Integrated removal device and treatment method for ship bilge oily water and ship waste gas denitrification and desulfurization waste liquid

Abstract

The invention discloses a ship bilge oily water and ship waste gas denitrification and desulfurization waste liquid integrated removal device which comprises a tank body, and the tank body comprises a solid-liquid-gas separation area and a reaction area; the solid-liquid-gas separation area comprises a gas collection chamber and a sludge settling chamber, an exhaust valve I is arranged on the gas collection chamber, and a water outlet is formed in the tank body; the reaction area is of an inner, middle and outer sleeve type structure and sequentially comprises an external oil removal and desulfurization suspended sludge reaction area, a biological membrane reaction area and an internal suspended sludge reaction area from outside to inside; an overflow weir is arranged at the upper part of the external deoiling and desulfurizing suspended sludge reaction area and is communicated with the biological membrane reaction area; a baffle is fixedly arranged on the periphery of the upper end of the external deoiling and desulfurizing suspended sludge reaction area; the lower end of the internal suspended sludge reaction zone is communicated with the lower end of the biological membrane reaction zone, and the top end of the internal suspended sludge reaction zone is communicated with the solid-liquid-gas separation zone. According to the invention, comprehensive treatment of ship exhaust gas desulfurization wastewater, ship exhaust gas denitration wastewater and ship bilge oil wastewater is realized, and the method has high environmental and economic benefits.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and in particular to an integrated removal device and treatment method for ship bilge oily sewage and ship exhaust gas denitrification and desulfurization waste liquid. Background Art

[0002] As the number of shipping vessels continues to increase worldwide, their tonnage is also becoming larger, and the environmental pollution problems caused by operations are becoming increasingly prominent.

[0003] Marine fuel oil contains high levels of sulfur, nitrogen and other substances, which makes the exhaust gas of ship diesel engines contain a large amount of sulfur oxides and nitrogen oxides. These acidic gases discharged into the atmosphere will not only cause acid rain, corrode buildings and vegetation, but also have adverse effects on the human respiratory system, especially posing great environmental risks to coastal areas. In addition, during the navigation and operation of ships, the operation of mechanical equipment in the engine room, fuel storage and use, etc. will produce oily wastewater. These oily wastewater contains a variety of petroleum hydrocarbons, emulsified oils and solid impurities. If they are discharged directly into the sea, they will cause catastrophic damage to the marine ecological environment. Therefore, relevant international and domestic regulations have imposed strict restrictions on the discharge of ship bilge oily wastewater.

[0004] At present, ship exhaust gas is mostly denitrified and desulfurized by wet scrubbing, which produces a large amount of scrubbing waste liquid, which, together with ship bilge oily water, occupies valuable ship space. Therefore, the offshore integrated treatment of ship exhaust gas scrubbing waste liquid and ship bilge oily water is imminent. Summary of the invention

[0005] The present invention provides an integrated removal device for ship bilge oily sewage and ship exhaust gas denitrification and desulfurization waste liquid to solve the above technical problems.

[0006] In order to achieve the above object, the technical solution of the present invention is:

[0007] An integrated device for removing ship bilge oily sewage and ship exhaust gas denitrification and desulfurization waste liquid comprises a tank body, the tank body comprises a solid-liquid-gas separation zone and a reaction zone; the solid-liquid-gas separation zone comprises a gas collecting chamber and a sludge settling chamber, the gas collecting chamber is provided with an exhaust valve I, and the tank body is provided with a water outlet; the reaction zone is an inner, middle and outer sleeve structure, which are, from the outside to the inside, an external deoiling and desulfurization suspended sludge reaction zone, a biofilm reaction zone and an internal suspended sludge reaction zone; an overflow weir is provided at the upper part of the external deoiling and desulfurization suspended sludge reaction zone and is connected to the biofilm reaction zone, and a baffle is fixed around the upper end of the external deoiling and desulfurization suspended sludge reaction zone; the lower end of the internal suspended sludge reaction zone is connected to the lower end of the biofilm reaction zone, and the top of the internal suspended sludge reaction zone is connected to the solid-liquid-gas separation zone.

[0008] The tank body is provided with sampling port I, sampling port III, sampling port II and liquid inlet I from top to bottom. Sampling port I and sampling port II are connected to the biofilm reaction zone, and sampling port I and sampling port II are connected to each other through a circulation pipe and a circulation pump; sampling port III and liquid inlet I are connected to the external deoiling and desulfurization suspended sludge reaction zone.

[0009] Inspection ports are respectively arranged on the tank body at the same height as the three sampling ports and the liquid inlet I, and the four inspection ports are connected to the biofilm reaction area.

[0010] On the side of the tank body opposite to the three sampling ports and the liquid inlet I, multifunctional port I, multifunctional port II, multifunctional port III and multifunctional port IV are arranged from top to bottom in sequence. Multifunctional port I and multifunctional port III are connected to the internal suspended sludge reaction zone, multifunctional port II is connected to the biofilm reaction zone, and multifunctional port IV is connected to the external oil removal and desulfurization suspended sludge reaction zone.

[0011] An exhaust valve II is arranged on the upper part of the outer sleeve of the inner, middle and outer sleeve structure, and the exhaust valve II is connected with the external deoiling and desulfurization suspended sludge reaction zone and the biofilm reaction zone.

[0012] A liquid inlet II is provided at the bottom of the tank body, which is connected to the internal suspended sludge reaction zone.

[0013] The biofilm reaction zone is filled with fillers, a temperature controller probe is inserted into the middle section of the biofilm reaction zone, and the temperature controller probe is connected to the temperature controller.

[0014] Preferably, the effective volume ratio of the external oil removal and desulfurization suspended sludge reaction zone, the biofilm reaction zone and the internal suspended sludge reaction zone is 1:4:1-1:2:1.

[0015] Preferably, the baffle includes an outer baffle and an inner baffle which are arranged opposite to each other, the outer baffle is located on the inner wall of the outer sleeve, and the inner baffle is located on the outer wall of the middle sleeve of the inner, middle and outer sleeve structure.

[0016] Preferably, the outer baffle comprises a first upper inclined plate and a first lower inclined plate; one end of the first upper inclined plate and the first lower inclined plate are connected and the included angle is α; the other ends of the first upper inclined plate and the first lower inclined plate are respectively connected to the inner wall of the outer sleeve, and the included angles of the first upper inclined plate and the first lower inclined plate with the inner wall of the outer sleeve are β;

[0017] The inner baffle includes a second upper inclined plate and a second lower inclined plate; one end of the second upper inclined plate and the second lower inclined plate are connected and the included angle is α; the other ends of the second upper inclined plate and the second lower inclined plate are respectively connected to the outer wall of the middle sleeve, and the included angle between the second upper inclined plate and the second lower inclined plate and the outer wall of the middle sleeve is β; α is an acute angle, and β is an obtuse angle.

[0018] Preferably, α is 40°-60°, β is 110°-120°, and the vertical distances between the first upper inclined plate and the first lower inclined plate and between the second upper inclined plate and the second lower inclined plate are both 10-15 cm.

[0019] Preferably, the overflow weir is arranged around the axis of the tank body.

[0020] Preferably, along the axis direction of the tank body, the distance between the upper end of the biofilm reaction zone filler and the overflow weir is 4.0-8.0 cm, and the height of the overflow weir is 1.0-2.0 cm.

[0021] Preferably, the distance between the central axis of the liquid inlet I and the bottom surface of the outer sleeve is 1.0-2.0 cm, and the diameter of the liquid inlet I1 is 1.0-3.0 cm.

[0022] Preferably, the distance between the lowermost end of the filler close to the outer sleeve and the central axis of the liquid inlet II, and the distance between the lowermost end of the filler and the upper end of the liquid inlet II are both 6.0-10.0 cm.

[0023] A treatment method using a ship bilge oily sewage and ship exhaust gas denitrification and desulfurization waste liquid integrated removal device comprises the following steps:

[0024] S1. Inoculate the anaerobic activated sludge containing sulfate-reducing bacteria into the biofilm reaction zone through the inspection port, inoculate the anaerobic activated sludge containing mixotrophic desulfurization and denitrification bacteria into the internal suspended sludge reaction zone through the multifunctional port I, and inoculate the anaerobic activated sludge containing hydrolysis and fermentation bacteria and acid-producing bacteria into the external deoiling and desulfurization suspended sludge reaction zone through the multifunctional port IV;

[0025] S2, intermittent water inlet method to acclimate the activated sludge;

[0026] The mixed wastewater of ship exhaust gas desulfurization wastewater and oily wastewater with added organic matter is introduced into the external deoiling and desulfurization suspended sludge reaction zone through the liquid inlet I; sulfide (S 2-) is introduced into the internal suspended sludge reaction zone through the liquid inlet II; the mixed wastewater flows from bottom to top through the external degreasing and desulfurization suspended sludge reaction zone, and the mud and water are separated under the action of the baffle. The mixed wastewater treated in the external degreasing and desulfurization suspended sludge reaction zone flows into the biofilm reaction zone through the overflow weir; the mixed wastewater flows from top to bottom through the filler in the biofilm reaction zone, and the gas generated by the reaction is discharged through the exhaust valve II; after the mixed wastewater flows to the bottom of the biofilm reaction zone, a part of it is transported back to the top of the biofilm reaction zone by the circulation pump for subsequent external degreasing The mixed wastewater treated in the desulfurization suspended sludge reaction zone is mixed and then flows through the filler again to react; a part of it enters the internal suspended sludge reaction zone through the bottom slit, mixes with the ship exhaust gas denitrification wastewater, and then flows through the internal suspended sludge reaction zone from bottom to top, and the reaction product and the mud-water mixture enter the solid-liquid-gas separation zone together, and the gas is discharged through the exhaust valve I, and the mud in the mud-water mixture slides back to the reaction zone through the edge of the sludge settling chamber to continue to treat the ship exhaust gas denitrification wastewater, and the supernatant containing sulfur after the mud-water separation is discharged through the outlet;

[0027] The pollutant detection is carried out on the supernatant discharged from the outlet. When the oil removal rate reaches more than 85%, the activated sludge acclimation of the external deoiling and desulfurization suspended sludge reaction zone is completed; when the sulfate (SO4 2- ) removal rate reaches more than 80%, the activated sludge acclimation in the biofilm reaction zone is completed; when the nitrate (NO 3- ) and S 2- When the removal rates of and reach above 95%, respectively, the activated sludge taming in the internal suspended sludge reaction zone is completed;

[0028] S3. No additional S is added to the wastewater from ship exhaust denitrification 2- , intermittent water inlet is changed to continuous water inlet.

[0029] Beneficial effects:

[0030] First, the present application discloses an integrated removal device for ship bilge oily sewage and ship exhaust gas denitrification and desulfurization waste liquid, by sequentially arranging an external deoiling and desulfurization suspended sludge reaction zone, a biofilm reaction zone and an internal suspended sludge reaction zone from the outside to the inside, and arranging an overflow weir on the upper part of the external deoiling and desulfurization suspended sludge reaction zone to communicate with the biofilm reaction zone, so as to realize the coordinated treatment of ship exhaust gas desulfurization wastewater, ship exhaust gas denitrification wastewater and ship bilge oily sewage in one reaction device, converting the macromolecular substances in the oily sewage into small molecular substances, and then into various organic acids, completing the removal of oil in the wastewater, and converting NO 3- and SO4 2- Degraded into environmentally friendly N2 and S 0 , realizing the comprehensive treatment of ship exhaust gas desulfurization wastewater, ship exhaust gas denitrification wastewater and ship bilge oil wastewater, with high environmental and economic benefits.

[0031] Second, the present application discloses a treatment method using an integrated removal device for ship bilge oily wastewater and ship exhaust gas denitrification and desulfurization waste liquid, which adopts intermittent water inlet for separate taming and continuous water inlet for coordinated operation to ensure the coordinated and stable operation of the three inner, middle and outer areas, give full play to the treatment effect of the integrated removal device and ensure its treatment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0033] Figure 1 This is a schematic structural diagram of a device for removing ship bilge oily sewage and ship exhaust gas denitrification and desulfurization waste liquid in an integrated manner disclosed in Example 1 of the present invention;

[0034] Figure 2 The invention discloses a NO removal device for the integrated denitrification and desulfurization of ship bilge oily sewage and ship exhaust gas waste liquid. 3- , oil and TOC removal rates versus treatment days;

[0035] Figure 3 The invention discloses a SO4 removal device for removing waste liquid from ship bilge oily sewage and ship exhaust gas denitrification and desulfurization 2- The relationship between the removal rate and the number of treatment days;

[0036] Figure 4 The distribution law of functional bacteria in the system of a ship bilge oily sewage and ship exhaust gas denitrification and desulfurization waste liquid integrated removal device disclosed by the present invention Figure 1 ;

[0037] Figure 5 The distribution law of functional bacteria in the system of a ship bilge oily sewage and ship exhaust gas denitrification and desulfurization waste liquid integrated removal device disclosed by the present invention Figure 2 .

[0038] 1. Liquid inlet II; 2. Circulation pump; 3. Inspection port; 4. Exhaust valve I; 5. Exhaust valve II; 6. Water outlet; 7. Multi-function port I; 8. Multi-function port II; 9. Multi-function port III; 10. Sampling port I; 11. Sampling port III; 12. Sampling port II; 13. Liquid inlet I; 15. Gas collecting chamber; 16. Sludge settling chamber; 17. Internal suspended sludge reaction zone; 18. Bottom end; 19. Inclined side wall; 2 0. Temperature controller probe; 21. Temperature controller; 22. Solid-liquid-gas separation zone; 23. Overflow weir; 24. Baffle; 241. External baffle; 2411. First upper inclined plate; 2412. First lower inclined plate; 242. Internal baffle; 2421. Second upper inclined plate; 2422. Second lower inclined plate; 25. Biofilm reaction zone; 26. External deoiling and desulfurization suspended sludge reaction zone; 27. Circulation pipe; 28. Multi-function port IV. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] Example 1

[0041] An integrated device for removing ship bilge oily sewage and ship exhaust gas denitrification and desulfurization waste liquid, such as Figure 1 As shown, it includes a tank body, which includes a solid-liquid-gas separation zone 22 and a reaction zone; the solid-liquid-gas separation zone 22 includes a gas collecting chamber 15 and a sludge settling chamber 16, the gas collecting chamber 15 is provided with an exhaust valve Ⅰ4, and the tank body is provided with a water outlet 6; the reaction zone is an inner, middle and outer sleeve structure, from the outside to the inside, it is an external oil removal and desulfurization suspended sludge reaction zone 26, a biofilm reaction zone 25 and an internal suspended sludge reaction zone 17; the upper part of the external oil removal and desulfurization suspended sludge reaction zone 26 is provided with an overflow weir 23 and is connected with the biofilm reaction zone 25, and a baffle 24 is fixed around the inner wall of the upper end of the external oil removal and desulfurization suspended sludge reaction zone 26; the lower end of the internal suspended sludge reaction zone 17 is connected with the lower end of the biofilm reaction zone 25, and the top of the internal suspended sludge reaction zone 17 is connected with the solid-liquid-gas separation zone 22.

[0042] The tank body is provided with a sampling port I10, a sampling port III11, a sampling port II 12, and a liquid inlet I13 from top to bottom. The sampling port I10 and the sampling port II 12 are connected to the biofilm reaction zone 25, and the sampling port I10 and the sampling port II 12 are connected to the circulation pump 2 through the circulation pipe 27; the sampling port III11 and the liquid inlet I13 are connected to the external deoiling and desulfurization suspended sludge reaction zone 26.

[0043] Inspection ports 3 are respectively provided on the tank body at the same height as the three sampling ports and the liquid inlet I13 , and the four inspection ports 3 are connected to the biofilm reaction area 25 .

[0044] On the side of the tank body opposite to the three sampling ports and the liquid inlet I13, there are provided with multifunctional port I7, multifunctional port II8, multifunctional port III9 and multifunctional port IV28 from top to bottom. The multifunctional port I7 and multifunctional port III9 are connected to the internal suspended sludge reaction zone 17, the multifunctional port II8 is connected to the biofilm reaction zone 25, and the multifunctional port IV28 is connected to the external oil removal and desulfurization suspended sludge reaction zone 26.

[0045] An exhaust valve Ⅱ5 is provided on the upper part of the outer sleeve of the inner, middle and outer sleeve structure, and the exhaust valve Ⅱ5 is connected to the external deoiling and desulfurization suspended sludge reaction zone 26 and the biofilm reaction zone 25.

[0046] A liquid inlet II1 is provided at the bottom of the tank body, communicating with the internal suspended sludge reaction zone 17 .

[0047] The biofilm reaction area 25 is filled with fillers, a temperature controller probe 20 is inserted into the middle section of the biofilm reaction area 25 , and the temperature controller probe 20 is connected to a temperature controller 21 .

[0048] The three types of anaerobic activated sludge are inoculated into the inner, middle and outer sleeves of the reaction zone respectively, and the mixed wastewater of flue gas desulfurization wastewater with added organic matter and oily wastewater is introduced into the external de-oiling and desulfurization suspended sludge reaction zone 26; under the action of the suspended sludge inside, the pollutants are degraded by the combined action of hydrolysis and fermentation bacteria and acid-producing bacteria to complete the oil degradation in the system, and sulfate-reducing bacteria (SRB) degrades sulfate into sulfide (S 2- ); subsequently, the mud and water are separated under the action of the baffle 24 and flow into the biofilm reaction zone 25 through the overflow weir 23. 2- ) and the circulating flow, a biofilm with sulfate-reducing bacteria as the dominant functional bacteria gradually forms on the filler, on which sulfate reduction reaction occurs, organic matter and SO4 2- is converted into carbon dioxide (CO2) and S 2- . S generated in the biofilm reaction zone 25 2- The remaining organic matter will flow into the internal suspended sludge reaction zone 17 through the bottom slit along with the wastewater, and react with the incoming nitrate (NO 3- ) is mixed with the ship exhaust gas denitrification wastewater and flows from bottom to top through the internal suspended sludge reaction zone 17, wherein NO 3- and S 2- Degraded into nitrogen (N2) and sulfur (S 0), and organic matter is further degraded into CO2 gas. The ship exhaust gas desulfurization wastewater, ship exhaust gas denitrification wastewater and ship bilge oily sewage are concentrated in one reaction device for coordinated treatment, completing the comprehensive treatment of ship wastewater, reducing space occupation, and having high environmental and economic benefits.

[0049] Specifically, the multifunctional port I7, the multifunctional port II8, the multifunctional port III9 and the multifunctional port IV28 can be used as an inspection port, a sludge filling port, a sampling port and a maintenance port.

[0050] Preferably, the effective volume ratio of the external oil removal and desulfurization suspended sludge reaction zone 26, the biofilm reaction zone 25 and the internal suspended sludge reaction zone 17 is 1:4:1-1:2:1.

[0051] Specifically, the height of the solid-liquid-gas separation zone 22 accounts for 20%-30% of the total height of the tank.

[0052] Specifically, the angle between the inclined side wall 19 connected to the liquid inlet II 1 and the vertical direction is 30°-40°, and the vertical distance between the bottom end 18 of the inner sleeve of the inner, middle and outer sleeve structure and the inclined side wall 19 is 0.5-0.7 cm.

[0053] Preferably, the baffle 24 includes an outer baffle 241 and an inner baffle 242 which are arranged opposite to each other, the outer baffle 241 is located on the inner wall of the outer sleeve, and the inner baffle 242 is located on the outer wall of the middle sleeve of the inner, middle and outer sleeve structure. The baffle 24 can reduce the sedimentation and accumulation of sludge, prevent excessive sedimentation and accumulation of sludge in certain areas, maintain the suspension state of sludge in the reaction zone, and help maintain the stable progress of the reaction.

[0054] Preferably, the outer baffle 241 includes a first upper inclined plate 2411 and a first lower inclined plate 2412; one end of the first upper inclined plate 2411 and the first lower inclined plate 2412 are connected and the angle between them is α; the other ends of the first upper inclined plate 2411 and the first lower inclined plate 2412 are respectively connected to the inner wall of the outer sleeve, and the angle between the first upper inclined plate 2411 and the first lower inclined plate 2412 and the inner wall of the outer sleeve is β.

[0055] The inner baffle 242 includes a second upper inclined plate 2421 and a second lower inclined plate 2422; one end of the second upper inclined plate 2421 and the second lower inclined plate 2422 are connected and the included angle is α; the other ends of the second upper inclined plate 2421 and the second lower inclined plate 2422 are respectively connected to the outer wall of the middle sleeve, and the included angles between the second upper inclined plate 2421 and the second lower inclined plate 2422 and the outer wall of the middle sleeve are β; α is an acute angle, and β is an obtuse angle. β is an obtuse angle, which is more conducive to guiding the flow of fluid, reducing the formation of short-flow and dead zone, and making the flow of fluid in the reaction zone more uniform.

[0056] Preferably, α is 40°-60°, β is 110°-120°, and the vertical distance between the first upper inclined plate 2411 and the first lower inclined plate 2412 and the vertical distance between the second upper inclined plate 2421 and the second lower inclined plate 2422 are both 10-15 cm. The shape of the baffle 24 can more effectively utilize the space in the reaction zone to a certain extent, reduce space waste and thus improve reaction efficiency.

[0057] Preferably, the overflow weir 23 is arranged around the axis of the tank body so that the mixed wastewater treated by the external oil removal and desulfurization suspended sludge reaction zone 26 flows evenly into the biofilm reaction zone 25 in the circumferential direction, avoiding the mixed wastewater treated by the external oil removal and desulfurization suspended sludge reaction zone 26 from flowing to a certain place in the biofilm reaction zone 25, which is beneficial to improving the reaction efficiency.

[0058] Preferably, along the axis direction of the tank body, the distance between the upper end of the filler in the biofilm reaction zone 25 and the overflow weir 23 is 4.0-8.0 cm, and the height of the overflow weir 23 is 1.0-2.0 cm.

[0059] Preferably, the distance between the central axis of the liquid inlet I13 and the bottom surface of the outer sleeve is 1.0-2.0 cm, and the diameter of the liquid inlet I13 is 1.0-3.0 cm.

[0060] Preferably, the distance between the lowermost end of the filler close to the outer sleeve side and the central axis of the liquid inlet II1, and the distance between the lowermost end of the filler and the upper end of the liquid inlet II1 are both 6.0-10.0 cm, so that the mixed wastewater treated in the external oil removal and desulfurization suspended sludge reaction zone 26 can fully flow into the biofilm reaction zone 25, so that it can react more fully in the biofilm reaction zone 25.

[0061] Specifically, the filler is a composite fiber material, which includes: PE (polyethylene) central rope, PE ring sheet and aldehyded vinylon silk bouquet, which is mixed to form the composite fiber material. The composite fiber filler has a large specific surface area, which can provide more attachment and growth space for microorganisms, which is conducive to the large-scale reproduction and growth of microorganisms, thereby improving the sewage treatment efficiency. At the same time, its good flexibility and elasticity are not easily damaged under the impact and agitation of water flow, and can maintain the integrity and stability of the structure; it can allow water to pass through with less resistance, and can also provide a good habitat and reproduction environment for microorganisms.

[0062] Example 2

[0063] This embodiment provides a treatment method using a ship bilge oily sewage and ship exhaust gas denitrification and desulfurization waste liquid integrated removal device, comprising the following steps:

[0064] S1. The anaerobic activated sludge containing SRB is inoculated into the biofilm reaction zone through the inspection port, the anaerobic activated sludge containing mixotrophic desulfurization and denitrification bacteria is inoculated into the internal suspended sludge reaction zone through the multifunctional port I, and the anaerobic activated sludge containing hydrolysis and fermentation bacteria and acid-producing bacteria is inoculated into the external deoiling and desulfurization suspended sludge reaction zone through the multifunctional port IV.

[0065] The inner, middle and outer sleeve structures physically isolate the living space of the three functional bacteria, effectively avoiding the competition among the three bacteria for the living environment, allowing them to better exert their respective degradation capabilities, and circulate in the biofilm reaction area, increasing the contact time between pollutants and functional bacteria, which is beneficial for SRB to exert its degradation function.

[0066] S2, intermittent water inlet method to acclimate the activated sludge;

[0067] The mixed wastewater of ship exhaust gas desulfurization wastewater and oily wastewater with added organic matter is introduced into the external deoiling and desulfurization suspended sludge reaction zone through the liquid inlet I. 2- The ship exhaust gas denitrification wastewater is introduced into the internal suspended sludge reaction zone through the liquid inlet II.

[0068] Contains organic matter, SO4 2- The mixed wastewater with oil flows from bottom to top through the external de-oiling and desulfurization suspended sludge reaction zone. The pollutants are converted into small molecules by the combined action of hydrolysis and fermentation bacteria and acid-producing bacteria, and then into various organic acids to remove the oil. SRB degrades sulfate into S 2- ; Under the action of the baffle, the mud and water are separated, and the mixed wastewater treated in the external deoiling and desulfurization suspended sludge reaction zone flows into the biofilm reaction zone through the overflow weir.

[0069] The mixed wastewater flows through the packing from top to bottom in the biofilm reaction zone, and the pollutants are degraded into S 2-, carbon dioxide and methane (CH4), and the gas produced by the reaction is discharged through the exhaust valve II. After the mixed wastewater flows to the bottom of the biofilm reaction zone, a part of it is transported back to the top of the biofilm reaction zone by the circulation pump and mixed with the mixed wastewater after subsequent treatment in the external deoiling and desulfurization suspended sludge reaction zone, and then flows through the filler again to react; since the generation time of SRB in the biofilm reaction zone is relatively long, the mass transfer efficiency of pollutants in the biofilm reaction zone can be effectively improved through reflux, which is beneficial to the transformation of pollutants; as time goes by, the abundance of SRB in the biofilm reaction zone gradually increases, and its ability to degrade pollutants also increases; a part of it enters the internal suspended sludge reaction zone through the bottom slit, mixes with the ship exhaust gas denitrification wastewater, and then flows through the internal suspended sludge reaction zone from bottom to top, and the reaction products and the mud-water mixture enter the solid-liquid-gas separation zone together, and the gas is discharged through the exhaust valve I; the mud in the mud-water mixture slides back to the reaction zone through the edge of the sludge settling chamber to continue to treat the ship exhaust gas denitrification wastewater, and the supernatant containing sulfur after the mud-water separation is discharged through the outlet. Among them, NO 3- and S 2- Degraded into N2 and S through desulfurization and denitrification 0 , organic matter is further degraded into CO2 gas, CO2, methane and N2 enter the solid-liquid-gas separation area together with the mud-water mixture, and the gas is separated and discharged through exhaust valve I.

[0070] The pollutant detection is carried out on the supernatant discharged from the outlet. When the oil removal rate reaches more than 85%, the activated sludge acclimation of the external deoiling and desulfurization suspended sludge reaction zone is completed; when SO4 2- When the removal rate reaches more than 80%, the activated sludge acclimation in the biofilm reaction zone is completed; 3- and S 2- When the removal rates reach more than 95%, the activated sludge acclimation in the internal suspended sludge reaction zone is completed.

[0071] S3. No additional S is added to the wastewater from ship exhaust denitrification 2- , intermittent water inlet is changed to continuous water inlet.

[0072] Mixed wastewater of ship exhaust gas desulfurization wastewater and oily wastewater with organic matter added, organic matter concentration in C is 200mg / L-600mg / L, oil concentration is 120mg / L-500mg / L, SO4 2- The concentration is 900mg / L-1100mg / L in terms of S, and the NO3 - The concentration of N is 200mg / L-300mg / L, and S is added 2- After that, S 2- The concentration of S is 100 mg / L-200 mg / L, and the temperature of the activated sludge in each sleeve is controlled at 35±0.5℃.

[0073] Intermittent water inflow stage: The hydraulic retention time (HRT) in the external oil removal and desulfurization suspended sludge reaction zone is 36h-48h, and the HRT is gradually reduced; when the oil removal rate reaches more than 80% at the HRT of 48h, the HRT is reduced to 36h, and the water inflow time is 1h-2h each time. The hydraulic retention time in the biofilm reaction zone is 24h-36h, and the HRT is gradually reduced; when SO4 2- When the removal rate reaches more than 80% at HRT of 36h, the HRT is reduced to 24h, and the water inlet time is 1h-2h each time. A reflux device is set up, and sampling port I and sampling port II are connected through a circulation pipe and a circulation pump. The reflux ratio, that is, the ratio of the reflux mixed water volume to the inlet water volume, is (2-5):1, and the reflux ratio is controlled by a circulation pump. The hydraulic retention time in the internal suspended sludge reaction zone is 8h-24h, and the HRT is gradually reduced; when NO 3- When the removal rate reaches more than 85% at HRT of 24h, the HRT is reduced to 8h and the water inflow time is 1h-2h each time.

[0074] Continuous water inflow stage: HRT in the external oil removal and desulfurization suspended sludge reaction zone is 24h-36h; in the biofilm reaction zone, HRT is 12h-24h, and the reflux ratio is (2-5):1; HRT in the internal suspended sludge reaction zone is 4h-12h.

[0075] Preferably, the oily wastewater used for taming the activated sludge is artificially prepared with natural pure seawater (900 mg SO4 2- S / L), diesel (126-504 mg / L), NaHCO3 (added as needed).

[0076] The wastewater from ship exhaust gas desulfurization with organic matter added during the domestication of activated sludge is artificially prepared with natural pure seawater (900mgSO4 2- S / L), NaHCO3 (added as needed) and peptone (510 mgC / L).

[0077] Addition of S during acclimatization of activated sludge 2- The ship exhaust denitrification wastewater is artificially distributed, and its composition is natural pure seawater (900mgSO4 2- S / L), NaHCO3 (added as needed), NaNO3 (125-250 mgN / L) and Na2S (added as needed).

[0078] Preferably, the inoculated activated sludge concentration of the external deoiling and desulfurization suspended sludge reaction zone and the internal suspended sludge reaction zone is 40-60 MLVSS; the inoculated activated sludge concentration of the biofilm reaction zone is 20-40 MLVSS, and the volume of the inoculated sludge accounts for 1:3-1:2 of the total volume of the filler. The three anaerobic activated sludges are taken from the anaerobic fermentation tank or sludge thickening tank of the sewage treatment plant.

[0079] In this embodiment, NO in the treated wastewater is 3- The operation of the whole device is divided into three stages: A, B and C. Each stage lasts for 15-20 days. The results are shown in Figure 2 , Figure 2 NO 3- The relationship between the removal rate of oil and TOC and the number of treatment days, the device has a great influence on NO 3- The removal rates of , oil and TOC are over 96%, 98% and 95% respectively. 2- Tests were performed and the results are shown in Figure 3 , Figure 3 SO4 2- The relationship between the removal rate and the number of treatment days, the device for SO4 2- The average removal rate is 11%. The device has strong impact load resistance during operation and the pollutant treatment effect is stable.

[0080] Combination Figure 4 and Figure 5 As shown, in order to analyze the distribution of functional bacteria in the system in detail, a heat map is drawn with the top 20 bacterial genera in average abundance. The three stages of operation of the device are divided into 11 small stages, including L1-L4 and A1-A7, for detailed analysis of the distribution of functional bacteria in the device on different days; L1-L4 are different stages for detecting microorganisms in the external oil removal and desulfurization suspended sludge reaction zone, and A1-A7 are different stages for detecting microorganisms in the biofilm reaction zone and the internal suspended sludge reaction zone, where the horizontal axis represents different operating stages, and the vertical axis represents different bacterial genera. Different colors in the figure represent the abundance of a genus, and the darker the color, the higher the abundance of the genus. The results in the figure show that the functional bacteria in the system mainly include sulfate-reducing bacteria, elemental sulfur-reducing bacteria, sulfur-oxidizing bacteria, desulfurization and denitrification bacteria, methanogens, acidogens and hydrolysis and fermentation bacteria. Among them, the external oil removal and desulfurization suspended sludge reaction zone mainly contains methanogens, acidogens and hydrolysis and fermentation bacteria, the biofilm reaction zone mainly contains sulfate-reducing bacteria and elemental sulfur-reducing bacteria, and the internal suspended sludge reaction zone mainly contains sulfur-oxidizing bacteria and desulfurization and denitrification bacteria.

[0081] There are many types of sulfate-reducing bacteria in the system, including Thermovirga, Dethiosulfovibrio, Dethiosulfatibacter, Desulfosalsimonas, Desulfovibrio and Desulfatiglans. Most of these bacteria live in high-salt environments and can use amino acids, glucose and small molecular organic acids as carbon sources to convert SO4 2- Restore to S 2- The SRB in the system mainly existed in the biofilm reaction zone, and the types and abundances of SRB in the sludge at the bottom and top of the biofilm reaction zone were similar.

[0082] Sulfurovum and Sulfurimonas are the desulfurization and denitrification bacteria in the system, among which Sulfurovum is mainly composed of S 2- As an electron donor, Sulfurimonas uses S 2- and S 0 As an electron donor, NO2 - or NO3 - Reduced to N2. Sulfurovum and Sulfurimonas are mainly present in the internal suspended sludge reaction zone. As the operation time of the device increases, the abundance of Sulfurovum gradually decreases, while the abundance of Sulfurimonas gradually increases. This indicates that high concentrations of NO3 - It can promote the desulfurization and denitrification reaction of Sulfurimonas, thereby increasing the influent NO3 - concentrations make Sulfurimonas compete with Sulfurovum for S 2- The ability of the enzyme is enhanced, which is beneficial to the improvement of Sulfurimonas activity.

[0083] The bacterial genera with carbon degradation function in the system include Bacteroidetes_VC2.1_Bac22, Peptoclostridium, Aegiribacteria, SC103, JSI, Candidatus_Cloacimonas, Shimia, Donghicola and Latescibacteria. Among them, Peptoclostridium, Aegiribacteria and Bacteroidetes_VC2.1_Bac22 are acidogenic bacteria that can degrade petroleum hydrocarbons, proteins and amino acids into small molecular organic acids; SC103 is a hydrolytic fermentation bacterium that participates in the hydrolysis and acidification process of organic matter; JSI and Candidatus_Cloacimonas are methanogenic bacteria that can degrade amino acids and small molecular organic acids and produce CH4.

[0084] In summary, the inner, middle and outer sleeve structures physically isolate the living space of the three functional bacteria, effectively avoiding the competition among multiple functional bacteria for the living environment, allowing them to better exert their respective degradation capabilities.

[0085] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An integrated device for removing waste liquid from ship bilge oily sewage and ship exhaust gas denitrification and desulfurization, comprising a tank body, the tank body comprising a solid-liquid-gas separation zone (22) and a reaction zone; the solid-liquid-gas separation zone (22) comprising a gas collecting chamber (15) and a sludge settling chamber (16), the gas collecting chamber (15) being provided with an exhaust valve I (4), and the tank body being provided with a water outlet (6); characterized in that: The reaction zone is an inner, middle and outer sleeve structure, and is composed of an external de-oiling and desulfurization suspended sludge reaction zone (26), a biofilm reaction zone (25) and an internal suspended sludge reaction zone (17) from the outside to the inside; an overflow weir (23) is provided at the top of the external de-oiling and desulfurization suspended sludge reaction zone (26) and is connected to the biofilm reaction zone (25); a baffle (24) is fixed around the upper end of the external de-oiling and desulfurization suspended sludge reaction zone (26); the lower end of the internal suspended sludge reaction zone (17) is connected to the lower end of the biofilm reaction zone (25), and the top of the internal suspended sludge reaction zone (17) is connected to the solid-liquid-gas separation zone (22); The tank body is provided with a sampling port I (10), a sampling port III (11), a sampling port II (12), and a liquid inlet I (13) from top to bottom, the sampling port I (10) and the sampling port II (12) are connected to the biofilm reaction zone (25), and the sampling port I (10) and the sampling port II (12) are connected to the circulation pump (2) through a circulation pipe (27); the sampling port III (11) and the liquid inlet I (13) are connected to the external deoiling and desulfurization suspended sludge reaction zone (26); Inspection ports (3) are respectively provided on the tank body at the same height as the three sampling ports and the liquid inlet I (13), and the four inspection ports (3) are connected to the biofilm reaction area (25); The tank body is provided with a multifunctional port I (7), a multifunctional port II (8), a multifunctional port III (9) and a multifunctional port IV (28) in order from top to bottom on a side opposite to the three sampling ports and the liquid inlet I (13); the multifunctional port I (7) and the multifunctional port III (9) are connected to the internal suspended sludge reaction zone (17); the multifunctional port II (8) is connected to the biofilm reaction zone (25); and the multifunctional port IV (28) is connected to the external deoiling and desulfurization suspended sludge reaction zone (26); An exhaust valve II (5) is provided on the upper part of the outer sleeve of the inner, middle and outer sleeve structure, and the exhaust valve II (5) is connected to the external deoiling and desulfurization suspended sludge reaction zone (26) and the biofilm reaction zone (25); The bottom of the tank body is provided with a liquid inlet II (1) which is connected to the internal suspended sludge reaction zone (17); The biofilm reaction zone (25) is filled with fillers, a temperature controller probe (20) is inserted into the middle section of the biofilm reaction zone (25), and the temperature controller probe (20) is connected to the temperature controller (21).

2. The integrated removal device for ship bilge oily sewage and ship exhaust gas denitrification and desulfurization waste liquid according to claim 1 is characterized in that: The effective volume ratio of the external deoiling and desulfurization suspended sludge reaction zone (26), the biofilm reaction zone (25) and the internal suspended sludge reaction zone (17) is 1:4:1-1:2:

1.

3. The integrated removal device for ship bilge oily sewage and ship exhaust gas denitrification and desulfurization waste liquid according to claim 1 is characterized in that: The baffle (24) comprises an outer baffle (241) and an inner baffle (242) which are arranged opposite to each other, wherein the outer baffle (241) is located on the inner wall of the outer sleeve, and the inner baffle (242) is located on the outer wall of the middle sleeve of the inner, middle and outer sleeve structure.

4. The integrated removal device for ship bilge oily sewage and ship exhaust gas denitrification and desulfurization waste liquid according to claim 3 is characterized in that: The outer baffle plate (241) comprises a first upper inclined plate (2411) and a first lower inclined plate (2412); one end of the first upper inclined plate (2411) and the first lower inclined plate (2412) are connected and the included angle is α; the other ends of the first upper inclined plate (2411) and the first lower inclined plate (2412) are respectively connected to the inner wall of the outer sleeve, and the included angles between the first upper inclined plate (2411) and the first lower inclined plate (2412) and the inner wall of the outer sleeve are β; The inner baffle plate (242) comprises a second upper inclined plate (2421) and a second lower inclined plate (2422); one end of the second upper inclined plate (2421) and the second lower inclined plate (2422) are connected and the included angle is α; the other ends of the second upper inclined plate (2421) and the second lower inclined plate (2422) are respectively connected to the outer wall of the middle sleeve, and the included angle between the second upper inclined plate (2421) and the second lower inclined plate (2422) and the outer wall of the middle sleeve is β; α is an acute angle, and β is an obtuse angle.

5. The integrated removal device for ship bilge oily sewage and ship exhaust gas denitrification and desulfurization waste liquid according to claim 4 is characterized in that: The value of α is 40°-60°, the value of β is 110°-120°, and the vertical distance between the first upper inclined plate (2411) and the first lower inclined plate (2412) at both ends, and the vertical distance between the second upper inclined plate (2421) and the second lower inclined plate (2422) at both ends are both 10-15 cm.

6. The integrated removal device for ship bilge oily sewage and ship exhaust gas denitrification and desulfurization waste liquid according to claim 1 is characterized in that: The overflow weir (23) is arranged around the axis of the tank body.

7. The integrated removal device for ship bilge oily sewage and ship exhaust gas denitrification and desulfurization waste liquid according to claim 6 is characterized in that: Along the axis direction of the tank body, the distance between the upper end of the filler in the biofilm reaction zone (25) and the overflow weir (23) is 4.0-8.0 cm, and the height of the overflow weir (23) is 1.0-2.0 cm.

8. The integrated removal device for ship bilge oily sewage and ship exhaust gas denitrification and desulfurization waste liquid according to claim 1 is characterized in that: The distance between the central axis of the liquid inlet I (13) and the bottom surface of the outer sleeve is 1.0-2.0 cm, and the diameter of the liquid inlet I (13) is 1.0-3.0 cm.

9. The integrated removal device for ship bilge oily wastewater and ship exhaust gas denitrification and desulfurization waste liquid according to claim 1 is characterized in that: The distance between the lowermost end of the filler close to the outer sleeve and the central axis of the liquid inlet II (1) and the distance between the lowermost end of the filler and the upper end of the liquid inlet II (1) are both 6.0-10.0 cm.

10. A method for treating ship bilge oily wastewater and ship exhaust gas denitrification and desulfurization waste liquid using an integrated removal device according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Inoculate the anaerobic activated sludge containing sulfate-reducing bacteria into the biofilm reaction zone through the inspection port, inoculate the anaerobic activated sludge containing mixotrophic desulfurization and denitrification bacteria into the internal suspended sludge reaction zone through the multifunctional port I, and inoculate the anaerobic activated sludge containing hydrolysis and fermentation bacteria and acid-producing bacteria into the external deoiling and desulfurization suspended sludge reaction zone through the multifunctional port IV; S2, intermittent water inlet method to acclimate the activated sludge; The mixed wastewater of ship exhaust gas desulfurization wastewater and oily wastewater with added organic matter is introduced into the external deoiling and desulfurization suspended sludge reaction zone through the liquid inlet I; sulfide (S 2- ) is introduced into the internal suspended sludge reaction zone through the liquid inlet II; the mixed wastewater flows from bottom to top through the external de-oiling and desulfurization suspended sludge reaction zone, and the mud and water are separated under the action of the baffle. The mixed wastewater treated in the external de-oiling and desulfurization suspended sludge reaction zone overflows into the biofilm reaction zone through the overflow weir; the mixed wastewater flows from top to bottom through the filler in the biofilm reaction zone, and the gas generated by the reaction is discharged through the exhaust valve II; after the mixed wastewater flows to the bottom of the biofilm reaction zone, a part of it is transported back to the top of the biofilm reaction zone by the circulation pump to be combined with the subsequent external de-oiling and desulfurization suspended sludge reaction zone. The mixed wastewater treated in the oil desulfurization suspended sludge reaction zone is mixed and then flows through the filler again to react; a part of it enters the internal suspended sludge reaction zone through the bottom slit, mixes with the ship exhaust gas denitrification wastewater, and then flows through the internal suspended sludge reaction zone from bottom to top, and the reaction product and the mud-water mixture enter the solid-liquid-gas separation zone together, and the gas is discharged through the exhaust valve I, and the mud in the mud-water mixture slides back to the reaction zone through the edge of the sludge settling chamber to continue to treat the ship exhaust gas denitrification wastewater, and the supernatant containing sulfur after the mud-water separation is discharged through the outlet; The pollutant detection is carried out on the supernatant discharged from the outlet. When the oil removal rate reaches more than 85%, the activated sludge acclimation of the external deoiling and desulfurization suspended sludge reaction zone is completed; when the sulfate (SO4 2- ) removal rate reaches more than 80%, the activated sludge acclimation in the biofilm reaction zone is completed; when the nitrate (NO 3- ) and S 2- When the removal rates of and reach above 95%, respectively, the activated sludge taming in the internal suspended sludge reaction zone is completed; S3. No additional S is added to the wastewater from ship exhaust denitrification 2- , intermittent water inlet is changed to continuous water inlet.

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