KR20130026715A - Sewage treatment system and sewage treatment method of the same - Google Patents

Sewage treatment system and sewage treatment method of the same Download PDF

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Publication number
KR20130026715A
KR20130026715A KR1020110090044A KR20110090044A KR20130026715A KR 20130026715 A KR20130026715 A KR 20130026715A KR 1020110090044 A KR1020110090044 A KR 1020110090044A KR 20110090044 A KR20110090044 A KR 20110090044A KR 20130026715 A KR20130026715 A KR 20130026715A
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KR
South Korea
Prior art keywords
sewage
wastewater
storage tank
discharge pump
sewage treatment
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Application number
KR1020110090044A
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Korean (ko)
Inventor
김보람
조성균
조원영
하한경
Original Assignee
대우조선해양 주식회사
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Priority to KR1020110090044A priority Critical patent/KR20130026715A/en
Publication of KR20130026715A publication Critical patent/KR20130026715A/en

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    • 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
    • C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
    • 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
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5209—Regulation methods for flocculation or precipitation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/001—Build in apparatus for autonomous on board water supply and wastewater treatment (e.g. for aircrafts, cruiseships, oil drilling platforms, railway trains, space stations)
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/002—Construction details of the apparatus
    • C02F2201/005—Valves
    • 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
    • C02F2209/42—Liquid level

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  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Water Supply & Treatment (AREA)
  • Hydrology & Water Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Toxicology (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Biological Treatment Of Waste Water (AREA)

Abstract

PURPOSE: A wastewater processing system and a method are provided to store wastewater in a wastewater storage tank in case of breakdown or cleaning of the wastewater processing system, and to reduce loss in costs and spaces as the stored wastewater is dischargeable through a discharge pump of a wastewater processing unit. CONSTITUTION: A wastewater processing system comprises a wastewater processing unit(10), a wastewater storage tank(20), a valve, and a pipe(L). The wastewater processing unit purifies wastewater generated from a sea structure, and discharges purified processing water through a discharge pump. The valve supplies the wastewater to one among the wastewater processing unit and the wastewater storage tank. The pipe connects the wastewater storage tank and the discharge pump. The wastewater stored in the wastewater storage tank is discharged outside through the discharge pump connected to the pipe when the wastewater processing unit is broken or is under cleaning. A water level sensor(143) is installed in the wastewater storage tank and the wastewater is discharged through the discharge pump once the wastewater reaches certain water level by the water level detection of the water level sensor.

Description

Sewage treatment system and its sewage treatment method {SEWAGE TREATMENT SYSTEM AND SEWAGE TREATMENT METHOD OF THE SAME}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewage treatment system and a sewage treatment method thereof, and in particular, a sewage treatment system and its sewage treatment which enable discharge of treated water or sewage outboard through a discharge pump connected to a sewage treatment apparatus and a sewage storage tank. It is about a method.

Sewage generated in ships is divided into toilets, urine and waste water (Black Water), and various wastes and gray water from wash basins, bathtubs and galleries. In accordance with the Marine Pollution Prevention Act, the sewage treatment system should be disposed of properly.

Generally, the sewage treatment method in ships is a sewage treatment method by biologically active sludge to be decomposed by microorganisms in a suspended growth state in a tank into which the sewage is introduced, and sewage by electrochemical. There is a processing method.

The biochemical sewage treatment apparatus is mixed with a predetermined amount of activated sludge (Sludeg) for a predetermined time and then separated and sterilized before discharge. In dissolved oxygen, microorganisms (bacteria, etc.) use manure as food, and organic matter, which accounts for more than 95% of the manure, is converted to water and carbon dioxide by the production of microorganisms. The treatment process in the sewage treatment system is almost completely processed by supplying air to the manure so that microorganisms can be produced more rapidly than natural water, and the suspended solids remaining in the treated water are removed by gravity clean and Water is transferred to an isolated disinfection tank for disinfection and discharge.

The electrolytic sewage treatment device is an electrode reaction of oxidation, reduction, decomposition and precipitation by the exchange of electrons directly at the interface between the electrode and the solution when electric energy is supplied through the electrode plate submerged in the sewage containing electrolyte (sea water, salt). Sewage is treated by oxidation reactions with hypochlorous acid (HCIO), ammonium (O 3 ), and the like.

Conventional sewage treatment systems store sewage in sewage storage tanks in the event of failure or cleaning of the biochemical method or electrolytic sewage treatment system described above, and discharge the stored wastewater through a dedicated discharge pump connected to the sewage storage tank. Doing.

Accordingly, the conventional sewage treatment system not only has a cost burden of installing an expensive dedicated discharge pump in order to discharge the sewage stored in the sewage storage tank, but also requires a space for installing the dedicated discharge pump inside the narrow hull. It is the situation.

SUMMARY OF THE INVENTION An object of the present invention is to provide a sewage treatment system and a sewage treatment method thereof which enable discharge of treated water or sewage outboard through one discharge pump connected to a sewage treatment apparatus and a sewage storage tank.

According to an embodiment of the present invention for achieving the above object, a sewage treatment system for treating sewage generated in the offshore structure, the sewage treatment apparatus for purifying the sewage, and discharges the purified treated water through a discharge pump; A sewage storage tank for storing the sewage, a valve for supplying sewage to any one of the sewage treatment apparatus and the sewage storage tank, and a pipe connecting the sewage storage tank and the discharge pump; In the event of a failure or cleaning of the treatment apparatus, a sewage treatment system is provided which discharges sewage stored in the sewage storage tank through the discharge pump connected to the pipe.

The sewage treatment apparatus includes a reaction tank for decomposing sewage introduced through an inlet; A settling tank which precipitates the first treated water passing through the reaction tank and separates the second treated water and the precipitate; A filtration tank configured to pass the secondary treated water passing through the settling tank through a filter medium therein to decompose suspended matter or untreated organic matter of the secondary treated water; And a disinfection tank for mixing the disinfectant with the tertiary treatment water that has passed through the filtration tank, and preferably discharges the fourth treatment water that has passed through the disinfection tank to the outboard through the discharge pump.

The sewage storage tank is installed inside the water level sensor, it is preferable to discharge the sewage outboard through the discharge pump when the internal sewage reaches the set level by the water level detection of the water level sensor.

It is preferable that a sewage control valve is installed between the sewage storage tank and the discharge pump to control discharge of stored sewage.

In addition, according to another embodiment of the present invention, a sewage treatment method of a sewage treatment system for treating sewage generated in an offshore structure, the failure of the sewage treatment apparatus for purifying the sewage and discharge the purified treated water through a discharge pump Storing the sewage in a sewage storage tank; And discharging the stored sewage outboard through the discharge pump.

According to the present invention, there is an effect of discharging the treated water or the sewage outboard through one discharge pump connected to the sewage treatment device and the sewage storage tank. As a result, when the wastewater treatment apparatus breaks down or is cleaned, the wastewater can be stored in the wastewater storage tank and the stored wastewater can be discharged to the outboard through the discharge pump of the wastewater treatment apparatus, thereby reducing the loss in cost and space. Can be.

1 is a view for explaining a sewage treatment system according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a view for explaining a sewage treatment system according to an embodiment of the present invention.

Referring to FIG. 1, a sewage treatment system according to an embodiment of the present invention includes a sewage treatment apparatus 10 for purifying sewage and discharging the treated water outboard, a sewage storage tank 20 for storing sewage, and , Discharge pump 30 for discharging the treated water or sewage of the sewage treatment apparatus 10 and the sewage storage tank 20 to the outboard, and the like.

The sewage treatment apparatus 10 of the present invention adopts a biochemical treatment method, and discharges the treated water passing through the reaction tank 11, the settling tank 12, the filtration tank 13, and the settling tank 14 to the discharge pump 30. Can be discharged outboard.

In detail, the reaction tank 11 which primarily processes the sewage in a microbial decomposition method is formed with an inlet 111 through which the sewage flows into the reaction tank 11 upwardly and is introduced into the reactor 11 under the inlet 111. A screen 112 is formed which physically catches the sewage.

The sewage filtered through the screen 112 is in contact with a plurality of contact media 113 having a concave-convex shape disposed under the screen 112 and having various kinds of microorganisms (various bacteria, aerobic, random and anaerobic) attached to the surface. It is broken down by microorganisms.

Since the contact filter 113 is attached to a variety of microorganisms of various types than the active sludge, it is possible to decompose more organic materials and to cope with the unevenness (excess inflow or lack of inflow) of the sewage supply.

At this time, in order to activate the microbial decomposition action of the reaction medium from the blower 131 to be described later, an air diffuser 114 for supplying air into the reaction tank 11 is installed below the contact medium 113, that is, the bottom side of the reaction tank 11. (11) It supplies air to the inside.

The air vent 115 for discharging the gas generated by the decomposition of the microorganisms to the outside of the reactor 11, a manhole (not shown) for the internal cleaning operation is formed, which will be apparent to those skilled in the art, so a detailed description thereof will be omitted. Shall be.

More preferably, the diffuser 114 may use a ball type diffuser to prevent the blockage of pipes due to backflow of air and foreign matters, thereby facilitating maintenance.

The first treatment water treated through the microbial decomposition process of the sewage introduced into the reaction tank 11 is introduced into the settling tank 12, and the first treated water introduced into the settling tank 12 undergoes a settling time of about 2 hours. Separated into secondary treated water and sediment. That is, the suspended matter or untreated organic matter is collected as a sediment to the lower side of the sedimentation tank 12, and the secondary treated water on the upper portion of the sediment is introduced into the filtration tank 13 which performs the tertiary treatment step.

At this time, the accumulated sediment of the lower part of the sedimentation tank 12 may be transferred to the sludge tank by using a separate sludge pump, but the sediment is transferred to the inlet 111 of the reaction tank 11 to minimize the sludge generated by the sewage treatment. It is preferable to perform the relysis process using.

To this end, the sediment transfer pipe 116 is installed and connected to the inlet 111 of the reaction tank 11 from the bottom of the sedimentation tank 12, and the precipitate is forcedly supplied from the blower 131 into the sediment transfer pipe 116. It is desirable to transfer the sediment using an airlift pumping method that allows it to be transported. By using air lift pumping, it is possible not only to facilitate the installation of the sediment transport pipe 116 and the sediment transport, but also to solve the air supply for microbial decomposition.

Secondary treated water passing through the settling tank 12 is introduced into the filter tank 13 filled with the filter medium therein to adsorb suspended matter or untreated organic matter inside the secondary treated water through the filter medium, and the filter medium is inexpensive and adsorptive. It is desirable to use superior activated carbon.

The activated carbon can be used to completely remove contaminants in the secondary treated water, and to lower the COD (Chemical Oxygen Demand) value that cannot be solved in the reactor 11, thereby obtaining good water quality.

By installing the air supply pipe 132 connected from the blower 131 to the inner bottom side of the filtration tank 13 to supply air into the filtration tank 13 to facilitate the decomposition of untreated organic matter and suspended solids contained in the secondary treatment water. The COD value can be lowered.

The tertiary treated water from which suspended solids or untreated organic matter is removed by passing through the filtration tank 13 is introduced into the disinfection tank 14 to perform a fourth treatment process for sterilizing bacteria including E. coli.

Outside the sterilization tank 14, a chemical tank 141 with a disinfectant and a chemical pump 142 for supplying a disinfectant in the chemical tank 141 are installed to inject the disinfectant into the third treatment water introduced into the disinfecting tank 14. , The tertiary treatment water is sterilized by mixing. At this time, a plurality of water level sensors 143 are installed in the disinfection tank 14 in the vertical direction to receive a signal from the water level sensor 143 which detects when the fourth treatment water that has been disinfected reaches a set level, and then disinfects the tank 14. The fourth treated water of the discharge through the discharge pump 30 to the outboard. The outboard may be ocean.

As described above, when the sewage treatment apparatus 10 that cleans the sewage and discharges the purified water through the discharge pump 30, the sewage supply valve is configured to store the sewage in the sewage storage tank 20. Control B 1 ). Here, the wastewater supply valve B 1 may be a three way valve.

By a controller included in the sewage treatment system, the sewage supply valve is configured to supply the sewage to the formal operation sewage treatment apparatus 10 and to supply the sewage to the sewage storage tank 20 when the sewage treatment apparatus 10 is broken or cleaned. (B 1 ) can be controlled.

A pipe L is installed to connect the sewage storage tank 20 and the discharge pump 30 of the sewage treatment apparatus 10. In addition, a sewage control valve (B 3 ) that can adjust the discharge degree of the sewage stored in the sewage storage tank 20 is installed.

In addition, the sewage storage tank 20 may be provided with a plurality of water level sensors (not shown) in the vertical direction. The level sensor detects when the sewage reaches the set level.

The controller included in the sewage treatment system controls the sewage control valve B 3 installed below the sewage storage tank 20 according to a detection signal received from a water level sensor installed inside the sewage storage tank 20 to discharge the sewage pump. Through 30, it can be discharged outboard. Here, the outboard may be a floating offshore structure receiving sewage, not the ocean. Floating offshore structures receiving sewage may have a sewage treatment apparatus that operates normally. Sewage discharged through the discharge pump 30 may be transported to other supply vessels and processed after transport to land, or may be treated by a floating offshore structure equipped with a normally operated sewage treatment device.

In the present specification, a floating floating structure means a structure including both a storage tank for storing a liquefied gas such as LNG or LPG and an oil storage tank for storing oil, (LNG transport), LNG RV (LNG Regasification Vessel), as well as OIL FPSO, LNG FSRU (Floating Storage and Regasification Unit), as well as LNG FPSO (Floating, Production, Storage and Offloading) .

The sewage treatment method of the sewage treatment system having such a configuration will be described below.

In the normal operation of the sewage treatment apparatus 10, the sewage generated in the floating offshore structure is purified through the sewage treatment apparatus 10, and the purified treated water is discharged outboard through the discharge pump 30.

When the wastewater treatment device 10 is broken or cleaned, the wastewater supply valve B 1 is intermitted so that the wastewater flows into the wastewater storage tank 20.

When the sewage stored in the sewage storage tank 20 reaches a predetermined level, the sewage stored in the sewage storage tank 20 is discharged to the outboard through the discharge pump 30.

Accordingly, the conventional dedicated discharge pump is installed by discharging the sewage stored in the sewage storage tank 20 to the outboard through the discharge pump 30 installed in the sewage treatment apparatus 10 when the sewage treatment apparatus 10 is broken down or cleaned. This reduces the cost and space losses incurred.

The invention being thus described, it will be obvious that the same way may be varied in many ways. Such modifications are intended to be within the spirit and scope of the invention as defined by the appended claims.

10: sewage treatment apparatus 11: reactor
12: sedimentation tank 13: filtration tank
14: disinfection tank 20: sewage storage tank
30: discharge pump L: piping

Claims (5)

A sewage treatment system for treating sewage generated in offshore structures,
A sewage treatment device for purifying the sewage and discharging the treated water through a discharge pump;
A sewage storage tank for storing the sewage,
A valve for supplying wastewater to any one of the wastewater treatment apparatus and the wastewater storage tank;
Including a pipe connecting the sewage storage tank and the discharge pump,
When the sewage treatment apparatus breaks down or is cleaned, the sewage treatment system is discharged to the outboard through the discharge pump connected to the pipe to the waste water stored in the sewage storage tank. The method according to claim 1,
The sewage treatment device
Reactor for decomposing wastewater introduced through the inlet;
A settling tank which precipitates the first treated water passing through the reaction tank and separates the second treated water and the precipitate;
A filtration tank configured to pass the secondary treated water passing through the settling tank through a filter medium therein to decompose suspended matter or untreated organic matter of the secondary treated water; And
Including a disinfecting tank for mixing the disinfectant in the tertiary treatment water passed through the filtration tank,
Sewage treatment system, characterized in that for discharging the fourth treatment water passing through the disinfection tank outboard through the discharge pump. The method according to claim 1,
The sewage storage tank is installed inside the water level sensor,
The sewage treatment system, characterized in that for discharging the sewage outboard through the discharge pump when the internal sewage reaches the set level by detecting the water level of the water level sensor. The method according to claim 1,
Sewage treatment system, characterized in that installed between the sewage storage tank and the discharge pump sewage control valve for controlling the discharge of stored sewage. A sewage treatment method of a sewage treatment system for treating sewage generated in an offshore structure,
Storing the sewage in a sewage storage tank when the sewage treatment apparatus that purifies the sewage and discharges the purified water through a discharge pump; And
And discharging the stored sewage outboard through the discharge pump.
KR1020110090044A 2011-09-06 2011-09-06 Sewage treatment system and sewage treatment method of the same KR20130026715A (en)

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KR1020110090044A KR20130026715A (en) 2011-09-06 2011-09-06 Sewage treatment system and sewage treatment method of the same

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KR1020110090044A KR20130026715A (en) 2011-09-06 2011-09-06 Sewage treatment system and sewage treatment method of the same

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KR20130026715A true KR20130026715A (en) 2013-03-14

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160003486U (en) * 2015-03-30 2016-10-10 이민 지앙 Treatment equipment of domestic sewage
CN114671501A (en) * 2020-12-24 2022-06-28 格林生态环境有限公司 A precipitation equipment for sewage treatment
CN115403165A (en) * 2022-09-06 2022-11-29 海南亿昌环境工程有限公司 Environment-friendly sewage treatment plant

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160003486U (en) * 2015-03-30 2016-10-10 이민 지앙 Treatment equipment of domestic sewage
CN114671501A (en) * 2020-12-24 2022-06-28 格林生态环境有限公司 A precipitation equipment for sewage treatment
CN114671501B (en) * 2020-12-24 2023-09-01 格林生态环境有限公司 Sedimentation equipment for sewage treatment
CN115403165A (en) * 2022-09-06 2022-11-29 海南亿昌环境工程有限公司 Environment-friendly sewage treatment plant

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