A ship sewage recycling system

Abstract

This utility model discloses a ship wastewater recycling system, relating to the field of ship wastewater treatment equipment. It includes: an oily wastewater physical filter module, with its inlet connected to an oily wastewater discharge pipe and its outlet connected to an grease trap; a first membrane separation module, with its inlet connected to the outlet of the grease trap and its outlet connected to a first activated carbon treatment module; and a first pathogen treatment module, connected to the outlet of the first activated carbon treatment module and its outlet connected to a ship cooling circulation module. This recycling system treats oily wastewater generated on ships and allows it to be used for ship cooling circulation, thus reducing freshwater consumption and effectively utilizing ship wastewater, providing a new supply path for daily ship use.

Description

Technical Field

[0001] This utility model belongs to the field of ship sewage treatment equipment, and more specifically, relates to a ship sewage recycling system. Background Technology

[0002] Ships generate a significant amount of wastewater during navigation. The common treatment method involves treating the wastewater to meet standards before discharge, a process that consumes substantial manpower and resources. Furthermore, crew members typically store freshwater in desalination tanks for daily use. When this freshwater is depleted, desalination plants are used to replenish it, a process that consumes considerable energy. Therefore, a system capable of recycling ship wastewater is needed to reduce energy consumption on ships. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a ship wastewater recycling system. This system treats oily wastewater generated on ships and then reuses it for ship cooling cycles. This reduces freshwater consumption and effectively utilizes ship wastewater, providing a new supply path for daily ship use.

[0004] To achieve the above objectives, this utility model provides a ship wastewater recycling system, comprising:

[0005] The oily wastewater physical filter module has its inlet end connected to the oily wastewater discharge pipe, and its outlet end connected to the grease trap.

[0006] The inlet of the first membrane separation module is connected to the outlet of the oil separator, and the outlet of the first membrane separation module is connected to the first activated carbon treatment module.

[0007] The first pathogen treatment module is connected to the outlet end of the first activated carbon treatment module, and the outlet end of the first pathogen treatment module is connected to the ship cooling circulation module.

[0008] Optionally, the ship cooling circulation module includes:

[0009] The cooling circulation pipeline is connected at its inlet end to the first pathogen treatment module.

[0010] The first recycled water tank has its inlet end connected to the outlet end of the cooling circulation pipeline. A temperature sensor is installed in the first recycled water tank, and heat sinks are installed on the first recycled water tank.

[0011] The outlet of the first recycled water tank is connected to the inlet of the cooling circulation pipeline via a control valve and a return water pipeline;

[0012] The control unit is connected to the temperature sensor and the control valve. When the temperature sensor detects that the liquid temperature in the first recycled water tank is lower than the set temperature, the control valve opens.

[0013] Optionally, it also includes a physical filtration module for toxic liquid wastewater, which sequentially connects the toxic liquid wastewater discharge pipe to the pH adjustment tank, the second membrane separation module, the second pathogen treatment module, and the second activated carbon treatment module. The outlet end of the second activated carbon treatment module is connected to the storage tank.

[0014] Optionally, it also includes a domestic sewage physical filtration module, which sequentially connects the domestic sewage discharge pipe to the MBR membrane reactor, the oxidation module, the third membrane separation module, the third activated carbon treatment module, and the third pathogen treatment module. The outlet end of the third pathogen treatment module is connected to the second recycled water tank.

[0015] Optionally, the first pathogen treatment module, the second pathogen treatment module, and the third pathogen treatment module are pathogen treatment modules with the same structure, and the pathogen treatment module is equipped with an ozone generator and an ultraviolet light irradiator.

[0016] Optionally, the first membrane separation module, the second membrane separation module, and the third membrane separation module are membrane separation modules with the same structure, and the membrane separation module is provided with an ultrafiltration membrane and a reverse osmosis membrane.

[0017] Optionally, a first drain pipe is provided between the first pathogen treatment module and the ship cooling circulation module. A first water quality monitor and a first return water pipe are provided on the first drain pipe. The outlet end of the first return water pipe is connected to the inlet end of the oil separator. A first return water valve is provided on the first return water pipe. The first return water valve is connected to the first water quality monitor for control.

[0018] Optionally, a second drain pipe is provided between the second activated carbon treatment module and the storage tank. A second water quality monitor and a second return water pipe are provided on the second drain pipe. The outlet end of the second return water pipe is connected to the inlet end of the pH adjustment tank. A second return water valve is provided on the second return water pipe. The second return water valve is connected to the second water quality monitor for control.

[0019] Optionally, a third drain pipe is provided between the third pathogen treatment module and the second recycled water tank. A third water quality monitor and a third return water pipe are provided on the third drain pipe. The outlet end of the third return water pipe is connected to the inlet end of the MBR membrane reactor. A third return water valve is provided on the third return water pipe, and the third return water valve is controlled and connected to the third water quality monitor.

[0020] Optionally, the first water quality monitor, the second water quality monitor, and the third water quality monitor may be the same water quality monitor.

[0021] This utility model provides a ship wastewater recycling system, the advantages of which are:

[0022] 1. This recycling system uses different treatment modules for different types of wastewater and recycles wastewater to different degrees according to the degree of pollution, ensuring the stability of the overall system.

[0023] 2. The different types of wastewater treatment modules in this recycling system are independent of each other, which avoids the mixing and pollution of different types of wastewater, improves the service life of the entire system, and facilitates future maintenance and management.

[0024] 3. This recycling system provides a new way to supply water for ships' daily use, reduces the number of times that need to be used to provide fresh water through seawater desalination, and reduces the overall energy consumption of ships.

[0025] 4. This recycling system treats oily wastewater generated on ships and applies it to the ship's cooling cycle, thereby improving the efficiency of the ship's cooling cycle.

[0026] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0027] The above and other objects, features and advantages of the present invention will become more apparent from the accompanying drawings, in which like reference numerals generally represent like parts.

[0028] Figure 1 A schematic diagram of a ship wastewater recycling system according to an embodiment of the present invention is shown.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Oily wastewater discharge pipe; 2. Oily wastewater physical filtration module; 3. Oil separator; 4. First membrane separation module; 5. First activated carbon treatment module; 6. First pathogen treatment module; 7. Cooling circulation pipeline; 8. First recycled water tank; 9. Temperature sensor; 10. Return water pipeline; 11. Toxic liquid wastewater discharge pipe; 12. Toxic liquid wastewater physical filtration module; 13. pH adjustment tank; 14. Second membrane separation module; 15. Second pathogen treatment module; 16. Second activated carbon treatment module ; 17. Storage tank; 18. Domestic sewage discharge pipe; 19. Domestic sewage physical filter module; 20. MBR membrane reactor; 21. Oxidation module; 22. Third membrane separation module; 23. Third activated carbon treatment module; 24. Third pathogen treatment module; 25. Second recycled water tank; 26. First drain pipe; 27. Water quality monitor; 28. First return water pipe; 29. ​​Second drain pipe; 30. Second return water pipe; 31. Third drain pipe; 32. Third return water pipe; 33. Filtration module. Detailed Implementation

[0031] Preferred embodiments of the present invention will now be described in more detail. While preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0032] This utility model provides a ship wastewater recycling system, comprising:

[0033] The oily wastewater physical filter module has its inlet end connected to the oily wastewater discharge pipe and its outlet end connected to the grease trap.

[0034] The inlet of the first membrane separation module is connected to the outlet of the oil separator, and the outlet of the first membrane separation module is connected to the first activated carbon treatment module.

[0035] The first pathogen treatment module is connected to the outlet end of the first activated carbon treatment module, and the outlet end of the first pathogen treatment module is connected to the ship cooling circulation module.

[0036] Specifically, this wastewater recycling system first passes the oily wastewater through a physical filtration module to remove insoluble impurities. Then, it undergoes preliminary treatment in an oil separator, intercepting large oil particles floating on the surface. The treated wastewater is then sent to a first membrane separation module for oil-water separation. Next, activated carbon is used to remove trace amounts of organic pollutants, heavy metal ions, odors, and pigments. Finally, a first pathogen treatment module treats pathogens in the wastewater. The treated oily wastewater can then enter the ship's cooling circulation module to dissipate heat and cool the ship's equipment.

[0037] The wastewater recycling system is simply installed on the hull, without any specific restrictions on its installation location. As long as the system can be connected to various wastewater discharge pipes, the ship's cooling water circulation system, and water storage tanks, it can treat and reuse the wastewater generated on board, and apply the treated wastewater to equipment circulation cooling and crew use.

[0038] Optionally, the ship cooling circulation module includes:

[0039] The cooling circulation pipeline is connected at its inlet end to the first pathogen treatment module;

[0040] The first return water tank has its inlet end connected to the outlet end of the cooling circulation pipeline. A temperature sensor is installed in the first return water tank, and heat sinks are installed on the first return water tank.

[0041] The outlet of the first recycled water tank is connected to the inlet of the cooling circulation pipeline through a control valve and a return water pipeline.

[0042] The control unit is connected to the temperature sensor and the control valve. When the temperature sensor detects that the liquid temperature in the first recycled water tank is lower than the set temperature, the control valve opens.

[0043] Specifically, the treated oily wastewater enters the cooling circulation pipeline, carrying away heat from the ship's equipment. After heat exchange, the wastewater enters the first recycled water tank, where heat is dissipated. When the temperature sensor detects that the wastewater temperature in the first recycled water tank has dropped below the set temperature, the control unit sends an opening signal to the control valve. In this way, the liquid in the first recycled water tank can re-enter the cooling circulation pipeline to cool the ship's equipment again.

[0044] Optionally, it also includes a physical filtration module for toxic liquid wastewater, which sequentially connects the toxic liquid wastewater discharge pipe to the pH adjustment tank, the second membrane separation module, the second pathogen treatment module, and the second activated carbon treatment module. The outlet end of the second activated carbon treatment module is connected to the storage tank.

[0045] Specifically, for toxic liquid wastewater generated on ships, it first passes through a physical filtration module to remove impurities that are not easily dissolved. Then, it passes through a pH tank to adjust the pH value of the wastewater, which can reduce the corrosion of the storage tank by the toxic liquid wastewater and thus improve the service life of the treatment system. Then, the wastewater passes through a second membrane separation module to remove dissolved toxins and colloidal substances. Next, it passes through a second pathogen treatment module to disinfect the wastewater. Finally, it passes through activated carbon filtration before being discharged into a dedicated storage tank for isolation.

[0046] Optionally, it also includes a domestic sewage physical filtration module, which connects the domestic sewage discharge pipe to the MBR membrane reactor, oxidation module, third membrane separation module, third activated carbon treatment module and third pathogen treatment module in sequence, and the outlet end of the third pathogen treatment module is connected to the second recycled water tank.

[0047] Specifically, for domestic sewage generated on ships, the system first removes insoluble impurities from the sewage through a physical sewage filtration module, which reduces the load on subsequent treatment. Then, the sewage passes through an MBR membrane reactor to degrade organic matter (COD, etc.) while retaining some bacteria and viruses, thereby reducing the suspended solids concentration in the effluent. Next, an oxidation module degrades and decomposes organic matter, and a third membrane separation module retains dissolved organic matter, inorganic salts, and other pollutants. Finally, a third activated carbon and a third pathogen treatment module remove trace amounts of organic pollutants, heavy metal ions, odors, pigments, and pathogens and viruses from the sewage. The treated domestic sewage is then discharged into a second recycled water tank for use in daily direct contact water applications on ships.

[0048] Optionally, the first, second, and third pathogen treatment modules are pathogen treatment modules with identical structures, and each pathogen treatment module is equipped with an ozone generator and an ultraviolet light irradiator.

[0049] Optionally, the first membrane separation module, the second membrane separation module, and the third membrane separation module are membrane separation modules with the same structure, and the membrane separation modules are provided with ultrafiltration membranes and reverse osmosis membranes.

[0050] Specifically, the three pathogen treatment modules for ship wastewater treatment all use the same structure, which reduces the operating cost of the treatment system. In these modules, ozone generated by an ozone generator disinfects, decomposes organic matter, and decolorizes and deodorizes the wastewater. Ultraviolet light irradiation further improves water quality. Similarly, the three membrane separation modules also use identical membrane separation modules, employing ultrafiltration and reverse osmosis membranes to remove dissolved toxins and colloidal substances from the wastewater.

[0051] Optionally, a first drain pipe is provided between the first pathogen treatment module and the ship cooling circulation module. A first water quality monitor and a first return water pipe are provided on the first drain pipe. The outlet end of the first return water pipe is connected to the inlet end of the oil separator. A first return water valve is provided on the first return water pipe. The first return water valve is connected to the first water quality monitor for control.

[0052] Specifically, after the wastewater on the ship is treated, it needs to be tested by the first water quality monitoring instrument. When the oily wastewater meets the standard for non-direct contact water for the ship, the treated wastewater can be sent to the ship's cooling circulation module. If the treated oily wastewater does not meet the standard, the wastewater needs to be sent back to the oil separator by opening the first return water valve for treatment again until the wastewater meets the standard.

[0053] Optionally, a second drain pipe is provided between the second activated carbon treatment module and the storage tank. A second water quality monitor and a second return water pipe are installed on the second drain pipe. The outlet end of the second return water pipe is connected to the inlet end of the pH adjustment tank. A second return water valve is installed on the second return water pipe and is connected to the control of the second water quality monitor.

[0054] Optionally, a third drain pipe is provided between the third pathogen treatment module and the second recycled water tank. A third water quality monitor and a third return water pipe are installed on the third drain pipe. The outlet end of the third return water pipe is connected to the inlet end of the MBR membrane reactor. A third return water valve is installed on the third return water pipe, and the third return water valve is connected to the control of the third water quality monitor.

[0055] Specifically, after treating toxic liquid wastewater and domestic sewage, the wastewater recycling system also needs to test the water quality standards using a water quality monitoring instrument. Only when the requirements are met can the wastewater be stored for future use. If the treated wastewater does not meet the water quality standards, it needs to be returned for reprocessing.

[0056] Optionally, the first water quality monitor, the second water quality monitor, and the third water quality monitor may be the same water quality monitor.

[0057] Specifically, the water quality monitoring instrument in this wastewater recycling system is an integrated water quality monitoring instrument, which can detect multiple indicators of the treated wastewater. Furthermore, the system can use a single water quality monitoring instrument to test the water quality of three types of wastewater after treatment, simplifying the system's structure.

[0058] Example

[0059] like Figure 1 As shown, this utility model provides a ship wastewater recycling system, comprising:

[0060] The inlet end of the oily wastewater physical filter module 2 is connected to the oily wastewater discharge pipe 1, and the outlet end of the oily wastewater physical filter module 2 is connected to the oil separator 3.

[0061] The inlet end of the first membrane separation module 4 is connected to the outlet end of the oil separator 3, and the outlet end of the first membrane separation module 4 is connected to the first activated carbon treatment module 5.

[0062] The first pathogen treatment module 6 is connected to the outlet end of the first activated carbon treatment module 5, and the outlet end of the first pathogen treatment module 6 is connected to the ship cooling circulation module.

[0063] In this embodiment, the ship cooling circulation module includes:

[0064] The inlet end of the cooling circulation pipe 7 is connected to the first pathogen treatment module 6;

[0065] The first recycled water tank 8 has its inlet end connected to the outlet end of the cooling circulation pipe 7. A temperature sensor 9 is installed in the first recycled water tank 8, and heat sinks are installed on the first recycled water tank 8.

[0066] The outlet of the first recycled water tank 8 is connected to the inlet of the cooling circulation pipe 7 through a control valve and a return water pipe 10.

[0067] The control unit is connected to the temperature sensor 9 and the control valve. When the temperature sensor 9 detects that the liquid temperature in the first recycled water tank 8 is lower than the set temperature, the control valve opens.

[0068] In this embodiment, a toxic liquid wastewater physical filtration module 12 is also included. The toxic liquid wastewater physical filtration module 12 connects the toxic liquid wastewater discharge pipe 11 to the pH adjustment tank 13, the second membrane separation module 14, the second pathogen treatment module 15, and the second activated carbon treatment module 16 in sequence. The outlet end of the second activated carbon treatment module 16 is connected to the storage tank 17.

[0069] In this embodiment, a domestic sewage physical filter module 19 is also included. The domestic sewage physical filter module 19 connects the domestic sewage discharge pipe 18 to the MBR membrane reactor 20, the oxidation module 21, the third membrane separation module 22, the third activated carbon treatment module 23 and the third pathogen treatment module 24 in sequence. The outlet end of the third pathogen treatment module 24 is connected to the second recycled water tank 25.

[0070] In this embodiment, the first pathogen treatment module 6, the second pathogen treatment module 15, and the third pathogen treatment module 24 are pathogen treatment modules with the same structure, and each pathogen treatment module is equipped with an ozone generator and an ultraviolet light irradiator.

[0071] In this embodiment, the first membrane separation module 4, the second membrane separation module 14, and the third membrane separation module 22 are membrane separation modules with the same structure, and the membrane separation modules are provided with ultrafiltration membranes and reverse osmosis membranes.

[0072] In this embodiment, a first drain pipe 26 is provided between the first pathogen treatment module 6 and the ship cooling circulation module. A water quality monitor 27 and a first return water pipe 28 are provided on the first drain pipe 26. The outlet end of the first return water pipe 28 is connected to the inlet end of the oil separator 3. A first return water valve is provided on the first return water pipe 28. The first return water valve is connected to the water quality monitor 27.

[0073] In this embodiment, a second drain pipe 29 is provided between the second activated carbon treatment module 16 and the storage tank 17. A water quality monitor 27 and a second return water pipe 30 are provided on the second drain pipe 29. The outlet end of the second return water pipe 30 is connected to the inlet end of the pH adjustment tank 13. A second return water valve is provided on the second return water pipe 30. The second return water valve is connected to the water quality monitor 27.

[0074] In this embodiment, a third drain pipe 31 is provided between the third pathogen treatment module 24 and the second recycled water tank 25. A water quality monitor 27 and a third return water pipe 32 are provided on the third drain pipe 31. The outlet end of the third return water pipe 32 is connected to the inlet end of the MBR membrane reactor 20. A third return water valve is provided on the third return water pipe 32. The third return water valve is connected to the water quality monitor 27.

[0075] In summary, for oily wastewater, this ship wastewater recycling system first removes insoluble impurities through the physical filtration module 2. Then, it preliminarily treats large floating oil particles on the surface of the wastewater through the grease trap 3, thus reducing the oil concentration. After treatment, the wastewater enters the first membrane separation module 4, which further purifies and filters the oil. Next, it passes through the first activated carbon treatment module 5 to remove trace amounts of organic pollutants, heavy metal ions, odors, and pigments. Finally, it passes through the first pathogen treatment module 6 to treat pathogens. The water quality monitor 27 monitors the water quality in real time to determine if it meets the water quality standards for the ship's cooling circulation module. If the water quality meets the standards, the water quality monitoring and management system opens the valve, and the treated, qualified wastewater enters the cooling circulation pipeline 7. After heat exchange, it enters the first recycled water tank 8. After the temperature drops to room temperature, it passes through the filtration module 33 and re-enters the cooling circulation pipeline 7 to cool the ship's equipment. If the standards are not met, the wastewater returns to the grease trap 3 for further treatment. In addition, for toxic liquid wastewater, the wastewater first passes through the toxic liquid wastewater physical filtration module 12 to remove impurities that are not easily dissolved. Then, it passes through the pH adjustment tank 13 to adjust the pH value of the wastewater, reducing the corrosion of the storage tank by the toxic liquid wastewater and improving the life of the treatment system. Next, it passes through the second membrane separation module 14 to remove dissolved toxins and colloidal substances from the wastewater. Then, it passes through the second pathogen treatment module 15 for disinfection. Finally, it passes through the second activated carbon treatment module 16 for filtration. The wastewater is then tested by the water quality monitoring instrument 27 according to the preset water quality standards. If the requirements are met, the valve is opened. If not, it is returned to the pH adjustment tank 13 for further re-treatment. After the treatment is qualified and meets the standards, it is discharged into the dedicated storage tank 17. For domestic sewage, the process begins with a physical filtration module 19 to remove insoluble impurities, reducing the load on subsequent treatments. Then, the sewage passes through an MBR membrane reactor 20 to degrade organic matter (COD, etc.) while retaining some bacteria and viruses, reducing the concentration of suspended solids in the effluent. Next, an oxidation module 21 degrades recalcitrant organic matter, followed by a third membrane separation module 22 to further retain dissolved organic matter, inorganic salts, and other pollutants. A third activated carbon treatment module 23 removes trace amounts of organic pollutants, heavy metal ions, odors, and pigments from the sewage. Finally, a third pathogen treatment module 24 treats pathogens and viruses in the sewage. A water quality monitor 27 determines whether the water quality meets the standards for non-direct contact water for ships by real-time monitoring of sewage data. If it meets the standards for direct contact water, the water quality monitoring and management system opens the valve, and the treated, qualified sewage is discharged to the second recycled water tank 25 for supplying water for daily direct contact water use on ships. If the standards are not met, the sewage is returned to the MBR membrane reactor 20 for further treatment.

[0076] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A ship's sewage recycling system, characterized by, include: The oily wastewater physical filter module has its inlet end connected to the oily wastewater discharge pipe, and its outlet end connected to the grease trap. The inlet of the first membrane separation module is connected to the outlet of the oil separator, and the outlet of the first membrane separation module is connected to the first activated carbon treatment module. The first pathogen treatment module is connected to the outlet end of the first activated carbon treatment module, and the outlet end of the first pathogen treatment module is connected to the ship cooling circulation module.

2. The ship wastewater recycling system of claim 1, wherein, The ship cooling circulation module includes: The cooling circulation pipeline is connected at its inlet end to the first pathogen treatment module. The first recycled water tank has its inlet end connected to the outlet end of the cooling circulation pipeline. A temperature sensor is installed in the first recycled water tank, and heat sinks are installed on the first recycled water tank. The outlet of the first recycled water tank is connected to the inlet of the cooling circulation pipeline via a control valve and a return water pipeline; The control unit is connected to the temperature sensor and the control valve. When the temperature sensor detects that the liquid temperature in the first recycled water tank is lower than the set temperature, the control valve opens.

3. The ship wastewater recycling system of claim 1, wherein, It also includes a physical filtration module for toxic liquid wastewater. The inlet end of the physical filtration module for toxic liquid wastewater is connected to the toxic liquid wastewater discharge pipe. The outlet end of the physical filtration module for toxic liquid wastewater is sequentially connected to a pH adjustment tank, a second membrane separation module, a second pathogen treatment module, and a second activated carbon treatment module. The outlet end of the second activated carbon treatment module is connected to a storage tank.

4. The ship wastewater recycling system of claim 3, wherein, It also includes a domestic sewage physical filtration module. The inlet end of the domestic sewage physical filtration module is connected to the domestic sewage discharge pipe. The outlet end of the domestic sewage physical filtration module is sequentially connected to an MBR membrane reactor, an oxidation module, a third membrane separation module, a third activated carbon treatment module, and a third pathogen treatment module. The outlet end of the third pathogen treatment module is connected to a second recycled water tank.

5. The ship wastewater recycling system of claim 4, wherein, The first pathogen treatment module, the second pathogen treatment module, and the third pathogen treatment module are pathogen treatment modules with the same structure, and each pathogen treatment module is equipped with an ozone generator and an ultraviolet light irradiator.

6. The ship wastewater recycling system according to claim 4, characterized in that, The first membrane separation module, the second membrane separation module, and the third membrane separation module are membrane separation modules with the same structure, and each membrane separation module is provided with an ultrafiltration membrane and a reverse osmosis membrane.

7. The ship wastewater recycling system according to claim 4, characterized in that, A first drain pipe is provided between the first pathogen treatment module and the ship cooling circulation module. A first water quality monitor and a first return water pipe are provided on the first drain pipe. The outlet end of the first return water pipe is connected to the inlet end of the oil separator. A first return water valve is provided on the first return water pipe. The first return water valve is connected to the first water quality monitor.

8. The ship wastewater recycling system according to claim 7, characterized in that, A second drain pipe is provided between the second activated carbon treatment module and the storage tank. A second water quality monitor and a second return water pipe are provided on the second drain pipe. The outlet end of the second return water pipe is connected to the inlet end of the pH adjustment tank. A second return water valve is provided on the second return water pipe. The second return water valve is connected to the control of the second water quality monitor.

9. The ship wastewater recycling system according to claim 8, characterized in that, A third drain pipe is provided between the third pathogen treatment module and the second recycled water tank. A third water quality monitor and a third return water pipe are installed on the third drain pipe. The outlet end of the third return water pipe is connected to the inlet end of the MBR membrane reactor. A third return water valve is installed on the third return water pipe, and the third return water valve is connected to the third water quality monitor for control.

10. The ship wastewater recycling system according to claim 9, characterized in that, The first water quality monitor, the second water quality monitor, and the third water quality monitor are the same water quality monitor.

Images