CN113800717A - Ship wastewater treatment device and treatment process thereof - Google Patents
Ship wastewater treatment device and treatment process thereof Download PDFInfo
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- CN113800717A CN113800717A CN202111127740.8A CN202111127740A CN113800717A CN 113800717 A CN113800717 A CN 113800717A CN 202111127740 A CN202111127740 A CN 202111127740A CN 113800717 A CN113800717 A CN 113800717A
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- 238000004065 wastewater treatment Methods 0.000 title claims abstract description 119
- 238000000034 method Methods 0.000 title claims description 19
- 230000008569 process Effects 0.000 title claims description 17
- 239000010802 sludge Substances 0.000 claims abstract description 175
- 239000010840 domestic wastewater Substances 0.000 claims abstract description 104
- 239000010865 sewage Substances 0.000 claims abstract description 72
- 239000002351 wastewater Substances 0.000 claims abstract description 66
- 239000007788 liquid Substances 0.000 claims abstract description 46
- 239000000203 mixture Substances 0.000 claims abstract description 27
- 239000000706 filtrate Substances 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 62
- 238000000354 decomposition reaction Methods 0.000 claims description 32
- 238000000926 separation method Methods 0.000 claims description 30
- 230000007246 mechanism Effects 0.000 claims description 28
- 230000001105 regulatory effect Effects 0.000 claims description 27
- 238000006243 chemical reaction Methods 0.000 claims description 22
- 238000001556 precipitation Methods 0.000 claims description 18
- 241001148470 aerobic bacillus Species 0.000 claims description 17
- 241001148471 unidentified anaerobic bacterium Species 0.000 claims description 16
- 238000004659 sterilization and disinfection Methods 0.000 claims description 15
- 230000018044 dehydration Effects 0.000 claims description 11
- 238000006297 dehydration reaction Methods 0.000 claims description 11
- 238000004062 sedimentation Methods 0.000 claims description 10
- 239000013049 sediment Substances 0.000 claims description 9
- 238000001914 filtration Methods 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 5
- 230000000249 desinfective effect Effects 0.000 claims description 3
- 239000013618 particulate matter Substances 0.000 claims description 3
- 239000002244 precipitate Substances 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 41
- 235000019198 oils Nutrition 0.000 description 41
- 239000000126 substance Substances 0.000 description 5
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- 238000004140 cleaning Methods 0.000 description 1
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- 231100001010 corrosive Toxicity 0.000 description 1
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- 239000004088 foaming agent Substances 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
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Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63J—AUXILIARIES ON VESSELS
- B63J4/00—Arrangements of installations for treating ballast water, waste water, sewage, sludge, or refuse, or for preventing environmental pollution not otherwise provided for
- B63J4/006—Arrangements of installations for treating ballast water, waste water, sewage, sludge, or refuse, or for preventing environmental pollution not otherwise provided for for treating waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/008—Originating from marine vessels, ships and boats, e.g. bilge water or ballast water
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/008—Mobile apparatus and plants, e.g. mounted on a vehicle
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/04—Flow arrangements
- C02F2301/046—Recirculation with an external loop
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Toxicology (AREA)
- Health & Medical Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention relates to a ship wastewater treatment device, which comprises: the oily wastewater treatment module is used for separating oily wastewater into floating oil, lower-layer sewage and materialized sludge; the domestic wastewater treatment module is used for separating domestic wastewater into biochemical sludge and standard-reaching wastewater; the sludge dewatering module is used for dewatering the mixture of the materialized sludge, the biochemical sludge and the floating oil liquid into a dry sludge cake and a filtrate; the ship wastewater treatment device has the advantages of low energy consumption, stable equipment effluent quality, small equipment occupied area, high treatment efficiency and low investment cost.
Description
Technical Field
The invention relates to the technical field of wastewater treatment equipment and processes, in particular to a ship wastewater treatment device and a treatment process thereof.
Background
A large amount of domestic sewage and ship oily water can be produced when a ship sails on water, the sewage can not be directly discharged into the environment, and the sewage can be discharged into the environment only after reaching the standard meeting the index requirement after being subjected to special treatment. Because the ship needs to be in a relatively independent environment for a long time in the transportation process, the sewage on the ship is stored by using a water storage tank or is discharged into the environment after being treated by using sewage treatment equipment.
The existing ship sewage treatment equipment usually mixes domestic sewage and ship oily sewage together and then adopts the traditional biochemical process for treatment. However, the quality of the sewage often fluctuates, which directly affects the biochemical effect, so that the effluent indexes of subsequent equipment are often unqualified and need to be returned for retreatment, and therefore, the treatment process has the problems of high operating cost, inconvenient operation, substandard treatment effect and the like; even further treatment of the wastewater by subsequent equipment is required.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a ship wastewater treatment device and a treatment process thereof, which are used for solving the problems of high operation cost and inconvenient operation of the conventional ship wastewater treatment process.
The technical purpose of the invention is realized by the following technical scheme:
a marine wastewater treatment plant comprising: the oily wastewater treatment module is used for separating oily wastewater into floating oil, lower-layer sewage and materialized sludge; the domestic wastewater treatment module is used for separating domestic wastewater into biochemical sludge and standard-reaching wastewater; the sludge dewatering module is used for dewatering the mixture of the materialized sludge, the biochemical sludge and the floating oil liquid into a dry sludge cake and a filtrate; the first input end of the oily wastewater treatment module, which is used for receiving oily wastewater, is communicated with an oily wastewater discharge port; a first output end of the oily wastewater treatment module, which is used for outputting floating oil, is communicated with a first input end of the sludge dewatering module; a second output end of the oily wastewater treatment module, which is used for outputting materialized sludge, is communicated with a second input end of the sludge dehydration module; a third output end of the oily wastewater treatment module, which is used for outputting lower-layer sewage, is communicated with the first input end of the domestic wastewater treatment module; a second input end of the domestic wastewater treatment module, which is used for receiving domestic wastewater, is communicated with the domestic wastewater discharge port; a first output end of the domestic wastewater treatment module for outputting biochemical sludge is communicated with a third input end of the sludge dewatering module; a second output end of the domestic wastewater treatment module, which is used for outputting standard-reaching wastewater, is communicated with a standard-reaching wastewater discharge port; a first output end of the sludge dewatering module, which is used for outputting filtrate, is communicated with a second input end of the oily wastewater treatment module; the sludge dewatering module further comprises a second output end for producing a dry sludge cake.
Optionally, the oily wastewater treatment module comprises: the device comprises a collecting tank for collecting oily wastewater, a separating device for carrying out oil-water separation on the oily wastewater to generate floating oil and bottom layer separating liquid, a physicochemical reaction device for carrying out physicochemical reaction on the bottom layer separating liquid to generate lower layer sewage and sediment, and a precipitation device for separating the lower layer sewage and the sediment; the first input end of the water collecting tank is communicated with an oil-containing wastewater discharge port; the second input end of the water collecting tank is communicated with the first output end of the sludge dewatering module; the output end of the water collecting tank is communicated with the input end of the separation device; a first output end of the separation device for outputting floating oil liquid is communicated with a first input end of the sludge dewatering module; a second output end of the separation device for outputting the floating oil liquid is communicated with the input end of the physicochemical reaction device; the output end of the physicochemical reaction device is communicated with the input end of the precipitation device; a first output end of the sedimentation device for outputting the materialized sludge is communicated with a second input end of the sludge dewatering module; and a second output end of the sedimentation device, which is used for outputting the lower-layer sewage, is communicated with a first input end of the domestic wastewater treatment module.
Optionally, the oily wastewater treatment module further comprises: the delivery pump is used for accelerating the flow of the oily wastewater in the collecting tank; the input end of the delivery pump is communicated with the output end of the water collecting tank; and the output end of the delivery pump is communicated with the input end of the separation device.
Optionally, the domestic wastewater treatment module comprises: the domestic sewage treatment system comprises a regulating tank for collecting domestic wastewater, a biochemical treatment device for biologically decomposing the domestic wastewater, a CS treatment device for performing inclined plate precipitation treatment on the biochemically treated domestic wastewater, and a disinfection device for disinfecting the precipitated domestic sewage; the first input end of the regulating tank is communicated with the domestic wastewater discharge port; the second input end of the regulating tank is communicated with the third output end of the oily wastewater treatment module, which is used for outputting lower-layer sewage; the output end of the regulating tank is communicated with the input end of the biochemical treatment device; the output end of the biochemical treatment device is communicated with the input end of the CS treatment device; a first output end of the CS treatment device for outputting biochemical sludge is connected with an input end of the disinfection device; a second output end of the CS treatment device for outputting biochemical sludge is connected with a third input end of the sludge dewatering module; the output end of the disinfection device is communicated with the standard-reaching wastewater discharge port.
Optionally, the domestic wastewater treatment module further comprises: a lift pump and a grid well for filtering particulate matter and fibrous matter in the domestic wastewater; the input end of the grid well is communicated with the domestic wastewater discharge port; the output end of the grid well is communicated with the first input end of the regulating pool; the input end of the lifting water pump is communicated with the output end of the regulating tank; the output end of the lifting water pump is communicated with the input end of the biochemical treatment device.
Optionally, the biochemical treatment device comprises an aerobic bacteria decomposition mechanism, an anaerobic bacteria decomposition mechanism and a circulating water pump for decomposing the domestic wastewater for multiple times; the first input end of the aerobic bacteria decomposition mechanism is communicated with the output end of the regulating tank; the second input end of the aerobic bacteria decomposition mechanism is communicated with the output end of the circulating water pump; the first input end of the anaerobic bacteria decomposition mechanism is communicated with the output end of the aerobic bacteria decomposition mechanism; and the first output end of the anaerobic bacteria decomposition mechanism is communicated with the input end of the CS treatment device, and the second output end of the anaerobic bacteria decomposition mechanism is communicated with the input end of the circulating water pump.
Optionally, the sludge dewatering module includes: a sludge concentration tank, a sludge delivery pump and a dewatering device; the first input end of the sludge concentration tank is communicated with the first output end of the oily wastewater treatment module; the second input end of the sludge concentration tank is communicated with the second output end of the oily wastewater treatment module; the third input end of the sludge concentration tank is communicated with the first output end of the domestic wastewater treatment module; the output end of the sludge concentration tank is connected with the input end of the sludge delivery pump, the output end of the sludge delivery pump is communicated with the input end of the dehydration device, and the first output end of the dehydration device is communicated with the second input end of the oily wastewater treatment module; the dewatering device is also provided with a second output end for outputting the dry mud cake.
The invention also provides a ship wastewater treatment process using the ship wastewater treatment device, which comprises the following steps:
s1, separating the oily wastewater into oil slick liquid, materialized sludge and lower-layer sewage by using the oily wastewater treatment module, conveying the oil slick liquid and the materialized sludge into the sludge dehydration module, and conveying the lower-layer sewage into the domestic wastewater treatment module;
s2, separating the domestic wastewater into standard wastewater and biochemical sludge by using the domestic wastewater treatment module; conveying the biochemical sludge into the sludge dewatering module, and discharging the standard-reaching wastewater into the environment;
s3, collecting the mixture of the materialized sludge, the biochemical sludge and the floating oil liquid by using the sludge concentration tank;
s4, conveying the mixture in the sludge concentration tank to the dewatering device through the sludge conveying pump to generate a dry sludge cake and a filtrate;
s5, the dry mud cake is sent to be buried; and conveying the filtrate back to the collecting tank for treatment again.
Optionally, the step S1 includes:
s11, collecting the oily sewage and filtrate by using the collecting tank;
s12, conveying the mixture in the collecting tank to a separation device by using the conveying pump to be separated into floating oil liquid and bottom layer separation liquid;
s13, conveying the oil slick liquid into the sludge concentration tank, conveying the bottom layer separation liquid into the physicochemical reaction device, and separating suspended matters in the bottom layer separation liquid through a physical and chemical reaction;
s14, inputting the bottom layer separation liquid with suspended matters into a precipitation device for precipitation treatment to obtain precipitates and lower layer sewage;
s15, inputting the sediment into the sludge concentration tank, and inputting the lower layer sewage into the domestic wastewater treatment module.
Optionally, the step S2 includes:
s21, filtering particulate matters and fibrous matters in domestic wastewater and lower-layer sewage by using the grid well;
s22, collecting the mixture of the filtered domestic wastewater and the lower-layer sewage by using the regulating tank;
s23, conveying the mixture of the domestic wastewater and the lower-layer sewage in the regulating reservoir to the biochemical treatment device by using the lifting water pump;
s24, circulating the mixture of the domestic wastewater and the lower-layer sewage in the biochemical treatment device for multiple times through the circulating water pump so as to fully decompose the aerobic bacteria decomposition mechanism and the anaerobic bacteria decomposition mechanism;
s25, conveying the mixture of the domestic wastewater subjected to biochemical treatment and the lower-layer sewage into the CS treatment device for inclined plate precipitation treatment to generate biochemical sludge and standard-reaching wastewater;
s26, conveying the biochemical sludge to the sludge collection tank for collection; conveying the standard-reaching wastewater into a disinfection device for disinfection;
s27, discharging the disinfected wastewater reaching the standard.
In conclusion, the invention has the following beneficial effects: the application provides a boats and ships effluent treatment plant includes: the oily wastewater treatment module is used for separating oily wastewater into floating oil, lower-layer sewage and materialized sludge; the domestic wastewater treatment module is used for separating domestic wastewater into biochemical sludge and standard-reaching wastewater; the sludge dewatering module is used for dewatering the mixture of the materialized sludge, the biochemical sludge and the floating oil liquid into a dry sludge cake and a filtrate; the first input end of the oily wastewater treatment module, which is used for receiving oily wastewater, is communicated with an oily wastewater discharge port; a first output end of the oily wastewater treatment module, which is used for outputting floating oil, is communicated with a first input end of the sludge dewatering module; a second output end of the oily wastewater treatment module, which is used for outputting materialized sludge, is communicated with a second input end of the sludge dehydration module; a third output end of the oily wastewater treatment module, which is used for outputting lower-layer sewage, is communicated with the first input end of the domestic wastewater treatment module; a second input end of the domestic wastewater treatment module, which is used for receiving domestic wastewater, is communicated with the domestic wastewater discharge port; a first output end of the domestic wastewater treatment module for outputting biochemical sludge is communicated with a third input end of the sludge dewatering module; a second output end of the domestic wastewater treatment module, which is used for outputting standard-reaching wastewater, is communicated with a standard-reaching wastewater discharge port; a first output end of the sludge dewatering module, which is used for outputting filtrate, is communicated with a second input end of the oily wastewater treatment module; the sludge dewatering module also comprises a second output end for producing a dry sludge cake; the invention can classify and dispose the waste water produced by the ship, avoid the waste water treatment from not reaching the standard due to the change of the content of the components in the water, and compared with the traditional evaporation concentration treatment, the device of the invention has the advantages of low energy consumption, stable water quality of the effluent of the equipment, small occupied area of the equipment, high treatment efficiency and low investment cost.
Drawings
FIG. 1 is a schematic view of a treatment apparatus of the present invention;
FIG. 2 is a flow diagram of the treatment process of the present invention;
in the figure: 1. an oily wastewater treatment module; 11. an oily wastewater discharge port; 12. a water collecting tank; 13. a delivery pump; 14. a separation device; 15. a physicochemical reaction device; 16. a precipitation device; 2. a domestic wastewater treatment module; 21. a domestic wastewater discharge port; 22. a grid well; 23. a regulating tank; 24. lifting the water pump; 25. a biochemical treatment device; 26. a CS processing device; 27. a sterilizing device; 3. a sludge dewatering module; 31. a sludge concentration tank; 32. a sludge delivery pump; 33. a dewatering device; 34. a second output terminal; .
Detailed Description
In order to make the objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. Several embodiments of the invention are presented in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations. The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature. The terms "vertical," "horizontal," "left," "right," "up," "down," and the like are used for descriptive purposes only and are not intended to indicate or imply that the referenced devices or elements must be in a particular orientation, configuration, and operation, and therefore should not be construed as limiting the present invention.
The invention is described in detail below with reference to the figures and examples.
Referring to fig. 1 and 2 together, the present invention provides a ship wastewater treatment apparatus including:
an oily wastewater treatment module 1 for separating oily wastewater into floating oil, lower layer sewage and materialized sludge;
a domestic wastewater treatment module 2 for separating domestic wastewater into biochemical sludge and standard-reaching wastewater;
a sludge dewatering module 3 for dewatering the mixture of materialized sludge, biochemical sludge and floating oil liquid into a dry sludge cake and filtrate;
a first input end of the oily wastewater treatment module 1 for receiving oily wastewater is communicated with an oily wastewater discharge port 11; a first output end of the oily wastewater treatment module 1 for outputting floating oil is communicated with a first input end of the sludge dewatering module 3; a second output end 34 of the oily wastewater treatment module 1 for outputting materialized sludge is communicated with a second input end of the sludge dewatering module 3; a third output end of the oily wastewater treatment module 1 for outputting lower-layer sewage is communicated with a first input end of the domestic wastewater treatment module 2; a second input end of the domestic wastewater treatment module 2 for receiving domestic wastewater is communicated with a domestic wastewater discharge port 21; a first output end of the domestic wastewater treatment module 2 for outputting biochemical sludge is communicated with a third input end of the sludge dewatering module 3; a second output end 34 of the domestic wastewater treatment module 2 for outputting standard-reaching wastewater is communicated with a standard-reaching wastewater discharge port; a first output end of the sludge dewatering module 3 for outputting filtrate is communicated with a second input end of the oily wastewater treatment module 1; the sludge dewatering module 3 further comprises a second output 34 for producing a dry sludge cake.
In particular, the main waste in the domestic wastewater comes from the discharge and other waste of toilets and urinals, as well as medical offices, kitchens, laundries and toilets, etc.; the pollution load is higher because the ship sanitation system has a shorter discharge cycle and discharges much fresher (less decomposed) sewage than the urban drainage system. Moreover, the quality and the quantity of the discharged water are greatly changed due to the centralization of personnel, so that higher requirements are put forward for the wastewater treatment process. After the oily waste water (especially floating oil) is discharged into water body, a layer of very thin oil film can be formed on the surface of water body, according to the introduction of information, 1t of oil product is discharged to water surface, and then the oil film pollution of 5 x 106m2 can be formed. The oil film directly hinders the transfer of oxygen in the atmosphere to the water body, so that the water body is anoxic, and aquatic animals die due to the anoxic. The oily water discharged by the ship mainly comprises bilge oily water, ballast oily water generated by a fuel oil tank or an oil tanker and tank washing oily water generated during mechanical cleaning, and is commonly called as 'three-water'. The oil-contaminated water contains not only petroleum and petroleum products but also solid suspended substances and the like, and is a mixture of fresh water and seawater containing pollutants. Typical contaminants include fuels, oils, hydraulic fluids, detergents and water-bearing films, foaming Agents (AFFF), black water/grey water system sewage leaks, etc., and may also include corrosives such as paints and solvents, etc. In summary, the oily wastewater and the domestic wastewater are separated, oil substances in the oily wastewater are separated, and suspended matters in the bottom layer sewage pass through the physicochemical reaction device 15 to generate materialized sludge and lower layer sewage; merging the domestic wastewater and the lower-layer sewage from which the suspended matters are removed to generate dischargeable sewage and biochemical sludge, wherein the content index of components in the discharged sewage meets the discharge standard; materialized sludge containing a large amount of oil pollutants, biochemical sludge and floating oil liquid are dehydrated through the sludge dehydration module 3 to generate dry sludge cakes, and the dry sludge cakes are transported outside for treatment.
Further, the oily wastewater treatment module 1 includes: a collecting tank 12 for collecting the oily wastewater, a separating device 14 for separating oil from water in the oily wastewater to generate floating oil and bottom layer separating liquid, a physicochemical reaction device 15 for generating lower layer sewage and sediment by performing a physicochemical reaction in the bottom layer separating liquid, and a precipitation device 16 for separating the lower layer sewage and sediment; a first input end of the water collecting tank 12 is communicated with an oil-containing wastewater discharge port 11; a second input end of the water collecting tank 12 is communicated with a first output end of the sludge dewatering module 3 (namely, a first output end of the dewatering device 33); the output end of the water collecting tank 12 is communicated with the input end of the separating device 14; a first output end of the separation device 14 for outputting floating oil liquid is communicated with a first input end of the sludge dewatering module 3 (namely a first input end of the sludge thickener 31); the second output end 34 of the separation device 14 for outputting the floating oil liquid is communicated with the input end of the physicochemical reaction device 15; the output end of the physicochemical reaction device 15 is communicated with the input end of the precipitation device 16; a first output end of the sedimentation device 16 for outputting materialized sludge is communicated with a second input end of the sludge dewatering module 3 (namely, a second input end of the sludge concentration tank 31); the second output end 34 of the settling device 16 for outputting the lower layer sewage is communicated with the first input end of the domestic wastewater treatment module 2.
Further, the oily wastewater treatment module 1 further comprises: a delivery pump 13 for accelerating the flow of the oily wastewater in the collecting tank 12; the input end of the delivery pump 13 is communicated with the output end of the water collecting tank 12; the output end of the delivery pump 13 is communicated with the input end of the separation device 14.
Further, the domestic wastewater treatment module 2 comprises: a regulating tank 23 for collecting domestic wastewater, a biochemical treatment device 25 for biologically decomposing the domestic wastewater, a CS treatment device 26 for performing inclined plate sedimentation treatment on the domestic wastewater after the biochemical treatment, and a disinfection device 27 for disinfecting the domestic wastewater after the sedimentation; a first input end of the regulating tank 23 is communicated with the domestic wastewater discharge port 21; a second input end of the regulating tank 23 is communicated with a third output end of the oily wastewater treatment module 1 (namely, a second output end 34 of the sedimentation device 16) for outputting lower-layer sewage; the output end of the regulating tank 23 is communicated with the input end of the biochemical treatment device 25; the output end of the biochemical treatment device 25 is communicated with the input end of the CS treatment device 26; a first output end of the CS treatment device 26 for outputting biochemical sludge is connected with an input end of the disinfection device 27; a second output end 34 of the CS processing device 26 for outputting biochemical sludge is connected with a third input end of the sludge dewatering module 3; the output end of the disinfection device 27 is communicated with the standard wastewater discharge port.
Further, the domestic wastewater treatment module 2 further comprises: a lift pump 24 and a grid well 22 for filtering particulate matter and fibrous matter in the domestic wastewater; the input end of the grid well 22 is communicated with the domestic wastewater discharge port 21; the output end of the grid well 22 is communicated with the first input end of the regulating pool 23; the input end of the lifting water pump 24 is communicated with the output end of the regulating tank 23; the output end of the lift water pump 24 is communicated with the input end of the biochemical treatment device 25. The grid well 22 is used for filtering fibrous substances and particles in the domestic wastewater, and prevents the fibrous substances and the particles from blocking the pipeline in the conveying process.
Further, the biochemical treatment device 25 comprises an aerobic bacteria decomposition mechanism, an anaerobic bacteria decomposition mechanism and a circulating water pump for decomposing the domestic wastewater for multiple times; the first input end of the aerobic bacteria decomposition mechanism is communicated with the output end of the regulating tank 23; the second input end of the aerobic bacteria decomposition mechanism is communicated with the output end of the circulating water pump; the first input end of the anaerobic bacteria decomposition mechanism is communicated with the output end of the aerobic bacteria decomposition mechanism; the first output end of the anaerobic bacteria decomposition mechanism is communicated with the input end of the CS treatment device 26, and the second output end 34 of the anaerobic bacteria decomposition mechanism is communicated with the input end of the circulating water pump. Through circulating water pump can let be located sewage among the biochemical treatment device 25 carries out the circulation reaction, lets sewage and aerobic bacteria and anaerobe fully contact, lets the abundant decomposition of filth in aquatic.
Further, the sludge dewatering module 3 includes: a sludge concentration tank 31, a sludge transfer pump 3213, and a dewatering device 33; a first input end of the sludge concentration tank 31 is communicated with a first output end of the oily wastewater treatment module 1 (namely, a first output end of the separation device 14 for outputting floating oil liquid); a second input end of the sludge concentration tank 31 is communicated with a second output end 34 of the oily wastewater treatment module 1 (namely, a first output end of the sedimentation device 16 for outputting materialized sludge); a third input end of the sludge concentration tank 31 is communicated with a first output end of the domestic wastewater treatment module 2 (namely, a second output end 34 of the CS treatment device 26 for outputting biochemical sludge); the output end of the sludge concentration tank 31 is connected with the input end of the sludge delivery pump 3213, the output end of the sludge delivery pump 3213 is communicated with the input end of the dewatering device 33, and the first output end of the dewatering device 33 is communicated with the second input end of the oily wastewater treatment module 1 (i.e., the second input end of the water collecting tank 12); the dewatering device 33 is further provided with a second output 34 for outputting the dried mud cake.
Further, the invention also provides a ship wastewater treatment process using the ship wastewater treatment device, which comprises the following steps:
s1, separating the oily wastewater into oil slick liquid, materialized sludge and lower-layer sewage by using the oily wastewater treatment module 1, conveying the oil slick liquid and the materialized sludge into the sludge dehydration module 3, and conveying the lower-layer sewage into the domestic wastewater treatment module 2;
specifically, the present step S1 mainly includes the following steps S11-S15:
s11, collecting the oily sewage and the filtrate by using the collecting tank 12;
s12, conveying the mixture in the collecting tank 12 to a separation device 14 by using the conveying pump 13 to be separated into floating oil liquid and bottom layer separation liquid;
s13, conveying the oil slick liquid into the sludge concentration tank 31, conveying the bottom layer separation liquid into the physicochemical reaction device 15, and separating suspended matters in the bottom layer separation liquid through physical and chemical reactions;
s14, inputting the bottom layer separation liquid with suspended matters into a precipitation device 16 for precipitation treatment to obtain precipitates and lower layer sewage;
s15, inputting the sediment into the sludge concentration tank 31, and inputting the lower layer sewage into the domestic wastewater treatment module 2;
s2, separating the domestic wastewater into standard wastewater and biochemical sludge by using the domestic wastewater treatment module 2; the biochemical sludge is conveyed into the sludge dewatering module 3, and the standard-reaching wastewater is discharged into the environment;
specifically, the present step S2 mainly includes the following steps S21-S27:
s21, filtering particulate matters and fibrous matters in the domestic wastewater and the lower layer sewage by using the grid wells 22;
s22, collecting the mixture of the filtered domestic wastewater and the lower-layer sewage by using the adjusting tank 23;
s23, conveying the mixture of the domestic wastewater and the lower-layer sewage in the regulating reservoir to the biochemical treatment device 25 by using the lifting water pump 24;
s24, circulating the mixture of the domestic wastewater and the lower-layer sewage in the biochemical treatment device 25 for multiple times through the circulating water pump so as to fully decompose the aerobic bacteria decomposition mechanism and the anaerobic bacteria decomposition mechanism;
s25, conveying the mixture of the domestic wastewater subjected to biochemical treatment and the lower-layer sewage into the CS treatment device 26 for inclined plate precipitation treatment to generate biochemical sludge and standard-reaching wastewater;
s26, conveying the biochemical sludge to the sludge collection tank for collection; conveying the standard-reaching wastewater to a disinfection device 27 for disinfection;
s27, discharging the disinfected wastewater reaching the standard;
s3, collecting the mixture of the materialized sludge, the biochemical sludge and the floating oil liquid by using the sludge concentration tank 31;
s4, conveying the mixture in the sludge concentration tank 31 to the dewatering device 33 through the sludge conveying pump 3213 to generate a dry sludge cake and filtrate;
s5, the dry mud cake is sent to be buried; the filtrate is conveyed back to the sump 12 for re-treatment.
Specifically, in the present embodiment, the CS treatment device 26 refers to a treatment apparatus employing an inclined plate sedimentation function; the physicochemical reaction device 15 is a method for coagulating and precipitating suspended matters in water by using a physical and chemical method; the biochemical reaction device adopts microorganisms such as aerobic bacteria and anaerobic bacteria to decompose organic matters in water into inorganic matters, so that the pressure of domestic wastewater on environmental decomposition is reduced.
The embodiment also provides an effect comparison table adopting the wastewater treatment device and the treatment process:
A. design of water quality index meter (unit: mg/L) for oily wastewater
After the treatment of the equipment, the oil content of the effluent is less than or equal to 40mg/L, and the oil removal rate is more than 85 percent.
B. Design of domestic wastewater inlet water quality index meter (unit: mg/L)
Index (I) | pH | CODcr | BOD5 | SS | NH3-N | Total nitrogen | Total phosphorus | Animal and vegetable oil |
Domestic sewage | 6-8 | ≤500 | ≤250 | ≤200 | ≤35 | ≤40 | ≤5 | ≤30 |
The effluent index after being treated by the system
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (10)
1. A marine wastewater treatment plant, comprising:
the oily wastewater treatment module is used for separating oily wastewater into floating oil, lower-layer sewage and materialized sludge;
the domestic wastewater treatment module is used for separating domestic wastewater into biochemical sludge and standard-reaching wastewater;
the sludge dewatering module is used for dewatering the mixture of the materialized sludge, the biochemical sludge and the floating oil liquid into a dry sludge cake and a filtrate;
the first input end of the oily wastewater treatment module, which is used for receiving oily wastewater, is communicated with an oily wastewater discharge port; a first output end of the oily wastewater treatment module, which is used for outputting floating oil, is communicated with a first input end of the sludge dewatering module; a second output end of the oily wastewater treatment module, which is used for outputting materialized sludge, is communicated with a second input end of the sludge dehydration module; a third output end of the oily wastewater treatment module, which is used for outputting lower-layer sewage, is communicated with the first input end of the domestic wastewater treatment module; a second input end of the domestic wastewater treatment module, which is used for receiving domestic wastewater, is communicated with the domestic wastewater discharge port; a first output end of the domestic wastewater treatment module for outputting biochemical sludge is communicated with a third input end of the sludge dewatering module; a second output end of the domestic wastewater treatment module, which is used for outputting standard-reaching wastewater, is communicated with a standard-reaching wastewater discharge port; a first output end of the sludge dewatering module, which is used for outputting filtrate, is communicated with a second input end of the oily wastewater treatment module; the sludge dewatering module further comprises a second output end for producing a dry sludge cake.
2. The marine wastewater treatment plant according to claim 1, wherein the oily wastewater treatment module comprises: the device comprises a collecting tank for collecting oily wastewater, a separating device for carrying out oil-water separation on the oily wastewater to generate floating oil and bottom layer separating liquid, a physicochemical reaction device for carrying out physicochemical reaction on the bottom layer separating liquid to generate lower layer sewage and sediment, and a precipitation device for separating the lower layer sewage and the sediment;
the first input end of the water collecting tank is communicated with an oil-containing wastewater discharge port; the second input end of the water collecting tank is communicated with the first output end of the sludge dewatering module;
the output end of the water collecting tank is communicated with the input end of the separation device; a first output end of the separation device for outputting floating oil liquid is communicated with a first input end of the sludge dewatering module; a second output end of the separation device for outputting the floating oil liquid is communicated with the input end of the physicochemical reaction device; the output end of the physicochemical reaction device is communicated with the input end of the precipitation device; a first output end of the sedimentation device for outputting the materialized sludge is communicated with a second input end of the sludge dewatering module; and a second output end of the sedimentation device, which is used for outputting the lower-layer sewage, is communicated with a first input end of the domestic wastewater treatment module.
3. The marine wastewater treatment plant of claim 2, wherein the oily wastewater treatment module further comprises: the delivery pump is used for accelerating the flow of the oily wastewater in the collecting tank; the input end of the delivery pump is communicated with the output end of the water collecting tank; and the output end of the delivery pump is communicated with the input end of the separation device.
4. The marine wastewater treatment apparatus according to claim 1, wherein the domestic wastewater treatment module comprises: the domestic wastewater treatment system comprises a regulating tank for collecting domestic wastewater, a biochemical treatment device for biologically decomposing the domestic wastewater, a CS treatment device for performing inclined plate precipitation treatment on the biochemically treated domestic wastewater, and a disinfection device for disinfecting the precipitated domestic wastewater;
the first input end of the regulating tank is communicated with the domestic wastewater discharge port; the second input end of the regulating tank is communicated with the third output end of the oily wastewater treatment module, which is used for outputting lower-layer sewage; the output end of the regulating tank is communicated with the input end of the biochemical treatment device; the output end of the biochemical treatment device is communicated with the input end of the CS treatment device; a first output end of the CS treatment device for outputting biochemical sludge is connected with an input end of the disinfection device; a second output end of the CS treatment device for outputting biochemical sludge is connected with a third input end of the sludge dewatering module; the output end of the disinfection device is communicated with the standard-reaching wastewater discharge port.
5. The marine wastewater treatment apparatus of claim 4, wherein the sanitary wastewater treatment module further comprises: a lift pump and a grid well for filtering particulate matter and fibrous matter in the domestic wastewater; the input end of the grid well is communicated with the domestic wastewater discharge port; the output end of the grid well is communicated with the first input end of the regulating pool; the input end of the lifting water pump is communicated with the output end of the regulating tank; the output end of the lifting water pump is communicated with the input end of the biochemical treatment device.
6. The marine wastewater treatment apparatus according to claim 4, wherein the biochemical treatment apparatus comprises an aerobic bacteria decomposition means, an anaerobic bacteria decomposition means, and a circulating water pump for decomposing the domestic wastewater a plurality of times; the first input end of the aerobic bacteria decomposition mechanism is communicated with the output end of the regulating tank; the second input end of the aerobic bacteria decomposition mechanism is communicated with the output end of the circulating water pump; the first input end of the anaerobic bacteria decomposition mechanism is communicated with the output end of the aerobic bacteria decomposition mechanism; and the first output end of the anaerobic bacteria decomposition mechanism is communicated with the input end of the CS treatment device, and the second output end of the anaerobic bacteria decomposition mechanism is communicated with the input end of the circulating water pump.
7. The marine wastewater treatment apparatus of claim 1, wherein the sludge dewatering module comprises: a sludge concentration tank, a sludge delivery pump and a dewatering device; the first input end of the sludge concentration tank is communicated with the first output end of the oily wastewater treatment module; the second input end of the sludge concentration tank is communicated with the second output end of the oily wastewater treatment module; the third input end of the sludge concentration tank is communicated with the first output end of the domestic wastewater treatment module; the output end of the sludge concentration tank is connected with the input end of the sludge delivery pump, the output end of the sludge delivery pump is communicated with the input end of the dehydration device, and the first output end of the dehydration device is communicated with the second input end of the oily wastewater treatment module; the dewatering device is also provided with a second output end for outputting the dry mud cake.
8. A marine wastewater treatment process using the marine wastewater treatment apparatus according to any one of claims 1 to 7, comprising:
s1, separating the oily wastewater into oil slick liquid, materialized sludge and lower-layer sewage by using the oily wastewater treatment module, conveying the oil slick liquid and the materialized sludge into the sludge dehydration module, and conveying the lower-layer sewage into the domestic wastewater treatment module;
s2, separating the domestic wastewater into standard wastewater and biochemical sludge by using the domestic wastewater treatment module; conveying the biochemical sludge into the sludge dewatering module, and discharging the standard-reaching wastewater into the environment;
s3, collecting the mixture of the materialized sludge, the biochemical sludge and the floating oil liquid by using the sludge concentration tank;
s4, conveying the mixture in the sludge concentration tank to the dewatering device through the sludge conveying pump to generate a dry sludge cake and a filtrate;
s5, the dry mud cake is sent to be buried; and conveying the filtrate back to the collecting tank for treatment again.
9. The marine wastewater treatment process according to claim 8, wherein the step S1 includes:
s11, collecting the oily sewage and filtrate by using the collecting tank;
s12, conveying the mixture in the collecting tank to a separation device by using the conveying pump to be separated into floating oil liquid and bottom layer separation liquid;
s13, conveying the oil slick liquid into the sludge concentration tank, conveying the bottom layer separation liquid into the physicochemical reaction device, and separating suspended matters in the bottom layer separation liquid through a physical and chemical reaction;
s14, inputting the bottom layer separation liquid with suspended matters into a precipitation device for precipitation treatment to obtain precipitates and lower layer sewage;
s15, inputting the sediment into the sludge concentration tank, and inputting the lower layer sewage into the domestic wastewater treatment module.
10. The marine wastewater treatment process according to claim 8, wherein the step S2 includes:
s21, filtering particulate matters and fibrous matters in domestic wastewater and lower-layer sewage by using the grid well;
s22, collecting the mixture of the filtered domestic wastewater and the lower-layer sewage by using the regulating tank;
s23, conveying the mixture of the domestic wastewater and the lower-layer sewage in the regulating reservoir to the biochemical treatment device by using the lifting water pump;
s24, circulating the mixture of the domestic wastewater and the lower-layer sewage in the biochemical treatment device for multiple times through the circulating water pump so as to fully decompose the aerobic bacteria decomposition mechanism and the anaerobic bacteria decomposition mechanism;
s25, conveying the mixture of the domestic wastewater subjected to biochemical treatment and the lower-layer sewage into the CS treatment device for inclined plate precipitation treatment to generate biochemical sludge and standard-reaching wastewater;
s26, conveying the biochemical sludge to the sludge collection tank for collection; conveying the standard-reaching wastewater into a disinfection device for disinfection;
s27, discharging the disinfected wastewater reaching the standard.
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