An integrated treatment device and treatment process method for shipboard kitchen waste and black / grey water

Abstract

The present invention discloses a comprehensive treatment device and treatment process method for shipboard food waste and black and gray water, including a black water vacuum pump station module, a screw press module, a regulating water tank module, a pressure dissolved air flotation module, and an electrocatalytic oxidation module. The discharged materials of the black water vacuum pump station module and the screw press module serve as the feed sources for the regulating water tank module. The regulating water tank module aerates, mixes, and stirs the sewage, and quantitatively regulates the sewage entering the pressure dissolved air flotation module. The pressure dissolved air flotation module separates the solid and liquid of the sewage, and its liquid phase enters the electrocatalytic oxidation module to degrade the organic matter in the sewage. In the present invention, the pressure dissolved air flotation module is the core module of the integrated treatment device. Since food waste wastewater and kitchen gray water are incorporated into the comprehensive treatment of black and gray water, which contains a large amount of animal and vegetable oils and suspended solids, if not pre-treated to the greatest extent possible, it will greatly affect the comprehensive treatment effect of the subsequent electrocatalytic oxidation treatment module. This module has excellent oil and mud removal effects.

Description

Technical Field

[0001] The present invention relates to the technical field of garbage and sewage treatment, and specifically refers to a comprehensive treatment device and treatment process method for ship's food waste and black and gray water. Background Art

[0002] With the development of the shipping industry and the increasing awareness of the public to protect the marine environment, the emission standards for ship water pollutants generated by shipboard personnel during production and life are getting higher and higher. For pollutants generated by personnel's life, such as food waste, domestic sewage, medical wastewater, kitchen gray water, washing gray water, etc., they need to be collected and treated in a timely manner to meet the discharge standards or be received through the shore connection after docking to ensure the ship's environmental safety and personnel health.

[0003] In the past twenty-odd years, independent equipment and corresponding technologies have been developed in China for collecting, treating, and discharging ship water pollutants such as food waste and domestic sewage up to the standards, and have achieved good development. Among them, the technical equipment for collecting and treating food waste is that in non-restricted areas, it is discharged directly to the outside of the ship after being crushed; in restricted areas, it is vacuum-collected after being ground and stored in a relatively large storage tank, or discharged to the sea after sailing to non-restricted areas to meet the international norms and national standards for discharge requirements, or received through the shore connection when arriving at the port. Its disadvantages are that a large vacuum tank is required on the ship to store the food waste after crushing and collection, occupying a large amount of ship space; secondly, for the domestic sewage treatment devices equipped on the ship, some only treat black water, and those developed in recent years can already treat black water and gray water. Among them, the vast majority of the equipment uses biochemical treatment technology, which is characterized by less energy consumption, but the disadvantage is that the equipment volume is large. When the number of personnel on the ship and the offshore engineering platform changes greatly, or when disinfectants are used to clean the toilet, it will greatly affect the ecological system in the equipment, resulting in unstable treated water quality or even exceeding the standards. There are also a small number of devices using electrolysis treatment technology. Due to the use of electrocoagulation treatment technology in electrolysis, a large flocculation sludge precipitation space needs to be set in the equipment, and at the same time, more electrocoagulation sludge will be generated, which is prone to secondary pollution. With the development trend that the international community requires that sludge cannot be directly discharged and a special tank needs to be set at the bottom of the cabin for storage, its disadvantages become more prominent.

[0004] In view of the above, it is necessary to propose a comprehensive treatment device and treatment process method for ship's food waste and black and gray water to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to solve the above technical problems and provide a comprehensive treatment device and treatment process method for ship's food waste and black and gray water.

[0006] To achieve the above object, the present invention adopts the following technical solutions: A comprehensive treatment device for ship's kitchen waste and black and grey water, comprising a black water vacuum pump station module, a spiral press module, an adjustment water tank module, a pressure dissolved air flotation module, and an electrocatalytic oxidation module. The discharges of the black water vacuum pump station module and the spiral press module serve as the feed sources for the adjustment water tank module. The adjustment water tank module aerates, mixes, and stirs the sewage, and quantitatively adjusts it to enter the pressure dissolved air flotation module. The pressure dissolved air flotation module separates the solid and liquid of the sewage, and its liquid phase enters the electrocatalytic oxidation module to degrade the organic matter in the sewage;

[0007] The spiral press module includes a mixing tank, an input pipe, a main body of the spiral assembly, a driving motor, a water storage tank, and a sludge discharge guide plate connected in sequence. The kitchen waste enters the mixing tank and is squeezed by the main body of the spiral assembly for solid-liquid separation. The separated kitchen waste wastewater enters the water storage tank, and the sludge is sent out by the sludge discharge guide plate;

[0008] The adjustment water tank module includes an adjustment water tank body, a gas supply unit, an aerator, and a drainage unit. The water storage tank is connected to the adjustment water tank body through a pipeline, and the sewage treated by aeration in the adjustment water tank module is sent to the pressure dissolved air flotation module through the drainage unit;

[0009] The pressure dissolved air flotation module includes an air flotation machine body, a flocculation unit, a dissolved air pump unit, a dissolved air tank unit, a sludge discharge pump unit, and a water collection unit. The end of the drainage unit is connected to the lower part of the air flotation machine body. The dissolved air pump unit inputs dissolved air water to the lower part of the air flotation machine body to combine with the solids in the sewage and make them float on the water surface. The sludge discharge unit is connected to the mixing tank, and the water collection unit serves as the water outlet end of the pressure dissolved air flotation module and is connected to the electrocatalytic oxidation module;

[0010] The electrocatalytic oxidation module includes a plurality of electrocatalytic oxidation components arranged in parallel. The water collection unit is connected to the plurality of electrocatalytic oxidation components through pipelines to continuously oxidize the sewage strongly to degrade the organic matter.

[0011] Further, the black water vacuum pump station module includes a vacuum pump and a vacuum pipe system; the vacuum pump collects and sends the black water into the adjustment water tank body through the vacuum pipe system, and flexible connectors are provided before and after the vacuum pump.

[0012] Further, the driving motor drives the spiral shaft in the main body of the spiral assembly to rotate. The kitchen waste flows from the mixing tank into the input pipe and is transported into the spiral assembly for concentration and extrusion, so that the sludge dehydration rate is not less than 75%.

[0013] Further, the gas supply unit is sequentially connected to the aerator at the bottom of the tank through an air pump, a ball valve, a check valve, a pressure gauge, and a stop valve through an air supply pipeline; the drainage unit is connected to the adjustment water tank body at the side bottom through a crushing pump; a liquid level interlock switch is provided on the adjustment water tank body.

[0014] Furthermore, inside the air flotation machine body, an air flotation contact zone, an air flotation separation zone, and a sludge collection zone are provided from bottom to top. A dissolved air release device is installed in the air flotation contact zone and is connected to a dissolved air tank outside the air flotation machine body via a pipeline.

[0015] The flocculation unit consists of a flocculation tank body and a stirring paddle with a stirring motor, and is connected to the air flotation machine body through a bottom pipeline. PAC and PAM coagulants are put into the flocculation tank body for mixing and then flow into the air flotation machine body by self-flow through the bottom.

[0016] The dissolved air pump unit is led out from the bottom side of the air flotation machine body through a pipeline and is connected to the side of the dissolved air tank through a dissolved air water pump.

[0017] The dissolved air tank unit consists of a dissolved air tank, an air compressor connected to the tank, a pressure gauge on the tank top, a safety valve, and a liquid level float switch on the tank body. The bottom pipeline of the dissolved air tank is connected to the dissolved air water pipe inside the air flotation machine body.

[0018] The outlet of the sludge collection zone at the top of the air flotation machine body is connected to the sludge discharge unit. The sludge discharge unit transports the sludge in the sludge collection zone to the mixing tank of the spiral press module through a sludge pump for further dehydration and drying.

[0019] A water collection tank is connected and arranged on the right side of the air flotation machine body and is connected to the air flotation machine body through a water collection pipe. The water collection pipe is arranged at the lower part inside the air flotation machine body. The water in the water collection tank overflows into the circulation water tank in the electro-catalytic oxidation module.

[0020] Furthermore, the electro-catalytic oxidation module further includes a circulation water tank, a circulation water conveying unit, a clean water tank, and a treated water drainage unit.

[0021] The circulation water tank and the clean water tank are in one box body separated by a partition into two chambers, and are arranged on the lower side of the electro-catalytic oxidation component. The side of the box body of the circulation water tank is provided with an inlet for pretreated sewage and wastewater, a seawater inlet and a ventilation port at the top. The bottom side of the circulation water tank is provided with a circulation water outlet connected to the circulation water conveying unit.

[0022] The circulation water conveying unit conveys the water in the circulation water tank to the electro-catalytic oxidation component by a circulation water pump. The outlet pipe of the electro-catalytic oxidation component is connected to the top of the clean water tank. A treated water discharge port is arranged at the bottom of the clean water tank and is connected to the treated water drainage unit.

[0023] Furthermore, ultraviolet lamp tubes are arranged in the clean water tank for photo-dechlorination of clean water. An exhaust gas concentration detection unit is arranged at the top of the clean water tank. A strong exhaust air pipeline is arranged on the clean water tank. The strong exhaust air pipeline includes an air supply pipe and an exhaust pipe. The starting end of the air supply pipe is connected to an air pump and the end is connected to the clean water tank. The exhaust pipe is connected to the top of the clean water tank. The exhaust gas concentration detection unit includes a combustible gas detector, and the combustible gas detector is arranged on the exhaust pipe.

[0024] Furthermore, a circulating water pump is provided in the treated water drainage unit, and the outlet end of the circulating water pump is provided with an outboard discharge pipeline and a shore connection pipeline in parallel.

[0025] A comprehensive treatment process method for shipboard food waste and black and grey water includes the following steps

[0026] S1: The black water is vacuum collected by the vacuum pump station module and then transported to the regulating water tank in the regulating water tank module for aeration treatment;

[0027] S2: The food waste and sludge enter the mixing tank in the screw press module and enter the main body of the screw assembly through the input pipe for dehydration. After that, the dried sludge is discharged and bagged through the sludge discharge guide plate, and the food waste wastewater falls into the water storage tank. The food waste wastewater flows into the regulating water tank body by itself and is aerated together with the sewage in S1;

[0028] S3: The food waste wastewater, vacuum collected black water, gravity collected black water, kitchen grey water, and black and grey water transferred from the black and grey water tank are pumped into the regulating water tank body. After the air source is provided by the air supply unit and aerated by the aerator, the food waste wastewater, black water, and grey water are fully mixed and homogenized, and then quantitatively transported to the pressure dissolved air flotation module through the drainage unit; The sewage enters the bottom side of the air flotation machine main body in the pressure dissolved air flotation module, and after reacting with the flocculants PAC and PAM flowing in from the flocculation unit, the raw water enters the combined air flotation contact area; The clear water is pressurized to 4.5 - 5 bar by the dissolved air water pump unit, and the gas is dissolved into the water to the maximum extent in the dissolved air tank to reach the saturated state. The formed pressure dissolved air water is decompressed and released through the dissolved air release device, generating a large number of fine bubbles. The fine bubbles fully contact the suspended flocs in the water in the air flotation contact area, causing the suspended flocs in the sewage to adhere to the micro bubbles and float to the water surface together with the bubbles. The floating sludge overflows to the sludge collection area through the openings on the partition board and is then sent to the screw press module by the sludge discharge pump. The pretreated water after the efficient solid-liquid separation in the air flotation is collected into the collection water tank through the collection water pipe, and the collection water pipe overflows to the electro-catalytic oxidation module;

[0029] S4: The pretreated sewage enters the electro-catalytic oxidation module for treatment. The electro-catalytic oxidation component directly degrades organic matter through the insoluble anode or degrades organic matter through intermediate substances such as hydroxyl radicals and hypochlorous acid generated by the anodic reaction with strong oxidation effects;

[0030] S5: Under emergency conditions, the inlet valve on the pressure dissolved air flotation module is closed, and the food waste wastewater and black and grey water are discharged emergently through the drainage unit at the bottom of the regulating water tank body and the overflow port on the clear water tank.

[0031] Compared with the prior art, the beneficial effects of the present invention are:

[0032] 1. The present invention collects black water under vacuum, dehydrates and removes solids from food waste through a spiral press, and mixes and slowly releases the peak value and equalizes the quantity of food waste wastewater and black ash water. The sewage and wastewater are efficiently pretreated by removing oil and mud through a pressurized air flotation module.

[0033] 2. The pressurized dissolved air flotation module in the present invention is one of the core modules of the integrated treatment device. Since food waste wastewater and kitchen ash water are incorporated into the comprehensive treatment of black ash water, which contains a large amount of animal and vegetable oils and suspended solids, if not pretreated to the greatest extent possible in advance, it will greatly affect the comprehensive treatment effect of the subsequent electrocatalytic oxidation treatment module. This module has an excellent effect of removing oil and mud.

[0034] 3. The spiral press module in the present invention can effectively dehydrate and remove solids from food waste and sludge. The sludge drying rate can reach 75%, greatly reducing the volume and weight, and at the same time avoiding the secondary pollution caused by fermentation during the storage of wet waste.

[0035] 4. The electrocatalytic oxidation module of the present invention is the core treatment process section of the integrated device. It uses the strong oxidation effects of direct oxidation and indirect oxidation to thoroughly degrade pollutants, and ensures that the residual chlorine in the clear water meets the standards through photolysis, without generating secondary pollution.

[0036] 5. The sewage and wastewater are further comprehensively treated by strong oxidation in the electrocatalytic oxidation module and photodechlorinated, so as to achieve the efficient comprehensive treatment of food waste and black ash water, and meet the standards for direct discharge overboard or shore connection reception.

[0037] 6. The integrated treatment device for food waste and black ash water of the present invention has outstanding advantages such as high modular integration, small floor area, less system sludge discharge, excellent treatment effect, good operation stability, and convenient operation and maintenance. It can be unaffected by changes in personnel on ships and offshore engineering platforms and the use of disinfectants for toilet flushing during toilet cleaning. Under the development trend that the international community pays more and more attention to preventing ship garbage and domestic sewage pollution, a comprehensive treatment device and a treatment process method are provided. Description of the Drawings

[0038] Figure 1 It is a flow chart of an integrated treatment device for shipboard food waste and black ash water of the present application;

[0039] In the figure: 100, black water vacuum pump station module; 101, vacuum pump unit one; 102, vacuum pump unit two; 103, vacuum pressure gauge; 104, vacuum pressure switch; 105, ball valve before the pump; 106, flexible connection pipe; 107, vacuum pump; 108, buffer tank; 109, ball valve after the pump;

[0040] 200, spiral press module; 201, mixing tank; 202, input pipe; 203, main body of the spiral assembly; 204, drive motor; 205, water storage tank; 206, sludge discharge guide plate;

[0041] 300, Adjustment water tank module; 301, Adjustment water tank body; 302, Air supply unit; 303, Liquid level float switch; 304, Aerator; 305, Drainage unit; 306, Air pump; 307, Crushing pump;

[0042] 400, Pressurized dissolved air flotation module; 401, Flotation machine body; 402, Flocculation unit; 403, Dissolved air pump unit; 404, Dissolved air tank unit; 405, Sludge discharge pump unit; 406, Water collection unit; 407, Flotation contact area; 408, Flotation separation area; 409, Sludge collection area; 410, Dissolved air release device; 411, Dissolved air tank; 412, Dissolved air water pump; 413, Dissolved air water pipe; 414, Sludge pump; 415, Water collection pipe;

[0043] 500, Electro-catalytic oxidation module; 501, Circulation water tank; 502, Electro-catalytic oxidation component; 503, Clean water tank; 504, Treated water drainage unit; 505, Circulation water pump; 506, Air supply pipe; 507, Exhaust pipe; 508, Combustible gas detector; 509, Ultraviolet lamp; 510, Discharge pump. Specific embodiments

[0044] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0045] This embodiment provides a comprehensive treatment device and treatment process method for kitchen waste and black and gray water. The comprehensive treatment device for kitchen waste and black and gray water includes a black water vacuum pump station module A, a spiral press module B, a sewage and wastewater mixing and adjusting water tank module C, a sewage and wastewater oil removal and sludge removal pretreatment pressurized dissolved air flotation module D, a sewage and wastewater strong oxidation comprehensive treatment electro-catalytic oxidation module E, and an electric control box F connected in sequence.

[0046] The black water vacuum pump station module 100 is composed of two vacuum pump units arranged in parallel, specifically including the first vacuum pump unit 101, the second vacuum pump unit 102 and the vacuum pipe system. The pressure real-time detection device of the vacuum pipe system includes a vacuum pressure gauge 103 and a vacuum pressure switch 104 for setting the working pressure. The vacuum pump unit is composed of a front-pump ball valve 105, a flexible connection pipe 106, a vacuum pump 107, a flexible connection pipe 106, a rear-pump ball valve 109 and a buffer tank 108 connected in sequence. The ball valve on the vacuum pump unit can be connected to the pipeline for pipeline flushing. The two groups of vacuum pump units are one in use and one in reserve, and can be used as backups for each other. The black water vacuum pump station module 100 is used to generate vacuum to collect and transport the black water to the regulation water tank module 300. The black water vacuum pump station module 100 is used for the vacuum collection of black water, which can directly reduce the gravity flushing water volume from 70L per person per day to 10L per person per day for vacuum flushing water volume, effectively saving water and energy. At the same time, the pipeline diameter can also be reduced, with good economy.

[0047] The screw press module 200 is composed of a mixing tank 201, an input pipe 202, a screw assembly main body 203, a driving motor 204, a water storage tank 205 and a sludge discharge guide plate 206 connected in sequence. The driving motor 204 drives the screw shaft in the screw assembly main body 203 to rotate. The kitchen waste flows from the mixing tank into the input pipe 202 and is transported into the screw assembly main body 203 for concentration and extrusion, so that the sludge dehydration rate is not less than 75%. The dried sludge is greatly reduced in volume and can be put into bags. The wastewater drops into the water storage tank 205 and flows to the regulation water tank body 301. The screw press module 200 can effectively dehydrate and remove solids from the kitchen waste and sludge. The sludge drying rate can reach 75%, greatly reducing the volume and weight, and at the same time avoiding the secondary pollution caused by the fermentation of wet waste storage.

[0048] The regulating water tank module 300 is composed of a regulating water tank body 301, kitchen waste water, black water, grey water inlets and vents on the tank top, an air supply unit 302, three low, medium and high liquid level float switches 303 (LS1, LS2, LS3) on the tank side, an aerator 304 on the bottom side of the tank body, and a drainage unit 305 on the bottom side of the tank body. The air supply unit 302 is connected to the aerator 304 at the bottom of the tank through an air supply pipeline, which is composed of an air pump 306, a ball valve BV7, a check valve RV1, a pressure gauge GPG1, and a stop valve GSV1. The air is supplied by the air pump AP1 and aerated through the aerator 304 to make the mixed sewage and wastewater roll and stir and mix fully. The drainage unit 305 is connected to the regulating water tank 301 at the side bottom, and is composed of a ball valve BV8 before the pump, a flexible pipe RC5, a crushing pump 307, a flexible pipe RC6, and a ball valve BV9 after the pump. The three liquid level float switches 303 (LS1, LS2, LS3) on the side of the tank control the automatic start and automatic shutdown of the crushing pump 307, and LS3 is activated to emit an audible and visual alarm when it is at a high level. The volume of the water tank 301 is adjusted to achieve the slow release of the peak value of the wastewater and output the homogenized wastewater to the water inlet of the pressurized dissolved air flotation module 400.

[0049] The pressurized dissolved air flotation module 400 is composed of a flotation machine body 401, a flocculation unit 402, a dissolved air pump unit 403, a dissolved air tank unit 404, a mud pump unit 405, and a water collection unit 406. Among them, the flotation machine body 401 is provided with an air flotation contact area 407, an air flotation separation area 408, and a mud collection area 409 from bottom to top. A dissolved air releaser 410 is installed in the flotation contact area 407 and is connected to the dissolved air tank 411 outside the flotation machine body 401 through a pipeline, which is used to input dissolved air water and release microbubbles. The flocculation unit 402 is composed of a flocculation tank body and a stirring paddle with a stirring motor, and is connected to the flotation machine body 401 through a bottom pipeline. Driven by the stirring motor D21, the stirring paddle shaft is driven to rotate slowly, and the PAC and PAM flocculation agents are fully mixed and flow into the flotation machine body D1 through the bottom. The dissolved air pump unit 403 is connected from the bottom side of the flotation machine body 401 through a pipeline, and is composed of a connected front-pump ball valve BV11, a flexible pipe RC7, a dissolved air water pump 412, a flexible pipe RC8, and a rear-pump ball valve BV12 in sequence, and is connected to the side of the dissolved air tank 411, and the clean water is pressurized by the dissolved air pump DAPA and then transported into the dissolved air tank 411.

[0050] The dissolved air tank unit 404 is successively composed of a dissolved air tank 411, an air compressor AP2 connected to the tank, a pressure gauge GPG2 on the tank top, a safety valve STV1, and a liquid level float switch LS7 on the tank body. It dissolves compressed air into the dissolved air water in the tank to the greatest extent and is connected to a dissolved air water pipe 413 in the dissolved air flotation machine body 401 through a pipeline at the bottom of the tank body. The outlet of the sludge collection area 409 at the top of the dissolved air flotation machine body 401 is connected to the sludge discharge unit 405, which is successively composed of a ball valve BV14 before the pump, a flexible joint RC9, a sludge pump 414, a flexible joint RC10, and a ball valve BV15 after the pump, and conveys the sludge in the sludge collection area to the mixing tank 201 of the screw press module 200 for further dehydration and drying. A water collection unit 406 is arranged on the right side of the dissolved air flotation machine body 401. A water collection pipe 415 in the water tank D61 is connected to the dissolved air flotation machine body 401. The water collection pipe 415 is arranged at the lower part in the dissolved air flotation machine body 401, accumulates the pretreated water with floating sludge and sinking water separated from the dissolved air flotation mud and water into the water tank D61, and overflows into the circulation water tank 501 in the electrocatalytic oxidation module 500 through a pipeline.

[0051] The electrocatalytic oxidation module 500 is composed of a circulating water tank 501, a circulating water delivery unit E2, an electrocatalytic oxidation component 502 (E3, E4, E5, E6) connected to a DC power supply by anode and cathode connecting cables, a clean water tank 503, and a treated water drainage unit 504. The circulating water tank 501 and the clean water tank 503 are a box body divided into two chambers by a partition, and are arranged on the lower side of the electrocatalytic oxidation components E3-E6. Among them, the circulating water tank 501 has a pre-treated sewage and wastewater inlet on the side of the box body, a seawater inlet and a vent on the top, and two low and middle liquid level float switches LS8 and LS9 on the side of the box body. The bottom side of the circulating water tank 501 is provided with a circulating water outlet connected to the circulating water delivery unit E2. The circulating water delivery unit is composed of the connected front-pump ball valve BV17, flexible pipe RC11, circulating water pump 505, flexible pipe RC12, and rear-pump ball valve BV18 ​​in sequence. The start and stop of the circulating water pump 505 are controlled by the low and medium liquid level float switches LS8 and LS9 for the delivery of circulating water. The outlet pipe of the circulating water delivery unit E2 is connected to the electrocatalytic oxidation components E3-E6. In order to ensure that the sewage and wastewater are strongly oxidized and comprehensively treated in the electrocatalytic oxidation components E3-E6 and the temperature rise is within the controlled range, the four groups of electrocatalytic oxidation components E3-E6 are connected in parallel, and ball valves BV19, BV20, BV21, and BV22 are provided on the water inlet pipe of the component, and ball valves BV26, BV25, BV24, and BV23 are provided on the outlet pipe. The pretreated sewage and wastewater are comprehensively treated by the electrocatalytic oxidation components E3-E6, and the various pollutants BOD5, COD, TSS, and heat-resistant Escherichia coli group indicators can meet the requirements, and the pH value of the water quality remains neutral. The residual chlorine index of the clean water here is high due to the presence of hypochlorous acid. The outlet pipe of the electrocatalytic oxidation component E3-E6 is connected to the top of the clean water tank 503 to collect the clean water into the clean water tank 503.

[0052] The clean water tank 503 is provided with a clean water input port and a strong exhaust pipeline, and the strong exhaust pipeline includes an air supply pipe 506 and an exhaust pipe 507. The start end of the air supply pipe 506 is connected to the air pump and the end end is connected to the clean water tank. The exhaust pipe 507 is connected to the top of the clean water tank. The exhaust gas concentration detection unit includes a combustible gas detector 508, and the combustible gas detector is arranged on the exhaust pipe 507. The combustible gas detector 508 is used to detect the combustible gas hydrogen concentration in the clean water tank in real time and feed it back to the control box. If the concentration value is lower than the set value, the exhaust is normally ventilated. If the concentration value is higher than the set value, the air supply is increased to strongly exhaust to reduce the concentration to ensure the safety of the cabin environment.

[0053] An overflow port is provided at the top side of the fresh water tank 503, and three liquid level float switches LS10, LS11, and LS12, namely low, medium, and high level switches, are arranged at the side part. An ultraviolet lamp 509 is arranged inside the fresh water tank 503 for photo-dechlorination of the fresh water. A treated water discharge port is arranged at the bottom of the fresh water tank 503 and is communicated with the treated water drainage unit 504. The treated water discharge unit 504 is successively composed of a ball valve BV27 before the pump, a flexible connecting pipe RC13, a discharge pump 510, a flexible connecting pipe RC14, and a ball valve BV28 after the pump. The start and stop of the treated water discharge pump DP1 and high-level alarm are controlled by the three liquid level switches LS10, LS11, and LS12 at low, medium, and high levels, so as to discharge the qualified treated water. The treated water can be directly discharged to the outside of the ship or can be connected to the shore for receiving.

[0054] The operation steps of the present invention are as follows:

[0055] S1: The black water is vacuum collected by the vacuum pump station module 100 and then conveyed into the regulating water tank body 301 of the regulating water tank module 300;

[0056] S2: The kitchen waste and sludge enter the mixing tank 201 in the screw press module 200 and flow into the input pipe 202. Driven by the drive motor 204, the kitchen waste and the sludge advance spirally along the spiral shaft in the spiral component main body 203 and are dehydrated. Then, the dried sludge is discharged and bagged through the sludge discharge guide plate 206, and the kitchen waste wastewater in the water storage tank 205 flows into the regulating water tank body 301 of the regulating water tank module 300 by itself;

[0057] S3: After the kitchen waste wastewater, vacuum-collected black water, gravity-collected black water, kitchen grey water, and black grey water transferred from the black grey water tank are pumped into the regulating water tank body 301, air source is provided by the air supply unit 302 and aeration is carried out through the aerator, so that the kitchen waste wastewater, black water, and grey water are fully mixed and homogenized, and then quantitatively transported to the pressurized dissolved air flotation module 400 through the drainage unit 305; The sewage and wastewater enter the bottom side of the air flotation machine main body 401 from the pressurized dissolved air flotation module 400, and after effective flocculation reaction with the flocculants PAC and PAM flowing in from the flocculation unit 402, the raw water enters the combined air flotation contact zone; The clear water is pressurized to 4.5 - 5 bar by the dissolved air water pump unit 403, and gas is dissolved into the water to the maximum extent in the dissolved air tank to reach a saturated state. The formed pressurized dissolved air water is decompressed and released through the dissolved air release device 410 to generate a large number of fine bubbles, which fully contact with the suspended flocs in the water in the air flotation contact zone, so that the suspended flocs in the sewage and wastewater adhere under the microbubbles and float to the water surface with the bubbles. The floating sludge overflows to the sludge collection area through the openings on the partition plate and is discharged externally. The pretreated water with high-efficiency solid-liquid separation effect (which can reduce BOD5, COD, TSS, chromaticity, etc. simultaneously) is collected into the collection water tank D61 through the collection pipe 415. Part of it is recycled for use by the air flotation machine main body 401, and the other part overflows from the collection water tank D61 to the electro-catalytic oxidation module 500. At this time, the water quality of the pretreated sewage and wastewater has been significantly improved and can meet the electro-catalytic oxidation pretreatment conditions.

[0058] S4: The pretreated sewage and wastewater are efficiently and comprehensively treated by the electro-catalytic oxidation module 500. The electro-catalytic oxidation component 502 directly degrades organic matter through an insoluble anode or hydroxyl radicals and intermediate substances such as hypochlorous acid produced by the anodic reaction to degrade organic matter, as well as a series of chemical reactions, electrochemical processes, or physical processes caused thereby, to achieve the purpose of pollutant degradation and transformation. This direct and indirect oxidation and degradation pathway makes the decomposition of organic matter more thorough. At the same time, the reactor equipment is relatively simple, occupies less space, is convenient for operation and maintenance, and can effectively avoid secondary pollution. The clear water after being strongly oxidized by the electro-catalytic oxidation component still needs to be dechlorinated by ultraviolet light in the clear water tank 503. The treated water after dechlorination meets the emission limit requirements of the International Maritime Organization (IMO) MPEC.227(64) resolution for various water quality indicators such as BOD5, COD, TSS, thermotolerant coliforms, pH, and residual chlorine, and is discharged up to standard through the treated water discharge unit E8. The electro-catalytic oxidation component

[0059] S5: Under emergency conditions, the inlet valve on the pressurized dissolved air flotation module 400 is shut down, and the kitchen waste wastewater and black grey water are discharged emergently through the drainage unit 305 at the bottom of the regulating water tank body and the overflow port of the clear water tank.

[0060] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes should be covered within the protection scope of the present invention.

Claims

1. An integrated treatment device for ship's galley waste and black grey water, characterized in that, It includes a black water vacuum pump station module, a screw press module, a regulating water tank module, a pressure dissolved air flotation module, and an electrocatalytic oxidation module. The discharged materials from the black water vacuum pump station module and the screw press module serve as the feed sources for the regulating water tank module. The regulating water tank module aerates, mixes, and stirs the sewage, and quantitatively regulates it to enter the pressure dissolved air flotation module. The pressure dissolved air flotation module separates the solid and liquid in the sewage, and its liquid phase enters the electrocatalytic oxidation module to degrade the organic matter in the sewage. The screw press module includes a mixing tank, an input pipe, a main body of the screw assembly, a driving motor, a water storage tank, and a sludge discharge guide plate connected in sequence. The kitchen waste enters the mixing tank and is squeezed by the main body of the screw assembly for solid-liquid separation. The separated kitchen waste wastewater enters the water storage tank, and the sludge is sent out by the sludge discharge guide plate. The regulating water tank module includes a regulating water tank body, a gas supply unit, an aerator, and a drainage unit. The water storage tank is connected to the regulating water tank body through a pipeline, and the sewage treated by aeration in the regulating water tank module is sent to the pressure dissolved air flotation module through the drainage unit. The pressure dissolved air flotation module includes a flotation machine body, a flocculation unit, a dissolved air pump unit, a dissolved air tank unit, a sludge discharge pump unit, and a water collection unit. The end of the drainage unit is connected to the lower part of the flotation machine body. The dissolved air pump unit inputs dissolved air water to the lower part of the flotation machine body to combine with the solids in the sewage and make them float on the water surface. The drainage unit is connected to the regulating water tank body at the side bottom through a crushing pump. The sludge discharge pump unit is connected to the mixing tank, and the water collection unit serves as the water outlet end of the pressure dissolved air flotation module and is connected to the electrocatalytic oxidation module. The electrocatalytic oxidation module includes a plurality of electrocatalytic oxidation components arranged in parallel. The water collection unit is connected to the plurality of electrocatalytic oxidation components through pipelines to continuously oxidize the sewage strongly to degrade the organic matter. Inside the flotation machine body, there are a flotation contact area, a flotation separation area, and a sludge collection area from bottom to top. A dissolved air release device is installed in the flotation contact area and is connected to the dissolved air tank outside the flotation machine body through a pipeline.

2. The integrated treatment device for ship's dining kitchen waste and black grey water according to claim 1, characterized in that, The black water vacuum pump station module includes a vacuum pump and a vacuum pipe system. The vacuum pump collects the black water through the vacuum pipe system and sends it into the regulating water tank body. Flexible connectors are provided before and after the vacuum pump.

3. The integrated treatment device for shipboard food waste and black grey water according to claim 1, wherein, The driving motor drives the screw shaft in the main body of the screw assembly to rotate. The kitchen waste flows from the mixing tank into the input pipe and is transported into the screw assembly for concentration and extrusion, so that the sludge dehydration rate is not less than 75%.

4. The integrated treatment device for shipboard food waste and black / grey water according to claim 1, characterized in that, The gas supply unit is sequentially connected to the aerator at the bottom of the tank through an air pump, a ball valve, a check valve, a pressure gauge, and a stop valve through a gas supply pipeline. A liquid level interlock switch is provided on the regulating water tank body.

5. The integrated treatment device for ship's dining kitchen waste and black grey water according to claim 1, characterized in that, The flocculation unit consists of a flocculation tank body and a stirring paddle with a stirring motor, and is connected to the flotation machine body through a bottom pipeline. PAC and PAM coagulants are put into the flocculation tank body for mixing and flow into the flotation machine body from the bottom automatically. The dissolved air pump unit is led out from the bottom side of the flotation machine body through a pipeline and is connected to the side of the dissolved air tank through a dissolved air water pump. The dissolved air tank unit consists of a dissolved air tank, an air compressor connected to the tank, a pressure gauge on the top of the tank, a safety valve, and a liquid level float switch on the tank body. The bottom pipeline of the dissolved air tank is connected to the dissolved air water pipe in the flotation machine body. The outlet of the sludge collection area at the top of the main body of the air flotation machine is connected to the sludge discharge pump unit, and the sludge discharge pump unit transports the sludge in the sludge collection area to the mixing tank of the spiral press module through a sludge pump for further dehydration and drying. A water collection tank is connected and arranged on the right side of the main body of the air flotation machine, and is connected to the main body of the air flotation machine through a water collection pipe. The water collection pipe is arranged at the lower part inside the main body of the air flotation machine, and the water in the water collection tank overflows into the circulating water tank in the electrocatalytic oxidation module.

6. The integrated treatment device for ship's dining kitchen waste and black grey water according to claim 4, characterized in that, The electrocatalytic oxidation module further includes a circulating water tank, a circulating water conveyance unit, a clean water tank, and a treated water drainage unit. The circulating water tank and the clean water tank are a single box body separated into two chambers by a partition, and are arranged on the lower side of the electrocatalytic oxidation assembly. The side of the box body of the circulating water tank is provided with an inlet for pretreated sewage and wastewater, a seawater inlet and a ventilation port at the top, and a circulating water outlet at the bottom side is connected to the circulating water conveyance unit. The circulating water conveyance unit transports the water in the circulating water tank to the electrocatalytic oxidation assembly by a circulating water pump; the outlet pipe of the electrocatalytic oxidation assembly is connected to the top of the clean water tank, and a treated water discharge port is arranged at the bottom of the clean water tank and is connected to the treated water drainage unit.

7. The integrated treatment device for shipboard food waste and black / grey water according to claim 6, characterized in that, Ultraviolet lamps are arranged in the clean water tank for photo-dechlorination of the clean water. An exhaust gas concentration detection unit is arranged at the top of the clean water tank. A strong exhaust air pipeline is arranged on the clean water tank. The strong exhaust air pipeline includes an air supply pipe and an exhaust pipe. The starting end of the air supply pipe is connected to an air pump and the ending end is connected to the clean water tank. The exhaust pipe is connected to the top of the clean water tank. The exhaust gas concentration detection unit includes a combustible gas detector, and the combustible gas detector is arranged on the exhaust pipe.

8. An integrated treatment device for ship's dining kitchen waste and black grey water according to claim 6, characterized in that, The treated water drainage unit is provided with a circulating water pump, and the outlet end of the circulating water pump is provided with a pipeline for discharging to the outside of the ship and a pipeline for discharging to the shore in parallel.

9. A comprehensive treatment process method for ship's catering kitchen waste and black and gray water, characterized in that, Including the following steps S1: The black water is vacuum-collected by the vacuum pump station module and then transported to the regulating water tank in the regulating water tank module for aeration treatment. S2: The kitchen waste and sludge enter the mixing tank in the spiral press module, and enter the main body of the spiral assembly through the input pipe for dehydration. After that, the dried sludge is discharged through the sludge discharge guide plate and bagged. The kitchen waste wastewater falls into the water storage tank, and the kitchen waste wastewater flows into the regulating water tank body by itself and is aerated together with the sewage in S1. S3: After the kitchen waste wastewater, vacuum-collected black water, gravity-collected black water, kitchen grey water, and black grey water transferred from the black grey water tank are pumped into the regulating water tank body, air source is provided by the air supply unit and aerated through the aerator, so that the kitchen waste wastewater, black water, and grey water are fully mixed and homogenized, and then quantitatively transported to the pressure dissolved air flotation module through the drainage unit; the sewage and wastewater enter the bottom side of the air flotation machine main body from the pressure dissolved air flotation module, and after effective flocculation reaction with the flocculants PAC and PAM flowing in from the flocculation unit, the raw water enters the combined air flotation contact area; the clear water is pressurized to 4.5 - 5 bar by the dissolved air water pump unit, and the gas is dissolved into the water to the maximum extent in the dissolved air tank to reach the saturated state. The formed pressure dissolved air water is decompressed and released through the dissolved air release device, generating a large number of fine bubbles. In the air flotation contact area, the fine bubbles fully contact with the suspended flocs in the water, so that the suspended flocs in the sewage and wastewater adhere to the microbubbles and float to the water surface together with the bubbles. The floating sludge overflows to the sludge collection area through the openings on the partition board and is then sent to the spiral press module by the sludge discharge pump. The pretreated water after the highly efficient solid-liquid separation by air flotation is collected into the collection water tank through the collecting pipe, and the collecting pipe overflows to the electrocatalytic oxidation module; S4: The pretreated sewage and wastewater enter the electrocatalytic oxidation module for treatment. The electrocatalytic oxidation component directly degrades organic matter through the insoluble anode or degrades organic matter through intermediate substances such as hydroxyl radicals and hypochlorous acid produced by the anodic reaction with strong oxidation effects; S5: Under emergency conditions, close the inlet valve on the pressure dissolved air flotation module, and the kitchen waste wastewater and black grey water are discharged emergently through the drainage unit at the bottom of the regulating water tank body and the overflow port on the clear water tank.

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