmosis membrane (DTRO) connected in sequence. The concentrated water produced by the reverse osmosis membrane in the device enters the regulating tank, which will cause salt accumulation and the system cannot operate for a long time. Summary of the invention

[0005] The purpose of the present invention is to overcome the defects of the prior art and provide a wastewater treatment device and process for a garbage transfer station.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A wastewater treatment device and process for a garbage transfer station includes a homogenizing tank, an integrated oil-separating anoxic tank, an integrated anaerobic tank, an integrated anoxic tank, a first integrated aerobic tank, a second integrated aerobic tank, a third integrated aerobic tank, an integrated water production tank, an ultraviolet disinfection device, a temporary sludge storage tank and a deodorization device, wherein:

[0008] The homogenizing tank is connected to the integrated oil-separating anoxic tank through a raw water pump, and the integrated oil-separating anoxic tank, the integrated anaerobic tank, the integrated anoxic tank, the first integrated aerobic tank, the second integrated aerobic tank, and the third integrated aerobic tank are connected in sequence;

[0009] The deodorizing device is connected to the integrated oil-separating anoxic tank, the integrated anaerobic tank, the integrated anoxic tank, the first integrated aerobic tank, the second integrated aerobic tank, and the third integrated aerobic tank one by one;

[0010] The first integrated aerobic tank, the second integrated aerobic tank, and the third integrated aerobic tank are connected to the integrated oil-separating anoxic tank via an air stripping reflux device;

[0011] The third integrated aerobic tank is connected to the integrated oil-separating anoxic tank, the integrated anaerobic tank, the integrated anoxic tank, the first integrated aerobic tank, the second integrated aerobic tank and the sludge temporary storage tank one by one through a reflux sludge pump;

[0012] An MBR device is arranged inside the third integrated aerobic pool, and the MBR device is connected to the integrated water production pool through a water production pump, and the integrated water production pool is connected to the ultraviolet disinfection device.

[0013] Preferably, it further comprises a blower, and the blower is respectively connected to the inside of the first integrated aerobic pool, the second integrated aerobic pool, and the third integrated aerobic pool.

[0014] Preferably, the integrated oil-separation anoxic tank, the integrated anaerobic tank and the integrated anoxic tank are all provided with a stirrer.

[0015] Preferably, the deodorizing device comprises a deodorizing tower and a deodorizing blower.

[0016] Preferably, highly salt-tolerant facultative oxic bacteria are placed in the first integrated aerobic pool and the second integrated aerobic pool.

[0017] Preferably, the MBR device adopts a flat or soft film MBR membrane component.

[0018] Preferably, the deep treatment equipment is also included, and the deep treatment equipment is arranged between the third integrated aerobic tank and the integrated water production tank. The deep treatment equipment includes one of the following: an electrocatalytic oxidation device, an ozone oxidation device.

[0019] Preferably, it also includes an integrated equipment room, in which the blower, water production pump, deep processing device, ultraviolet disinfection device, reflux sludge pump and control equipment are all arranged.

[0020] Preferably, the integrated oil-separating anoxic tank is made of fiberglass, the gas lift reflux device is of an up-and-down floating type, and a grid is provided in the homogenizing tank.

[0021] The present invention also discloses a process for a wastewater treatment device at a garbage transfer station, and the specific steps are as follows:

[0022] (S1), the leachate to be treated enters the homogenization tank, and after being filtered through the grid, it enters the integrated oil-separation anoxic tank, the integrated anaerobic tank, the integrated anoxic tank, the first integrated aerobic tank, the second integrated aerobic tank, and the third integrated aerobic tank in sequence under the action of the raw water pump. When entering the integrated oil-separation anoxic tank, the integrated anaerobic tank, and the integrated anoxic tank, the internal agitator thereof is stirred to accelerate the reaction;

[0023] (S2), adding highly salt-tolerant anaerobic bacteria to the first integrated aerobic pool and the second integrated aerobic pool, and returning the mixed liquid in the first integrated aerobic pool, the second integrated aerobic pool, and the third integrated aerobic pool to the integrated oil-separating anoxic pool through the air lift reflux device for secondary reaction;

[0024] (S3), a portion of the sludge in the third integrated aerobic tank can be returned to the integrated oil-separating anoxic tank, the integrated anaerobic tank, the integrated anoxic tank, the first integrated aerobic tank, and the second integrated aerobic tank through a reflux sludge pump, and the excess portion flows into the sludge temporary storage tank for storage, and then compressed by a sludge compressor, and aerated by a blower to the first integrated aerobic tank, the second integrated aerobic tank, and the third integrated aerobic tank;

[0025] (S4), a deodorizing device deodorizes the integrated oil-separating anoxic tank, the integrated anaerobic tank, the integrated anoxic tank, the first integrated aerobic tank, the second integrated aerobic tank, and the third integrated aerobic tank;

[0026] (S5) After the wastewater in the third integrated aerobic pool is treated by the MBR device, the water that meets the standards enters the integrated water production pool under the action of the water production pump, and the water that does not meet the standards enters the integrated water production pool after being treated by the deep treatment equipment. The water in the integrated water production pool enters the receiving pipe after being disinfected by the ultraviolet disinfection device, completing the treatment process.

[0027] The wastewater treatment device for the garbage transfer station of the present invention has a compact structure, small footprint, low cost, and a short retention time of wastewater between various structures, is not easy to precipitate, has a fast treatment speed, and is highly efficient;

[0028] In the wastewater treatment process of the garbage transfer station of the present invention, highly salt-tolerant facultative aerobic bacteria are placed in the first integrated aerobic tank and the second integrated aerobic tank, and the mixed liquid in the first integrated aerobic tank, the second integrated aerobic tank and the third integrated aerobic tank is refluxed to the integrated oil-separation anoxic tank for secondary reaction through the air lift reflux device, and at the same time, a part of the sludge in the third integrated aerobic tank can be refluxed to the integrated oil-separation anoxic tank, the integrated anaerobic tank, the integrated anoxic tank, the first integrated aerobic tank and the second integrated aerobic tank through the reflux sludge pump, and the excess part flows into the sludge temporary storage tank for storage, thereby ensuring the sludge balance in each treatment tank, and thus avoiding the accumulation of salt, so that the whole system can operate for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is the overall flow chart of the present invention. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1 , further illustrating the specific implementation of a wastewater treatment device and process for a garbage transfer station of the present invention. A wastewater treatment device and process for a garbage transfer station of the present invention is not limited to the description of the following embodiments.

[0031] Embodiment 1:

[0032] This embodiment provides a wastewater treatment device for a garbage transfer station, such as Figure 1 As shown, it includes a homogenization tank, an integrated oil-separation anoxic tank, an integrated anaerobic tank, an integrated anoxic tank, a first integrated aerobic tank, a second integrated aerobic tank, a third integrated aerobic tank, an integrated water production tank, an ultraviolet disinfection device, a temporary sludge storage tank and a deodorization device, among which,

[0033] The homogenization tank is connected to the integrated oil-separation anoxic tank through a raw water pump, and the integrated oil-separation anoxic tank, the integrated anaerobic tank, the integrated anoxic tank, the first integrated aerobic tank, the second integrated aerobic tank, and the third integrated aerobic tank are connected in sequence;

[0034] The deodorizing device is connected to the integrated oil-separating anoxic tank, the integrated anaerobic tank, the integrated anoxic tank, the first integrated aerobic tank, the second integrated aerobic tank, and the third integrated aerobic tank one by one;

[0035] The first integrated aerobic pool, the second integrated aerobic pool, and the third integrated aerobic pool are connected to the integrated oil-separating anoxic pool through an air lift reflux device;

[0036] The third integrated aerobic tank is connected to the integrated oil-separating anoxic tank, the integrated anaerobic tank, the integrated anoxic tank, the first integrated aerobic tank, the second integrated aerobic tank and the sludge temporary storage tank one by one through a reflux sludge pump;

[0037] An MBR device is arranged inside the third integrated aerobic pool. The MBR device is connected to the integrated water production pool through a water production pump, and the integrated water production pool is connected to the ultraviolet disinfection device.

[0038] It also includes a blower, which is respectively connected to the inside of the first integrated aerobic pool, the second integrated aerobic pool, and the third integrated aerobic pool.

[0039] Agitators are installed inside the integrated oil-water anoxic tank, the integrated anaerobic tank and the integrated anoxic tank.

[0040] The deodorizing device comprises a deodorizing tower and a deodorizing fan.

[0041] Highly salt-tolerant facultative aerobic bacteria are placed in the first integrated aerobic pool and the second integrated aerobic pool.

[0042] The MBR device uses flat or soft MBR membrane components.

[0043] It also includes deep processing equipment, which is arranged between the third integrated aerobic tank and the integrated water production tank. The deep processing equipment includes one of the following: an electrocatalytic oxidation device, an ozone oxidation device.

[0044] It also includes an integrated equipment room, where the blower, water production pump, deep processing device, ultraviolet disinfection device, return sludge pump and control equipment are all installed.

[0045] The integrated oil-water anoxic tank is made of fiberglass, the air lift reflux device is of up and down floating type, and a grid is installed in the homogenizing tank.

[0046] Embodiment 2:

[0047] The present invention also discloses a process for a wastewater treatment device at a garbage transfer station, such as Figure 1 As shown, the specific steps are as follows:

[0048] (S1), the leachate to be treated enters the homogenization tank, and after being filtered through the grid, it enters the integrated oil-separation anoxic tank, the integrated anaerobic tank, the integrated anoxic tank, the first integrated aerobic tank, the second integrated aerobic tank, and the third integrated aerobic tank in sequence under the action of the raw water pump. When entering the integrated oil-separation anoxic tank, the integrated anaerobic tank, and the integrated anoxic tank, the internal agitator thereof is stirred to accelerate the reaction;

[0049] (S2), adding highly salt-tolerant anaerobic bacteria to the first integrated aerobic pool and the second integrated aerobic pool, and returning the mixed liquid in the first integrated aerobic pool, the second integrated aerobic pool, and the third integrated aerobic pool to the integrated oil-separating anoxic pool through the air lift reflux device for secondary reaction;

[0050] (S3), a portion of the sludge in the third integrated aerobic tank can be returned to the integrated oil-separating anoxic tank, the integrated anaerobic tank, the integrated anoxic tank, the first integrated aerobic tank, and the second integrated aerobic tank through a reflux sludge pump, and the excess portion flows into the sludge temporary storage tank for storage, and then compressed by a sludge compressor, and aerated by a blower to the first integrated aerobic tank, the second integrated aerobic tank, and the third integrated aerobic tank;

[0051] (S4), a deodorizing device deodorizes the integrated oil-separating anoxic tank, the integrated anaerobic tank, the integrated anoxic tank, the first integrated aerobic tank, the second integrated aerobic tank, and the third integrated aerobic tank;

[0052] (S5) After the wastewater in the third integrated aerobic pool is treated by the MBR device, the water that meets the standards enters the integrated water production pool under the action of the water production pump, and the water that does not meet the standards enters the integrated water production pool after being treated by the deep treatment equipment. The water in the integrated water production pool enters the receiving pipe after being disinfected by the ultraviolet disinfection device, completing the treatment process.

[0053] It can be seen from the combination of Example 1 and Example 2 that the waste transfer station sewage treatment device of the present invention has a compact structure, a small footprint, low cost, and a short residence time of sewage between various structures, is not easy to precipitate, has a fast treatment speed, and is highly efficient;

[0054] In the wastewater treatment process of the garbage transfer station of the present invention, highly salt-tolerant facultative aerobic bacteria are placed in the first integrated aerobic tank and the second integrated aerobic tank, and the mixed liquid in the first integrated aerobic tank, the second integrated aerobic tank and the third integrated aerobic tank is refluxed to the integrated oil-separation anoxic tank for secondary reaction through the air lift reflux device, and at the same time, a part of the sludge in the third integrated aerobic tank can be refluxed to the integrated oil-separation anoxic tank, the integrated anaerobic tank, the integrated anoxic tank, the first integrated aerobic tank and the second integrated aerobic tank through the reflux sludge pump, and the excess part flows into the sludge temporary storage tank for storage, thereby ensuring the sludge balance in each tank, avoiding the accumulation of salt, and allowing the entire system to operate for a long time.

[0055] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A wastewater treatment device for a garbage transfer station, characterized in that: It includes a homogenization tank, an integrated oil-separation anoxic tank, an integrated anaerobic tank, an integrated anoxic tank, a first integrated aerobic tank, a second integrated aerobic tank, a third integrated aerobic tank, an integrated water production tank, an ultraviolet disinfection device, a temporary sludge storage tank and a deodorization device, among which: The homogenizing tank is connected to the integrated oil-separating anoxic tank through a raw water pump, and the integrated oil-separating anoxic tank, the integrated anaerobic tank, the integrated anoxic tank, the first integrated aerobic tank, the second integrated aerobic tank, and the third integrated aerobic tank are connected in sequence; The deodorizing device is connected to the integrated oil-separating anoxic tank, the integrated anaerobic tank, the integrated anoxic tank, the first integrated aerobic tank, the second integrated aerobic tank, and the third integrated aerobic tank one by one; The first integrated aerobic tank, the second integrated aerobic tank, and the third integrated aerobic tank are connected to the integrated oil-separating anoxic tank via an air stripping reflux device; The third integrated aerobic tank is connected to the integrated oil-separating anoxic tank, the integrated anaerobic tank, the integrated anoxic tank, the first integrated aerobic tank, the second integrated aerobic tank and the sludge temporary storage tank one by one through a reflux sludge pump; The third integrated aerobic pool is provided with an MBR device inside, the MBR device is connected to the integrated water production pool through a water production pump, and the integrated water production pool is connected to the ultraviolet disinfection device; It also includes a blower, which is connected to the inside of the first integrated aerobic pool, the second integrated aerobic pool, and the third integrated aerobic pool respectively; It also includes deep processing equipment, which is arranged between the third integrated aerobic tank and the integrated water production tank, and includes one of the following: an electrocatalytic oxidation device, an ozone oxidation device.

2. A wastewater treatment device for a garbage transfer station as claimed in claim 1, characterized in that: Agitators are arranged inside the integrated oil-separating anoxic tank, the integrated anaerobic tank and the integrated anoxic tank.

3. A wastewater treatment device for a garbage transfer station as claimed in claim 1, characterized in that: The deodorizing device comprises a deodorizing tower and a deodorizing fan.

4. A wastewater treatment device for a garbage transfer station as claimed in claim 1, characterized in that: Highly salt-tolerant facultative aerobic bacteria are placed in the first integrated aerobic pool and the second integrated aerobic pool.

5. A wastewater treatment device for a garbage transfer station as claimed in claim 1, characterized in that: The MBR device adopts a flat plate or a soft film MBR membrane component.

6. A wastewater treatment device for a garbage transfer station as claimed in claim 1, characterized in that: It also includes an integrated equipment room, in which the blower, water production pump, deep processing device, ultraviolet disinfection device, reflux sludge pump and control equipment are all arranged.

7. A wastewater treatment device for a garbage transfer station as claimed in claim 1, characterized in that: The integrated oil-separating oxygen-deficient tank is made of fiberglass, the gas lift reflux device is of an up-and-down floating type, and a grid is provided in the homogenizing tank.

8. A process for a wastewater treatment device for a garbage transfer station as claimed in any one of claims 1 to 7, characterized in that: The specific steps are as follows: (S1), the leachate to be treated enters the homogenization tank, and after being filtered through the grid, it enters the integrated oil-separation anoxic tank, the integrated anaerobic tank, the integrated anoxic tank, the first integrated aerobic tank, the second integrated aerobic tank, and the third integrated aerobic tank in sequence under the action of the raw water pump. When entering the integrated oil-separation anoxic tank, the integrated anaerobic tank, and the integrated anoxic tank, the internal agitator thereof is stirred to accelerate the reaction; (S2), adding highly salt-tolerant anaerobic bacteria to the first integrated aerobic pool and the second integrated aerobic pool, and returning the mixed liquid in the first integrated aerobic pool, the second integrated aerobic pool, and the third integrated aerobic pool to the integrated oil-separating anoxic pool through the air lift reflux device for secondary reaction; (S3), returning part of the sludge in the third integrated aerobic tank to the integrated oil-separating anoxic tank, the integrated anaerobic tank, the integrated anoxic tank, the first integrated aerobic tank, and the second integrated aerobic tank through a reflux sludge pump, and the excess part flows into the sludge temporary storage tank for storage, and then is compressed by a sludge compressor, and aerated by a blower to the first integrated aerobic tank, the second integrated aerobic tank, and the third integrated aerobic tank; (S4), a deodorizing device deodorizes the integrated oil-separating anoxic tank, the integrated anaerobic tank, the integrated anoxic tank, the first integrated aerobic tank, the second integrated aerobic tank, and the third integrated aerobic tank; (S5) After the wastewater in the third integrated aerobic pool is treated by the MBR device, the water that meets the standards enters the integrated water production pool under the action of the water production pump, and the water that does not meet the standards enters the integrated water production pool after being treated by the deep treatment equipment. The water in the integrated water production pool enters the receiving pipe after being disinfected by the ultraviolet disinfection device, completing the treatment process.

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