Novel adjustable sewage treatment system

Abstract

The utility model provides a novel adjustable and controllable sewage treatment system which comprises an oil separation tank, a collection and regulation tank, an air floatation tank device, a hydrolysis acidification tank and an integrated biochemical system which are sequentially connected in a circulating manner, and further comprises a coagulative precipitation tank and an quartz sand filter, the sewage treated by the collecting and regulating tank flows into a coagulative precipitation tank so as to be subjected to floc decontamination treatment, and the sewage treated by the coagulative precipitation tank is subjected to aeration oil removal treatment by an air floatation tank device; the sewage treated by the air floatation tank device is subjected to organic matter hydrolytic acidification decomposition treatment on clear liquid at the upper part of the air floatation tank device through a hydrolytic acidification tank, and COD (Chemical Oxygen Demand), BOD (Biochemical Oxygen Demand) and ammonia nitrogen compounds in the sewage treated by the air floatation tank device and / or the hydrolytic acidification tank are removed through an integrated biochemical system; and the sewage treated by the integrated biochemical system passes through an quartz sand filter to filter flocs containing pollutants. According to the utility model, the purification quality and the purification efficiency of sewage containing suspended particulate matters and waste oil are further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment equipment, in particular to a novel adjustable sewage treatment system. Background Art

[0002] At present, the wastewater of dock yards in many southern ports mainly treats surface runoff rainwater formed by rainfall in open-air bulk yards, yard watering and car washing wastewater, etc. The main pollutants of the wastewater are suspended particulate matter and oil pollution. At present, many head yards use the "flocculation + sedimentation + flotation" process to meet the emission requirements. However, since many dock yard cargoes are mixed with grain goods such as corn and soybeans in addition to the original petroleum coke, gypsum and slag powder, a very small amount of such goods will inevitably fall into the corners of the site and enter the garbage transfer station during transportation, and ferment under the immersion of rainwater or spray water to produce high-concentration organic wastewater, which is mainly composed of COD, BOD and ammonia nitrogen pollutants. This sewage is directly discharged into the original sewage treatment facilities, resulting in an increase in the organic load of the original sewage treatment facilities. The effluent water quality relying solely on the original treatment process of "flocculation + sedimentation + flotation" cannot meet the reused water standard of "Urban Wastewater Recycling and Urban Miscellaneous Water Quality" GBT18920-2020 and the "Water Pollutant Emission Limits" (DB4426-2001, Guangdong Provincial Local Emission Standards) The second period one level standard requirements.

[0003] At the same time, due to the obvious distinction between rainy season and non-rainy season in the southern region, the amount of water that needs to be treated during the non-rainy season is very small, while the amount of water that needs to be treated during the rainy season is very large. Therefore, in order to ensure that the sewage project of the southern port can meet the treatment requirements of high-concentration organic sewage on weekdays and the treatment requirements when the water volume increases during the rainy season, an innovative treatment process is needed to meet the special needs of the sewage treatment project of the southern port. For example, an innovative process system that can be controlled in sections. Utility Model Content

[0004] In view of this, it is necessary to propose a new adjustable sewage treatment system to address the above problems, so as to overcome some shortcomings of the above background technology and solve the technical problem of how to further improve the purification quality and purification efficiency of sewage containing suspended particulate matter and waste oil.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The utility model provides a novel adjustable sewage treatment system, which is used for treating sewage containing suspended particles and waste oil. The novel adjustable sewage treatment system comprises a grease trap, a collecting and regulating tank, a flotation tank device, a hydrolysis and acidification tank and an integrated biochemical system which are connected in sequence. After the sewage is filtered by a grille, it is pumped into the grease trap to remove the dirty oil, and then the water volume and water quality are adjusted by the collecting and regulating tank. The novel adjustable sewage treatment system also comprises a coagulation and sedimentation tank and a British sand filter. The sewage treated by the collecting and regulating tank flows into the coagulation and sedimentation tank to perform flocculent decontamination treatment, the sewage treated by the coagulation and sedimentation tank is then subjected to aeration and oil removal treatment by the flotation tank device, the sewage treated by the flotation tank device is then subjected to organic matter hydrolysis and acidification decomposition treatment on the clear liquid on the upper part of the flotation tank device by the hydrolysis and acidification tank, the sewage treated by the flotation tank device and / or the hydrolysis and acidification tank is subjected to the integrated biochemical system to remove COD, BOD and ammonia nitrogen compounds, and the sewage treated by the integrated biochemical system is then subjected to the British sand filter to filter the floccules containing pollutants.

[0007] Furthermore, the novel adjustable sewage treatment system also includes an ozone catalytic oxidation tower; the sewage treated by the English sand filter is then treated by aeration and ozone in the ozone catalytic oxidation tower.

[0008] Furthermore, the novel adjustable sewage treatment system also includes a rainwater buffer pool; the water treated by the ozone catalytic oxidation tower flows into the rainwater buffer pool.

[0009] Furthermore, the novel adjustable sewage treatment system also includes a fiber bundle filter; the water body treated by the English sand filter is further treated by the fiber bundle filter.

[0010] Furthermore, the novel adjustable sewage treatment system also includes a rainwater buffer pool; the water treated by the fiber bundle filter flows into the rainwater buffer pool.

[0011] Furthermore, the novel adjustable sewage treatment system also includes a fiber bundle filter; the water body treated by the ozone catalytic oxidation tower is further treated by the fiber bundle filter.

[0012] Furthermore, the novel adjustable sewage treatment system also includes a rainwater buffer pool; the water treated by the fiber bundle filter flows into the rainwater buffer pool.

[0013] Further, the integrated biochemical system includes a plurality of anoxic tanks and a plurality of aerobic tanks, and the integrated biochemical system is provided with a sewage inlet and an outlet for discharging the secondary water body after primary treatment;

[0014] An alternative switch connection channel is provided between the collection and adjustment tank and the flotation tank device.

[0015] Furthermore, the novel adjustable sewage treatment system also includes a dehydrator; the dehydrator is used to dehydrate the sludge produced by the electric flocculation in the coagulation sedimentation tank.

[0016] Furthermore, the coagulation sedimentation tank also includes an electric flocculation device; the electric flocculation device is used to perform electric flocculation treatment on floc-forming additives and sewage added into the coagulation sedimentation tank.

[0017] The beneficial effects of the utility model are:

[0018] The utility model further improves the purification quality and purification efficiency of sewage containing suspended particles and waste oil, so that the sewage containing suspended particles and waste oil flowing out of the original dock yard meets the high national standards after treatment. It can also be treated according to the water quality and water volume of rainy season and non-rainy season sewage, and the system can be switched freely at will, making it a truly adjustable sewage treatment system, and greatly reducing the overall operating costs. The utility model also has the following advantages: the sewage treatment has a high degree of automation, greatly reducing the labor intensity of employees, and reducing human intervention in the sewage treatment process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural principle diagram of a novel adjustable sewage treatment system in Example 1 of the utility model;

[0020] Figure 2 This is a structural principle diagram of a novel adjustable sewage treatment system in Example 2 of the utility model;

[0021] Figure 3 This is a structural principle diagram of a novel adjustable sewage treatment system in Example 3 of the utility model;

[0022] Figure 4 This is a structural principle diagram of a novel adjustable sewage treatment system in Example 4 of the utility model;

[0023] Figure 5 This is a structural principle diagram of a novel adjustable sewage treatment system of the utility model after the optimized design of Example 1;

[0024] Figure 6 This is a structural principle diagram of a novel adjustable sewage treatment system in Example 5 of the utility model;

[0025] Description of reference numerals:

[0026] Grease trap 1; collection and regulation tank 2; coagulation sedimentation tank 3; flotation tank device 4; hydrolysis acidification tank 5; integrated biochemical system 6; English sand filter 7; ozone catalytic oxidation tower 8; fiber bundle filter 9; rainwater buffer tank 10; dehydrator 31; electric flocculation equipment 32. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be further clearly and completely described below in combination with the embodiments of the utility model. It should be noted that the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0028] It should be understood that the directions or positional relationships indicated by terms such as "upper", "lower", "front", "back", "left", and "right" are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present invention.

[0029] The terms "first", "second", "third", "fourth", etc. 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 definition of "first", "second", "third", "fourth" features may explicitly or implicitly include one or more of the features.

[0030] Example 1

[0031] like Figure 1 As shown:

[0032] This embodiment proposes a novel adjustable sewage treatment system for treating sewage containing suspended particulate matter and waste oil. The novel adjustable sewage treatment system comprises a grease trap 1, a collection and regulation tank 2, an air flotation tank 4, a hydrolysis acidification tank 5 and an integrated biochemical system 6 which are connected in sequence. After the sewage is filtered through a grid, it is pumped into the grease trap 1 to remove the dirty oil, and then the water volume and water quality are adjusted through the collection and regulation tank 2. The novel adjustable sewage treatment system also comprises a coagulation sedimentation tank 3 and a British sand filter 7. The sewage treated in the collection and regulation tank 2 flows into the grease trap 1. The sewage is sent into the coagulation sedimentation tank 3 for flocculent decontamination treatment. The sewage treated in the coagulation sedimentation tank 3 is then treated by aeration and oil removal in the flotation tank 4. The sewage treated in the flotation tank 4 is then treated by hydrolysis and acidification tank 5 for decomposition of organic matter in the clear liquid on the top of the flotation tank 4. The sewage treated in the flotation tank 4 and / or the hydrolysis and acidification tank 5 is treated by the integrated biochemical system 6 to remove COD, BOD and ammonia nitrogen compounds. The sewage treated in the integrated biochemical system 6 is then filtered by the English sand filter 7 to filter the flocs containing pollutants.

[0033] Optimally, the integrated biochemical system 6 includes several anoxic pools and several aerobic pools, and the integrated biochemical system 6 is provided with a sewage inlet and an outlet for discharging secondary water after primary treatment; the integrated biochemical system 6 is one of the universal or standardized integrated biochemical systems.

[0034] Optimally, an alternative switch connection channel is provided between the collection and adjustment tank 2 and the flotation tank device 4 .

[0035] Optimally, such as Figure 5 As shown, the novel adjustable sewage treatment system further includes a dehydrator 31 ; the dehydrator 31 is used to dehydrate the sludge generated by the electric flocculation in the coagulation sedimentation tank 3 .

[0036] Optimally, such as Figure 5 As shown, the coagulation sedimentation tank 3 further includes an electric flocculation device 32 ; the electric flocculation device 32 is used to perform electric flocculation treatment on the floc-forming additives and sewage added into the coagulation sedimentation tank 3 .

[0037] Example 2

[0038] Embodiment 2 is further optimized based on any technical solution of Embodiment 1;

[0039] like Figure 2 As shown:

[0040] The novel controllable sewage treatment system further comprises an ozone catalytic oxidation tower 8; the sewage treated by the English sand filter 7 is then treated by aeration and ozone in the ozone catalytic oxidation tower 8.

[0041] Optimally, the novel adjustable sewage treatment system further includes a rainwater buffer pool 10 ; the water treated by the ozone catalytic oxidation tower 8 flows into the rainwater buffer pool 10 .

[0042] Example 3

[0043] Embodiment 3 is further optimized based on any technical solution of Embodiment 1;

[0044] like Figure 3 As shown:

[0045] The novel adjustable sewage treatment system further comprises a fiber bundle filter 9 ; the water body treated by the English sand filter 7 is further treated by the fiber bundle filter 9 .

[0046] Optimally, the novel adjustable sewage treatment system further includes a rainwater buffer pool 10 ; the water treated by the fiber bundle filter 9 flows into the rainwater buffer pool 10 .

[0047] Example 4

[0048] Embodiment 4 is further optimized based on any technical solution of Embodiment 2;

[0049] like Figure 4 As shown:

[0050] The novel adjustable sewage treatment system further comprises a fiber bundle filter 9 ; the water body treated by the ozone catalytic oxidation tower 8 is further treated by the fiber bundle filter 9 .

[0051] Optimally, the novel adjustable sewage treatment system further includes a rainwater buffer pool 10 ; the water treated by the fiber bundle filter 9 flows into the rainwater buffer pool 10 .

[0052] Example 5

[0053] like Figure 6 As shown:

[0054] Example 5 proposes a new controllable sewage treatment system that can achieve any mode switching of Examples 1-4 through a fluid channel including a controllable switch valve arranged in the middle.

[0055] Specifically, during the non-rainy season (small water volume, high-concentration organic wastewater), the raw water first enters the grid water collection well, and then is pumped into the grease trap 1 through a lifting pump to remove most of the grease. After the wastewater is degreased, it enters the collection and adjustment tank 2 for water volume and water quality adjustment. The regulated wastewater enters the coagulation sedimentation tank 3 through a pump. After adding PAM / PAC / alkali solution to the coagulation sedimentation tank 3, flocs are formed to absorb suspended matter and chromaticity in the water. The wastewater from the coagulation sedimentation tank 3 enters the flotation tank device 4. The flotation tank device 4 further removes the residual grease in the water through the ultrafine bubbles generated by the flotation system. The clear liquid on the top of the flotation tank enters the hydrolysis acidification tank 5. The hydrolysis acidification tank 5 can convert large molecular organic matter into small molecular organic matter, which is beneficial to the next step of the integrated biochemical system 6 deep treatment. After the integrated biochemical treatment, the sewage completely removes most of the COD, BOD and ammonia nitrogen. Then, after the sand filtration system (i.e., the English sand filter 7) removes the remaining suspended matter, the effluent can meet the standards of urban miscellaneous drainage. Finally, the purpose of reuse is achieved; during the rainy season, due to the sudden increase in water volume (large water volume, wastewater with reduced pollutant concentration after being diluted by rainwater), the treatment system in the non-rainy season (hydrolysis acidification tank 5, integrated biochemical system 6, English sand filter 7) can no longer meet the treatment capacity after the sudden increase in water volume. The raw water first enters the grid water collection well, and then is pumped into the grease trap 1 through a lifting pump to remove most of the grease. After oil removal, the wastewater enters the collection and adjustment tank 2 for water volume and water quality adjustment. The regulated wastewater enters the coagulation sedimentation tank 3 through a pump. After adding PAM / PAC / alkali solution to the coagulation sedimentation tank 3, flocs are formed to absorb suspended matter and chromaticity in the water. The wastewater from the coagulation sedimentation tank 3 enters the flotation tank. The flotation tank further removes the residual grease in the water through the ultrafine bubbles generated by the flotation system. At this time, due to the dilution of pollutants by heavy rain, the main COD pollutants in the effluent after the "flocculation + sedimentation + flotation" process exist in the form of SS, and ammonia nitrogen exists in a dissolved state. Subsequently, by increasing the depth combination of electro-flocculation + ozone catalytic oxidation tower 8 + high-efficiency fiber bundle filter 9 in series, the effluent can be stably up to standard without the need for complete treatment by the biochemical system.After the electro-flocculation treatment, the suspended solids (SS) in the water are below 5 mg / l. After the oxidation treatment in the ozone catalytic oxidation tower 8, not only can the COD be further reduced, but also the ammonia nitrogen in the water can be oxidized into nitrogen (N2) and water (H2O) under the action of ozone catalytic oxidation so that the effluent meets the discharge standards. In order to make the effluent more stable, a high-efficiency fiber bundle filter 9 is connected in series. After the treatment of the high-efficiency fiber bundle filter 9, the suspended solids (SS) in the effluent can be reduced to below 1 mg / l. This process section can make the wastewater stable and meet the standards without biochemical treatment. At the same time, in the system An initial rainwater buffer pool 10 is added to the back end of the system. Even if the water volume of a super-heavy rainstorm exceeds the system processing capacity of the electro-flocculation + ozone catalytic oxidation tower 8 + high-efficiency fiber bundle filter 9 and the index exceeds the standard and cannot be discharged, the rainwater can be temporarily stored in the subsequent initial rainwater buffer pool. After the super-heavy rainstorm is over, it can be pumped into the integrated deep treatment system for treatment (i.e., the hydrolysis acidification tank 5, the integrated biochemical system 6, and the English sand filter 7). According to calculations, the treatment can be basically completed within 30 hours to treat all the substandard wastewater temporarily stored in the initial rainwater buffer pool. The sludge produced by the integrated biochemical system 6, the flotation tank device 4, the coagulation sedimentation tank 3 and / or the electric flocculation enters the sludge tank for concentration, and the concentrated sludge passes through the dewatering machine 31 to form a mud cake and is finally transported out for treatment; the preferred method of this scheme is to add a hydrolysis acidification tank 5, an integrated biochemical system 6, and a British sand filter 7 on the basis of the original "flocculation + sedimentation + flotation" process to reduce the high-concentration sewage COD2000mg / L (port sewage experience value) to COD80mg / L or less when the water volume is low, so as to achieve the purpose of recycling. Water use standards; at the same time, when the water volume suddenly increases during heavy rain, the low-concentration sewage COD200mg / L (port sewage experience value) diluted by rainwater will be treated by the additional electro-flocculation, ozone catalytic oxidation tower 8, high-efficiency fiber bundle filter 9, and initial rainwater buffer pool 10 system to reduce the COD to below 80mg / L and meet the reuse water standard; the greatest innovation of this solution is that the treatment system can be switched through the automatic control system according to the changes in water volume and water quality, so as to cope with both changes in water volume and water quality to ensure that the system is stable and meets the standards.

[0056] Specifically, the preferred method of this scheme is that the system increases two systems, namely a high-concentration sewage treatment system and a low-concentration sewage treatment system; since the freight of the high-concentration sewage treatment system is relatively high, if the hydrolysis acidification tank 5, the integrated biochemical system 6, and the English sand filter 7 are also used to treat the low-concentration sewage, the treatment cost will be greatly reduced.

[0057] Specifically, the present solution innovatively adopts the method that the low-concentration sewage generated during heavy rain can be freely switched to the low-concentration sewage treatment system, namely the electrocoagulation equipment 32, the ozone catalytic oxidation tower 8, the fiber bundle filter 9, and the rainwater buffer pool 10 system. The process can decompose and reduce the pollutants during heavy rain only through electrochemistry, ozone oxidation, and filtration, and meet the requirements of standard discharge without going through the sewage treatment system of the hydrolysis acidification tank 5, the integrated biochemical system 6, and the English sand filter 7 with relatively high operating costs, thereby reducing the treatment cost of the entire terminal yard sewage treatment system.

[0058] Specifically, the preferred method of this scheme is to select the method of connecting the electric flocculation equipment 32, the ozone catalytic oxidation tower 8 and the fiber bundle filter 9 in series, which not only ensures that the COD meets the standard but also the ammonia nitrogen meets the standard. At the same time, after the fiber bundle filter 9 is connected in series, the suspended solids in the effluent can be reduced to below 1 mg / l, ensuring better treatment.

[0059] In order to better understand the principle of the present invention, the following description is made:

[0060] 1). Electrocoagulation technology is a sewage treatment method that breaks the temperature state of suspended matter, emulsified or dissolved pollutants in water by passing electric current through water. Compared with traditional chemical flocculation, electronic flocculation does not require the addition of chemicals, has low operating and maintenance costs, and has stable results. It will not cause secondary pollution of water quality and sediments. It is an efficient and environmentally friendly water treatment technology. The working principle of the electrocoagulation equipment 32 is: connect direct current to multiple sets of parallel plates to generate an electric field between the plates, so that the water to be treated flows into the gaps between the plates. At this time, the energized plates will undergo an electrochemical reaction, dissolving Al3+ or Fe2+ ions and hydrolyzing them in water to produce a flocculation reaction. In this process, other effects such as electrical flotation and oxidation-reduction occur at the same time. As a result of these effects, soluble, colloidal and suspended pollutants in water are effectively converted and removed. The reaction principle is as follows:

[0061] Anode: Fe-2e→Fe2+

[0062] Anode: 2OH-→2[O]+2e→02↑+2e

[0063] Cathode: 2H++2e→2[H]→H2↑

[0064] In the electrolysis process, aluminum or iron is used as the electrode. When the current is passed, the anode material will dissolve in the electrolysis process to form metal cations such as Fe2+ and Al3+. After a series of hydrolysis, polymerization and oxidation processes, a highly active adsorption group is formed, forming a colloidal substance with flocculation effect in the solution. These substances can promote the flocculation and precipitation of colloidal impurities in the water, thereby achieving the removal of pollutants.

[0065] 2). Ozone catalytic oxidation technology is a highly efficient wastewater deep treatment technology and has been a hot application topic in the field of wastewater treatment in recent years. Compared with ozone as a single oxidant, the ·OH formed by ozone under the action of a catalyst has a higher reaction rate with organic matter and stronger oxidizing properties, and can oxidize almost all organic matter. The catalyst can use the strong oxidizing property of ozone to directly oxidize organic matter in water into CO2 and H2O, or oxidize and decompose large molecular organic matter into small molecules, making it easier to degrade; at the same time, ozone has strong oxidizing properties and can oxidize ammonia nitrogen. The formula is as follows: 2NH3+O3=N2+3H2O;

[0066] The ozone catalytic oxidation tower 8 is a tower where ozone enters the bottom of the oxidation tower through a pipeline, passes through an aeration plate, a water distribution plate, an aeration cutting rotating plate, and an ozone catalytic filler (fluidized catalysis). During the rising process, the bubbles pass through the aeration cutting rotating plate to fully dissolve the ozone in water and enhance the oxidizing capacity of the ozone in the presence of the catalytic filler. The incoming water passes through the water distribution plate and the catalytic filler and then falls down at the top of the ozone tower, and then flows away naturally from the water outlet of the ozone tower. This reaction tower ensures sufficient time for ozone and water to mix through a gas cutting plate and an ozone catalytic filler (after water is introduced, the catalytic filler is ensured to be in a fluidized state to make the reaction more complete), making the treatment effect more thorough. The top is also equipped with an exhaust gas discharge and an overflow port to ensure that excess ozone will not remain indoors. The overflow port ensures that after the mixing tower is full of water, the water will not flow back to the ozone generator to damage the ozone generator.

[0067] Ozone catalytic oxidation tower has the following advantages:

[0068] (1) The composite porous high-strength silicon-aluminum catalyst carrier evenly carries the catalytic components that are not easy to lose, thereby improving the stability of the catalyst. The carrier is prepared using a special preparation process, with high mechanical strength and long service life;

[0069] (2) Carefully select the carrier and active components of the catalytic filler, and use transition metals, rare metals, and rare earth metals as effective catalytic components to ensure that the ozone oxidation efficiency is continuously high;

[0070] (3) Multiple catalytic components enhance the adaptability of the catalyst to different wastewaters while improving the catalytic activity.

[0071] (4) There is no loss of catalytic filler and no need for regular addition;

[0072] (5) It can catalyze the self-decomposition of ozone in water, increase the concentration of ·OH produced in water, and thus improve the ozone oxidation effect. The oxidation efficiency is 2 to 4 times higher than that of simple ozone oxidation.

[0073] (6) It can reduce the activation energy of the reaction or change the reaction process, thereby achieving deep oxidation and maximizing the removal of organic pollutants;

[0074] (7) The packing in the catalytic oxidation tower ensures a fluidized state during operation, making the reaction more complete;

[0075] (8) By adding a special aeration cutting rotating disk, the ozone cutting is made more complete and fine, ensuring that more ozone is dissolved in the water.

[0076] The above-mentioned embodiments only express several implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A novel adjustable sewage treatment system for treating sewage containing suspended particulate matter and waste oil, the novel adjustable sewage treatment system comprising a grease trap (1), a collection and regulation tank (2), an air flotation tank device (4), a hydrolysis and acidification tank (5) and an integrated biochemical system (6) which are sequentially connected, the sewage is filtered through a grid and then pumped into the grease trap (1) to remove the waste oil, and then passes through the collection and regulation tank (2) to adjust the water volume and water quality, characterized in that: The novel adjustable sewage treatment system also comprises a coagulation sedimentation tank (3) and a quartz sand filter (7); the sewage treated by the collection and regulation tank (2) flows into the coagulation sedimentation tank (3) to perform flocculent decontamination treatment; the sewage treated by the coagulation sedimentation tank (3) is then treated by aeration and oil removal in an air flotation tank device (4); the sewage treated by the air flotation tank device (4) is then treated by a hydrolysis and acidification tank (5) to hydrolyze and acidify the organic matter in the clear liquid on the top of the air flotation tank device (4); the sewage treated by the air flotation tank device (4) and / or the hydrolysis and acidification tank (5) is treated by an integrated biochemical system (6) to remove COD, BOD and ammonia nitrogen compounds; the sewage treated by the integrated biochemical system (6) is then filtered by a quartz sand filter (7) to filter the floccules containing pollutants.

2. The novel adjustable sewage treatment system according to claim 1 is characterized in that: The novel controllable sewage treatment system also includes an ozone catalytic oxidation tower (8); the sewage treated by the English sand filter (7) is then treated by aeration and ozone in the ozone catalytic oxidation tower (8).

3. The novel adjustable sewage treatment system according to claim 2 is characterized in that: The novel adjustable sewage treatment system also includes a rainwater buffer pool (10); the water treated by the ozone catalytic oxidation tower (8) flows into the rainwater buffer pool (10).

4. The novel adjustable sewage treatment system according to claim 1 is characterized in that: The novel adjustable sewage treatment system also includes a fiber bundle filter (9); the water body treated by the English sand filter (7) is further treated by the fiber bundle filter (9).

5. The novel adjustable sewage treatment system according to claim 4 is characterized in that: The novel adjustable sewage treatment system also includes a rainwater buffer pool (10); the water treated by the fiber bundle filter (9) flows into the rainwater buffer pool (10).

6. The novel adjustable sewage treatment system according to claim 2 is characterized in that: The novel adjustable sewage treatment system also includes a fiber bundle filter (9); the water body treated by the ozone catalytic oxidation tower (8) is then treated by the fiber bundle filter (9).

7. The novel adjustable sewage treatment system according to claim 6 is characterized in that: The novel adjustable sewage treatment system also includes a rainwater buffer pool (10); the water treated by the fiber bundle filter (9) flows into the rainwater buffer pool (10).

8. The novel adjustable sewage treatment system according to claim 1 is characterized in that: The integrated biochemical system (6) includes a plurality of anoxic pools and a plurality of aerobic pools. The integrated biochemical system (6) is provided with a sewage inlet and an outlet for discharging secondary water after primary treatment; An optional switch connection channel is provided between the collection and regulation tank (2) and the air flotation tank device (4).

9. The novel adjustable sewage treatment system according to claim 1 is characterized in that: The novel adjustable sewage treatment system also includes a dehydrator (31); the dehydrator (31) is used to dehydrate the sludge generated by the electric flocculation in the coagulation sedimentation tank (3).

10. The novel adjustable sewage treatment system according to claim 1 is characterized in that: The coagulation sedimentation tank (3) also includes an electric flocculation device (32); the electric flocculation device (32) is used to perform electric flocculation treatment on floc-forming additives and sewage added to the coagulation sedimentation tank (3).

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