KR100479957B1 - Sewage treatment system - Google Patents

Abstract

The present invention is to construct a waste water treatment apparatus for removing nitrogen and phosphorus as well as organic matter, while providing a simple structure and a small installation space compared to the conventional waste water treatment apparatus, treatment efficiency is maximized, as well as management The present invention relates to a wastewater treatment system that is eco-friendly by using wood chips and oyster shells, and is economical because it is easy and low in post management costs.

Accordingly, the present invention provides a flow control tank for allowing solids to settle in the sewage flowing through the sewage inlet pipe, and causing the suspended solids and oil components to float; A microbial culture tank configured to communicate with the flow regulating tank, the agitation and homogenization of sewage, and flocculation of the suspended suspended matter and oil components to precipitate in the flow regulating tank; A denitrification / artificial unit configured to communicate with the microbial culture tank, and to fill a circular oyster shell at the bottom and a crushed oyster shell at the top in a stacked state to remove organic matter, nitrogen, and phosphorus in the sewage; A pump well for collecting sewage having undergone the denitrification and artificial treatment, and having a pump installed in the water; Different sizes of wood are filled in a stacked state, and pipes are connected to allow the sewage pumped by the submersible pump to be sprinkled on the wood. An air inlet pipe is provided at the bottom to continuously supply oxygen to activate microbial activity. Microbial reactor; And a filtration and discharge tank for discharging the treated carbon through the microbial reaction tank once again by incorporating an activated carbon layer therein.

Description

Sewage treatment system

The present invention relates to a wastewater treatment apparatus, and more particularly, to a wastewater treatment apparatus for decomposing not only organic matter in wastewater but also nitrogen and phosphorus using microorganisms and oyster shells.

The recent rapid urban concentration and industrial development of the population increase the quantity of urban sewage and industrial wastewater and increase the quality of pollution, which is a big problem of modern society, and economic and effective treatment of it is the human race to pursue economic development and pleasant life. It will be a challenge.

However, existing wastewater treatment facilities focus only on the removal of organic matter and meet the statutory standards, but have little use for the removal of nitrogen and phosphorus. These facts have been overlooked, resulting in severe eutrophication (red tide) even in lakes, rivers, and even nearby waters, resulting in the destruction of ecosystems and the vicious cycle of severe financial strikes.

The government began to regulate total nitrogen and total phosphorus only in sewage treatment plants in January 1996, but it is difficult to achieve effectiveness because general small-scale sewage treatment facilities do not have special alternatives to treatment methods.

On the other hand, the technique of using wood chips in the method of removing organic matter was sawdust filtration prize developed by the Rural Development Administration's livestock test center in 1992, but it is not practical because of the trouble of frequently changing sawdust and soil.

In addition, recently, a wastewater treatment apparatus has been devised using sawdust as a medium to make sawdust a carrier for microorganisms, but as the use period has elapsed, the water-soluble extracts contained in sawdust or wood chips gradually flow out and the extract is filtered. There is a problem that clogging occurs due to the density of the liver or the treatment efficiency is extremely reduced.

Particularly, one of the shortcomings of the spraying method was the disgusting odor caused by the breeding of flying flies and pests, and the odor caused by the sprinkling of wastewater, and the dark red pigment was leaked from the cotton and sawdust for a long time. In the winter, the upper part of the wooden plywood layer is solidifying, and the use is avoided due to various problems.

In addition, most of the techniques known to date for nitrogen and phosphorus removal have been widely expanded to be treated with anaerobic tanks, anaerobic tanks, and aerobic tanks, which required excessive installation area and cost. In addition, management is not easy, and it is not getting much response.

In order to remove nitrogen and phosphorus by using oyster shells, oyster shells are used as fixed bed media in the aeration tank of the existing facility, but the supply of substrate and air is caused by excessive increase of microorganisms with increasing load. Due to this inability, the treatment efficiency rapidly decreases over time due to the anaerobic state between the carrier layers and is hardly applied.

Accordingly, the present invention has been made to solve the above problems, and the object thereof is to construct a wastewater treatment system for removing nitrogen and phosphorus as well as organic matters. In addition to providing an installation space, the treatment efficiency is maximized, as well as easy to manage and less follow-up management, economical, and by using wood chips and oyster shells to provide a nature-friendly waste water treatment device.

The present invention for achieving the above object is a flow rate adjustment tank to precipitate the solids in the sewage flowing through the sewage inlet pipe, floating material and oil components;

A microbial culture tank configured to communicate with the flow regulating tank, the agitation and homogenization of sewage, and flocculation of the suspended suspended matter and oil components to precipitate in the flow regulating tank;

A denitrification / artificial unit configured to communicate with the microbial culture tank, and to fill a circular oyster shell () at the bottom and a crushed oyster shell at the top in a stacked state to remove organic matter, nitrogen, and phosphorus in sewage;

A pump well for collecting sewage having undergone the denitrification and artificial treatment, and having a pump installed in the water;

Different sizes of wood are filled in a stacked state, and pipes are connected to allow the sewage pumped by the submersible pump to be sprinkled on the wood. An air inlet pipe is provided at the bottom to continuously supply oxygen to activate microbial activity. Microbial reactor; And

The interior of the activated carbon layer therein is a filtration and discharge tank to discharge the highly treated treatment water through the microbial reaction tank once again;

DETAILED DESCRIPTION Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a cross-sectional view showing the configuration of a wastewater treatment apparatus according to the present invention, Figure 2 is a perspective view showing the configuration of the wastewater treatment apparatus according to the present invention, Figure 3 is an extract of the microbial reaction tank in the present invention It is a side cross-sectional view shown.

The waste water treatment apparatus of the present invention is divided into a primary, a secondary, and a tertiary. The first is divided into the flow rate adjustment tank 10, the microorganism culture tank 20, denitrification and artificial tank 30, the pump well 40 in Figure 1, the second is the microbial reaction tank 50, the third is the filtration and Discharge tank 60.

As shown in FIG. 1, the flow rate adjustment tank 10, the microorganism culture tank 20, the denitrification / artificial tank 30, and the pump well 40 are connected to the partition walls 2, 3, and 4 by the concrete structure 1. It was configured to partition the predetermined space, the unmanned automatic panel 70 which is a control means of the microorganism reaction tank 50 and the device on the upper portion of the concrete structure, the filtration and discharge tank 60 was configured in the ground again.

The detailed description of each group is as follows.

In FIG. 1, the underground structure is divided into two groups, and the role of the structure is subdivided by dividing the partitions (2) (3) (4) at two-thirds of each group into four groups.

First, as shown in Figure 1, the flow adjustment tank 10 precipitates solids in the sewage introduced through the 'T' shaped sewage inflow pipe 11 and serves to float the suspended solids and oil components. In addition, a bulkhead (2) is constructed at two-thirds of a tank, and the upper part of the bulkhead has a depth of about 10 cm to facilitate the transfer of supernatant water.

Second, in the microbial culture tank 20 serves to agitate and homogenize sewage with a small air pump 21 for 24 hours, and at the same time to flocculate the suspended solids and oil components in the flow control tank 10 with each other It serves to settle in the flow rate adjustment tank (10). Thus, only the supernatant except the floating material is introduced into the microbial culture tank 20 through the upper part of the partition wall.

In addition, the microbial culture tank 20 has two containers, such as a small plastic bucket with a lid closed, and drills several small holes such as briquettes at the top and the bottom to facilitate the communication of sewage, and then fix them to the ceiling with several strings. One is a microbial container (22) into which a solid microbial agent is introduced, and the other is an oyster shell manufacturing container (23) containing a oyster shell processed into a powder and then fired into a solid state. Melt slowly and continuously.

The microbial agent exhibits a strain activity to help the microorganisms decompose the organic material to enhance the coagulation sedimentation to help the coagulation of organic substances and oil components in the flow control tank 10, to maintain a high concentration of microbial activity in the microorganism reaction tank 50 to be described later Microbial activation in a short time increases processing efficiency from the beginning of commissioning.

In addition, oyster shell powder preparations are collected by washing waste oyster shells, soaked in fresh water for more than 1 week to remove salt, and then dried naturally and pulverized to 0.85mm or less in particle size, and then fired in an electric furnace at 850 ℃ for 4 hours and then soaped by hydraulic press As a solidification, this oyster shell powder formulation also slowly dissolves in sewage with microbial formulations, decomposing organic matter and removing nitrogen and phosphorus.

Third, in denitrification and artificial (30), the washed oyster shells are filled to a height of about 1 m after desalination and natural drying. The lower half of the oyster shell is filled with a circular oyster shell (31), and the upper half of the oyster shell is 3 to 5 cm. The broken crushed shell shell 32 is filled.

Since the bottom of the culture tank 20 and the denitrification / artificial 30 penetrates and is connected, air generated from the small air pump 21 located at the bottom thereof extends to the entire culture tank and denitrification / artificial 30. In the lower denitrification and artificial 30, a small air pump 21 is operated to give up for 24 hours to maintain an aerobic state.

Lung oyster shell has an irregular surface area, high specific surface area, high contact rate with microorganisms, and high affinity between microorganisms and oyster shells, making it easy to form biofilms. Will be removed.

In this process, the sludge removed due to sediment or aeration at the bottom of the microorganism culture tank 20 and the denitrification / artificial tank 30 is a return pump 33 installed with a hopper for 10 minutes per hour. If the biofilm formation accumulates over a long period of time in the oyster shell, and the high-pressure hose from the denitrification and artificial vessel 30 is continuously operated while the conveying pump 33 is continuously operated, the biofilm is sprayed downward. When the desorbed and desorbed biofilm is settled in the lower part of the denitrification / synthesis 30, it is conveyed to the flow rate adjusting tank 10 as the transfer pump 33 to maintain high processing efficiency.

In addition, the denitrification and artificial vessel 30 serves to block oyster shells from passing the sludge to the pump well 40 to be described later, and prevents clogging in the microbial reactor 20.

By installing the overflow plate 34 in the upper part of the partition wall between the denitrification and the artificial 30 and the pump well 40, the sewage flow is quieted and the biofilm of the oyster shell is not detached so that only the supernatant water is transferred to the pump well 40. do.

In the fourth pump well (40) using a spray pump (41) is to constantly spray the sewage to the microorganism reaction tank 50 to be described later to spray spray.

The sprinkling pump 41 is connected to the bellows hose 42 to facilitate first aid in case of a breakdown, and a check valve is installed on the upper part of the bellows hose to prevent the sewage from being transferred to the preliminary pump, as well as when the pump is stopped. The sewage from the pipe 43 is gradually drained into the flow rate adjustment tank 10 so as not to freeze in winter.

In addition, the flow rate adjusting sensor 44 is installed at regular height intervals so that the water level of the pump well 40 is always maintained at an intermediate level. That is, the sensor of the pump well 40 is divided into upper, middle, lower, and upper sensors so that the idle time is 10 minutes, the middle is 20 minutes, and the lower part is 30 minutes for smooth flow adjustment.

Fifth, the microbial reactor 50 is constructed of concrete in the case of underground buried (not shown), and made of FRP in the case of the ground type, divided into diameters of φ1,100, φ1,500, φ2,000, and the height of 2,500. It is manufactured in mm, 3,000mm, etc., and the thickness is 3 ~ 4PLY (1PLY = 0.7mm) or more and the inside of the insulation type polyurethane panel is attached and then 1 ~ 2PLY coating by FRP to prevent moisture from getting inside the insulation. do. The bottom of the bottom facilitates the outflow of the treated water, while the bottom of the upper lid is provided with a back washing pipe 51 so that the backwash water outflow and especially the smell of the sewage water sprayed through the sewage pipe when air is injected into the air pump It is sent to the flow rate adjustment tank 10 through the outflow pipe 52.

In addition, the opening and closing observation port 53 is installed in the upper part of the microbial reaction tank 50 to facilitate the filling operation and observation of the inside of the neck, and the heating wire 54 is installed on the side and the upper part and the thermostat 55 is installed on the outside. To prevent freezing in winter.

In addition, the steel ladder 56 was placed outside the microbial reaction tank 50 to facilitate the internal observation through the opening and closing observation port 53.

The microbial reaction tank 50 is filled with wood chips, which is a kind of microbial carrier to keep the activity of microorganisms active and maintain the proper temperature therein. Select the species, process it to a certain size (3 ~ 5mm, 5 ~ 7mm), remove the fine powder, and put it in the vacuum impact drying furnace to use the wood chips from which the sap components and pigments are removed.

This wood piece is filled with 5-7 mm wood piece 57 in the lower part of the microbial reaction tank 50, and a circular air injection pipe 58 is installed thereon, and 3-5 mm wood piece 59 is placed thereon. 60% of the filling and then about 20% of the 5-7mm neck piece 57 is laminated.

And a semicircular mesh is installed inside the outflow pipe of the lower part and in the outflow pipe of the upper part to prevent the outflow of wood. In particular, the air inlet pipe 58 installed in the lower part of the neck piece layer injects air for 24 hours to supply oxygen to the microorganisms that reproduce in the neck piece, which makes the activity vigorous and transfers the heat generated during fermentation of microorganisms to the upper part in winter. The upper part does not freeze, thereby transferring air from the lower part to the upper part, thereby preventing clogging of the neck piece.

If the drainage is not smooth, the blockage is fundamentally solved by adjusting the valves (A), (B) and (C) to backwash. That is, when the spraying pump is operated after the valve A and the valve C are opened and the valve B is opened, the backwashing occurs naturally, and when the valves A, B, and C are operated in the reverse order, the spraying operation is normally performed.

Sixth, the treated water passing through the microbial reaction tank 50 passes through the activated carbon layer 61 in the middle of the filtration and discharge tank 60 from the bottom to the top to be slightly mixed in the microbial reactor 50 during the initial operation of the apparatus. The fine powder and the pigment are highly treated in the activated carbon layer 61.

In addition, the activated carbon layer 61 can be used for a long time if it is backwashed with clean water such as denitrification and artificial 30. In addition, when there is little or no inflow of sewage during the initial trial run, if the inner end of the discharge pipe 62 of the filtration and discharge tank 60 is set up like an elbow, the treated water may flow through the treated water conveying pipe 64. 10) continuous operation is possible because it is configured to be returned.

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and changes are possible in the art without departing from the technical spirit of the present invention. It will be clear to those of ordinary knowledge.

The present invention for purifying wastewater by using wood chips and oyster shells is excellent in the removal of organic matter, nitrogen and phosphorus, as well as in the form of being buried underground in a concrete structure to achieve the maximum effect on a minimum scale, flies or pests in summer It does not occur, and there is no odor, so it is possible to maintain a clean environment at all times, and it is expected to contribute greatly to many water policies of the country at low cost.

1 is a cross-sectional view showing the configuration of a waste water treatment apparatus according to the present invention.

Figure 2 is a perspective view showing the configuration of the waste water treatment apparatus according to the present invention.

Figure 3 is a side sectional view showing an extract of the microbial reaction tank in the present invention.

*** Explanation of symbols for main parts of drawing ***

10: flow adjustment tank, 11: sewage inlet pipe,

20: microbial culture tank, 21: air pump,

22: microbial container, 23: oyster shell container,

30: denitrification, artificial, 31: circular cave shell,

32: crushed shell shell, 33: conveying pump,

34: moon plate, 40: pump well,

41: water pump, 42: bellows,

43: sewage water pipe, 44: flow rate adjustment sensor,

50: microbial reactor, 51: backwashing tube,

52: backwash water outlet, 53: retractable viewing port,

54: hot wire, 55: thermostat,

57, 59: wooden piece, 58: air injection pipe,

60: filtration and discharge tank, 61: activated carbon layer,

62: discharge pipe, 64: treated water return pipe,

Claims (8)

A flow adjusting tank for allowing solids to precipitate in the sewage flowing through the sewage inlet pipe, and causing floating substances and oil components to float; A microbial culture tank configured to communicate with the flow regulating tank, the agitation and homogenization of sewage, and flocculation of the suspended suspended matter and oil components to precipitate in the flow regulating tank; A denitrification / artificial unit configured to communicate with the microbial culture tank, and to fill a circular oyster shell at the bottom and a crushed oyster shell at the top in a stacked state to remove organic matter, nitrogen, and phosphorus in the sewage; A pump well for collecting sewage having undergone the denitrification and artificial treatment, and having a pump installed in the water; Different sizes of wood are filled in a stacked state, and pipes are connected to allow the sewage pumped by the submersible pump to be sprinkled on the wood. An air inlet pipe is provided at the bottom to continuously supply oxygen to activate microbial activity. Microbial reactor; And Activated carbon layer is built inside the filtration and discharge tank to discharge the highly treated treatment water through the microbial reaction tank once again discharged; waste water treatment apparatus comprising a. The wastewater treatment apparatus according to claim 1, wherein the flow rate adjustment tank, the microorganism culture tank, the denitrification / artificial tank, and the pump well are concrete structures partitioned by a plurality of partition walls and are buried underground. The method according to claim 1, wherein the microorganism culture tank to help the organic matter and oil components of the sewage, and to keep nitrogen and phosphorus to continuously dissolve solid microbial agent and oyster shell powder formulation to remove nitrogen and phosphorus Wastewater treatment system The method according to claim 1, characterized in that it further comprises a overflow plate higher than the water depth of the pump well in order to quiet the flow of sewage on the partition wall between the denitrification, artificial and the pump well, and to prevent the biofilm of the oyster shell not detached. Wastewater treatment device The wastewater treatment apparatus according to claim 1, wherein the pump well further comprises a flow rate adjusting sensor for controlling pumping so that the low water level, the medium water level, and the full water level are always in the medium water level. The method of claim 1, the wood pieces filled in the microbial reaction tank is selected from a species of cedar, such as cedar absorbent and relatively low content of water-soluble extract and processed to a certain size (3-5mm, 5-7mm) to remove the fine powder and then the sap components and Waste water treatment apparatus, characterized in that applied in the state of removing the pigment. The waste water treatment apparatus according to claim 1, further comprising a heating wire and a thermostat to prevent freezing of winter on the side and top of the microbial reactor. The waste water treatment apparatus according to claim 1 or 7, further comprising an opening / closing observation port on the top of the microbial reactor for neck filling operation and internal observation.