CN103755105A - Treatment system and treatment method for marine domestic sewage - Google Patents
Treatment system and treatment method for marine domestic sewage Download PDFInfo
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- CN103755105A CN103755105A CN201410042533.6A CN201410042533A CN103755105A CN 103755105 A CN103755105 A CN 103755105A CN 201410042533 A CN201410042533 A CN 201410042533A CN 103755105 A CN103755105 A CN 103755105A
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Abstract
The invention provides a treatment system for marine domestic sewage. The treatment system comprises a regulating pool and a membrane treatment pool, wherein the regulating pool is connected with a marine domestic sewage inlet pipeline and a seawater inlet pipeline; an electrolysis device is arranged in the regulating pool; the membrane treatment pool is connected with a clear water outlet pipeline; an MBR membrane module is arranged in the membrane treatment pool; the membrane treatment pool is connected with the regulating pool through a regulating pool water outlet pipeline. The invention further provides a treatment method for the marine domestic sewage. The treatment system combines the electrolysis method with the membrane separation method, so that the system has good stability, high reliability and small size, and can be widely applied to marine platforms and ships. The treatment method can effectively treat the marine domestic sewage; the operation of the system is stable; the effluent quality is obviously better than the water quality treated by the electrolysis method; the maintenance workload is small.
Description
Technical field
The present invention relates to water treatment field, be specifically related to a kind for the treatment of system of life afloat sewage and adopt described treatment system to carry out the treatment process of water treatment.
Background technology
The environmental requirement that offshore oil field development and vessel motion face is at present more and more higher, especially in sanitary sewage disposal, only requires in the past and controls unwanted bacteria (intestinal bacteria), to COD(chemical oxygen demand (COD)) do not require.But along with environmental protection pressure is increasing, National Bureau of Oceanography has required the discharge of offshore production platform and Sewage from Ships must consider the index of COD at present.
Processing for offshore platform and Sewage from Ships is mainly two large technology at present: film bioseparation technology (MBR) and electrolytic process.Film bioseparation technology (MBR) is a kind of technique that bioreaction technology and membrane separation technique are combined, first pollutent in sewage carries out aerobic biodegradation in bio-reactor, mixed solution in bio-reactor is under the poor effect of film pressure at both sides simultaneously, water sees through film with the small molecules solute that is less than membrane pore size, thereby reach the object of purifying treatment, in the situation of equipment steady running, effluent COD concentration can reach below 30mg/L.But in actual use, due to the severe Working environment in sea, microbic activity is extremely unstable, device cannot steady running, causes treatment effect not up to standard.And MBR method can produce a large amount of mud, due to not through processing, need regular labor cleaning, Operation and Maintenance workload is large.Electrolytic process is that sanitary sewage is mixed with seawater, under the effect of battery lead plate, produce the hypochlorite ion with germicidal action, destroy microorganisms cellularstructure, eliminate the bacteriums such as intestinal bacteria in sewage, simultaneously, oxygenolysis under the advanced oxidation effect that organic compound in sewage also produces in electrolysis, in the situation of equipment steady running, outlet COD concentration can reach below 300mg/L.Compare with MBR method, electrolytic process stabilization of equipment performance is good, is not subject to the impact of marine severe working conditions, and does not produce mud, and maintenance workload is little, but its outlet COD index is far above MBR method, can not meet the requirement of marine cleaner production.
Summary of the invention
For overcome the defect that cannot take into account system stability and effluent quality in existing life afloat sewage disposal simultaneously, an object of the present invention is to provide a kind for the treatment of system of life afloat sewage.
Another object of the present invention is to provide a kind for the treatment of process of life afloat sewage.
Treatment system provided by the invention comprises:
Equalizing tank, it is connected with life afloat sewage water inlet pipe line and seawater back with water inlet line, in described equalizing tank, is provided with electrolyzer; And
Film treating pond, it is connected with the Graceful water pipeline of processing rear clear water for discharging, is provided with one or more groups MBR membrane module in described film treating pond;
Wherein, described film treating pond is connected by equalizing tank water outlet pipeline with described equalizing tank.
In above-mentioned treatment system, described film treating pond is arranged on described equalizing tank.
In above-mentioned treatment system, described equalizing tank is also provided with for pulverizing the shredding unit of equalizing tank mud.
Wherein, described shredding unit is connected with the pipeline of discharging for mud.
In above-mentioned treatment system, on described life afloat sewage water inlet pipe line, seawater back with water inlet line, equalizing tank water outlet pipeline, Graceful water pipeline and mud vent line, be respectively arranged with control valve.
Wherein, described control valve with for regulating the control device of pipeline flow to be connected.
In above-mentioned treatment system, on described life afloat sewage water inlet pipe line and Graceful water pipeline, be also respectively arranged with under meter.
The treatment process of life afloat sewage provided by the invention adopts the treatment system of above technical scheme any one to process life afloat sewage, comprises the following steps:
1) pending life afloat sewage is transported in equalizing tank by life afloat sewage water inlet pipe line, by seawater back with water inlet line, in described equalizing tank, supply with seawater, by electrolyzer, use electrolytic process to process described life afloat sewage, simultaneously precipitating sludge;
2) water outlet after equalizing tank processing is sent in film treating pond by equalizing tank water outlet pipeline, by MBR membrane module, undertaken by Graceful water pipeline, being discharged after filtration treatment.
In described treatment process, also comprise mud discharge step, its process is as follows: stop equalizing tank water outlet to send into film treating pond, by seawater back with water inlet line, in described equalizing tank, supply with seawater, by described electrolyzer, use electrolytic process to process the mud in described equalizing tank, the mud after processing is discharged by mud vent line after pulverizing by shredding unit.
Wherein, described mud is discharged step for periodically carrying out, or carries out when described film treating pond keeps in repair or safeguards.
Treatment system of the present invention is carried out combination by electrolytic process and membrane separation process first, first utilize electrolytic process to carry out sterilization, remove the processing such as organism pending life afloat sewage, water after recycling MBR membrane module is processed electrolytic process carries out further filtration treatment, both solved the shortcoming of electrolytic process water-quality guideline deficiency, solved again a difficult problem for MBR method stability deficiency, system stability is good, maintenance workload is little, and reliability is high.Treatment system volume of the present invention is small and exquisite, can be widely used in offshore platform and boats and ships.
Treatment process of the present invention, by utilizing treatment system of the present invention, can effectively be processed system run all right to life afloat sewage, maintenance workload is little, COD concentration in draining can be down to below 30mg/L, and water quality is obviously better than the water quality that electrolytic process is processed, and can meet IMO standard-required.
Accompanying drawing explanation
Fig. 1 is the schematic diagram for the treatment of system of the present invention;
Fig. 2 is with the partial schematic diagram of the pipeline of control valve in treatment system of the present invention;
Fig. 3 is with the partial schematic diagram of the pipeline of control valve and under meter in treatment system of the present invention;
Wherein, description of reference numerals is as follows: 1, equalizing tank; 2, film treating pond; 3, life afloat sewage water inlet pipe line; 4, electrolyzer; 5, seawater back with water inlet line; 6, Graceful water pipeline; 7, MBR membrane module; 8, equalizing tank water outlet pipeline; 9, shredding unit; 10, mud vent line; 11, control device; 12, lift pump; 13, control valve; 14, under meter.
Embodiment
For making the object, technical solutions and advantages of the present invention clearer, will be further described below the technical scheme of exemplary embodiment of the present invention.
One aspect of the present invention provides a kind for the treatment of system of life afloat sewage, as shown in Figure 1, it comprises equalizing tank 1 and film treating pond 2, wherein, equalizing tank 1 is connected with life afloat sewage water inlet pipe line 3, in equalizing tank 1, be provided with electrolyzer 4, equalizing tank 1 is also connected with for supplying with the seawater back with water inlet line 5 of seawater, and equalizing tank 1 is for carrying out electrolytic process processing to described life afloat sewage.Film treating pond 2 is connected with the Graceful water pipeline 6 of processing rear clear water for discharging, in film treating pond 2, be provided with one or more groups MBR membrane module 7, film treating pond 2 is for the water outlet of equalizing tank is carried out to filtration treatment by MBR membrane module 7, between film treating pond 2 and equalizing tank 1, by equalizing tank water outlet pipeline 8, is connected.
During above-mentioned treatment system work, first by sanitary sewage back with water inlet line 3, life afloat sewage transport is entered in equalizing tank 1, by seawater back with water inlet line 5, in equalizing tank 1, carry seawater to mix with sanitary sewage wherein, electrolyzer 4 produces hypochlorite ion by seawater electrolysis, hypochlorite ion can carry out germicidal treatment to sanitary sewage, electrolytic process produces advanced oxidation effect the organism in sewage is decomposed, sewage is precipitated to remove in equalizing tank 1 materials such as suspended substance simultaneously, after above processing, by equalizing tank 1 water outlet, by equalizing tank water outlet pipeline 8, entered in film treating pond 2.In film treating pond 2, the water outlet of equalizing tank 1 is carried out further filtration treatment by MBR membrane module 7, obtains thus the clear water water outlet of water-quality COD concentration below 30mg/L, by 6 discharges of Graceful water pipeline.
In an embodiment for the treatment of in accordance with the present invention system, for saving the floor space of described treatment system, film treating pond 2 can be arranged on equalizing tank 1, and the water outlet of equalizing tank 1 can be sent in film treating pond 2 by lift pump 12 devices such as grade.
In an embodiment for the treatment of in accordance with the present invention system, equalizing tank 1 is also provided with for pulverizing the shredding unit 9 of equalizing tank mud, and shredding unit 9 is connected with for discharging the mud vent line 10 of equalizing tank mud.
When sludge quantity in equalizing tank 1 is too much, need to discharges sludge treatment, or when film treating pond 2 keeps in repair or safeguards, also can discharge sludge treatment, to guarantee the steady running of whole treatment system.While discharging mud step, first stop the water outlet of equalizing tank 1 to send into film treating pond 2, by seawater back with water inlet line 5, to equalizing tank 1, carry seawater, electrolyzer 4 produces hypochlorite ion by seawater electrolysis, mud in equalizing tank 1 is carried out after electrolytic process germicidal treatment, the mud in equalizing tank 1 is pulverized by shredding unit 9 and discharged via mud vent line 10.
In an embodiment for the treatment of in accordance with the present invention system, on life afloat sewage water inlet pipe line 3, seawater back with water inlet line 5, equalizing tank water outlet pipeline 8, Graceful water pipeline 6 and mud vent line 10, be respectively arranged with control valve 13, as shown in Figure 2.By the adjusting of control valve, can control the flow of sanitary sewage water inlet, seawater water inlet, equalizing tank water outlet, the water outlet of film treating pond, the discharge of equalizing tank mud.The control of flow can be controlled by manual operation, also can automatically control by control device.
In an embodiment for the treatment of in accordance with the present invention system, the control valve on each pipeline is connected with control device 11 respectively, and control device can be common control device or Controlling System, as computer, PLC, micro-chip etc.
In an embodiment for the treatment of in accordance with the present invention system, on sanitary sewage back with water inlet line 3 and Graceful water pipeline 6, be also connected with under meter 14, in order to monitor flow when system is moved, as shown in Figure 3.
In above-mentioned treatment system, can set equalizing tank, film treating pond size, pipeline feed flow, each rating of set etc. according to the sewage load of different size (as the sanitary sewage disposal amount of 30 people, 50 people, 80 people, 120 people, 150 people's equal-specifications on offshore platform or boats and ships).
Treatment system of the present invention combines electrolytic process and membrane separation process, and electrolyzer wherein and MBR membrane module adopt the existing electrolyzer for marine sewage disposal and filtering film component.As electrolyzer can use the OMINPURE15MX type electrolyzer of U.S. SEVERN TRENT DE NORA company, water-quality COD concentration after this electrolyzer is processed can reach below 300mg/L, the model of MBR membrane module, quantity etc. can be carried out routine selection according to the water yield of required processing, after filtration, effluent COD concentration are controlled to 30mg/L below.
Treatment system of the present invention had both solved the not high shortcoming of electrolytic process water-quality guideline, had solved again a difficult problem for conventional MBR method stability deficiency, and system stability is good, and maintenance workload is little, and volume is small and exquisite, can be widely used in offshore platform and boats and ships.
Another aspect of the present invention provides a kind for the treatment of process of life afloat sewage, adopts treatment system provided by the invention, and it comprises the following steps:
1) pending life afloat sewage is transported in equalizing tank by life afloat sewage water inlet pipe line, by seawater back with water inlet line, to electrolyzer, supplies with seawater, by electrolyzer, use electrolytic process to process sanitary sewage, simultaneously precipitating sludge;
2) the equalizing tank water outlet after equalizing tank processing is sent in film treating pond by equalizing tank water outlet pipeline, by MBR membrane module, undertaken by Graceful water pipeline, being discharged after filtration treatment.
In an embodiment for the treatment of in accordance with the present invention method, treatment process also comprises mud discharge step, its process is as follows: stop equalizing tank water outlet to send into film treating pond, by seawater back with water inlet line, to equalizing tank, supply with seawater, by described electrolyzer, use electrolytic process to process the mud in described equalizing tank, the mud after processing is discharged by mud vent line after pulverizing by shredding unit.
In an embodiment for the treatment of in accordance with the present invention method, mud is discharged step for periodically carrying out, or carries out when described film treating pond keeps in repair or safeguards.
Can set fixing mud tap-off cycle according to water treatment situation, the mud with in periodic cleaning equalizing tank, maintains system stability.In addition in film treating pond maintenance or safeguard in the time of cannot normally carrying out sewage disposal, the mud in equalizing tank is cleared up, to save a whole maintenance time, simultaneously.
In above-mentioned sewage water treatment method, can set equalizing tank, film treating pond size, pipeline feed flow, each rating of set etc. according to the sewage load of different size (as the sanitary sewage disposal amount of 30 people, 50 people, 80 people, 120 people, 150 people's equal-specifications on offshore platform or boats and ships).
Treatment process of the present invention has adopted the treatment system that electrolytic process and membrane separation process are combined, and electrolyzer wherein and MBR membrane module adopt the existing electrolyzer for marine sewage disposal and filtering film component.As electrolyzer can use the OMINPURE15MX type electrolyzer of U.S. SEVERN TRENT DE NORA company, water-quality COD concentration after this electrolyzer is processed can reach below 300mg/L, the model of MBR membrane module, quantity etc. can be carried out routine selection according to the water yield of required processing, after filtration, effluent COD concentration are controlled to 30mg/L below.
In water outlet after disposal methods of the present invention, COD concentration can be down to below 30mg/L, can meet the emission standard of offshore production platform and Sewage from Ships, system run all right, good reliability.
Although for the present invention is described, the preferred embodiments of the invention are disclosed, but it will be understood by those of skill in the art that in the situation that do not depart from design of the present invention and the scope that claims limit, can make various modifications, interpolation and replacement to the present invention.
Claims (10)
1. a treatment system for life afloat sewage, is characterized in that, described treatment system comprises:
Equalizing tank (1), it is connected with life afloat sewage water inlet pipe line (3) and seawater back with water inlet line (5), is provided with electrolyzer (4) in described equalizing tank (1); And
Film treating pond (2), it is connected with the Graceful water pipeline (6) of processing rear clear water for discharging, is provided with one or more groups MBR membrane module (7) in described film treating pond (2);
Wherein, described film treating pond (2) is connected by equalizing tank water outlet pipeline (8) with described equalizing tank (1).
2. according to the treatment system of claim 1, it is characterized in that, described film treating pond (2) is arranged on described equalizing tank (1).
3. according to the treatment system of claim 1 or 2, it is characterized in that, described equalizing tank (1) is also provided with the shredding unit (9) for pulverizing equalizing tank mud.
4. according to the treatment system of claim 3, it is characterized in that, described shredding unit (9) is connected with for discharging the mud vent line (10) of equalizing tank mud.
5. according to the treatment system of claim 4, it is characterized in that, on described life afloat sewage water inlet pipe line, seawater back with water inlet line, equalizing tank water outlet pipeline, Graceful water pipeline and mud vent line, be respectively arranged with control valve.
6. according to the treatment system of claim 5, it is characterized in that, described control valve with for regulating the control device of pipeline flow to be connected.
7. according to the treatment system of claim 5, it is characterized in that, on described life afloat sewage water inlet pipe line and Graceful water pipeline, be also respectively arranged with under meter.
8. a treatment process for life afloat sewage, is characterized in that, adopts the treatment system of claim 1-7 any one to process life afloat sewage, comprises the following steps:
1) pending life afloat sewage is transported in equalizing tank by life afloat sewage water inlet pipe line, by seawater back with water inlet line, in described equalizing tank, supply with seawater, by electrolyzer, use electrolytic process to process described life afloat sewage, simultaneously precipitating sludge;
2) water outlet after equalizing tank processing is sent in film treating pond by equalizing tank water outlet pipeline, by MBR membrane module, undertaken by Graceful water pipeline, being discharged after filtration treatment.
9. treatment process according to Claim 8, it is characterized in that, described treatment process also comprises mud discharge step, its process is as follows: stop equalizing tank water outlet to send into film treating pond, by seawater back with water inlet line, in described equalizing tank, supply with seawater, by described electrolyzer, use electrolytic process to process the mud in described equalizing tank, the mud after processing is discharged by mud vent line after pulverizing by shredding unit.
10. according to the treatment process of claim 9, it is characterized in that, described mud is discharged step for periodically carrying out, or carries out when described film treating pond keeps in repair or safeguards.
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| CN201410042533.6A CN103755105A (en) | 2014-01-29 | 2014-01-29 | Treatment system and treatment method for marine domestic sewage |
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| CN104176861A (en) * | 2014-08-18 | 2014-12-03 | 中国海洋石油总公司 | Offshore platform domestic sewage treatment method |
| CN104291503A (en) * | 2014-09-18 | 2015-01-21 | 中国海洋石油总公司 | Electrocatalytic oxidation treatment method and treatment system for sanitary sewage of marine platform |
| CN108892335A (en) * | 2018-09-05 | 2018-11-27 | 武汉船舶职业技术学院 | A kind of processing system and its processing method in ship processing oil-containing waste water for ship |
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Inventor after: Li Dai Inventor after: Yao Shuang Inventor after: Yan Hongtao Inventor after: Zhu Weicheng Inventor after: Deng Changhong Inventor after: Wang Jianfeng Inventor after: Guan Hongxiang Inventor after: Li Yubin Inventor after: Ge Rengang Inventor after: Lei Yafei Inventor before: Li Dai Inventor before: Yao Shuang Inventor before: Yan Hongtao Inventor before: Zhu Weicheng Inventor before: Deng Changhong Inventor before: Wang Jianfeng Inventor before: Guan Hongxiang Inventor before: Li Yubin Inventor before: Ge Rengang Inventor before: Lei Yafei |
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Application publication date: 20140430 |