KR100352749B1 - Waste water treatment system by sewage sludge pellet - Google Patents

Abstract

end. The technical field to which the invention described in the claims belongs.

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an apparatus for water treatment of operated water by catalytic oxidation, and more particularly, to a water treatment apparatus using a porous sintered compact sintered using sewage sludge as a medium.

I. The technical problem to be solved by the invention.

Conventional treatment processes of contact oxidation, which have been used to treat sewage or wastewater, which have not been relatively polluted in the past, are used for the treatment of sewage by the microorganism mucosa and other media, As a media used as a treatment method by the fixed bed contacting the microbial membrane and the sewage or organic matter in the wastewater by spraying or contacting the wastewater, many residues such as fine sand or sand, which are readily available in the natural state, are used. As the sewage or the solid matter in the wastewater is deposited in the media, the porosity between the media is reduced and eventually the phenomenon occurs.

All. Summary of the Solution of the Invention.

It is an object of the present invention to use a porous sintered body manufactured using sewage sludge as a medium for aquatic plant filtering and to provide a water treatment apparatus for preventing image blockage.

la. Important uses of the invention

For wastewater treatment

Description

Waste water treatment system using sewage sludge porous sintered body as filter medium {Waste water treatment system by sewage sludge pellet}

The present invention relates to an apparatus for treating sewage or wastewater by a method using a combination of natural purification and catalytic oxidation, and in particular, a porous sintered body produced by sintering and molding a sewage sludge discharged in a large amount from a sewage terminal treatment plant to an appropriate size. The upper surface of the media is a plant that can inhabit this plant, and by planting perennial aquatic plants such as reeds, the organic matter in the sewage or wastewater introduced into the stream is removed and purified to be clean water.

The Aquatic Vegetation Act, which treats sewage and wastewater with relatively low concentrations of pollutants by planting aquatic plants in the bed filled with filter media, is the most environmentally friendly water treatment method for treating water pollution caused by indiscriminate urban and environmental development. The development has been made and the development of continuous media is being made.

Conventional treatment processes of contact oxidation, which have been used to treat sewage or wastewater, which have not been relatively polluted in the past, are used for the treatment of sewage by the microorganism mucosa and other media, By spraying or contacting the waste water, it can be said to be a treatment method by the fixed phase which contacts the microbial membrane and organic matter in waste water or waste water.

Organics dissolved in the sewage or wastewater in contact with the microbial membrane are quickly decomposed by the microorganisms, and colloidal organic matter is adsorbed on the surface.

At this time, the water in the upper part of the bed has sufficient nutrients and oxygen to maintain the logarithmic growth step, but the microorganisms in the lower part do not get enough organic matter. The height of the statue cannot exceed 50 to 60 centimeters.

Conventional media used a lot of fine sand or sand that can be easily obtained in the natural state.

Between these early media, the roots of aquatic plants can grow actively, and there is a gap that can pass through the mixed sewage or wastewater into the stream, allowing smooth water treatment, but the sewage or wastewater introduced over time. As the solid material of is deposited on the media, the porosity between the media decreases and eventually occludes.

As the voids between the media are closed, the flow of sewage or wastewater is disturbed, and the oxygen supply is not possible through the bottom of the bed, which makes it difficult to treat water, such as aquatic plants not growing, dying and smelling. There was a problem, such as the need to replace all the closed or filled media can not be maintained as a water treatment facility anymore.

In addition, there is a fear of causing new pollution even when indiscriminately collected to use gravel and sand, which is a bed material that must exist absolutely for natural ecosystem and water conservation.

Accordingly, many alternative media such as plastic media have been developed in recent years.

The present applicant has a patent for the aggregate and its manufacturing method which are sintered and molded by mixing industrial wastes such as rad mud generated in a large amount when producing alumina by sewage sludge generated in sewage treatment plant and Bayer method at an appropriate ratio. 10-0234149).

The aggregate according to the invention has a property that can be used as a medium.

The present invention has been made in order to solve the above problems, using a porous sintered body manufactured using sewage sludge as a medium for the aquatic plant filter method and to provide a water treatment apparatus for preventing image blockage phenomenon. Is there.

1 is a process flow diagram according to an embodiment of the present invention.

2 is a process flow diagram according to another embodiment of the present invention.

3 is a process flow diagram according to another embodiment of the present invention.

Figure 4 is a perspective view showing the configuration of a pretreatment tank according to another embodiment of the present invention.

5 is a perspective view showing the configuration of a distribution pipe according to an embodiment of the present invention.

Figure 6 is a detailed cross-sectional view showing the configuration of the aquatic plant water tank according to the present invention.

Figure 7 is a block diagram showing an example of the configuration of the grid sediment removal pipe according to the present invention.

8 is a perspective view showing an example of the treated water outlet pipe according to the present invention.

9 is a block diagram showing the configuration of the storm water treatment tank according to another embodiment of the present invention.

Explanation of symbols on the main parts of the drawing

100: Ebi treatment tank 110: Tide tank

120: filtration tank 122: screen

130: sediment suction pump 140: aeration tank

142: screw-type aerator 200: distribution pipe

210: inlet 220: uniform distribution guide plate

230: outlet 300: aquatic plant

310: the shield 320: the shield layer

330: Media 340: Plants

350: sediment removal pipe 352: inlet hole

360: treated water outflow pipe 362: effluent control panel

400: excellent water collecting tank 410: water collecting pipe

412: triple screen 420: overflow pipe

430 treated water storage tank

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, in describing each of the drawings, the same components have the same reference numerals as much as possible even though they are shown in different drawings.

1 shows a processing system diagram according to an embodiment of the present invention. The treatment apparatus according to the present embodiment is suitable for treating a water resource having a low load of organic matter, such as river water, lake water, and mine runoff.

According to this embodiment, the wastewater treatment apparatus of the present invention has a distribution pipe 200 having an equal distribution distribution plate 210 and a plurality of outlets 220 branched in a pipe, and a high density polyethylene (HDPE) having a thickness of 1.5 millimeters (mm) or more. It consists of a water-repellent film 310 and an impermeability coefficient formed by the bottom of the water-repellent film 310 and the sewage film protection layer 320 and sewage sludge only 10 ^-5 centimeters per second (cm / sec) or mixed with other components 5 to 15 millimeters (mm) in diameter in a state of being sintered and formed with a large amount of the filter medium 330 made of a porous sintered body and the plant material 340 and the filter medium 330 and the water repellent film 310 that are planted in the filter medium. Grid sediment removal pipe 350 formed with a plurality of sediment inlet holes 352 formed of a diameter of about 4 millimeters (mm) and a treated water outlet pipe 360 having a control panel 362 to control the flow rate of the effluent. Production consists of plant yeosangjo 300.

As shown in FIG. 5, the sewage or wastewater introduced into the distribution pipe 200 through the inlet 210 formed at one side thereof is rectified by hitting the equal distribution plate 220 vertically perpendicular to the water flow and granulated at a predetermined height. After being introduced into the aquatic plant filter tank 300 through a plurality of outlets 230 formed thereafter, it is to prevent the extraction of planted aquatic plants in accordance with the rapid inflow and to process a uniform organic matter.

The protection layer 320 and the protection layer 310 may prevent the sewage or wastewater introduced into the filter tank 300 from penetrating into the surface, and may be composed of a steel structure or a reinforced concrete tank treated with waterproofing and corrosion protection.

At this time, the bottom of the filter tank 300 has a slope toward the inlet so as to induce growth according to the pollutant load of the planted aquatic plants and to allow the sediment, which precipitates the sediment, to be easily introduced into the sediment removal pipe 350. To prevent void occlusion.

The sediment removal pipe 350 is a plurality of pipes are combined in a lattice form, as shown in Figure 7 is located on the bottom of the filter tank 300 and the outer peripheral surface of the sediment removal pipe 350 is perforated at predetermined intervals A plurality of inlet holes 352 are formed.

At this time, the inlet hole 352 has a diameter smaller than the diameter of the filter medium 330 so that only the sediment can be sucked.

In addition, both ends of the sediment removal pipe 350 made of a plurality of pipes are exposed to the water phase of the filter tank so as to remove backwashing and sediment in the pipe.

Organic matter in the sewage or wastewater introduced into the aquatic plant filter tank 300 through the distribution pipe 200 as described above, the microorganisms inhabit the roots of the plant and aquatic membrane formed of a microbial group attached to the surface of the filter medium 330 Sediments digested and sedimented by the group are introduced into the inlet hole 352 by osmotic pressure and are removed according to a proper cycle.

The treated water outlet pipe 360 is located at the rear end of the aquatic plant filter tank 300 and discharged by adjusting the opening height of the outlet pipe by adjusting a screw or the like by moving the effluent control panel 362 attached up and down in the pipe. By adjusting the flow rate to be able to control the residence time of the ape water introduced into the aquatic plant filter tank (300).

Hereinafter, the time after the chemical oxygen demand (COD), total nitrogen (TN) and total phosphorus (TP), which are contaminants contained in the influent, is introduced into the aquatic plant tank 300 according to the experimental example of the present invention. As this progresses, it shows the degree of water purification.

Table 1 shows a trend of decrease in chemical oxygen demand (COD) according to an embodiment of the present invention.

According to the experimental example, the experiment was performed by changing the inflow concentration of the chemical oxygen demand under the conditions of 24 hours residence time.

Figure 1 shows the treatment efficiency according to the change in the chemical oxygen demand. When the chemical oxygen demand of the influent is 50 Pm (mg / l), the chemical oxygen demand of the effluent is 6.45 Pm (mg / l), which is 87.1 percent (%). ) Showed the treatment efficiency.

The chemical oxygen demand of the influent was 150 MP (mg / l), and the chemical oxygen demand of the effluent was 22.05 ppm (mg / l), which was 85.3 percent (%).

The chemical oxygen demand of the influent was 250 pM (mg / l), and the chemical oxygen demand of the effluent was 44 pM (mg / l), which was 82.4 percent (%).

The chemical oxygen demand of the influent was 350 pM (mg / l), and the chemical oxygen demand of the effluent was 75 pM (mg / l), which was 78.6 percent (%).

The chemical oxygen demand of the influent was 450 ppm (mg / l), and the chemical oxygen demand of the effluent was 117.9 pM (mg / l), which was 73.8 percent (%).

According to the experimental example described above, the lower the concentration of the influent, the higher the treatment efficiency, the higher the treatment efficiency up to 6 hours after the inflow, and the treatment efficiency gradually decreased, and the chemical oxygen demand of the influent was 350 pM (mg / l). ), The processing efficiency drops below 80 percent (%).

Table 2 shows a trend of decrease in total nitrogen (T-N) concentration according to an embodiment of the present invention.

According to the experimental example, the experiment was performed by changing the inflow concentration of total nitrogen (T-N) under the conditions of 24 hours residence time.

Figure 2 shows the treatment efficiency according to the change of the total nitrogen concentration. The total nitrogen concentration of the effluent is 3.178 PPM (mg / l) at 77.3 percent (%) when the total nitrogen concentration of the influent is 14 PPM (mg / l). ) Showed the treatment efficiency.

At 42 ppm (mg / l) of influent, the total nitrogen concentration of the effluent was 10.332 ppm (mg / l), which was 75.4 percent (%).

At 70 ppm (mg / l) of influent, the total nitrogen concentration of effluent was 20.37 ppm (mg / l), which was 70.9 percent (%).

At 98 ppm (mg / l) of influent, the total nitrogen concentration of effluent was 33.516 ppm (mg / l), which was 65.8 percent (%).

The total nitrogen concentration of the effluent was 48.762 ppm (mg / l), which was 61.3 percent (%) when the total nitrogen concentration of the influent was 126 ppm (mg / l).

According to the experimental example as described above, it can be seen that the treatment efficiency rapidly increases up to 6 hours in the low-concentration cities where the concentration of influent is low and increases constantly in the high-concentration cities.

Table 3 shows a trend of decreasing the total phosphorus (T-P) concentration according to an embodiment of the present invention.

According to the experimental example, the experiment was carried out by changing the inflow concentration of total phosphorus under the conditions of residence time 24 hours.

Figure 3 shows the treatment efficiency according to the change of the total phosphorus concentration. When the total phosphorus concentration of the influent is 3 pi (mg / l), the total phosphorus concentration of the effluent is 0.027 pi (mg / l), which is 99.1 percent (%). ) Showed the treatment efficiency.

The total phosphorus concentration of effluent was 0.234 ppm (mg / l), which was 97.4 percent (%) when the total phosphorus concentration of influent was 9 pi / mg.

The total phosphorus concentration of the influent was 0.585 ppm (mg / l), and the treatment efficiency was 96.1 percent (%).

At 21 ppm (mg / l) of influent, the total phosphorus concentration of effluent was 1.533 ppm (mg / l), which was 92.7 percent (%).

The total phosphorus concentration of the influent was 2.835 ppm (mg / l) and the treatment efficiency of 89.5 percent (%) was obtained when the total phosphorus concentration of the influent was 27 ppm (mg / l).

According to the experimental example as described above, the phosphorus concentration of the influent showed a treatment efficiency of 70 to 90% up to 6 hours at the beginning of the inflow, after which the treatment efficiency decreased and increased.

As described above, according to the wastewater treatment method of the present invention, when the wastewater is introduced into the wastewater by a natural purification treatment method, the wastewater sludge, which is difficult to be treated as a secondary pollution source, is recycled as an environmentally friendly pollutant. It is a useful invention that there is no fear of blockage as a treatment method.

In particular, aquatic plants must plant reeds when increasing the fill height of the media.

In the case of reeds, even if the roots are deeply planted, they can survive and spread to the roots so that microorganisms can be attached to provide a habitat for habitation.

According to another embodiment of the present invention, the sedimentation tank 110 in front of the aquatic plant filter tank 300 for treatment of wastewater having a pollution load of biological oxygen demand (BOD) or a suspended solids (SS) of 70 ppm or more (mg / l). ) And a preliminary treatment tank 100 composed of an aeration tank 140 having a filtration tank 120 having a fine screen 122 and a sediment suction pump 130 and a screw type aeration device 142.

Floating materials with a large proportion of the wastewater introduced into the sedimentation tank 110 are naturally settled.

The fine screen 122 is curved in a semi-circular shape to maximize the screen surface area, and the fine screen 122 is configured to filter out floating matters or floating substances in the inflow water.

The sediment settled in the sedimentation tank 110 and the suspended matter caught on the screen 120 are periodically removed using the sediment suction pump 130 to achieve a constant treatment efficiency.

In addition, the aeration tank 140 may increase the treatment efficiency of the subsequent aquatic plant filter tank 300 by providing aeration device such as a screw type aeration device 142 to supply oxygen consumed during the pretreatment.

According to another embodiment of the present invention further comprises a rainwater collection tank 400 and the processing excellent storage tank 430 in the aquatic plant filter tank 300 for the treatment of rainwater and the like.

The rainwater introduced into the rainwater collecting tank 400 along the water collecting pipe 410 in which the screen 412 is installed in series is introduced into the aquatic plant filter tank 300 by a method such as pumping, and then purified. According to the excellent storage tank 430 is to be used according to the intended use.

According to the water treatment apparatus using the sewage sludge porous sintered body of the present invention as described above, by using the sintered molded media using the waste sewage sludge that has been discarded, there is an effect that the waste water can be purified by a natural method.

As described above, the present invention changes the natural ecosystem generated by collecting gravel and sand, which are natural media, with the effect of preventing secondary pollution by using the sewage sludge that has been disposed of, reducing the possibility of clogging the media gap, and reducing the operating cost. The effect is to prevent.

Claims (7)

In the contact oxidation apparatus using the media as a habitat for microorganisms to treat sewage and wastewater, porosity sintered and formed with sewage sludge as a main component in the aquatic plant filter tank 300 having a predetermined width, length and depth and preventing immersion The sintered body 330 is filled with a filter medium, wastewater treatment apparatus using a sewage sludge porous sintered body as a filter medium, characterized in that the aquatic plants are planted. The method of claim 1, wherein the aquatic plant filter tank 300 is formed of clay having a predetermined slope in shear and an impermeability coefficient of at least 10 ^-5 centimeters per second and is covered with a high density polyethylene film having a thickness of at least 1.5 millimeters. Wastewater treatment device using sewage sludge porous sintered body as a medium. The wastewater treatment apparatus according to claim 1, wherein the front end of the aquatic plant filter tank (300) further includes a distribution pipe (200) for equal inflow of wastewater. The wastewater treatment apparatus according to claim 1, wherein the bottom surface of the aquatic plant filter tank (300) is further provided with a lattice-type sediment removal pipe (350) having an inclination toward the shear. The sewage sludge porous sintered body according to claim 1, further comprising a treated water outlet pipe 360 having a effluent control panel 362 for controlling the inflow amount at the rear end of the aquatic plant filter tank 300. Wastewater treatment device used as a filter. According to any one of claims 1 to 5, wherein the front end of the aquatic plant filter tank 300 is a preliminary composed of the sedimentation tank 110, the filtration tank 120, and the sediment suction pump 130 and the aeration tank 140 Wastewater treatment apparatus using the sewage sludge porous sintered body as a medium, characterized in that the treatment tank 100 is further included. According to any one of claims 1 to 5, Rainwater collection tank 400 is provided at the front end of the aquatic plant filter tank 300, and the treated water storage tank 430 is further included in the rear end is installed. Wastewater treatment system using sewage sludge porous sintered body as a medium.