KR20020089393A - Clarifier of wastewater and method of clarification thereof - Google Patents

Abstract

PURPOSE: An apparatus for purifying the sewage and the waste water and its method are provided, to increase the treatment velocity of the sewage and the waste water compared with the filtration method using sand by 7-8 times or more, thereby improving the treating capacity of the sewage and the waste water, to enhance the removing rate of the organic materials and the floating materials, and to allow the slag ball to be recycled. CONSTITUTION: The apparatus(A) comprises a filter-phase reactor(2) charged with the atomizing-treated slag ball(1), and the sewage and the waste water is filtered and purified by passing the slag ball layer. The filter-phase reactor comprises a tank(3) for supplying the treated sewage and the waste water into the filter-phase reactor, and a tank(4) for collecting the water treated at the filter-phase reactor. The filter-phase reactor contains a back washing pump(5) for allowing the slag ball to be washed at the under part, and a transmitting valve(21) for transmitting the back washed water into a storage tank(6) at the upper part. Preferably the filter-phase reactor is loaded inside of the waterways to allow the water to be filtered by passing it.

Description

Wastewater purification device and its purification method {CLARIFIER OF WASTEWATER AND METHOD OF CLARIFICATION THEREOF}

As industrial advancement worldwide, various kinds of industrial wastes are generated, and these industrial wastes are indiscriminately destroying natural ecosystems around the globe, and environmental destruction is accelerating in the aftermath of the destruction of natural ecosystems. The impact of destruction is becoming more and more threatened, and even human rights to survive are now threatened. Especially, due to such industrial waste, the water necessary for human survival is severely polluted, and the daily wastewater generated from the growing family life, Plant wastewater from dyeing factories, leather factories, etc., agricultural and livestock wastewater from livestock farming, etc. are polluting rivers and groundwater, making it difficult for mankind to exist. Is becoming a challenge, and these problems A situation that strives to connect.

In order to purify such waste water, waste water is collected in a separate waste water treatment plant to treat waste. The most common method for treating wastewater is chemical treatment, which is purified by adding chemicals to the wastewater.However, this method has a high maintenance cost due to the input of chemicals and causes secondary pollution due to the input of chemicals. There was a problem that excessive cost is required for the treatment of the sludge generated. In addition, the filtration method used as a physical treatment method is to pass gravel, sand, and charcoal, which delays the treatment time and decreases the purification efficiency. In particular, the sand used in the filter paper cannot be reprocessed. There is a problem that generates other waste, and other facilities, such as mixed paper and flocculation paper is required, which requires a lot of maintenance and difficult to remove small substances in the ionic state.

The present invention relates to a wastewater purification system for purifying wastewater using steelmaking slag, and more specifically, to an organic material contained in wastewater using magnetic and static electricity that the atomized steelmaking slag has on its own and It is possible to effectively remove suspended solids, which greatly reduces the cost of wastewater purification, while greatly improving the purification efficiency and using the steelmaking slag ball that does not generate other pollutants. It is about.

An object of the present invention is to solve this problem by using the steelmaking slag ball which can treat the wastewater at low cost by using the spherical steel slag ball atomized treated by cooling the steelmaking slag in the water jet stream. It is to provide a waste water purification method and a waste water purification device to purify.

Another object of the present invention is to cool the steelmaking slag in the water jet stream and to treat the wastewater using the spherical steelmaking slag ball atomized, so that the purification equipment is drastically reduced to purify the wastewater at low cost. To provide a possible wastewater purification method and a wastewater purification apparatus.

Another object of the present invention is to be able to treat the waste water by using the steelmaking slag ball excellent atomization durability when the waste water purification, it is possible to reuse the used steelmaking slag ball repeatedly, significantly reducing the maintenance cost It is to provide a wastewater purification method and a wastewater purification apparatus that is reduced to a second source and no secondary pollutant is generated.

It is still another object of the present invention to provide a wastewater purification method and a wastewater purification apparatus, which make it possible to purify wastewater and reuse the treated water again.

This object of the present invention is to fill the steelmaking slag ball atomized in the filtration tank and to pass the wastewater in the filtration tank, the suspended solids and organic matter contained in the wastewater is electrodeposited on the steelmaking slag ball (floating) It is achieved by a wastewater purification method and a wastewater purification apparatus for purifying wastewater using steelmaking slag balls according to the present invention that can be removed.

Wastewater purification method and atomized water purification apparatus by atomizing steelmaking slag ball according to the present invention will be clearly understood by the embodiments described in detail below with reference to the accompanying drawings.

In the wastewater purification apparatus A in which an atomized steelmaking slag ball (hereinafter referred to as slag ball) according to an embodiment of the present invention is used, the slag ball 1 is filled with a slag ball 1 as shown in FIG. The formed filter bed reactor (2), an equalization tank (3) for supplying influent wastewater to be treated to the filter bed reactor (2), and a treated water tank (4) for collecting the treated water treated in the filter bed reactor (2). It includes. The back washing pump 5 is installed at the lower part of the filter bed reactor 2 so as to wash the slag ball 1, and the back washing water is discharged at the upper part of the filter bed reactor 2 so that the back washing water storage tank 6 is provided. A delivery valve 21 which is sent out to the gas is provided.

The slag ball (1) has a crystal structure like glass because the steel slag melted in the converter is quenched by passing the steelmaking slag in the jet stream in which water is sprayed and quenched at the same time to perform the atomizing treatment spinel occurs. This spinel structure is generally Vickers hardness 740, which is a slag transformed into minerals with strong weathering and water resistance, and is made of slag produced during steelmaking. Therefore, the spinel structure contains Fe2O₃, which is magnetic. It is a charge (-) structure, and its component is composed of Ca 42 ~ 63wt%, Fe2O₃22 ~ 35wt%, SiO₂9 ~ 11wt%, MgO 6 ~ 9wt%, FeO 3wt% residual Fe, but the component range is slightly Of course, there may be deviations.

When the contaminated wastewater is introduced into the filter bed reactor 2 to which the slag ball of the present invention is administered, suspended matter or organic matter in the wastewater comes into contact with or comes into contact with the slag ball, and at this time, the surface of the slag ball 1 has a negative charge. Therefore, the part of the colloid in the wastewater, which is close to the slag ball 1, is positively charged, and the opposite side of the colloid is negatively charged and is electrodeposited on the surface of the slag ball 1, and the negative side of the colloid electrodeposited on the surface of the slag ball 1 Since the other colloids are electrodeposited again, the process of electrodepositing the suspended solids, chromatic substances and cations in the waste water on the slag ball 1 is repeated.

As described above, the wastewater purification system using the atomized slag ball according to the present invention fills the atomized steelmaking slag ball in the filtration tank, and when the wastewater passes through the filtration tank, the suspended solids and organic matter contained in the wastewater are made into the steelmaking slag. It is electrodeposited on the ball to remove suspended matter and organic matter, and the treatment time of waste water is 7 to 8 times faster than the conventional filtration method using sand, which greatly increases the treatment capacity of waste water. The removal rate of suspended solids is much higher than that of the conventional method, and the effect of color removal is excellent at 90% or more, the removal rate of suspended solids (SS) is excellent at 95% or more and the sludge dewatering is excellent. It is possible to make the treatment of sludge easier because it is not mixed with sand or other things. It is possible to recycle the slag ball after filtration by using the back washing pump formed under the filtration, and it is possible to clean and reuse the sludge adhering to the slag ball. It is possible to reuse, reducing maintenance costs and having a dramatic effect without the occurrence of secondary pollution due to waste water purification.

In addition, as shown in Figure 3, from the above effects by creating a barrier (B) filled with the atomized slag ball in the flow of the river water (W) to make the natural water flow through the river water breakthrough pollution of the river water at a low cost It will have the effect of improving.

<Brief Description of Drawings>

1 is an explanatory diagram showing the principle of filtration and color removal by atomizing steelmaking slag ball according to the present invention;

Figure 2 is a schematic diagram of a wastewater purification apparatus using atomized steelmaking slag ball according to an embodiment of the present invention

Figure 3 is an installation of the wastewater purification apparatus using the steelmaking slag ball installed in the river according to another embodiment of the present invention

<Mode for carrying out the invention>

Water passing through the filter bed reactor having the purification process by slag ball shows the following filtration test results.

The waste water before the filtration treatment has a chemical oxygen demand (COD) of 61.02, total organic carbon (TOC) of 22.73, suspended solids (SS) of 24.22, NH₄-N of 45.24, total nitrogen (TN) of 50.22, and phosphorus in water. (TP) was 6.13, chromaticity 495 NTU, Ca 60.1, Mg 10.2, and Fe 0.98. (Unit is mg / L)

This was passed through the filter bed reactor (2) filled with slag balls (diameter 0.5 mm to 1.5 mm) (1) in about 10 minutes and the components were measured. As a result, COD 29.75, TOC 12.54, SS 8.8, NH₄-N 22.50, TN 23.32, TP 0.54, chromaticity 72 NTU, Ca 79.8, Mg 1.02, Fe 0.11 were detected.

Comparative Example

The waste water before the filtration process has a chemical oxygen demand (COD) of 57.55, total organic carbon (TOC) of 21.80, suspended solids (SS) of 22.95, NH₄-N of 40.84, total nitrogen (TN) of 46.52, and phosphorus in water. (TP) was 6.45, chromaticity 484 NTU, Ca 60.0, Mg 10.1, Fe 1.12 (unit is mg / L)

This was measured by passing through a sand (diameter 0.45mm ~ 0.7mm) and a filter filled with gravel and charcoal in about 90 minutes. COD 45.98, TOC 17.20, SS 13.0, NH₄-N 32.69, TN 36.12, TP 1.93, chromaticity 132 NTU, Ca 76.2, Mg 8.40, Fe 0.68 were detected.

Comparing the above results, the treatment time of the waste water is 7 to 8 times faster than the conventional filtration method using sand, which greatly increases the treatment capacity of the waste water, and the removal rate of organic matter and suspended solids is higher than that of the conventional method. It is much higher, the color removal effect is more than 90%, the removal rate is more than 95%, the sludge desorption is excellent, and the sludge produced can be easily separated and the sludge is not mixed with sand or other things. It is easy and it is possible to clean and reuse the sludge adhering to the slag ball using a backwash pump formed below the slag ball after filtration.

As described above, the present invention can be widely used in a factory or a concentrated industrial field for generating general wastewater, and of course, it becomes possible to purify rivers, rivers, lakes, etc., which are becoming increasingly polluted at low cost.

Claims (5)

And a filtration bed reactor packed with atomized slag balls, wherein waste water is filtered while passing through the slag ball bed. According to claim 1, wherein the filter bed reactor is provided with an equalization tank for supplying the influent wastewater treated to the filter bed reactor and a treatment tank for collecting the treated water treated in the filter bed reactor is further provided in the lower portion of the filter bed reactor A backwash pump is installed to wash the slag ball layer, and a wastewater purification apparatus is installed at an upper portion of the filtration reactor so that a backwash water is discharged and sent to a backwash water storage tank. The wastewater purification apparatus according to claim 1, wherein the filter bed reactor filled with atomized slag balls is installed in the stream to be filtered while the stream water to be purified is passed. Wastewater purification method characterized in that the wastewater is passed through the atomized slag ball layer to remove contaminants contained in the wastewater. The wastewater purification method according to claim 4, wherein the atomized slag ball layer is installed in the stream and filtered as the river water passes.