CN112250261A - Marine domestic sewage treatment device for nitrogen and phosphorus removal by composite membrane method - Google Patents
Marine domestic sewage treatment device for nitrogen and phosphorus removal by composite membrane method Download PDFInfo
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- CN112250261A CN112250261A CN202011286699.4A CN202011286699A CN112250261A CN 112250261 A CN112250261 A CN 112250261A CN 202011286699 A CN202011286699 A CN 202011286699A CN 112250261 A CN112250261 A CN 112250261A
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- 239000012528 membrane Substances 0.000 title claims abstract description 84
- 239000010865 sewage Substances 0.000 title claims abstract description 82
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 62
- 238000000034 method Methods 0.000 title claims abstract description 32
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 229910052698 phosphorus Inorganic materials 0.000 title claims abstract description 31
- 239000011574 phosphorus Substances 0.000 title claims abstract description 31
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 29
- 239000002131 composite material Substances 0.000 title claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 70
- 239000010802 sludge Substances 0.000 claims abstract description 45
- 238000006460 hydrolysis reaction Methods 0.000 claims abstract description 22
- 230000007062 hydrolysis Effects 0.000 claims abstract description 21
- 239000000126 substance Substances 0.000 claims abstract description 18
- 238000005273 aeration Methods 0.000 claims abstract description 11
- 230000001105 regulatory effect Effects 0.000 claims abstract description 8
- 239000003814 drug Substances 0.000 claims abstract description 7
- 239000013505 freshwater Substances 0.000 claims abstract description 4
- 239000013535 sea water Substances 0.000 claims abstract description 4
- 239000006228 supernatant Substances 0.000 claims abstract description 4
- 239000000945 filler Substances 0.000 claims description 47
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 22
- 239000001301 oxygen Substances 0.000 claims description 22
- 229910052760 oxygen Inorganic materials 0.000 claims description 22
- 241000894006 Bacteria Species 0.000 claims description 13
- 230000008569 process Effects 0.000 claims description 11
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- 244000005700 microbiome Species 0.000 claims description 7
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 6
- 230000001546 nitrifying effect Effects 0.000 claims description 6
- JVMRPSJZNHXORP-UHFFFAOYSA-N ON=O.ON=O.ON=O.N Chemical compound ON=O.ON=O.ON=O.N JVMRPSJZNHXORP-UHFFFAOYSA-N 0.000 claims description 5
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims description 5
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- 239000002033 PVDF binder Substances 0.000 claims description 4
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 4
- 239000003344 environmental pollutant Substances 0.000 claims description 4
- 229920002521 macromolecule Polymers 0.000 claims description 4
- YPJKMVATUPSWOH-UHFFFAOYSA-N nitrooxidanyl Chemical compound [O][N+]([O-])=O YPJKMVATUPSWOH-UHFFFAOYSA-N 0.000 claims description 4
- 231100000719 pollutant Toxicity 0.000 claims description 4
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 4
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- 241001148470 aerobic bacillus Species 0.000 claims description 3
- 238000006065 biodegradation reaction Methods 0.000 claims description 3
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- 239000000463 material Substances 0.000 claims description 3
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- 150000001875 compounds Chemical class 0.000 claims 1
- 239000010797 grey water Substances 0.000 abstract description 8
- 239000010866 blackwater Substances 0.000 abstract description 4
- 235000015097 nutrients Nutrition 0.000 abstract description 3
- 238000005406 washing Methods 0.000 abstract description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 8
- 229910019142 PO4 Inorganic materials 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 239000010452 phosphate Substances 0.000 description 7
- 239000013043 chemical agent Substances 0.000 description 5
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 3
- 241000108664 Nitrobacteria Species 0.000 description 3
- 239000000460 chlorine Substances 0.000 description 3
- 229910052801 chlorine Inorganic materials 0.000 description 3
- 239000002244 precipitate Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000012851 eutrophication Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000003403 water pollutant Substances 0.000 description 2
- CTSLUCNDVMMDHG-UHFFFAOYSA-N 5-bromo-3-(butan-2-yl)-6-methylpyrimidine-2,4(1H,3H)-dione Chemical compound CCC(C)N1C(=O)NC(C)=C(Br)C1=O CTSLUCNDVMMDHG-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012258 culturing Methods 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
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
-
- 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
- C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
-
- 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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/10—Solids, e.g. total solids [TS], total suspended solids [TSS] or volatile solids [VS]
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/14—NH3-N
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/16—Total nitrogen (tkN-N)
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/18—PO4-P
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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
- 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
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
-
- 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
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
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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)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention relates to a domestic sewage treatment device for a nitrogen and phosphorus removal ship by a composite membrane method.A regulating cabinet is connected with a domestic sewage pipe for the ship and is connected with a hydrolysis cabinet by a pipeline; the sludge cabinet is connected with a pressure seawater or fresh water pipe and is connected with the anoxic cabinet through a supernatant overflow pipe; the hydrolysis cabinet is sequentially connected with the anoxic cabinet, the aerobic cabinet, the membrane cabinet and the clear water cabinet; a medicine box is also connected on a connecting pipeline between the aerobic cabinet and the membrane cabinet, and an ultraviolet sterilizer is also connected on a connecting pipeline between the membrane cabinet and the clear water cabinet; the bottom parts of the adjusting cabinet, the hydrolysis cabinet and the clear water cabinet are connected with an overflow sewage pipe; the sludge return port at the bottom of the membrane cabinet is connected with the sludge cabinet and the aerobic cabinet through a sludge return pipe; the anoxic cabinet, the aerobic cabinet and the membrane cabinet are also connected with an aeration pipe, and the bottom of the membrane cabinet is also connected with an air stripping pipe. The invention can be used for collecting and treating ship domestic sewage, including black water, kitchen grey water and washing grey water, and can effectively remove organic matters, suspended matters, nitrogen, phosphorus and other nutrient substances in the sewage, so that the treated water can reach the standard and be discharged.
Description
Technical Field
The invention relates to a sewage treatment device, in particular to a marine domestic sewage treatment device adopting a composite membrane method and having nitrogen and phosphorus removal capability.
Background
The domestic sewage of the ship comes from the daily domestic drainage of crew and passengers on the ship. The discharge water quality can be divided into two types of black water and grey water. "Black water" refers to toilet drainage with a high level of pollutants, i.e., fecal sewage; "Grey water" refers to less contaminated kitchen grey water, wash grey water.
The ship domestic sewage usually contains higher BOD and SS than the urban domestic sewage, and the pollution load is higher. Therefore, when a large number of ships sail in the water body and domestic sewage of the ships is not treated, the quality of the water environment of the water body is influenced. Besides directly causing oxygen-consuming organic pollution of the water body, the ship domestic sewage contains more nutrient elements such as nitrogen, phosphorus and the like, so that if the sewage is directly discharged without effective treatment, eutrophication of the water body is caused, the self-purification balance of the water body is destroyed, and the water environment quality of the area is deteriorated. Therefore, it is very necessary to treat nitrogen and phosphorus in the marine domestic sewage.
At present, the technology adopted by the existing marine domestic sewage treatment device mainly considers the indexes of reducing COD (chemical oxygen demand), BOD5 (five-day biochemical oxygen demand), SS (suspended solids), coliform bacteria, residual chlorine and the like in the discharged water, so that most domestic sewage treatment devices do not have the capability of nitrogen and phosphorus removal.
The united nations International Maritime Organization (IMO) issued MEPC 227(64) at MEPC 64 meetings on day 10 and 3 of 2012, increasing the emission index of total nitrogen and total phosphorus, implemented from 1 and 1 of 2016. The new standards require passenger ships sailing in restricted waters (such as the sea of borea, alaska, the five great lakes, etc.), equipped with devices for the treatment of domestic sewage that must have nitrogen and phosphorus treatment capacity and meet emission limits.
In 2018, 16.1.2018, the national environmental protection agency released GB 3552-2018 'discharge control Standard for Water pollutants for ships', and for the discharge of domestic wastewater for ships, besides the increase of indexes of PH value, chemical oxygen demand and total chlorine (total residual chlorine), two discharge indexes of total nitrogen and total phosphorus were also increased.
Therefore, a marine domestic sewage treatment device with nitrogen and phosphorus removal capability is needed, so that the treated sewage meets the standard, the pollution to the water body is reduced, and the eutrophication of the water body is avoided.
Disclosure of Invention
The invention aims to provide a device for treating domestic sewage for a ship by a composite membrane method, which is used for collecting and treating the domestic sewage of the ship, including black water, kitchen grey water and washing grey water, effectively removing organic matters, suspended matters, nitrogen, phosphorus and other nutrient substances in the sewage, and enabling the treated water to reach the standard and be discharged.
In order to solve the technical problems, the following technical scheme is adopted:
a marine domestic sewage treatment device for nitrogen and phosphorus removal by a composite membrane method comprises an adjusting cabinet, a sludge cabinet, a hydrolysis cabinet, an anoxic cabinet, an aerobic cabinet, a membrane cabinet, a clear water cabinet, an ultraviolet sterilizer and a medicine box, wherein the adjusting cabinet is connected with a marine domestic sewage pipe and is connected with the hydrolysis cabinet through a pipeline; the sludge cabinet is connected with a pressure seawater or fresh water pipe and is connected with the anoxic cabinet through a supernatant overflow pipe; the hydrolysis cabinet is sequentially connected with the anoxic cabinet, the aerobic cabinet, the membrane cabinet and the clear water cabinet; a medicine box is also connected on a connecting pipeline between the aerobic cabinet and the membrane cabinet, and an ultraviolet sterilizer is also connected on a connecting pipeline between the membrane cabinet and the clear water cabinet; the bottom parts of the adjusting cabinet, the hydrolysis cabinet and the clear water cabinet are connected with an overflow sewage pipe; the sludge return port at the bottom of the membrane cabinet is connected with the sludge cabinet and the aerobic cabinet through a sludge return pipe; the anoxic cabinet, the aerobic cabinet and the membrane cabinet are also connected with an aeration pipe, and the bottom of the membrane cabinet is also connected with an air stripping pipe.
Furthermore, the regulating cabinet is used for regulating water quantity and water quality so that the water quantity uniformly enters the hydrolysis cabinet.
Further, be equipped with the volcanic filler in the cabinet of hydrolysising, utilize the volcanic filler in the cabinet of hydrolysising, hold back the big granule suspended solid in the sewage to under anaerobic environment, utilize the bacterium of hydrolysising to hydrolyze the aquatic insoluble organic matter for the dissolubility organic matter, turn into the macromolecular substance of difficult biodegradable into the micromolecular substance of easy biodegradable, thereby improve the biodegradability of waste water, provide good quality of water environment for follow-up biochemical treatment.
Further, the volcanic rock filler is an amorphous natural porous volcanic rock ore particle filler processed by mineral separation, crushing, screening and grinding processes.
Further, a fixed filler is arranged in the anoxic cabinet, a place for microorganisms to inhabit and grow is provided, a biological film is easy to form, sewage is fully contacted with the biological film fixed on the surface of the filler, a part of organic matters are removed through biodegradation, and in the environment that dissolved oxygen is less than or equal to 0.5mg/L, denitrifying bacteria use carbon-containing organic substances which are not decomposed in the sewage as a carbon source, nitrate radical which flows back through internal circulation is reduced into nitrogen gas and released, so that the aim of denitrification is fulfilled.
Furthermore, the fixed filler is formed by weaving special fibers with strong hydrophilicity and good sludge adhesion through mechanical processing, and the shape of the fixed filler is spiral.
Further, a movable filler is filled in the aerobic cabinet, the aerobic cabinet is aerated by an external fan, the movable filler continuously and orderly rolls in the aerobic cabinet, a biological film on the surface of the filler is fully contacted with sewage to degrade most organic matters, aerobic bacteria are cultured in the environment that dissolved oxygen is more than or equal to 2.0mg/L, the organic matters in the wastewater are treated by the action of microorganisms, a nitrification process is carried out in the aerobic cabinet, and ammonia nitrogen and nitrite nitrogen are converted into nitrate nitrogen by the action of the nitrifying bacteria; the movable filler is a suspension filler and is in one of a spherical shape, a cylindrical shape and a square particle shape.
Furthermore, an immersed membrane component is arranged in the membrane cabinet and used for intercepting colloid and suspended matters in the filtered water, so that the indexes of the suspended matters in the outlet water meet the requirements; a perforated aeration pipe is also arranged in the membrane cabinet, and bubbles are flushed from the surface of the membrane in the process of moving upwards from the bottom through aeration of an external fan, so that the deposition and adhesion of pollutants on the surface of the membrane are reduced; the immersed membrane component is a flat membrane, and the material of the immersed membrane component is one of polytetrafluoroethylene, polyvinylidene fluoride and ceramics.
Further, the sludge cabinet is an oxygen-eliminating and settling integrated cabinet and is used for storing sludge which is stripped and returned from the membrane cabinet, after a certain retention time, chemical sludge in the sludge is settled to the bottom of the cabinet body, meanwhile, dissolved oxygen in the nitrified liquid can be reduced, and the nitrified liquid with low dissolved oxygen and low chemical sludge is sent to the oxygen-deficient cabinet for denitrification treatment.
Furthermore, at least one ultraviolet lamp tube is arranged in the ultraviolet sterilizer, and the water after membrane filtration is sterilized through ultraviolet rays to kill the coliform bacteria in the water.
The invention has the beneficial effects that:
1. the adjusting cabinet is arranged, so that the water quantity and the water quality are reasonably adjusted, the sewage uniformly enters the rear-end treatment cabinet chamber, and the problem of unstable inflow of the domestic sewage for the ship is solved.
2. The hydrolysis cabinet is arranged, and the volcanic rock filler is filled, so that large-particle suspended matters are effectively intercepted;
3. the anaerobic cabinet is arranged, the fixed filler is arranged in the anaerobic cabinet, so that denitrifying bacteria can grow and attach to the filler, a good biological film is formed, nitrate radical which flows back from the inner circulation can be reduced into nitrogen gas to be released, and the effect of denitrification is achieved.
4. Set up good oxygen cabinet, inside sets up portable filler, makes nitrobacteria can grow on the filler and adheres to, makes filler and sewage fully contact through fan aeration, and effectual effect through nitrobacteria is with ammonia nitrogen, nitrite nitrogen conversion nitrate nitrogen to mostly organic matter has been degraded simultaneously.
5. The membrane cabinet is arranged, the membrane component is arranged in the membrane cabinet, and suspended matters in the filtered water are effectively intercepted, so that the indexes of the suspended matters in the effluent meet the requirements. Chemical agents are added into the membrane cabinet, and the combination reaction of the chemical agents and soluble phosphate in sewage is converted into non-soluble phosphate precipitate, so that the phosphorus removal effect is obvious.
6. The sludge cabinet is arranged, so that the effect of separating chemical sludge from nitrifying liquid is achieved, dissolved oxygen in the nitrifying liquid is reduced, and the nitrifying liquid with low dissolved oxygen and low chemical sludge adhesion is sent to the anoxic cabinet for denitrification treatment.
Drawings
FIG. 1 is a flow chart of the system and method of the present invention.
Detailed Description
The invention provides a domestic sewage treatment device for a nitrogen and phosphorus removal ship by a composite membrane method, and in order to make the advantages and technical scheme of the invention clearer and clearer, the invention is described in detail by combining specific embodiments.
As shown in figure 1, the device for treating domestic sewage for a nitrogen and phosphorus removal ship by a composite membrane method comprises a regulating cabinet, a sludge cabinet, a hydrolysis cabinet, an anoxic cabinet, an aerobic cabinet, a membrane cabinet, a clear water cabinet, an ultraviolet sterilizer, a medicine chest and the like.
The adjusting cabinet is connected with the marine domestic sewage pipe and is connected with the hydrolysis cabinet through a pipeline; the sludge cabinet is connected with a pressure seawater or fresh water pipe and is connected with the anoxic cabinet through a supernatant overflow pipe; the hydrolysis cabinet is sequentially connected with the anoxic cabinet, the aerobic cabinet, the membrane cabinet and the clear water cabinet; a medicine box is also connected on a connecting pipeline between the aerobic cabinet and the membrane cabinet, and an ultraviolet sterilizer is also connected on a connecting pipeline between the membrane cabinet and the clear water cabinet; the bottoms of the adjusting cabinet, the hydrolysis cabinet and the clean water cabinet are connected with an overflow sewage pipe; a sludge return port at the bottom of the membrane cabinet is connected with the sludge cabinet and the aerobic cabinet through a sludge return pipe; the anoxic cabinet, the aerobic cabinet and the membrane cabinet are also connected with an aeration pipe, and the bottom of the membrane cabinet is also connected with an air stripping pipe.
The adjusting cabinet is used for adjusting the water quantity and the water quality reasonably aiming at the characteristic that the inflow flow of the domestic sewage for the ship is unstable, so that the domestic sewage can uniformly enter the rear-end treatment cabinet chamber.
The hydrolysis cabinet has two functions. The first is that under anaerobic environment, water insoluble organic matter is hydrolyzed into soluble organic matter by utilizing hydrolytic bacteria, and macromolecular substances which are difficult to biodegrade are converted into micromolecular substances which are easy to biodegrade, so that the biodegradability of the waste water is improved, and a good water quality environment is provided for subsequent biochemical treatment. The second is to use volcanic rock filler in the hydrolysis cabinet to retain large particle suspended matters in the sewage.
The volcanic filler is amorphous granular filler which is prepared from natural porous volcanic rock ore through a series of processes such as mineral separation, crushing, screening and grinding, and is porous and light. Is suitable for the growth and reproduction of microorganisms on the surface to form a biological film. The biological filler is mainly applied to a water treatment filter tank.
An oxygen-poor cabinet, under the environment of Dissolved Oxygen (DO) less than or equal to 0.5mg/L, denitrifying bacteria in the oxygen-poor cabinet use undecomposed carbon-containing organic substances in sewage as carbon sources, and nitrate radical which flows back through internal circulation is reduced into nitrogen gas to be released, thereby achieving the purpose of denitrification. A fixed filler is arranged in the anoxic cabinet, a place for microorganisms to inhabit and grow is provided, a biological film is easy to form, sewage is fully contacted with the biological film fixed on the surface of the filler, and a part of organic matters are removed through biodegradation.
The fixed filler is made up by using special fibre with strong hydrophilicity and good sludge adhesion property through the processes of mechanical processing and weaving, and its form is spiral, film-forming speed is quick, pollutant-removing capacity is strong, form-retaining capacity is strong and water fluctuation resistance is strong.
The aerobic cabinet is used for culturing aerobic bacteria in an environment with Dissolved Oxygen (DO) being more than or equal to 2.0mg/L and treating organic matters in the wastewater through the action of microorganisms. On the other hand, the nitrification process is carried out in the aerobic cabinet, and the ammonia nitrogen and the nitrite nitrogen are converted into nitrate nitrogen under the action of nitrifying bacteria. The aerobic cabinet is filled with a movable filler, the aerobic cabinet is aerated by the external fan, and the movable filler continuously and orderly rolls in the aerobic cabinet, so that a biological film on the surface of the filler is fully contacted with sewage, and most organic matters are degraded.
The movable filler is also called as suspended filler. The packing has the advantages of spherical shape, cylindrical shape, square particle shape and the like, different sizes, specific gravities and gaps, and has the flexibility and the optimization of different water qualities, different container structures and different shapes of packing. The filler has the advantages of good oxygenation performance, fast film forming, large film forming amount, good biological film updating performance, long service life, simple replacement and the like.
The membrane cabinet is internally provided with an immersed membrane component which is used for intercepting colloid and suspended matters in filtered water, so that the indexes of the suspended matters in the effluent meet the requirements. The perforated aeration pipe is arranged in the membrane cabinet, and the bubbles can wash the membrane surface from the bottom to the upward movement process through the aeration of the external fan, so that the deposition and adhesion of pollutants on the membrane surface are reduced. The membrane cabinet is provided with a dosing inlet, and the membrane cabinet is combined with soluble phosphate in sewage to react and convert into non-soluble phosphate precipitate by adding a chemical agent, so that the effect of removing phosphate ions is achieved. An air stripping device is arranged in the membrane cabinet, and precipitated sludge at the bottom of the membrane cabinet flows back to the sludge cabinet and the aerobic cabinet through air stripping.
The immersed membrane component is a flat membrane, and the material of the immersed membrane component can be Polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF), ceramic and the like. Has the characteristics of large membrane flux and strong pollution resistance.
The sludge cabinet, namely the oxygen-eliminating and settling integrated cabinet, is used for storing the sludge stripped and returned from the membrane cabinet, after a certain retention time, the chemical sludge in the sludge is settled to the bottom of the cabinet body, meanwhile, the dissolved oxygen in the nitrified liquid is reduced, and the nitrified liquid with low dissolved oxygen and low chemical sludge is sent to the oxygen-deficient cabinet for denitrification treatment.
The clear water tank is used for storing water which can be discharged after reaching standards and is finally treated. A medicine box, namely a container for storing chemical agents for removing phosphorus. One or more ultraviolet lamp tubes are arranged in the ultraviolet sterilizer, and water after membrane filtration is disinfected by ultraviolet rays to kill coliform in the water.
When the marine domestic sewage treatment device for nitrogen and phosphorus removal by a composite membrane method is used, domestic sewage enters the regulating cabinet to be uniformly distributed, and meanwhile, the inlet and outlet valves of the water pump of the regulating cabinet are used for uniformly conveying the sewage to the hydrolysis cabinet; the sewage stays in the hydrolysis cabinet for a period of time, and most suspended matters are removed through filtration and interception of volcanic rock filler. Meanwhile, hydrolysis reaction is carried out in an anaerobic environment, and macromolecular substances which are difficult to biodegrade are converted into micromolecular substances which are easy to biodegrade; the sewage enters an anoxic cabinet, the dissolved oxygen in the water is controlled to be below 0.5mg/L, and nitrate nitrogen is converted into nitrogen through denitrifying bacteria to achieve the effect of denitrification; the sewage enters an aerobic cabinet, most of organic matters in the sewage are removed through full contact between the movable filler and the sewage, and ammonia nitrogen and nitrite nitrogen are converted into nitrate nitrogen through nitrobacteria; the sewage enters the membrane cabinet, and suspended matters in the water are intercepted through the filtering action of the membrane. Chemical agents are added to react with soluble phosphate in the sewage in a combined manner to convert the soluble phosphate into non-soluble phosphate precipitate, so that the effect of removing phosphorus is achieved; the membrane-filtered sewage is sterilized by an ultraviolet sterilizer and then stored in clear water. Other mud-water mixtures in the membrane cabinet are subjected to gas stripping, and a part of the mud-water mixtures returns to the aerobic cabinet to supplement the concentration of the suspended mud; and returning a part of the sludge to the sludge cabinet, after staying for a period of time, settling the sludge at the bottom, and overflowing the nitrified liquid at the upper part to the anoxic cabinet for denitrification.
The following is a detailed description with reference to examples.
Example 1
Treating domestic sewage of a certain test base of Shanghai Song Jiangjiang New bridge according to a K05 domestic sewage treatment device to obtain treated domestic sewage of 11.5m3The invention is used for treating sewage, and the main operation process parameters are as follows according to the water quantity and the water quality of the sewage:
BOD of influent water5More than or equal to 500mg/L, and the SS of the inlet water is more than or equal to 500mg/L, and the COD and BOD of the outlet water of the sewage treated by the method are5The total nitrogen and total phosphorus indexes all meet the requirements of the MEPC 227 (resolution 64) and GB 3552-2018 ship water pollutant emission control standard.
TABLE 1 quality of domestic sewage inflow and outflow water in some test base of Haimangjiang New bridge
Claims (10)
1. The utility model provides a marine domestic sewage treatment device of compound embrane method nitrogen and phosphorus removal, is including adjusting cabinet, sludge impoundment, the cabinet of hydrolysising, oxygen deficiency cabinet, good oxygen cabinet, membrane cabinet, clear water cabinet, ultraviolet sterilizer, medical kit, its characterized in that: the adjusting cabinet is connected with a marine domestic sewage pipe and is connected with the hydrolysis cabinet through a pipeline; the sludge cabinet is connected with a pressure seawater or fresh water pipe and is connected with the anoxic cabinet through a supernatant overflow pipe; the hydrolysis cabinet is sequentially connected with the anoxic cabinet, the aerobic cabinet, the membrane cabinet and the clear water cabinet; a medicine box is also connected on a connecting pipeline between the aerobic cabinet and the membrane cabinet, and an ultraviolet sterilizer is also connected on a connecting pipeline between the membrane cabinet and the clear water cabinet; the bottom parts of the adjusting cabinet, the hydrolysis cabinet and the clear water cabinet are connected with an overflow sewage pipe; the sludge return port at the bottom of the membrane cabinet is connected with the sludge cabinet and the aerobic cabinet through a sludge return pipe; the anoxic cabinet, the aerobic cabinet and the membrane cabinet are also connected with an aeration pipe, and the bottom of the membrane cabinet is also connected with an air stripping pipe.
2. The device for treating domestic sewage for nitrogen and phosphorus removal ships by using the composite membrane method as claimed in claim 1, wherein: the regulating cabinet is used for regulating water quantity and water quality, so that the water quantity uniformly enters the hydrolysis cabinet.
3. The device for treating domestic sewage for nitrogen and phosphorus removal ships by using the composite membrane method as claimed in claim 1, wherein: be equipped with the volcanic filler in the cabinet of hydrolysising, utilize the volcanic filler in the cabinet of hydrolysising, hold back the big granule suspended solid in the sewage to under anaerobic environment, utilize the hydrolytic bacteria to hydrolyze the aquatic insoluble organic matter for the dissolubility organic matter, turn into the macromolecular substance of difficult biodegradable into the micromolecular substance of easy biodegradable, thereby improve the biodegradability of waste water, provide good quality of water environment for follow-up biochemical treatment.
4. The device for treating domestic sewage for nitrogen and phosphorus removal ships by using the composite membrane method as claimed in claim 1, wherein: the volcanic rock filler is an unformed natural porous volcanic rock ore particle filler processed by mineral separation, crushing, screening and grinding processes.
5. The device for treating domestic sewage for nitrogen and phosphorus removal ships by using the composite membrane method as claimed in claim 1, wherein: the fixed filler is arranged in the anoxic cabinet, a place for microorganisms to inhabit and grow is provided, a biological film is easy to form, sewage is fully contacted with the biological film fixed on the surface of the filler, a part of organic matters are removed through biodegradation, and denitrifying bacteria take undecomposed carbon-containing organic matters in the sewage as a carbon source under the environment that dissolved oxygen is less than or equal to 0.5mg/L, nitrate radical which flows back through internal circulation is reduced into nitrogen gas to be released, so that the aim of denitrification is fulfilled.
6. The device for treating domestic sewage for nitrogen and phosphorus removal ships by using the composite membrane method as claimed in claim 1, wherein: the fixed filler is formed by weaving special fibers with strong hydrophilicity and good sludge adhesion through mechanical processing, and the shape of the fixed filler is spiral.
7. The device for treating domestic sewage for nitrogen and phosphorus removal ships by using the composite membrane method as claimed in claim 1, wherein: the aerobic cabinet is filled with a movable filler, the aerobic cabinet is aerated by an external fan, the movable filler continuously and orderly rolls in the aerobic cabinet, a biological film on the surface of the filler is fully contacted with sewage to degrade most organic matters, aerobic bacteria are cultured in the environment that dissolved oxygen is more than or equal to 2.0mg/L, the organic matters in the sewage are treated by the action of microorganisms, a nitrification process is carried out in the aerobic cabinet, and ammonia nitrogen and nitrite nitrogen are converted into nitrate nitrogen by the action of the nitrifying bacteria; the movable filler is a suspension filler and is in one of a spherical shape, a cylindrical shape and a square particle shape.
8. The device for treating domestic sewage for nitrogen and phosphorus removal ships by using the composite membrane method as claimed in claim 1, wherein: the membrane cabinet is internally provided with an immersed membrane assembly for intercepting colloid and suspended matters in filtered water, so that the indexes of the suspended matters in the effluent meet the requirements; a perforated aeration pipe is also arranged in the membrane cabinet, and bubbles are flushed from the surface of the membrane in the process of moving upwards from the bottom through aeration of an external fan, so that the deposition and adhesion of pollutants on the surface of the membrane are reduced; the immersed membrane component is a flat membrane, and the material of the immersed membrane component is one of polytetrafluoroethylene, polyvinylidene fluoride and ceramics.
9. The device for treating domestic sewage for nitrogen and phosphorus removal ships by using the composite membrane method as claimed in claim 1, wherein: the sludge cabinet is an oxygen-eliminating and settling integrated cabinet and is used for storing sludge which flows back from the membrane cabinet through gas stripping, after certain retention time, chemical sludge in the sludge settles to the bottom of the cabinet body, meanwhile, dissolved oxygen in the nitrified liquid can be reduced, and the nitrified liquid with low dissolved oxygen and low chemical sludge adhesion is sent to the oxygen-poor cabinet for denitrification treatment.
10. The device for treating domestic sewage for nitrogen and phosphorus removal ships by using the composite membrane method as claimed in claim 1, wherein: at least one ultraviolet lamp tube is arranged in the ultraviolet sterilizer, and water after membrane filtration is disinfected through ultraviolet rays to kill coliform in the water.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114180787A (en) * | 2021-12-07 | 2022-03-15 | 中国船舶重工集团公司第七0四研究所 | Ship domestic sewage treatment and discharge control system based on Beidou and electronic chart |
| CN114262659A (en) * | 2021-12-03 | 2022-04-01 | 中国船舶重工集团公司第七0四研究所 | Automatic bacteria culture system for marine domestic sewage treatment device |
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2020
- 2020-11-17 CN CN202011286699.4A patent/CN112250261A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114262659A (en) * | 2021-12-03 | 2022-04-01 | 中国船舶重工集团公司第七0四研究所 | Automatic bacteria culture system for marine domestic sewage treatment device |
| CN114262659B (en) * | 2021-12-03 | 2024-06-04 | 中国船舶重工集团公司第七0四研究所 | Automatic bacteria culturing system for marine domestic sewage treatment device |
| CN114180787A (en) * | 2021-12-07 | 2022-03-15 | 中国船舶重工集团公司第七0四研究所 | Ship domestic sewage treatment and discharge control system based on Beidou and electronic chart |
| CN114180787B (en) * | 2021-12-07 | 2023-06-06 | 中国船舶重工集团公司第七0四研究所 | Ship domestic sewage treatment emission control system based on Beidou and electronic chart |
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