We Cherish People, We Cherish the Environment
Sinsung Plant
A processing facility that purifies waste water that has played its role in houses, public organizations, commerce and industrial facilities. Since the modern industrial waste water disposal has diverse icons according to property of used raw materials and production processes, advanced technology such as precise analysis of pollution sources, pilot test for efficient processing process adoption and economic design is required.
According to this, diverse waste water processing facility by industry must be designed and constructed and by selectively constructing physical, chemical and biological processing facility matching the site conditions, a pleasant, economically feasible and stable waste water disposal plant must be realized. The best waste water processing system considering the maintenance side, optimum working environment and conditions from start to the end must be applied. The new plant must discover the property and emitting icon of the emitting facility and must design and construct based on the accumulated design and experience. By guaranteeing the reliability of the result and making the maintenance easy, the maintenance costs can be greatly decreased.
Waste Water Facility Design Process
Construction Method of Waste Water Processing Facility
Physical Processing Facility | Chemical Processing Facility | Biological Processing Facility | Advanced Processing Facility |
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Physical Processing Facility
As the first stage of waste water processing, it protects damage of pump and machines due to diverse impurities entered with the water and is a required device for the maintenance of mass balance within the waterway. It is screened in the form of manual bar screen, mechanical screen, micro screen and screw pump
It prevents damage such as pumps due to pebbles, sand, vinyl and other metals within the waste water as well as preventing closing of the pipe. By preventing it being accumulated in the after process (aeration tank, settling chamber, digestion tank etc.) it is installed to preserve processing efficiency and there are horizontal, vertical and aeration methods.
By removing oil from the waste water, it is a device that allows the smooth maintenance of processing function being implemented afterwards and its types include baffle/API/PPI and CPI method.
As a device that minimizes change of flow and concentration of waste water due to passing of time, it control flow through the forms of sump (equalization chamber), pumping chamber, processing chamber and discharge chamber.
By adding coagulant in optimum PH state to the impurities or heavy metal, which are in colloid state and area contained in the waste water, it makes the article group or forms metal hydride and makes precipitation smooth.
The flock made after chemical and biological processing is naturally sunk using gravity and has a function of separating and removing solid from liquid.
It prevents damage such as pumps due to pebbles, sand, vinyl and other metals within the waste water as well as preventing closing of the pipe. By preventing it being accumulated in the after process (aeration tank, settling chamber, digestion tank etc.) it is installed to preserve processing efficiency and there are horizontal, vertical and aeration methods.
By removing oil from the waste water, it is a device that allows the smooth maintenance of processing function being implemented afterwards and its types include baffle/API/PPI and CPI method.
As a device that minimizes change of flow and concentration of waste water due to passing of time, it control flow through the forms of sump (equalization chamber), pumping chamber, processing chamber and discharge chamber.
By adding coagulant in optimum PH state to the impurities or heavy metal, which are in colloid state and area contained in the waste water, it makes the article group or forms metal hydride and makes precipitation smooth.
Chemical Processing Facility
It is a device that adjusts optimum pH to make coagulation, oxidization and reduction easy and is used for
pH adjustment for coagulation: SS, heavy metal processing
pH adjustment for oxidization: CN processing
pH adjustment for reaction: Cr6+ processing
After injecting H2S04 to heavy metal waste water with Cr+6 so that it becomes pH2.5-pH2.8, NaHS04 is injected. As a facility that reduces this to harmless Cr3+, there is acid reduction precipitation method, ion exchange method, electrolysis reduction method.
By injecting oxidizing materials of NAOCI, CI2, HOCI, KMn04 in the waste water containing CN, it removes by decomposing to CO2 and N2. According to the oxidization method, there is alkali chlorine injection method, ozone oxidation method, ferrite method, electrolysis method and incineration method.
In this the case of waste water with pathogen or with waste water where decomposition is possible, it sterilizes just before discharge and there is sterilization with chlorine, sterilization with hypochlorite and sterilization with ozone.
It is a device that has removal function of remaining BOD, COD, deodorization and ABS regarding waste water that passes filtering facility and biochemical waste water
t is a device that changes slime ikon with chemical or physical method before or after enrichment processing to ease dehydration efficiency.
Biological Processing Facility
Trickle uniformly the waste water to be disposed using the distributor above the tank filled with pebbles, stones and plastic. Take the waste water processed in the thrashing layer to the lower sewage facility and for the removal of the passed microorganism flock, one must past the ultimate settling chamber. It is installed in the methods of standard, intermediate, and high speed and super-rate trickling methods.
By making the organic within the waste water of aerobic conditions into minerals, there is the activated sludge method as a method that removes organic materials within the waste water through the breathing and integration process by microorganisms during microorganism increase. As modifications using the activated sludge method, there is step aeration, contact stabilization, modified aeration, extended aeration and pure oxygen activated sludge
The multiple original plastic panels installed at right angles to the flow of the waste water makes the microorganisms attached on top of the original panel pass the waste water according to the axis rotating. Here, the microorganism absorbs the organic material and makes it become aerobic state. It is a device that processes by decomposing organic material due to the microorganism’s metabolism. There is the single-state rotary biological contactor and multi-stage rotary biological contactor.
By making the microorganisms grown by sticking in the HBC Ring of the lace or loop type with the organic materials in the water, the pollutants are removed. Therefore, if air is supplied in the aspect of aeration tank, the oxygen in the water is melted and due to the rise of the bubble, agitation with the polluted water occurs. Here, the microorganisms attached to the HBC Ring repeatedly contacts the pollutants in the water and leads to the oxidation and decomposition of organic pollutants. The surplus sludge coming out from anaerobic bacteria within the ring is decomposed and the sludge occurrence is ultimately decreased.
Using the microorganisms under aerobic digestion, (sometimes obligate aerobic is possible too), it oxidizes the organic sludge. The maintenance is simple and BOD concentration is low while power needed is big due to the aeration device. As methane is not produced, the energy use is restricted and as digestion sludge water percentage is high, the volume of dehydrated sludge is bigger than the anaerobic property. There are batch and continuous flow types.
It is the most frequently operated sludge method and in the anaerobic conditions, the microorganisms and methane making bacteria are used to oxidize organics sludge. There is high efficiency digestion tank, low efficiency digestion tank and second stage. Although maintenance is not as easy as the aerobic digestion facility, the power requirement and sludge occurrence is small and as there is a lot of methane occurrence, it can be used again.
Organic High Concentration Waste Water
As waste water with no harmful materials and with a high concentration of organic material, it is appropriate for general biological disposal method
By Industry | Product Name | Source of Waste Water | Quality and Quantity of Water | General Disposal Method | Note |
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Animal and Plant Maintenance Manufacturing Method | Animal maintenance, plant maintenance |
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Flotation | Be careful of emulsion separation and need to handle odor |
Medicine Manufacturing Method | Serum, vaccine, medicines, integrated medicines, vitamin, hormone, alkaloid antibiotics |
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Be careful of pH, color, smell |
Gelatine Adhesive Manufacturing | Glue Gelatine |
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Active sludge method | Be careful of smell |
Petrol Refiner | Petrol Products, Gasoline Paraffin etc. | Cleaning facility (emulsified oil, acid/alkali) |
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Organic Low Concentration Waste Water
It has comparatively low amounts of organic materials and has waste water of domestic sewage. Generally, biological disposal method is suitable. With products with a lot of oil contained, congelation reaction and flotation is both applied.
By Industry | Product Name | Source of Waste Water | Quality and Quantity of Water | General Disposal Method | Note |
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Organic Manufacturing Product Manufacture | Coal-tar product, mixed dye, dye medicine’s intermediary product fermentation and manufacturing Methanol synthetic resin |
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Flotation | Be careful of emulsion separation and need to handle odor |
Organic Processed Goods Paint Manufacturing Interface Activation Agent Manufacturing and Processing | Fatty acid, hardened oil glycerin Soap interface activation agent painting ink Cleaning agent polishing agent product |
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Be careful of pH, color, smell |
Petrol Reproduction Industry | Waste oil refining, reproduction oil |
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Active sludge method | Be careful of smell |
Petrol Refining Industry | Petrol Products, Gasoline Paraffin etc. | Cleaning Waste Water (emulsified oil, acid/alkali) |
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Waste Water with Organic Harmful Materials
Since there is harmful material in the waste water, biological disposal method is difficult. Therefore, the waste water must be thinned to the point that there is no problem with biological processing or the harmful substances must be oxidized using physical or chemical methods. After removing this, biological method can be used.
By Industry | Product Name | Source of Waste Water | Quality and Quantity of Water | General Disposal Method | Note |
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Leather manufacturing | Leather, tanning, marine leather, leather bleaching, leather dying |
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Be careful chrome sulfur compounds |
Sterilizer, Pesticide Manufacturing Agricultural Pesticide Manufacturing | Pesticide, germicide agricultural pesticides |
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Precipitation, activated Absorption or neutralization |
Removal harmful substances for each product by absorbing in the manufacturing process |
Chemical Manufacturing | Nitro Cellulose TNT |
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Active sludge method |
Inorganic General Waste Water
The waste water in this has different disposal method according to dissolved salts. The acid or alkali containing waste water is neutralized and the iron salt is precipitated and removed by hydroxides.
By Industry | Product Name | Source of Waste Water | Quality and Quantity of Water | General Disposal Method | Note |
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Chemical Fertilizers | Ammonia fertilizer Lime nitrate phosphorus fertilizer |
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Neutralization, Precipitation Method | Ammonia etc. needs third disposal |
Weapons Manufacturing Product Manufacturing | Soda manufacturing product, calcium carbide Electrographite Acid inorganic pigment Other salted inorganic Manufacturing products |
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Neutralization, Precipitation Method Be careful of pH and color | |
Metal Surface Processing | Electrolysis, polishing Almite Metal primer |
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Neutralization Precipitation Method | Be careful of waste water change |
Inorganic Harmful Material Waste Water
If the waste water dissolved cyan, cadmium, mercury, chrome, copper, zinc and arsene is accumulated in marine animals or the human body, it can cause harm so such substances are disposed of and removed in the waste water.
By Industry | Product Name | Source of Waste Water | Quality and Quantity of Water | General Disposal Method | Note |
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Electrical plating |
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Chemical disposal | Be careful of waste water change Need to process heavy metal |
Weapons Manufacturing Product Manufacturing | Soda manufacturing | Mercury electrode electrolysis facility | Mercury containing waste water |
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Alkali Manufacturing |
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Salt electrode electrolysis facility | Mercury containing waste water |
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Agricultural Pesticides Manufacturing |
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Reaction tank cleaning water | About 70g of acetic acid per 1ton product and 70g of nitric acid emitted | Neutralizing, Precipitation Ion exchange | |
Chemical Products | Nitric acid aluminum | Reaction tank cleaning water | Waste water containing high concentration nitric acid Waste water containing oil | Neutralization, Oil Removal |