A ship bilge oily water and ship waste gas denitrogenation and desulfurization waste liquid integrated removal device and treatment method

Abstract

The application discloses a kind of ship bilge oily water and ship exhaust gas denitrification sulfur waste liquid integrated removal device, including tank body, tank body includes solid-liquid-gas separation zone and reaction zone;Solid-liquid-gas separation zone includes gas collection chamber and sludge settling chamber, gas collection chamber is equipped with exhaust valve I, tank body is equipped with water outlet;Reaction zone is inner, middle, outer sleeve type structure, from outside to inside in order to external oil removal desulfurization suspended sludge reaction zone, biofilm reaction zone and internal suspended sludge reaction zone;External oil removal desulfurization suspended sludge reaction zone upper portion is equipped with overflow weir and is communicated with biofilm reaction zone, external oil removal desulfurization suspended sludge reaction zone upper end is fixed with baffle;Internal suspended sludge reaction zone lower end and biofilm reaction zone lower end are communicated, internal suspended sludge reaction zone top and solid-liquid-gas separation zone are communicated.The application realizes the comprehensive management of ship exhaust gas desulfurization waste water, ship exhaust gas denitrification waste water and ship bilge oily water, with higher environmental and economic benefits.

Description

TECHNICAL FIELD

[0001] The present application relates to the sewage treatment technical field, especially to a ship bilge oily water and ship exhaust gas denitrification and desulfurization waste liquid integrated removal device and treatment method. BACKGROUND

[0002] The number of shipping vessels is increasing worldwide, and their tonnage is also tending to be large, and the environmental pollution problems caused by operation are increasingly prominent.

[0003] The ship fuel oil contains a high content of sulfur, nitrogen and other substances, so that the ship diesel engine exhaust gas contains a large amount of sulfur oxides and nitrogen oxides. These acidic gases discharged into the atmosphere not only cause acid rain, corrode buildings and vegetation, but also have adverse effects on the human respiratory system, especially posing a great environmental risk to coastal areas. In addition, during the sailing and operation of the ship, the mechanical equipment in the cabin runs, fuel is stored and used, etc. will produce oily water. These oily water contains various petroleum hydrocarbon substances, emulsified oil and solid impurities, etc. If directly discharged into the sea, it will cause disastrous damage to the marine ecological environment. Therefore, international and domestic relevant regulations have put forward strict restrictions on the discharge of ship bilge oily water.

[0004] The ship exhaust gas currently adopts a wet scrubbing method for denitrification and desulfurization, which produces a large amount of scrubbing waste liquid, which occupies valuable ship space together with the ship bilge oily water. Therefore, the off-shore integrated treatment of the ship exhaust gas scrubbing waste liquid and the ship bilge oily water is imminent. SUMMARY

[0005] The present application provides a ship bilge oily water and ship exhaust gas denitrification and desulfurization waste liquid integrated removal device to solve the above technical problems.

[0006] In order to achieve the above purpose, the technical scheme of the present application is as follows:

[0007] A ship bilge oily water and ship exhaust gas denitrification and desulfurization waste liquid integrated removal device, comprising a tank body, the tank body comprising a solid-liquid-gas separation zone and a reaction zone; the solid-liquid-gas separation zone comprises a gas collection chamber and a sludge settling chamber, the gas collection chamber is provided with an exhaust valve I, and the tank body is provided with a water outlet; the reaction zone is of an inner, middle and outer sleeve structure, and comprises an outer oil removal and desulfurization suspended sludge reaction zone, a biofilm reaction zone and an inner suspended sludge reaction zone from outside to inside; the outer oil removal and desulfurization suspended sludge reaction zone is communicated with the biofilm reaction zone through an overflow weir arranged at the upper portion of the outer oil removal and desulfurization suspended sludge reaction zone, and a baffle is fixed around the upper end of the outer oil removal and desulfurization suspended sludge reaction zone; the lower end of the inner suspended sludge reaction zone is communicated with the lower end of the biofilm reaction zone, and the top end of the inner suspended sludge reaction zone is communicated with 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 in sequence, sampling port I and sampling port II communicate the biofilm reaction zone, sampling port I and sampling port II are connected by circulating pipe and circulating pump; sampling port III and liquid inlet I communicate the external oil removal and desulfurization suspended sludge reaction zone.

[0009] The tank body is provided with inspection ports at the same height as the three sampling ports and liquid inlet I, and the four inspection ports communicate the biofilm reaction zone.

[0010] The tank body is provided with multifunctional port I, multifunctional port II, multifunctional port III and multifunctional port IV from top to bottom on the side opposite to the three sampling ports and liquid inlet I, multifunctional port I and multifunctional port III communicate the internal suspended sludge reaction zone, multifunctional port II communicates the biofilm reaction zone, and multifunctional port IV communicates the external oil removal and desulfurization suspended sludge reaction zone.

[0011] The outer sleeve of the inner, middle and outer sleeve type structure is provided with exhaust valve II, which communicates the external oil removal and desulfurization suspended sludge reaction zone and the biofilm reaction zone.

[0012] The tank body is provided with liquid inlet II at the bottom, which communicates the internal suspended sludge reaction zone.

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

[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 oppositely arranged outer baffle and inner baffle, 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 type structure.

[0016] Preferably, the outer baffle includes first upper inclined plate and first lower inclined plate; one end of the first upper inclined plate and the first lower inclined plate is connected and the included angle is α; the other end of the first upper inclined plate and the first lower inclined plate is connected with the inner wall of the outer sleeve respectively, and the included angle between the first upper inclined plate and the inner wall of the outer sleeve and the included angle between the first lower inclined plate and the inner wall of the outer sleeve is β;

[0017] The inner baffle includes second upper inclined plate and second lower inclined plate; one end of the second upper inclined plate and the second lower inclined plate is connected and the included angle is α; the other end of the second upper inclined plate and the second lower inclined plate is connected with the outer wall of the middle sleeve respectively, and the included angle between the second upper inclined plate and the outer wall of the middle sleeve and the included angle between 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 distance between the two ends of the first upper inclined plate and the first lower inclined plate, and the vertical distance between the two ends of the second upper inclined plate and the second lower inclined plate are both 10-15cm.

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

[0020] Preferably, along the axial direction of the tank body, the distance between the upper end of the packing material in the biofilm reaction zone 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 bottom end of the packing near the outer sleeve and the central axis of the inlet II, and the distance between the bottom end of the packing and the top end of the inlet II are both 6.0-10.0 cm.

[0023] A treatment method using an integrated removal device for ship bilge oily wastewater and ship exhaust gas denitrification and desulfurization wastewater includes the following steps:

[0024] S1. Anaerobic activated sludge containing sulfate-reducing bacteria is inoculated into the biofilm reaction zone through the inspection port. Anaerobic activated sludge containing facultative desulfurization and denitrification bacteria is inoculated into the internal suspended sludge reaction zone through multifunctional port I. Anaerobic activated sludge containing hydrolytic fermentation bacteria and acid-producing bacteria is inoculated into the external oil removal and desulfurization suspended sludge reaction zone through multifunctional port IV.

[0025] S2. The activated sludge is acclimatized using an intermittent water influent method;

[0026] Mixed wastewater from ship exhaust gas desulfurization and oily wastewater, with added organic matter, is introduced into the external oil removal and desulfurization suspended sludge reaction zone through inlet I; sulfides (S) are added. 2-) through the liquid inlet II into the internal suspended sludge reaction zone; the mixed wastewater flows through the external oil removal and desulfurization suspended sludge reaction zone from bottom to top, and is separated into sludge and water under the action of the baffle; the mixed wastewater treated by the external oil removal and desulfurization suspended sludge reaction zone flows into the biofilm reaction zone through the overflow weir; the mixed wastewater flows through the filler in the biofilm reaction zone from top to bottom, and the generated gas is discharged through the exhaust valve II; after flowing to the bottom of the biofilm reaction zone, part of the mixed wastewater is transported back to the top of the biofilm reaction zone by the circulating pump, mixed with the mixed wastewater treated by the subsequent external oil removal and desulfurization suspended sludge reaction zone, and then flows through the filler again to react; part of the mixed wastewater enters the internal suspended sludge reaction zone through the bottom slit, mixes with the ship exhaust gas denitration wastewater, and flows through the internal suspended sludge reaction zone from bottom to top; the reaction products and the sludge-water mixture enter the solid-liquid-gas separation zone, the gas is discharged through the exhaust valve I, and the sludge in the sludge-water mixture slides back to the reaction zone through the edge of the sludge settling chamber to continue treating the ship exhaust gas denitration wastewater, and the supernatant containing elemental sulfur after the separation of sludge and water is discharged through the water outlet;

[0027] When the removal rate of oil reaches 85% or more, the activated sludge in the external oil removal and desulfurization suspended sludge reaction zone is domesticated; when the removal rate of sulfate (SO4 2- ) reaches 80% or more, the activated sludge in the biofilm reaction zone is domesticated; when the removal rates of nitrate (NO 3- ) and S 2- reach 95% or more respectively, the activated sludge in the internal suspended sludge reaction zone is domesticated;

[0028] S3, no additional S 2- is added in the ship exhaust gas denitration wastewater, and the intermittent water feeding is changed to continuous water feeding.

[0029] Advantages:

[0030] Firstly, the ship bilge oil sewage and ship exhaust gas denitration and desulfurization wastewater integrated removal device disclosed by the application realizes the collaborative treatment of ship exhaust gas desulfurization wastewater, ship exhaust gas denitration wastewater and ship bilge oil sewage in one reaction device, converts large molecular substances in oil sewage into small molecular substances, and then into various organic acids, completes the removal of oil in wastewater, and degrades NO 3- and SO4 2- into N2 and S 0 which are harmless to the environment, realizes the comprehensive treatment of ship exhaust gas desulfurization wastewater, ship exhaust gas denitration wastewater and ship bilge oil sewage, and has high environmental and economic benefits.

[0031] Second, the application discloses a treatment method of an integrated removal device for ship bilge oily water and denitrogenated and desulfurized waste liquid of ship exhaust gas. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0033] Figure 1 Figure 1 is a structural schematic diagram of the integrated removal device for ship bilge oily water and denitrogenated and desulfurized waste liquid of ship exhaust gas disclosed by the present application;

[0034] Figure 2 Figure 2 is a removal rate of NO of the integrated removal device for ship bilge oily water and denitrogenated and desulfurized waste liquid of ship exhaust gas disclosed by the present application; 3- Figure 3 is a removal rate of oil and TOC of the integrated removal device for ship bilge oily water and denitrogenated and desulfurized waste liquid of ship exhaust gas disclosed by the present application;

[0035] Figure 3 Figure 4 is a removal rate of SO4 of the integrated removal device for ship bilge oily water and denitrogenated and desulfurized waste liquid of ship exhaust gas disclosed by the present application; 2- Figure 5 is a removal rate of NH4+ of the integrated removal device for ship bilge oily water and denitrogenated and desulfurized waste liquid of ship exhaust gas disclosed by the present application;

[0036] Figure 4 Figure 6 is a distribution rule of functional bacteria in the system of the integrated removal device for ship bilge oily water and denitrogenated and desulfurized waste liquid of ship exhaust gas disclosed by the present application; Figure 1

[0037] Figure 5 Figure 7 is a distribution rule of functional bacteria in the system of the integrated removal device for ship bilge oily water and denitrogenated and desulfurized waste liquid of ship exhaust gas disclosed by the present application; 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. Multifunctional Port I; 8. Multifunctional Port II; 9. Multifunctional Port III; 10. Sampling Port I; 11. Sampling Port III; 12. Sampling Port II; 13. Liquid Inlet I; 15. Gas Collection Chamber; 16. Sludge Settling Chamber; 17. Internal Suspended Sludge Reaction Zone; 18. Bottom End; 19. Inclined Sidewall; 2 0. Temperature controller probe; 21. Temperature controller; 22. Solid-liquid-gas separation zone; 23. Overflow weir; 24. Baffle; 241. Outer baffle; 2411. First upper inclined plate; 2412. First lower inclined plate; 242. Inner baffle; 2421. Second upper inclined plate; 2422. Second lower inclined plate; 25. Biofilm reaction zone; 26. External oil removal and desulfurization suspended sludge reaction zone; 27. Circulation pipe; 28. Multifunctional port IV. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] Example 1

[0041] An integrated removal device for oily wastewater from ship bilge and denitrification / desulfurization wastewater from ship exhaust gas, such as... Figure 1 As shown, the system includes a tank, which comprises a solid-liquid-gas separation zone 22 and a reaction zone. The solid-liquid-gas separation zone 22 includes a gas collection chamber 15 and a sludge settling chamber 16. The gas collection chamber 15 is equipped with an exhaust valve I4, and the tank is equipped with an outlet 6. The reaction zone has an inner, middle, and outer sleeve structure, consisting of an outer oil-removing and desulfurizing suspended sludge reaction zone 26, a biofilm reaction zone 25, and an inner suspended sludge reaction zone 17, arranged from the outside in. The outer oil-removing and desulfurizing suspended sludge reaction zone 26 is equipped with an overflow weir 23 at its upper part, which is connected to the biofilm reaction zone 25. A baffle 24 is fixed around the inner wall of the upper end of the outer oil-removing and desulfurizing suspended sludge reaction zone 26. The lower end of the inner suspended sludge reaction zone 17 is connected to the lower end of the biofilm reaction zone 25, and the top end of the inner suspended sludge reaction zone 17 is connected to the solid-liquid-gas separation zone 22.

[0042] The tank is equipped with sampling port I10, sampling port III11, sampling port II12, and liquid inlet I13 from top to bottom. Sampling port I10 and sampling port II12 are connected to the biofilm reaction zone 25. Sampling port I10 and sampling port II12 are connected to the circulation pump 2 through circulation pipe 27. Sampling port III11 and liquid inlet I13 are connected to the external oil removal and desulfurization suspended sludge reaction zone 26.

[0043] The tank body is provided with inspection ports 3 at the same height as the three sampling ports and the liquid inlet I13, and the four inspection ports 3 communicate with the biofilm reaction zone 25.

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

[0045] The outer sleeve of the inner, middle and outer sleeve structure is provided with an exhaust valve II5 at the upper part, and the exhaust valve II5 communicates with the external oil removal and desulfurization suspended sludge reaction zone 26 and the biofilm reaction zone 25.

[0046] The tank body is provided with a liquid inlet II1 at the bottom, which communicates with the internal suspended sludge reaction zone 17.

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

[0048] Three kinds of anaerobic activated sludge are inoculated into the inner, middle and outer sleeves of the reaction zone, and the mixed wastewater of flue gas desulfurization wastewater and oil-containing wastewater added with organic matter is introduced into the external oil removal and desulfurization suspended sludge reaction zone 26; under the action of the internal suspended sludge, the pollutants complete oil degradation in the system through the joint action of hydrolytic fermentation bacteria and acid-producing bacteria, and the sulfate-reducing bacteria (SRB) degrade the sulfate into sulfide (S 2- ); then the sludge and water are separated under the action of the baffle 24, and flow into the biofilm reaction zone 25 through the overflow weir 23. Under the action of the influent organic matter, sulfate (SO4 2- ) and the circulating flow, a biofilm with sulfate-reducing bacteria as the dominant functional bacteria gradually forms on the filler, and the sulfate reduction reaction occurs on the biofilm, and the organic matter and SO4 2- are converted into carbon dioxide (CO2) and S 2- . The S 2- and the remaining organic matter generated in the biofilm reaction zone 25 enter the internal suspended sludge reaction zone 17 through the bottom slit, and are mixed with the ship exhaust denitration wastewater containing nitrate (NO 3- ), and flow through the internal suspended sludge reaction zone 17 from bottom to top, wherein the NO 3- and S 2- are degraded into nitrogen (N2) and elemental sulfur (S 0), the organic matter is further degraded into CO2 gas. The ship exhaust gas desulfurization wastewater, ship exhaust gas denitration wastewater and ship bilge oil wastewater are cooperatively treated in one reaction device, the comprehensive treatment of the ship wastewater is completed, the space occupation is reduced, and high environmental and economic benefits are obtained.

[0049] Specifically, the multifunctional port I 7, the multifunctional port II 8, the multifunctional port III 9 and the multifunctional port IV 28 can be used as inspection ports, sludge filling ports, sampling ports and maintenance ports.

[0050] Preferably, the effective volume ratio of the external oil-removing and desulfurizing 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 body.

[0052] Specifically, the angle between the inclined side wall 19 connected by 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 oppositely arranged outer baffle 241 and inner baffle 242, 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 some areas, maintain the suspended state of sludge in the reaction zone, and facilitate the stable operation 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 is connected and the included angle is α; the other end of the first upper inclined plate 2411 and the first lower inclined plate 2412 is connected with the inner wall of the outer sleeve respectively, and the included 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 is connected and the included angle is α; the other end of the second upper inclined plate 2421 and the second lower inclined plate 2422 is connected with the outer wall of the middle sleeve respectively, 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. The obtuse angle β is more conducive to guiding the flow of fluid, reducing the formation of short flow and dead zone, and making the flow of fluid more uniform in the reaction zone.

[0056] Preferably, the value of a is 40°-60°, the value of b is 110°-120°, the vertical distance between the two ends of the first upper inclined plate 2411 and the first lower inclined plate 2412, and the vertical distance between the two ends of the second upper inclined plate 2421 and the second lower inclined plate 2422 are all 10-15 cm. The shape of the baffle 24 can make more efficient use of the space in the reaction zone to some extent, reduce space waste and thus improve reaction efficiency.

[0057] Preferably, the overflow weir 23 is arranged around the tank axis, so that the mixed wastewater treated by the external oil removal and desulfurization suspended sludge reaction zone 26 flows uniformly 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 of the biofilm reaction zone 25, which is conducive to improving the reaction efficiency.

[0058] Preferably, in the direction of the tank axis, the distance between the upper end of the biofilm reaction zone 25 filler 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 near the side of the outer sleeve 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 by the external oil removal and desulfurization suspended sludge reaction zone 26 can flow into the biofilm reaction zone 25 sufficiently, so that it can react more fully in the biofilm reaction zone 25.

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

[0062] Example 2

[0063] The embodiment provides a treatment method using a ship bilge oily water and ship exhaust gas denitrification and desulfurization waste liquid integrated removal device, which comprises 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 the syntrophic desulfurization denitrifying bacteria is inoculated into the internal suspended sludge reaction zone through the multifunctional port I, and the anaerobic activated sludge containing the hydrolysis and fermentation bacteria and the acid-producing bacteria is inoculated into the external oil-removing desulfurization suspended sludge reaction zone through the multifunctional port IV.

[0065] The inner, middle and outer sleeve type structure physically separates the living space of the three functional bacteria, effectively avoids the competition of the three bacteria for the living environment, makes them better play their respective degradation capabilities, and circulates in the biofilm reaction zone, increases the contact time of pollutants and functional bacteria, and is beneficial to the degradation function of SRB.

[0066] S2, the activated sludge is acclimated in an intermittent water feeding mode.

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

[0068] The mixed wastewater containing organic matter, SO4 2- and oil flows from bottom to top through the external oil-removing desulfurization suspended sludge reaction zone, the pollutants are converted into small molecular substances by the joint action of the hydrolysis and fermentation bacteria and the acid-producing bacteria, and then into various organic acids, realizing the removal of oil, and the SRB degrades the sulfate into S 2- ; under the action of the baffle, the sludge and water are separated, and the mixed wastewater treated by the external oil-removing desulfurization suspended sludge reaction zone flows into the biofilm reaction zone through the overflow weir.

[0069] The mixed wastewater flows through the filler in the biofilm reaction zone from top to bottom, and the pollutants are degraded into S 2-carbon dioxide and methane (CH4), the reaction gas 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 circulating pump and mixed with the mixed wastewater treated by the subsequent external oil removal and desulfurization suspended sludge reaction zone, and then flows through the filler again to react; because the generation time of SRB in the biofilm reaction zone is relatively long, the backflow can effectively improve the mass transfer efficiency of pollutants in the biofilm reaction zone, which is beneficial to the transformation of pollutants; with the passage of time, 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 denitration wastewater, and flows from bottom to top through the internal suspended sludge reaction zone, and the reaction products enter the solid-liquid-gas separation zone together with the mud-water mixture, 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 denitration wastewater, and the supernatant containing elemental sulfur after mud-water separation is discharged through the water outlet. Among them, NO 3- and S 2- are degraded into N2 and S 0 through the desulfurization denitrification reaction, and the organic matter is further degraded into CO2 gas, CO2, methane and N2 enter the solid-liquid-gas separation zone together with the mud-water mixture, and the gas is separated out and then discharged through the exhaust valve I.

[0070] When the removal rate of oil reaches more than 85%, the activated sludge in the external oil removal and desulfurization suspended sludge reaction zone is domesticated; when the removal rate of SO4 2- is more than 80%, the activated sludge in the biofilm reaction zone is domesticated; and when the removal rates of NO 3- and S 2- reach more than 95% respectively, the activated sludge in the internal suspended sludge reaction zone is domesticated.

[0071] S3, no additional S 2- is added in the ship exhaust denitration wastewater, and the intermittent water inlet is replaced by continuous water inlet.

[0072] The mixed wastewater of the ship exhaust desulfurization wastewater and the oil-containing wastewater with organic matter has an organic matter concentration of 200mg / L-600mg / L in terms of C, an oil concentration of 120mg / L-500mg / L, a SO4 2- concentration of 900mg / L-1100mg / L in terms of S, and a NO3 - concentration of 200mg / L-300mg / L in terms of N in the ship exhaust denitration wastewater, and after adding S 2- , the concentration of S 2- is 100mg / L-200mg / L in terms of S, and the temperature of the activated sludge in each sleeve is controlled at 35±0.5℃.

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

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

[0075] Preferably, the oil-containing wastewater used for acclimatization of the activated sludge is artificially prepared, and the composition is natural pure seawater (900 mg SO4 2- S / L), diesel oil (126-504 mg / L), and NaHCO3 (added as needed).

[0076] The ship exhaust gas desulfurization wastewater used for acclimatization of the activated sludge and addition of organic matters is artificially prepared, and the composition is natural pure seawater (900 mg SO4 2- S / L), NaHCO3 (added as needed), and protein peptone (510 mg C / L).

[0077] The ship exhaust gas denitration wastewater used for acclimatization of the activated sludge and addition of S 2- is artificially prepared, and the composition is natural pure seawater (900 mg SO4 2- S / L), NaHCO3 (added as needed), NaNO3 (125-250 mg N / L), and Na2S (added as needed).

[0078] Preferably, the external oil-removing and desulfurizing suspended sludge reaction zone and the internal suspended sludge reaction zone are inoculated with activated sludge at a concentration of 40-60 MLVSS; the biofilm reaction zone is inoculated with activated sludge at a concentration of 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 sludge is taken from the anaerobic fermentation tank or sludge thickening tank of a sewage treatment plant.

[0079] In the present embodiment, the NO 3- , oil and total organic carbon (TOC) in the treated waste liquid are detected, and the operation of the entire device is divided into three stages A, B and C, each stage lasting for 15-20 days, and the results are shown in Figure 2 , Figure 2 The removal rates of NO 3- , oil and TOC are shown in the relationship with the treatment days, and the removal rates of NO 3- , oil and TOC of the device are more than 96%, 98% and 95% respectively. The SO4 2- in the treated waste liquid is also detected, and the results are shown in Figure 3 , Figure 3 The removal rate of SO4 2- is shown in the relationship with the treatment days, and the average removal rate of SO4 2- of the device is 11%, and the device has strong impact load capacity and stable pollutant treatment effect during the entire operation.

[0080] As shown in Figure 4 and Figure 5 , a heat map is drawn with the top 20 genera of average abundance to analyze the distribution of functional bacteria in the system in detail. The three stages of the device operation are divided into L1-L4 and A1-A7, a total of 11 small stages, for detailed analysis of the distribution of functional bacteria in the device at different days; L1-L4 are different stages of detecting microorganisms in the external oil-removing and desulfurizing suspended sludge reaction zone, and A1-A7 are different stages of detecting microorganisms in the biofilm reaction zone and the internal suspended sludge reaction zone, wherein the abscissa represents different operation stages, the ordinate represents different genera, and different colors in the figure represent the abundance of the genera, and the darker the color, the higher the abundance of the genera. 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 denitrifying bacteria, methanogenic bacteria, acid-producing bacteria and hydrolysis and fermentation bacteria, wherein the methanogenic bacteria, acid-producing bacteria and hydrolysis and fermentation bacteria mainly exist in the external oil-removing and desulfurizing suspended sludge reaction zone, the sulfate-reducing bacteria and elemental sulfur-reducing bacteria mainly exist in the biofilm reaction zone, and the sulfur-oxidizing bacteria and desulfurization denitrifying bacteria mainly exist in the internal suspended sludge reaction zone.

[0081] The system contains a variety of sulfate-reducing bacteria, including Thermovirga, Dethiosulfovibrio, Dethiosulfatibacter, Desulfosalsimonas, Desulfovibrio and Desulfatiglans. These genera mostly exist in high-salt environments and can use amino acids, glucose and small-molecule organic acids as carbon sources to reduce SO4 2- to S 2- . The SRB in the system mainly exist in the biofilm reaction zone, and the species and abundance of SRB in the bottom and upper sludge of the biofilm reaction zone are similar.

[0082] Sulfurovum and Sulfurimonas are desulfurization denitrifying bacteria in the system, in which Sulfurovum uses S 2- as the electron donor, Sulfurimonas uses S 2- and S 0 as the electron donor to reduce NO2 - or NO3 - to N2. Sulfurovum and Sulfurimonas mainly exist in the internal suspended sludge reaction zone. With the extension of the operation time of the device, the abundance of Sulfurovum gradually decreases, and the abundance of Sulfurimonas gradually increases. This shows that high concentration of NO3 - can promote the desulfurization denitrification reaction of Sulfurimonas, so increasing the NO3 - concentration of the influent can enhance the ability of Sulfurimonas and Sulfurovum to compete for S 2- , which is conducive to the improvement of the activity of Sulfurimonas.

[0083] The 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 acid-producing bacteria that can degrade petroleum hydrocarbons, proteins and amino acids into small-molecule organic acids; SC103 is a hydrolytic fermentation bacterium that participates in the hydrolytic acidification process of organic matter; JSI and Candidatus_Cloacimonas are methanogenic bacteria that can degrade amino acids and small-molecule organic acids and produce CH4.

[0084] In summary, the inner, middle and outer sleeve structure physically separates the survival space of the three functional bacteria, effectively avoids the competition of the multiple functional bacteria for the survival environment, and enables them to better exert their respective degradation capabilities.

[0085] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An integrated removal device for marine bilge oily wastewater and marine exhaust gas denitrification and desulfurization wastewater, comprising a tank, the tank comprising a solid-liquid-gas separation zone (22) and a reaction zone; the solid-liquid-gas separation zone (22) comprising a gas collection chamber (15) and a sludge settling chamber (16), the gas collection chamber (15) being provided with an exhaust valve I (4), and the tank being provided with a water outlet (6); characterized in that, The reaction zone has an inner, middle and outer sleeve structure, consisting of an outer oil-desulfurization suspended sludge reaction zone (26), a biofilm reaction zone (25) and an inner suspended sludge reaction zone (17) from the outside to the inside. The outer oil-desulfurization suspended sludge reaction zone (26) is provided with an overflow weir (23) at the top and is connected to the biofilm reaction zone (25). A baffle (24) is fixed around the top of the outer oil-desulfurization suspended sludge reaction zone (26). The lower end of the inner suspended sludge reaction zone (17) is connected to the lower end of the biofilm reaction zone (25). The top of the inner suspended sludge reaction zone (17) is connected to the solid-liquid-gas separation zone (22). The tank is provided with sampling port I (10), sampling port III (11), sampling port II (12), and liquid inlet I (13) from top to bottom. Sampling port I (10) and sampling port II (12) are connected to the biofilm reaction zone (25). Sampling port I (10) and sampling port II (12) are connected to the circulation pipe (27) and circulation pump (2) through the circulation pipe (27). Sampling port III (11) and liquid inlet I (13) are connected to the external oil removal and desulfurization suspended sludge reaction zone (26). Inspection ports (3) are provided on the tank 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 zone (25). The tank body is provided with multifunctional port I (7), multifunctional port II (8), multifunctional port III (9) and multifunctional port IV (28) on the side opposite to the three sampling ports and the liquid inlet I (13) from top to bottom. Multifunctional port I (7) and multifunctional port III (9) are connected to the internal suspended sludge reaction zone (17), multifunctional port II (8) is connected to the biofilm reaction zone (25), and multifunctional port IV (28) is connected to the external oil removal and desulfurization suspended sludge reaction zone (26). The upper part of the outer sleeve of the inner, middle and outer sleeve structure is provided with an exhaust valve II (5), which connects the external oil removal and desulfurization suspended sludge reaction zone (26) and the biofilm reaction zone (25). The tank is provided with a liquid inlet II (1) at the bottom, which is connected to the internal suspended sludge reaction zone (17). The biofilm reaction zone (25) is filled with filler, and a temperature controller probe (20) is inserted into the middle section of the biofilm reaction zone (25). The temperature controller probe (20) is connected to the temperature controller (21). The baffle (24) includes an outer baffle (241) and an inner baffle (242) 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 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 together and the included angle is α. The other end 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 respectively β. 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 end 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.

2. The integrated removal device for ship bilge oily wastewater and ship exhaust gas denitrification and desulfurization wastewater according to claim 1, characterized in that, 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.

3. The integrated removal device for ship bilge oily wastewater and ship exhaust gas denitrification and desulfurization wastewater according to claim 1, characterized in that, The value of α is 40°-60°, the value of β is 110°-120°, and the vertical distance between the two ends of the first upper inclined plate (2411) and the first lower inclined plate (2412), and the vertical distance between the two ends of the second upper inclined plate (2421) and the second lower inclined plate (2422) are all 10-15cm.

4. The integrated removal device for ship bilge oily wastewater and ship exhaust gas denitrification and desulfurization wastewater according to claim 1, characterized in that, The overflow weir (23) is arranged around the axis of the tank.

5. The integrated removal device for ship bilge oily wastewater and ship exhaust gas denitrification and desulfurization wastewater according to claim 4, characterized in that, Along the axial direction of the tank body, the distance between the upper end of the packing of the biofilm reaction zone (25) and the overflow weir (23) is 4.0-8.0cm, and the height of the overflow weir (23) is 1.0-2.0cm.

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

7. The integrated removal device for ship bilge oily wastewater and ship exhaust gas denitrification and desulfurization wastewater according to claim 1, characterized in that, The distance between the bottom end of the packing material and the central axis of the inlet II (1) and the distance between the bottom end of the packing material and the top end of the inlet II (1) are both 6.0-10.0 cm.

8. A treatment method using an integrated removal device for ship bilge oily wastewater and ship exhaust gas denitrification and desulfurization wastewater as described in any one of claims 1-7, characterized in that, Includes the following steps: S1. Anaerobic activated sludge containing sulfate-reducing bacteria is inoculated into the biofilm reaction zone through the inspection port. Anaerobic activated sludge containing facultative desulfurization and denitrification bacteria is inoculated into the internal suspended sludge reaction zone through multifunctional port I. Anaerobic activated sludge containing hydrolytic fermentation bacteria and acid-producing bacteria is inoculated into the external oil removal and desulfurization suspended sludge reaction zone through multifunctional port IV. S2. The activated sludge is acclimatized using an intermittent water influent method; The mixed wastewater from ship exhaust gas desulfurization with added organic matter and oily wastewater is introduced into the external oil removal and desulfurization suspended sludge reaction zone through inlet I; the wastewater from ship exhaust gas denitrification with added sulfides is introduced into the internal suspended sludge reaction zone through inlet II; the mixed wastewater flows from bottom to top through the external oil removal and desulfurization suspended sludge reaction zone, where sludge and water are separated by baffles; the mixed wastewater treated in the external oil removal and desulfurization suspended sludge reaction zone overflows through the overflow weir into the biofilm reaction zone; the mixed wastewater flows from top to bottom through the packing material in the biofilm reaction zone, and the gas generated by the reaction is discharged through exhaust valve II; the mixed wastewater flows to the bottom of the biofilm reaction zone. The latter part is pumped back to the top of the biofilm reaction zone by the circulating pump and mixed with the mixed wastewater after treatment in the subsequent external oil removal and desulfurization suspended sludge reaction zone. It then flows through the packing again to react. Another part enters the internal suspended sludge reaction zone through the bottom slit, mixes with the ship exhaust gas denitrification wastewater, and flows from bottom to top through the internal suspended sludge reaction zone. The reaction products and the mud-water mixture enter the solid-liquid-gas separation zone together. The gas is discharged through exhaust valve I. The mud in the mud-water mixture slides back into the reaction zone through the edge of the sludge settling chamber to continue treating the ship exhaust gas denitrification wastewater. The supernatant containing elemental sulfur after mud-water separation is discharged through the outlet. For the supernatant discharged from the outlet, pollutant testing is performed. When the oil removal rate reaches 85% or more, the activated sludge acclimation in the external oil removal and desulfurization suspended sludge reaction zone is completed; when the sulfate removal rate reaches 80% or more, the activated sludge acclimation in the biofilm reaction zone is completed; when the nitrate and sulfide removal rates reach 95% or more respectively, the activated sludge acclimation in the internal suspended sludge reaction zone is completed. S3. No additional sulfides will be added to the denitrification wastewater of ship exhaust gas, and the intermittent water intake will be changed to continuous water intake.

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