KR20000002327A - Treatment method of sewage and waste water by using bottom-up filtration biological film process and its apparatus - Google Patents

Abstract

PURPOSE: A process and apparatus for treating sewage and waste water by using a bottom-up filtration biological film tank are provided which make possible to treat high loading organic matter waste water and non-biodegradable organic. CONSTITUTION: In the sewage and waste water treatment apparatus consisted of a sewage and waste water tank(10), a filtrating tank(20), an anaerobic tank(30), a denitrifying tank(40), a settling tank(70) and an effluent tank(80), a bottom-up filtration biological film tank(200) is constructed between the denitrifying tank(40) and the settling tank(70). And it has a partition wall(232), a contacting media layer(242) and a filtrating media layer(244). Also it is divided into an aerobic microorganism film contacting filtration reaction tank(210) and an aerobic contacting filtration biological film nitrification reactor(220). This is an improvement invention of Korea patent application No 1996-21273 and 1996-12160.

Description

Life sewage and oh. Wastewater treatment unit

The present invention relates to a domestic sewage and sewage and wastewater treatment apparatus, and in particular, while applying the anaerobic reaction method of submerged rotary contact filter anaerobic sewage and sewage and wastewater to apply the aerobic Xiangyang aeration aeration reaction filtration method to improve the application range and treatment efficiency. The present invention relates to a domestic sewage and wastewater treatment system that maximizes.

Generally, various sewage, industrial wastewater, and livestock wastewater (hereinafter referred to as “wastewater”) discharged from various kinds of household sewage and manure septic tanks are treated with water at all times due to environmental pollution, so that BOD (biological oxygen demand, BOD) is called. Is regulated to be discharged as low as possible, and for this, factories or large apartment complexes that discharge various wastewater and wastewater are required to install treatment facilities for wastewater and wastewater treatment. In the meantime, it is feared that serious ecosystem destruction, such as red tide and causing the death of fishes.

The present applicant has developed a wastewater treatment device of Patent No. 94,222 (Notice No. 95-13317), and the process of this device is usually fixed and loaded with MEDIA and supplied with air (oxygen). The method of cultivation and purification and the standard activity sludge method have been mainly used to shorten the residence time and reduce the site area.

This device has remarkable treatment efficiency and functionality compared to the conventional method for treating wastewater, but the method of culturing and purifying microorganisms has many problems in post-management due to excessive accumulation of sludge (microorganism). In the case of standard active sludge method, the final treatment efficiency is only about 80%, which makes it impossible to process the altitude.

Moreover, the main culprit of water pollution in Korea is the sewage and wastewater discharged due to the local characteristics of small-scale dyeing and plating plants, leather processing plants, livestock farms that raise cows and pigs in small units. In addition, since this wastewater wastewater contains a considerable amount of nitrogen (TN) and phosphorus (TP), efficient purification treatment cannot be expected with a conventional patent product.

Accordingly, the applicant of the present application filed a 'horizontal rotary contact imager' of the patent application No. 221373 in 1996 to improve the problems caused by the above-mentioned conventional patent product, it is possible to obtain a fairly good purified water quality during wastewater treatment. Had an effect. However, since the amount of contact material filled in the contact cylinder rotated horizontally has to be large in order to remove a large amount of BOD, there was another problem that the facility investment cost must be increased for large-scale sewage treatment.

Accordingly, the present applicant filed in 1998 Patent Application No. 12160, "Sewage and wastewater treatment apparatus and method using a vertical rotary contact imaging method" (hereinafter referred to as prior art).

1 shows a schematic process diagram of a wastewater treatment system according to the prior art.

The waste water treatment apparatus is composed of a waste water storage tank 10, a filtration tank 20, an aeration tank 50, a settling tank 70 and a discharge tank 80, and forms the filtration tank 20 upwards. An anaerobic tank 30 and a denitrification tank 40 are installed between the filtration tank 20 and the aeration tank 50 to decay wastewater while maintaining an airtight state of oxygen free, and between the aeration tank 50 and the settling tank 70 Install the nitriding tank 60 to be supplied to the anaerobic tank 30 and the denitrification tank 40, the aeration tank 50, the nitriding tank 60 by installing a vertical rotary contact filter biofilm device 100 respectively anaerobic tank ( 30), the denitrification tank 40, the aeration tank 50, the nitriding tank 60 is characterized by inducing the automatic drop off of the aging deposited microbial group and improved the swelling culture efficiency of microorganisms with good activity.

This prior art is simple in structure, low in facility cost, low in operation and maintenance cost according to the treatment process, and high in wastewater treatment efficiency, sedimentation property because it induces balance of oxygen supply, strong adhesion of sludge and high concentration adhesion. In this case, the aerobic aeration tank and the nitriding tank as well as the anaerobic tank and the denitrification tank were able to obtain a high treatment effect by the moderate agitation effect, the anaerobic bacteria, and the cultivation of good denitrification bacteria.

2 is a view for explaining the aerobic aeration tank and the nitride tank (50, 60) of FIG.

The aeration tank and the nitriding tank (50, 60) is the filling method of the filling medium, the air inlet 52 and the air inlet 52 connected from the underwater air 51, and the contact backrest 56 And a contact member 58 and a net 59 filled in the contact member support 56.

Such aeration tanks and nitriding tanks (50, 60) are merely a method of inducing the microorganisms by simply giving up the contact medium in the proper state, it was difficult to supply the average oxygen, and as a result, the filling contact after a long time Inside the ash, sludge was accumulated and corruption occurred. Therefore, anaerobic decomposition causes oxygen to become insufficient in the entire aeration tank, but rather adversely affects the treatment of domestic sewage and wastewater, and provides an average supply of nutrients and oxygen supply to the contact surface. This difficult problem has been found.

The present invention has been invented to solve the above problems, an object of the present invention is to apply the anaerobic reaction method and aerobic Xiang flow aeration contact filtration reaction treatment method for submerged rotational sewage and sewage of water sewage and waste water Not only does the closing phenomenon or decayed phenomena occur through the filling layer, but also the proper detachment and continuous washing of sludge activates the activities of various microbial groups while simultaneously performing the filtration role and multiple steps. In this case, the present invention is to provide living sewage and wastewater treatment devices that can maximize the wide range of application and treatment efficiency.

In order to achieve the above object, the present invention, in the waste water treatment apparatus consisting of a waste water storage tank, filtration tank, anaerobic tank, denitrification tank and sedimentation tank and discharge tank, located between the aeration tank or denitrification tank and sedimentation tank, the inside of the tank The living sewage and wastewater treatment device is characterized in that the partition wall is installed in the contact material is completely enclosed and constitutes an upward air filtration biofilm tank forming an opening into which the living sewage and the wastewater flow into the bottom part.

Therefore, according to a preferred embodiment of the present invention, the waste water passing through the denitrification tank is supplied to the upstream air-filtration membrane membrane, and operated by an underwater aerator to purify the waste water through the contact material through the opening to purify it. do.

1 is a process flow diagram schematically showing a wastewater treatment apparatus according to the prior art,

FIG. 2 is a view schematically illustrating the aeration tank of FIG. 1; FIG.

Figure 3 is a schematic diagram showing a domestic sewage and waste water treatment apparatus according to an embodiment of the present invention,

Figure 4 is a view for explaining the upstream aerated biofilm tank which is the subject of FIG.

Explanation of symbols on the main parts of the drawings

200: upward aeration membrane membrane 210: aerobic microbial membrane contact filtration tank

220: aerobic contact filtration biofilm nitriding tank 230: tank

232: partition wall 234: strainer or to stall

236: opening 238: underwater aerator

240: air intake 242: contact layer

244: Media layer

Hereinafter, the most preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention.

FIG. 3 is a schematic diagram illustrating a domestic sewage and wastewater treatment apparatus according to an embodiment of the present invention, and the same reference numerals are assigned to the same parts as in FIG. 1, and description thereof is omitted.

The present invention consists of a storage tank (10), a filtration tank (20), a co-op tank (30), a denitrification tank (40), an upward bubble air membrane reaction tank (200), a settling tank (70), and a discharge tank (80). The storage tank 90 is included while being connected with the settling tank 70.

The upstream aeration filter biofilm tank 200 is further divided into an aerobic microbial membrane contact filtration reaction tank 210 and an aerobic contact filtration biofilm nitriding reaction tank 220, which have the same structure, but have similar sewage and sewage and wastewater. It is called different because it depends on whether it reacts by car or secondary, and the reaction equations necessary for the purification reaction are different.

FIG. 4 is a view for explaining the upstream aerated biofilm tank 200 of FIG. 3.

The upward aeration filter biofilm tank 200 forms a partition wall 232 transverse to the inside of the tank 230, and is positioned about 50 cm away from the floor in any one space formed by the partition wall 232. A strainer or tostol 234 is formed in the opening, and an opening 236 is formed in a portion in contact with another space of the partition wall 232 therebetween. Then, the air aerator 238 is mounted toward the opening 236, and the ball suction port 240 is exposed to the outside even when the wastewater is filled in the tank 230 from the water aerator 238. ).

In addition, there is a layer 242 filled with a contact material on the upper side of the strainer or tostol 234, and a layer 244 filled with a filter material on the upper side thereof.

The media layer 244 may be selected as a suitable volcanic stone, crushed stone, gravel, plastics, etc., the porosity is more than 50% is better if the specific surface area is large, using a larger media at the bottom and a sand layer at the top to expand Food media treatment was applied.

In addition, in the case of a small-scale treatment plant, an expanded filtration biofilm attachment method may be applied by filling a fine particle filter such as a fine filtration strainer or a geolite in place of the tostol 234, and in this case, in an anaerobic reactor or an aerobic reactor, It can optionally be reflected in the design.

In addition, in the case of the design that does not necessarily need to be denitrification during the treatment process or does not require a high treatment efficiency, the anaerobic tank and the denitrification tank (oxygen tank) are omitted, and directly from the filtration tank 20 to the upstream aeration filter biofilm tank 200. It is possible to enable subsequent wastewater circulation.

As described above, in the present invention, when the waste and wastewater are supplied from the storage tank to the upstream aeration tank through the anaerobic tank and the denitrification tank, the wastewater is reacted with the microorganisms of the contact material upwardly through the opening formed in the partition by the underwater aerator. Each medium is filtered and spilled or recycled to the cell.

Therefore, according to the present invention, the BOD removal rate of domestic sewage and waste water may exhibit a treatment efficiency of 5 to 20 kg BOD / m ³ _· day.

That is, if 50m ² / day is applied to the present invention, 50m ² / day × 200mg × 10 ^-13 = 10 (kgBOD / day), so 10kgBOD per day is processed.

Therefore, contact filling discretion bore the BOD removal rate to the minimum even in 5kgBOD / m ³ _· day, and is sufficient to enable treatment of the filler 2m ^2, it turns out the conclusion that the wastewater treatment efficiency is more than 95% of the total efficiency.

As described above, the living sewage and wastewater treatment apparatus according to the embodiment of the present invention is applied to the treatment of living sewage and wastewater by immersion rotation contact anaerobic anaerobic reaction method and aerobic scent flow aeration contact filtration reaction treatment method. Besides being efficient,

First, it is easy to deal with the inflow of high load organic load,

Second, the microorganisms are diverse and diverse, so the retention time is independent of the hydraulic retention time.

Third, microorganisms adhere to contact materials at high concentrations, and the specific surface area is large, so the microbial retention time is long, so the amount of solid waste (surplus sludge) is low due to the food chain principle and refining principle, resulting in less management or labor costs for disposal of the final surplus sludge. Takes

Fourth, it has a large ability to cope with load fluctuations caused by instant toxic inflow

Fifth, even in the case of a hardly decomposable substance, the decomposition is performed well, and there is a great effect on denitrification and dephosphorization. In addition, the treatment cost and the required area can be minimized, and there is also an effect of almost no noise.

Since what has been described above is merely a mere example in all respects, the present invention should not be limitedly interpreted based on this. Therefore, modifications and equivalent embodiments that fall within the true spirit and scope of the present invention shall fall within the claims of the present invention.

Claims (2)

In the wastewater treatment system comprising a wastewater storage tank (10), a filtration tank (20), an anaerobic tank (30), a denitrification tank (40), and a settling tank (70) and a discharge tank (80), The partition wall 232 is installed inside the tank 230 to form the contact material layer 242 and the media layer 244 at a constant height from the bottom, and the living sewage and the lower part of the partition wall 232 adjacent to the bottom portion. The living sewage and wastewater treatment apparatus, characterized in that the upstream aeration filter biofilm tank 200 is formed between the denitrification tank 40 and the settling tank 70 so that the waste water flows in. The living sewage and wastewater according to claim 1, wherein the upstream aeration filter biofilm tank 200 is installed separately from the aerobic microbial membrane contact filtration reaction tank 210 and the aerobic contact filtration biofilm nitriding reaction tank 220. Processing unit.