KR20020082650A - A sewage and wastewater disposal system - Google Patents

Abstract

PURPOSE: A sewage/wastewater treatment system which can reduce the amount of discharged sewage/wastewater into the terminal disposal plant of sewage by treating sewage/wastewater in public facilities, apartment and large housing complex at first is provided to improve the efficiency of sewage/wastewater treatment. CONSTITUTION: The treatment system comprises a filtration tank(20) which removes adulteration and suspended matters in sewage/wastewater(10) employing sedimentation, a flow rate controller(30), an ultra filtration(U/F) bio filter(40) and fiber bio filter(50) which maximize the efficiency of contact, a pH controller(70), a sterilization tank(60) which disinfects residual sewage/wastewater with ultraviolet rays and ozone, a pump(90) which supplies sewage/wastewater to each tank, an air pump(80) which supplies U/F bio filter and fiber bio filter. The U/F bio filter and fiber bio filter is composed of circular supports(42,52) and rotary tables(41, 51).

Description

Sewage and wastewater disposal system

The present invention relates to a wastewater treatment system, and more particularly, to a wastewater treatment system for treating wastewater and wastewater discharged from public facilities, apartments, and large-scale residential complexes more efficiently by improving existing biological methods. It is about.

Sewage generated in connection with human daily life is treated in sewage purification facilities, septic tanks, sewage and wastewater treatment facilities installed in homes and industries, and agricultural and sewage treatment facilities. Korea's sewage generation amounted to 15,467 thousand tons at the end of 1998, about 17,542 thousand tons in 2000, and is gradually increasing.

Sources of wastewater and wastewater related to human life are toilets, baths and kitchens in general households and restaurants. The amount of sewage generated is proportional to the amount of water used, and the main sources of sewage are the water used during flushing toilets and daily life. The amount of sewage generated continues to increase with the increase of pollutants and water supply. Since 2000, the law on sewage, manure and livestock wastewater has regulated 10ppm regardless of the treatment capacity of sewage purification facilities.

In addition, due to industrial development, population concentration and urban diversification, the demand for water is required in large quantities. In particular, recently, large-scale apartments have been intensively increased in certain areas. Most household sewage discharged from homes is transferred to sewage treatment plants, which have been properly treated at sewage treatment plants and discharged to discharged water. However, only a few sewage treatment facilities currently installed in metropolitan areas can treat only a fraction of the total domestic wastewater discharged. In addition, due to excessive use of detergents and synthetic detergents, domestic sewage itself is discharged because it contains a large amount of substances that are difficult to be biologically decomposed.

In addition, the discharge of domestic sewage is usually an abnormal form and fluctuates over time. There is almost no change depending on the day of the week, but when you look at the fluctuations, it usually starts to increase in the morning, peaks for 2 to 3 hours, and shows a second peak pattern in the afternoon. .

Therefore, in order to compensate for the above problems, it is required to develop a process in the form of a fibrous biofilter that can cope with fluctuations in the flow of sewage that is difficult to dissolve.

The activated sludge method, which is widely used at home and abroad, is an excessively large land area, construction cost, and operation cost of the treatment plant and requires high maintenance technology. In addition, there is a problem that the sludge treatment costs due to excessive sludge generation further increases the waste water treatment costs. In addition, the removal rate of eutrophication agents such as nitrogen and phosphorus is 10-30%, and the treatment efficiency is very low, thereby causing water pollution of rivers, ports, and reservoirs.

In the case of the existing spraying water, the waste water and air are communicated between the solid particles in the same flow path, and the distribution of air is stopped during the spraying, and if the biofilm is excessively formed between the solid particles, the shutoff occurs due to the blocking of the flow path. Phenomenon occurs. In addition, when the required site is very large and must be installed outdoors, the treatment efficiency is often adversely affected by natural conditions such as winter season and heavy rain.

The present invention has been made to solve the above problems, the object of the present invention is to treat the waste water in the apartment and large housing complex itself to reduce the amount of waste water discharged to the sewage treatment plant, sewage terminal It is to provide a wastewater treatment system that can be applied not only to treatment plants but also to heavy water facilities to cope with problems caused by water shortages.

The structure of the present invention for realizing the above object is a wastewater treatment system for treating sewage and wastewater which are living sewage and wastewater discharged from public facilities, apartments and large-scale residential complexes. Simple maintenance and pre-treatment method can utilize the existing septic tank, the filter tank 20 to remove the contaminants and suspended solids by chemical precipitation of the incoming contaminants and suspended solids; A flow rate adjusting tank 30 for responding to the fluctuations in the severe inflow of the waste water 10; A hollow fiber membrane biofilter 40 tank and a fibrous biofilter 50 tank for maximizing the contact surface contact efficiency of the waste water 10; PH adjusting tank 70 for adjusting the pH of the sewage before flowing into the fibrous biofilter; A sterilization tank 60 for sterilizing the residual sewage and waste water 10 with ultraviolet and ozone; A pump (90) for supplying the waste water from each tank to the next tank; It characterized in that the air pump 80 for supplying air to the hollow fiber membrane biofilter 40 tank and the fibrous biofilter 50 tank.

Also preferably, the fibrous biofilter tank may be formed of a porous contact case in which an inner space may flow with water and bubbles, and a circular support for smoothing air flow to form an optimal condition for microbial growth. ; And a circular support for rotating the plurality of circular supports, wherein the inner space is formed as a mesh contact case through which water flow and bubbles can flow to the outside; Characterized in that it consists of a rotating body for rotating the plurality of circular support, the hollow fiber membrane biofilter 40 tank, the inner space is formed of a porous contact case that can flow and the flow and air to the outside air flow A circular support 42 for smoothly forming an optimally formed immobilized microorganism using the livestock wastewater as nutrients; Livestock is characterized in that it consists of a rotating body 41 for rotating the plurality of circular support, the inner space is formed of a mesh contact case through which the water flow and bubbles can flow to the outside to smooth the flow of air A circular support 42 for optimally forming an immobilized microorganism containing nutrients as wastewater; It is characterized by consisting of a rotating body 41 for rotating the plurality of circular support.

1 is a schematic configuration diagram of a waste water treatment system according to the present invention;

2 is a block diagram of a waste water treatment system according to an embodiment of the present invention;

Figure 3 is a rotating body of the fibrous biofilter according to an embodiment of the present invention,

Figures 4a, 4b is an illustration of a circular support according to the present invention.

<Description of Symbols for Main Parts of Drawings>

10: wastewater 20: filtration tank

30: flow control tank 40: hollow fiber membrane biofilter

50: fibrous biofilter 60: sterilization tank

70: pH adjusting tank

Hereinafter, a wastewater treatment system of the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic configuration diagram of a waste water treatment system according to the present invention.

Referring to FIG. 1, the conventional septic tank is simple to maintain and maintain by the pretreatment method of the sewage and wastewater 10, which is living and wastewater discharged from public facilities, apartments, and large-scale housing complexes, and the wastewater and wastewater 10. And a filtration tank 20 for removing the contaminants and the suspended solids by chemical precipitation of the incoming contaminants and the suspended solids, and a flow control tank 30 to cope with the fluctuations in the inflow of the wastewater 10. , The hollow fiber membrane biofilter 40 and the fibrous biofilter 50 for maximizing the contact surface efficiency of the filthy water and the wastewater 10, and the pH adjusting tank 70 for adjusting the pH of the sewage before entering the biofilter. And a sterilization tank 60 which sterilizes the residual wastewater 10 with ultraviolet rays and ozone.

Fractional molecular weight (MWCO) of the ultrafiltration membrane (U / F) biofilter 40 is 10,000 and 30,000, and has a sharp fractionation performance, and completely removes particles and microorganisms of 0.01 micron, as well as bacteria and viruses. Can be.

U / F membrane is made of polysulfone, a heat-resistant resin, so it can be used at 90 ℃ hot water, and can be used in all areas of pH 1-14.

In addition, it is not affected by microorganisms and has excellent pressure resistance and durability by the double skin structure and the buffer layer effect connecting the skin and the support layer.

2 is a configuration diagram of a wastewater treatment system according to an embodiment of the present invention, and a pump 90 for supplying wastewater to the next tank in each tank of FIG. 1, the hollow fiber membrane biofilter 40, , The air pump 80 for supplying air to the fibrous biofilter 50 is further provided.

Further, the hollow fiber membrane biofilter 40 and the rotary bodies 41 and 51 for rotating the circular supports 42 and 52 inside the fibrous biofilter 50 are provided.

Figure 3 is a rotary body of the fibrous biofilter according to an embodiment of the present invention, Figure 4a, 4b is an illustration of a circular support according to the present invention.

As shown in FIGS. 3 to 4 b, the inside of the fibrous biofilter 50 is provided with the rotary bodies 41 and 51 for rotating the circular supports 42 and 52 using the fibrous filters to optimize the contact area. While the circular supports 42 and 52 rotate, the rotating bodies 41 and 51 which form the plurality of circular supports 42 and 52 rotate at the same time. The circular supports 42 and 52 are flows of sewage. And desorption of microorganisms due to the impact of air bubbles flow by the air pump 80, and when such desorption occurs, the biological oxygen demand and the amount of suspended solids increase, and the purification capacity of the waste water is reduced.

Therefore, in the present invention, the inner space is formed of a porous or reticulated contact case through which water and bubbles can flow to the outside so that the fibrous immobilized microorganisms can be protected from the impact of filthy water and air bubbles. 52) to minimize the desorption of microorganisms. At this time, the amount of air introduced is preferably a flow rate and speed of 0.08 to 0.12 m 3 / min for each circular support 42 and 52.

In addition, the support 42, 52 is to use a fibrous filter in the support or grill mesh of the type including the holes of the plastic material.

Fibrous biofilter method is a kind of biological treatment method of trickle-water treatment. By using fibrous filter instead of existing crushed stone or gravel, it maximizes the specific surface area of microorganism and circulates air, so it is noiseless, it costs less energy and surplus sludge. It is a high efficiency sewage purification method that requires little maintenance because it does not occur.

Referring to Figs. 2 to 4B, the operation and effect of the present invention will be described. The external waste water 10 is supplied to the filtration tank 20 through the pump 90.

The filtration tank 20 removes the incoming contaminants and suspended matter, and supplies it back to the flow control tank 30 through the pump 90. The flow regulating tank 30 adjusts the amount of the wastewater 10 which varies with time, and supplies it to the biofilters 40 and 50.

The hollow fiber membrane biofilter 40 completely filters out fine particles, bacteria, and viruses, which are more efficiently filtered by the circular support 42 formed on the rotating body 41.

The wastewater filtered by the hollow fiber membrane biofilter 40 is again supplied to the fibrous biofilter 50, and the amount of the supplied wastewater is adjusted by the pH adjusting tank 70 to adjust the strain of the fibrous biofilter 50. Make it optimal.

The circular support 42 of the fibrous biofilter 40 is formed as shown in Fig. 3a or 4a to form a hole or bulge so as to exhibit the optimum purification ability of the strain and waste water, so that the specific surface area of the microorganism is very large In addition, the air supplied by the air pump 80 is directed from the inside of the circular support (42, 52) to the outside to facilitate the anaerobic and aerobic microbial habitat.

The water treated as described above is finally sterilized and disinfected by ultraviolet rays and ozone in the sterilization tank 60, and can be utilized as a water vapor as necessary.

Therefore, in the case of the existing spraying water, the waste water and air are communicated between the solid particles in the same flow path, and the distribution of air is stopped during the spraying, and when the biofilm is excessively formed between the solid particles, the blocking phenomenon occurs due to the blocking of the flow path. Although biofilm detachment occurs, the present invention using a biofilter improves efficiency compared to the conventional method by rotating the fibrous filter with a circular support and rotating with the passage of air.

In addition, as described above, when the rotary body 41 of the hollow fiber membrane biofilter 40 and the fibrous biofilter 50 is operated at 10 to 50 RPM for about 7 days, the filtered residue is adhered to the circular supports 42 and 52. Efficient removal is not possible. Accordingly, when the rotors 41 and 51 are rotated to the left and right for 2 to 5 hours at a speed of 150 to 300 RPM, which is faster than the running speed at the time of removal, the adhered residue is removed to remove the hollow fiber membrane biofilter ( 40) and the circular supports 42 and 52 of the fibrous biofilter 50 can be used continuously without replacement.

As described above, although the specific embodiment (s) have been described in the detailed description of the present invention, various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiment (s), but should be defined by the claims below and equivalents thereof.

As described above, according to the present invention, there is no complicated machine or installation without adjusting the amount of microorganisms, and thus, it is easy to operate, and since there is no separate aeration process, excessive energy is unnecessary and economical.

In addition, it can cope with severe load fluctuations of wastewater and wastewater, thereby improving treatment efficiency. Unlike conventional aeration type contact oxidation method, it uses spraying filter method to minimize the amount of excess sludge and does not design a separate sedimentation tank. There is no need for professional management, and it is possible to prepare for the coming water shortage by treating large-scale household sewage in apartments and large-scale housing complexes, as well as in sewage treatment plants or sewage water.

Claims (5)

In the sewage and wastewater treatment system for treating sewage and wastewater, which are living sewage and wastewater discharged from public facilities, apartments and large housing complexes, A pre-treatment method of the waste and wastewater 10, the maintenance of which is simple and can utilize an existing septic tank, and a filtration tank 20 for removing the contaminants and the suspended matter by chemical precipitation of the incoming impurities and suspended substances; A flow rate adjusting tank 30 for responding to the fluctuations in the severe inflow of the waste water 10; A hollow fiber membrane biofilter 40 tank and a fibrous biofilter 50 tank for maximizing the contact surface contact efficiency of the waste water 10; PH adjusting tank 70 for adjusting the pH of the sewage before flowing into the fibrous biofilter; A sterilization tank 60 for sterilizing the residual sewage and waste water 10 with ultraviolet and ozone; A pump (90) for supplying the waste water from each tank to the next tank; And a wastewater treatment system comprising an air pump (80) for supplying air to the hollow fiber membrane biofilter (40) tank and the fibrous biofilter (50) tank. The method of claim 1, wherein the fibrous biofilter tank, A circular support for forming an inner space into a porous contact case through which water flows and bubbles can flow to the outside to facilitate the flow of air to form optimum conditions for microbial growth; Waste water treatment system, characterized in that consisting of a rotating body for rotating the plurality of circular supports. The method of claim 1, wherein the fibrous biofilter tank, A circular support for forming an inner space into a mesh contact case through which water and bubbles can flow to the outside to smoothly flow air; Waste water treatment system, characterized in that consisting of a rotating body for rotating the plurality of circular supports. The method of claim 1, wherein the hollow fiber membrane biofilter 40 tank, Circular support 42 to form an internal space is made of a porous contact case that can flow and flow and bubbles to the outside to facilitate the flow of air so that the immobilized microorganisms nutrients to the livestock wastewater nutrients can be optimally formed Wow; Waste water treatment system comprising a rotating body (41) for rotating the plurality of circular supports. The method of claim 1, wherein the hollow fiber membrane biofilter 40 tank, Circular support 42 to form an internal space is made of a mesh contact case through which water and bubbles can flow to the outside to smoothly flow the air so that immobilized microorganisms nourish the incoming livestock wastewater as nutrients. Wow; Waste water treatment system comprising a rotating body (41) for rotating the plurality of circular supports.