Treatment system for road sweeping wastewater and percolate

Abstract

The utility model provides a road sweeping wastewater and leachate treatment system, the treatment system comprises: a first sewage pool, a second sewage pool, a first treatment assembly and a second treatment assembly, the first sewage pool is used for receiving road sweeping wastewater, the second sewage pool is used for receiving leachate, the first treatment assembly comprises a screening area and a dosing area, and the second treatment assembly comprises a screening area and a dosing area. The second treatment assembly comprises an adjusting area, an acidification pollution discharge area and a membrane biological reaction area, the adjusting area is connected with the second sewage pool, the acidification pollution discharge area comprises a hydrolysis acidification pool and a mud tank, the hydrolysis acidification pool is connected with the adjusting area, the mud tank is used for storing mud discharged by the hydrolysis acidification pool, and the membrane biological reaction area is connected with the membrane biological reaction area. And the membrane biological reaction zone is connected with the hydrolysis acidification pool. The treatment system for the road sweeping wastewater and the percolate can treat the wastewater in a classified manner, and is low in maintenance and use cost.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater treatment, and in particular to a treatment system for road sweeping wastewater and leachate. Background Art

[0002] When the road sweeper is cleaning the road, it uses spray to reduce dust on the ground, and the sweeping disc and suction cup collect branches, leaves, debris, mud and sand on the ground, and send the sewage containing the above debris back to the domestic waste transfer station for treatment.

[0003] In the related technology, road sweeping wastewater and leachate are combined for treatment. For the treatment of road sweeping wastewater, branches and leaves are generally removed through the grille before entering the sedimentation tank. The precipitated sand and gravel are pumped to the diaphragm filter press for filtration. During the transportation and filtration process, the large pieces of sand and gravel in the road sweeping wastewater and the iron nails and wires on the road may get stuck in the delivery pump and burn the motor, or damage the diaphragm and partition, causing damage to the filter press equipment. In addition, the amount of road sweeping wastewater generated is more than 6 times the amount of leachate, and the concentration of organic pollutants in road sweeping wastewater is very low. After mixing with the leachate, the treatment burden of the membrane bioreactor is increased, thereby increasing the maintenance and replacement costs. Utility Model Content

[0004] The utility model aims to solve one of the technical problems in the related art at least to a certain extent. To this end, the embodiment of the utility model provides a treatment system for road sweeping wastewater and leachate, which classifies and treats wastewater, thereby reducing maintenance and use costs.

[0005] The road cleaning wastewater and leachate treatment system of the utility model embodiment includes:

[0006] a first sewage tank and a second sewage tank, wherein the first sewage tank is used to receive road sweeping wastewater, and the second sewage tank is used to receive leachate;

[0007] a first treatment component, the first treatment component comprising a screening area and a dosing area, the screening area being connected to the first sewage pool to screen out some impurities in the road sweeping wastewater, and the dosing area being connected to the screening area to remove suspended impurities in the road sweeping wastewater and then discharge it;

[0008] The second treatment component includes a regulating area, an acidification and sewage discharge area and a membrane biological reaction area. The regulating area is connected to the second sewage tank to screen out impurities in the leachate and adjust the water quality. The acidification and sewage discharge area includes a hydrolysis and acidification tank and a sludge tank. The hydrolysis and acidification tank is connected to the regulating area to convert organic matter in the leachate into soluble organic matter and gas. The sludge tank is used to store sludge discharged from the hydrolysis and acidification tank. The membrane biological reaction zone is connected to the hydrolysis and acidification tank to remove organic matter and suspended solids in the leachate discharged from the hydrolysis and acidification tank, and pass the separated sludge into the sludge tank to discharge the remaining wastewater.

[0009] The road sweeping wastewater and leachate treatment system of the utility model embodiment treats the road sweeping wastewater and leachate separately, thereby reducing the scale of leachate treatment, reducing the investment in leachate treatment, and reducing the maintenance and use costs of subsequent equipment.

[0010] In some embodiments, the acidification sewage discharge area also includes a dehydration component, which is connected to the sludge tank for dehydrating and discharging the sludge discharged from the sludge tank. The dehydration component includes a circulating water outlet, which is connected to the adjustment area for passing the water from which the sludge is removed into the adjustment area.

[0011] In some embodiments, the adjustment zone includes a slag removal pretreatment tank and an adjustment tank. The slag removal pretreatment tank is connected to the second sewage tank to remove impurities in the leachate discharged from the second sewage tank. The adjustment tank is connected to the slag removal pretreatment tank and the hydrolysis acidification tank to adjust the water quality of the leachate removed from impurities and pass the wastewater after water quality adjustment into the hydrolysis acidification tank.

[0012] In some embodiments, the membrane biological reaction zone includes an anoxic tank, an aerobic tank and an ultrafiltration tank connected in sequence, the anoxic tank is connected to the hydrolysis acidification tank, the aerobic tank has an air inlet and a sludge outlet, the sludge outlet is connected to the sludge tank, and the ultrafiltration tank is used to discharge wastewater to remove organic matter and suspended solids.

[0013] In some embodiments, the road sweeping wastewater and leachate treatment system of the utility model embodiment also includes a blower, and the blower includes an air outlet, and the air outlet is connected to the air inlet for supplying air to the aerobic pool.

[0014] In some embodiments, the screening area includes a screen pool, a hydraulic screening pool and a cyclone grit chamber connected in sequence, the screen pool is connected to the first sewage pool to screen out impurities in the road cleaning wastewater discharged from the first sewage pool for the first time, the hydraulic screening pool is used to screen out impurities in the road cleaning wastewater discharged from the screen pool for the second time, and the cyclone grit chamber is connected to the dosing area to pass the wastewater after the impurities are screened out for the third time into the dosing area.

[0015] In some embodiments, the screening area further includes a buffer pool, which is arranged between the screen pool and the hydraulic screening pool, and / or between the hydraulic screening pool and the cyclone sand settling pool.

[0016] In some embodiments, the screening area also includes a membrane filter press, which is connected to the cyclone sand settling tank to separate the wastewater discharged from the cyclone sand settling tank, discharge the separated silt, and pass the separated wastewater into the dosing area.

[0017] In some embodiments, the dosing area includes a high-density tank and a dosing device. The high-density tank is connected to the cyclone grit tank to be used for sedimentation and separation of wastewater discharged from the cyclone grit tank and the diaphragm filter press. The dosing device is connected to the high-density tank to add water treatment agent to the high-density tank.

[0018] In some embodiments, the high-density tank includes a discharge port and a slag discharge port, the discharge port is used to discharge the wastewater separated by the high-density tank, the slag discharge port is connected to the sludge tank, and the sludge discharge port is used to pass the sludge separated by the high-density tank into the sludge tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of a system for treating road sweeping wastewater and leachate according to an embodiment of the utility model.

[0020] Reference numerals:

[0021] 11. The first sewage pool, 12. The second sewage pool,

[0022] 2. First treatment component, 21. Screening area, 211. Screen pool, 212. Hydraulic screening pool, 213. Cyclone sand settling pool, 214. Buffer pool, 215. Diaphragm filter press, 22. Dosing area, 221. High density pool, 222. Dosing device,

[0023] 3. Second treatment component, 31. Adjustment area, 311. Slag removal pretreatment tank, 312. Adjustment tank, 32. Acidification sewage discharge area, 321. Hydrolysis acidification tank, 322. Sludge tank, 323. Dehydration unit, 33. Membrane biological reaction area, 331. Anoxic tank, 332. Aerobic tank, 333. Ultrafiltration tank,

[0024] 4 Blowers. DETAILED DESCRIPTION

[0025] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but cannot be understood as limiting the present invention.

[0026] like Figure 1 As shown, the treatment system for road sweeping wastewater and leachate of the embodiment of the utility model includes: a first sewage tank 11, a second sewage tank 12, a first treatment component 2 and a second treatment component 3.

[0027] The first sewage pool 11 is used to receive road sweeping wastewater, and the second sewage pool 12 is used to receive leachate. The first treatment component 2 includes a screening area 21 and a dosing area 22. The screening area 21 is connected to the first sewage pool 11 to screen out some impurities in the road sweeping wastewater, and the dosing area 22 is connected to the screening area 21 to remove suspended impurities in the road sweeping wastewater and then discharge it. The second treatment component 3 includes a regulating area 31, an acidification and sewage discharge area 32 and a membrane biological reaction area 33. The regulating area 31 is connected to the second sewage pool 12 to screen out impurities in the leachate and adjust the water quality. The acidification and sewage discharge area 32 includes a hydrolysis and acidification tank 321 and a sludge tank 322. The hydrolysis and acidification tank 321 is connected to the regulating area 31 to convert organic matter in the leachate into soluble organic matter and gas. The sludge tank 322 is used to store sludge discharged from the hydrolysis and acidification tank 321. The membrane biological reaction area 33 is connected to the hydrolysis and acidification tank 321 to remove organic matter and suspended solids in the leachate discharged from the hydrolysis and acidification tank 321, and pass the separated sludge into the sludge tank 322 to discharge the remaining wastewater.

[0028] Specifically, Figure 1 As shown, the road sweeping wastewater is processed in the first sewage pool 11, the screening area 21 and the dosing area 22 in sequence, wherein the first sewage pool 11 is used to store and control the flow of the road sweeping wastewater flowing to the screening area 21 to avoid clogging of the screening area 21 during the impurity screening process. The leachate is processed in the second sewage pool 12, the adjustment area 31, the acidification tank, the membrane biological reaction area 33 and the sludge tank 322 in sequence. It should be noted that the storage and treatment pools can be connected by a conveying pipeline, and a gate or valve for controlling the liquid flow rate can be set on each conveying pipeline. Preferably, the valve or gate can be remotely controlled by a remote device (such as a computer, etc.).

[0029] It is understandable that road sweeping wastewater generally contains large pieces of material such as branches, leaves, stones, and suspended matter such as mud and sand, and according to daily cleaning requirements, the amount of road sweeping wastewater transported to the garbage disposal station is greater than the amount of leachate. Leachate refers to wastewater produced by a garbage dump, which contains high concentrations of organic matter, ammonia nitrogen and other pollutants. After screening out impurities, the treatment of leachate generally requires biochemical treatment and membrane treatment to remove organic pollutants such as COD and ammonia nitrogen in the mixed wastewater to meet the discharge standards. Therefore, the mixed treatment of road sweeping wastewater and leachate requires a large amount of mixed wastewater to be treated to the same standard, which increases the processing capacity of equipment for treating organic matter, ammonia nitrogen and other pollutants, resulting in increased equipment maintenance and failure rates.

[0030] Therefore, the road sweeping wastewater and leachate treatment system of the utility model embodiment treats the road sweeping wastewater and leachate separately, reduces the scale of leachate treatment, reduces the investment in leachate treatment, and reduces the maintenance and use costs of subsequent equipment.

[0031] In some embodiments, Figure 1 As shown, the acidification sewage discharge area 32 also includes a dehydration component 323, which is connected to the sludge tank 322 for dehydrating and discharging the sludge discharged from the sludge tank 322. The dehydration component 323 includes a circulating water outlet, which is connected to the regulating area 31 for passing the water from which the sludge is removed into the regulating area 31.

[0032] It is understandable that the dehydration part 323 can be a device for dehydration, such as a screw-type sludge dehydrator. During the operation of the treatment system, the sludge discharged from the hydrolysis acidification tank 321 collected by the sludge tank 322 gradually increases, and the collected sludge also carries some water, and direct discharge and treatment are cumbersome and costly. Therefore, the sludge discharged from the sludge tank 322 can be dehydrated by the dehydration part 323, and the dehydrated sludge can be transported to a garbage incineration plant or a sanitary landfill, and the dehydrated water can be passed into the regulation area 31 through the circulating water intake to achieve the reuse of water resources.

[0033] That is to say, the dehydration component 323 is used to dehydrate the sludge discharged from the sludge tank 322, thereby reducing the amount of sludge and recycling it, reducing the disposal cost of waste, and at the same time, the removed water is passed into the adjustment area 31 through the circulating water outlet, realizing the recycling of water and reducing the consumption of fresh water.

[0034] In some embodiments, Figure 1As shown, the adjustment area 31 includes a slag removal pretreatment tank 311 and an adjustment tank 312. The slag removal pretreatment tank 311 is connected to the second sewage tank 12 to remove impurities in the leachate discharged from the second sewage tank 12. The adjustment tank 312 is connected to the slag removal pretreatment tank 311 and the hydrolysis acidification tank 321 to adjust the water quality of the leachate after impurities are removed and pass the wastewater after water quality adjustment into the hydrolysis acidification tank 321.

[0035] It is understandable that the leachate contains a large amount of solid particles, impurities and sediments, and first passes through the deslagging pretreatment tank 311 for a deslagging pretreatment process. In the deslagging pretreatment, large solid particles and impurities in the leachate can be removed through equipment such as grids and grid filters, thereby reducing the impact on the physical properties of subsequent treatment equipment and improving the system operation efficiency. The function of the regulating tank 312 is to balance and regulate the flow, load and water quality of the leachate to adapt it to the requirements of the subsequent treatment process. In the regulating tank 312, the leachate undergoes clarification, mixing, dilution and other processes to achieve the regulation of water quality and water quantity.

[0036] In some embodiments, Figure 1 As shown, the membrane biological reaction zone 33 includes an anoxic tank 331, an aerobic tank 332 and an ultrafiltration tank 333 which are connected in sequence. The anoxic tank 331 is connected to the hydrolysis acidification tank 321. The aerobic tank 332 has an air inlet and a sludge outlet, and the sludge outlet is connected to the sludge tank 322. The ultrafiltration tank 333 is used to discharge wastewater to remove organic matter and suspended solids.

[0037] Specifically, Figure 1 As shown, the main function of the anoxic pool 331 is to provide an oxygen-free environment so that denitrifying bacteria can reduce nitrate nitrogen and nitrite nitrogen to nitrogen gas, a process called denitrification. Denitrification is a key step in the denitrification process, which can effectively reduce the nitrogen content in the water and reduce pollution to the environment. In addition, the anoxic pool 331 can also be used as a biofilm culture area, and the microorganisms in the biofilm can help adsorb and decompose organic matter in the water.

[0038] The aerobic pool 332 provides an oxygen-rich environment that is conducive to the growth and metabolic activities of aerobic microorganisms. Under aerobic conditions, microorganisms can effectively degrade organic matter in the water, including refractory organic matter and ammonia nitrogen. In addition, nitrification can also occur in the aerobic pool 332, converting ammonia nitrogen into nitrate nitrogen and nitrite nitrogen, which is an important step in the nitrogen cycle.

[0039] The ultrafiltration tank 333 is a membrane separation unit in the membrane bioreactor, which uses an ultrafiltration membrane to separate suspended solids and microorganisms in water. Optionally, the pore size of the ultrafiltration membrane is between 0.01 and 10 microns, so as to effectively remove most organic matter, some nutrients and microorganisms, thereby improving the quality and stability of the effluent. In addition, the ultrafiltration process can also concentrate sludge, reducing the amount of sludge to be processed and the cost of disposal.

[0040] It can be understood that the membrane bioreactor zone 33 is a PAM membrane bioreactor zone 33. PAM (i.e., polyacrylamide) has a polymer chain structure after being dissolved in water, which can not only promote the combination of suspended particles in the water to form larger floccules, which helps to accelerate the flocculation and sedimentation process, but also PAM can disperse particles in the water, prevent the aggregation and precipitation of particles, and keep the water clean. The PAM solution can also reduce the surface tension of water, which is conducive to the sedimentation and separation of suspended particles in the water. Therefore, during the operation of the treatment system, after PAM is added, the separation effect of particulate matter in the leachate can be improved, and the efficiency of solid-liquid separation can be improved.

[0041] Preferably, the road sweeping wastewater and leachate treatment system of the embodiment of the utility model further includes a blower 4 , and the blower 4 includes an air outlet connected to the air inlet for introducing air into the aerobic tank 332 .

[0042] It is understandable that the blower 4 injects air into the aerobic tank 332 through the air inlet, thereby increasing the dissolved oxygen concentration in the leachate wastewater. In addition, injecting air into the aerobic tank 332 using the blower 4 can also promote biodegradation, accelerate sludge settling, and reduce the generation of odor and harmful gases, thereby increasing the processing capacity of the aerobic tank 332.

[0043] In some embodiments, Figure 1 As shown, the screening area 21 includes a screen pool 211, a hydraulic screening pool and a cyclone sand settling tank 213 which are connected in sequence. The screen pool 211 is connected to the first sewage pool 11 to screen out impurities in the road cleaning wastewater discharged from the first sewage pool 11 for the first time. The hydraulic screening pool is used to screen out impurities in the road cleaning wastewater discharged from the screen pool 211 for the second time. The cyclone sand settling tank is connected to the dosing area 22 to pass the wastewater after the impurities are screened out for the third time into the dosing area 22.

[0044] It is understandable that the screen pool 211 intercepts larger particles (such as branches, leaves, etc.) in the road cleaning wastewater through a fixed screen or a rotating screen plate. When the sewage flows through the screen, smaller particles (such as gravel, stones, etc.) and liquid pass through the screen, while larger particles are intercepted on the screen, thereby achieving the first screening function to effectively remove larger particle impurities in the road cleaning wastewater, provide guarantee for subsequent treatment, and reduce subsequent equipment wear.

[0045] The hydraulic screening tank relies on hydraulic action to achieve solid-liquid separation. The water flow with different flow rates in the tank causes heavy particles (such as gravel, stones, etc.) to settle due to inertia, while light particles are carried away by the water flow. The design inside the hydraulic screening tank 212 usually helps to increase the retention time of particles, improve the separation effect, further achieve the second screening function, and improve water quality.

[0046] The cyclone sedimentation tank 213 mainly relies on centrifugal force to achieve solid-liquid separation. When the sewage discharged by the hydraulic screening enters the cyclone sedimentation tank 213, in the rotating flow field, the particles with a larger specific gravity (such as silt, etc.) move to the tank wall and settle under the action of centrifugal force, while the light particles are thrown to the center and flow out. In other words, the cyclone sedimentation tank 213 can be used to screen out the silt in the wastewater, and the remaining wastewater can be passed into the dosing area 22 to adjust the water quality.

[0047] Preferably, the screening area 21 further includes a buffer pool 214 , which is disposed between the screen pool 211 and the hydraulic screening pool, and / or between the hydraulic screening pool and the cyclone sand settling pool 213 .

[0048] It is understandable that a buffer pool 214 can be set between the screen pool 211 and the hydraulic screening pool; or, a buffer pool 214 can be set between the hydraulic screening pool and the cyclone sedimentation pool 213; or, a buffer pool 214 is set between the screen pool 211 and the hydraulic screening pool and between the hydraulic screening pool and the cyclone sedimentation pool 213. In other words, the buffer pool 214 can balance the flow and pressure between the two treatment pools to avoid equipment overload or pressure instability caused by flow fluctuations. It provides a flow adjustment space for the treatment system, making the system run more smoothly. In addition, when an emergency occurs in the treatment system, such as equipment failure or maintenance, the buffer pool 214 can be used as an emergency pool to reduce the impact on the entire treatment system.

[0049] In some embodiments, Figure 1 As shown, the screening area 21 also includes a membrane filter press 215, which is connected to the cyclone sand tank to separate the wastewater discharged from the cyclone sand tank and discharge the separated silt, and pass the separated wastewater into the dosing area 22.

[0050] It is understandable that the membrane filter press 215 can effectively separate mud and water, has high processing efficiency, can process the concentrated mud discharged from the cyclone sedimentation tank 213, and discharge the separated mud. Preferably, the membrane filter press 215 has a separation outlet, which is connected to the dosing area 22 so that the separated water can be passed into the dosing area 22 so that the water resources can be reused.

[0051] In some embodiments, Figure 1As shown, the dosing area 22 includes a high-density tank 221 and a dosing device 222. The high-density tank 221 is connected to the cyclone grit tank to be used for sedimentation and separation of wastewater discharged from the cyclone grit tank and the diaphragm filter press 215. The dosing device 222 is connected to the high-density tank 221 to add water treatment agent to the high-density tank 221.

[0052] It is understandable that the high-density tank 221 increases the hydrostatic pressure of the water body and increases the settling speed of suspended particles, thereby achieving more effective solid-liquid separation. The dosing device 222 can accurately control the amount and speed of the water treatment agent to ensure the treatment effect. Among them, the water treatment agent includes: flocculants, disinfectants, etc., to improve the efficiency and quality of sewage treatment. Optionally, the dosing device 222 can also be a PAM dosing device 222.

[0053] In other words, the configuration of the high-density tank 221 and the dosing device 222 optimizes the sewage treatment process, making the entire system smoother and more efficient. Through effective solid-liquid separation and precise dosing control, the overall cost of sewage treatment can be reduced. Therefore, the role of the dosing area 22 ensures further purification of the wastewater, so that the water quality in the high-density tank 221 can be directly discharged, thereby reducing the impact on the environment.

[0054] Preferably, the high-density tank 221 includes a discharge port and a slag discharge port. The discharge port is used to discharge the wastewater separated by the high-density tank 221 , and the slag discharge port is connected to the sludge tank 322 . The sludge discharge port is used to pass the sludge separated by the high-density tank 221 into the sludge tank 322 .

[0055] It is understandable that the discharge port can be connected to the municipal pipe network so that the wastewater that meets the water quality standards can be discharged into the municipal pipe network. The sediment (such as mud) settled in the high-density pool 221 can be passed into the mud tank 322 through the slag discharge port for further treatment.

[0056] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0057] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0058] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0059] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0060] In the present utility model, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0061] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are illustrative and cannot be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A road cleaning wastewater and leachate treatment system, characterized in that: include: a first sewage tank and a second sewage tank, wherein the first sewage tank is used to receive road sweeping wastewater, and the second sewage tank is used to receive leachate; a first treatment component, the first treatment component comprising a screening area and a dosing area, the screening area being connected to the first sewage pool to screen out some impurities in the road sweeping wastewater, and the dosing area being connected to the screening area to remove suspended impurities in the road sweeping wastewater and then discharge it; The second treatment component includes a regulating area, an acidification and sewage discharge area and a membrane biological reaction area. The regulating area is connected to the second sewage tank to screen out impurities in the leachate and adjust the water quality. The acidification and sewage discharge area includes a hydrolysis and acidification tank and a sludge tank. The hydrolysis and acidification tank is connected to the regulating area to convert organic matter in the leachate into soluble organic matter and gas. The sludge tank is used to store sludge discharged from the hydrolysis and acidification tank. The membrane biological reaction zone is connected to the hydrolysis and acidification tank to remove organic matter and suspended solids in the leachate discharged from the hydrolysis and acidification tank, and pass the separated sludge into the sludge tank to discharge the remaining wastewater.

2. The road cleaning wastewater and leachate treatment system according to claim 1, characterized in that: The acidification sewage discharge area also includes a dehydration component, which is connected to the sludge tank for dehydrating and discharging the sludge discharged from the sludge tank. The dehydration component includes a circulating water outlet, which is connected to the regulating area for passing the water from which the sludge is removed into the regulating area.

3. The road cleaning wastewater and leachate treatment system according to claim 2, characterized in that: The adjustment area includes a slag removal pretreatment tank and a regulating tank. The slag removal pretreatment tank is connected to the second sewage tank to remove impurities in the leachate discharged from the second sewage tank. The regulating tank is connected to the slag removal pretreatment tank and the hydrolysis acidification tank to adjust the water quality of the leachate without impurities and pass the wastewater after water quality adjustment into the hydrolysis acidification tank.

4. The road cleaning wastewater and leachate treatment system according to claim 1, characterized in that: The membrane biological reaction zone includes an anoxic tank, an aerobic tank and an ultrafiltration tank which are connected in sequence. The anoxic tank is connected to the hydrolysis acidification tank. The aerobic tank has an air inlet and a sludge outlet. The sludge outlet is connected to the sludge tank. The ultrafiltration tank is used to discharge wastewater with organic matter and suspended solids removed.

5. The road sweeping wastewater and leachate treatment system according to claim 4, characterized in that: The device also comprises a blower, wherein the blower comprises an air outlet, and the air outlet is connected to the air inlet so as to introduce air into the aerobic pool.

6. The road sweeping wastewater and leachate treatment system according to claim 1, characterized in that: The screening area includes a screen pool, a hydraulic screening pool and a cyclone grit chamber which are connected in sequence. The screen pool is connected to the first sewage pool to screen out impurities in the road cleaning wastewater discharged from the first sewage pool for the first time. The hydraulic screening pool is used to screen out impurities in the road cleaning wastewater discharged from the screen pool for the second time. The cyclone grit chamber is connected to the dosing area to pass the wastewater after the impurities are screened out for the third time into the dosing area.

7. The road sweeping wastewater and leachate treatment system according to claim 6, characterized in that: The screening area also includes a buffer pool, which is arranged between the screen pool and the hydraulic screening pool, and / or between the hydraulic screening pool and the cyclone sand settling pool.

8. The road sweeping wastewater and leachate treatment system according to claim 7, characterized in that: The screening area also includes a membrane filter press, which is connected to the cyclone sand settling tank to separate the wastewater discharged from the cyclone sand settling tank, discharge the separated silt, and pass the separated wastewater into the dosing area.

9. The road sweeping wastewater and leachate treatment system according to claim 8, characterized in that: The dosing area includes a high-density tank and a dosing device. The high-density tank is connected to the cyclone sand settling tank to settle and separate the wastewater discharged from the cyclone sand settling tank and the diaphragm filter press. The dosing device is connected to the high-density tank to add water treatment agent to the high-density tank.

10. The road sweeping wastewater and leachate treatment system according to claim 9, characterized in that: The high-density tank comprises a discharge port and a slag discharge port, wherein the discharge port is used to discharge the wastewater separated by the high-density tank, and the slag discharge port is connected to the sludge tank, and the sludge discharge port is used to pass the sludge separated by the high-density tank into the sludge tank.

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