KR20000019492A - Method for managing high concentrated wastewater - Google Patents

Abstract

PURPOSE: A method for treating high concentrated waste water uses a lot of microorganism groups to remove organic substances. CONSTITUTION: The method is composed of precipitation tank(1), storage tank for raw water(2), activation tank(3), condensation tank(4), the first anaerobic tank(5), aeration tank(6), the second anaerobic tank(7), separation membrane aeration tank(8), filtering tank(9), disinfection tank(10), discharge tank(11), and storage tank(12) for storing sludge. The first anaerobic tank(5) and the second anaerobic tank(7) are in continuous series structure to maximize efficiency of treatment. Activated sludge is separated into liquid and solidity by separation membrane aeration tank(8) and condensation device(60) in filtration tank(9). So, settling tank is not necessary to this method, and high concentrated sewage disposal is possible.

Description

High concentration organic sewage and wastewater treatment system

The present invention relates to a high concentration organic organic wastewater treatment apparatus, including an anoxic tank and an aeration tank, which are serially configured in series, and an electrolytic flocculator and, in particular, a high-load organic substance and nitrogen, phosphorus, etc. in wastewater. It is a high concentration organic sewage and wastewater treatment system that can greatly improve treatment efficiency and reduce required site and maintenance cost.

Generally, biological treatment is known to be effective as a conventional organic sewage and wastewater treatment, and in particular, the activated sludge method is widely used as the most common method.

However, in this active sludge process, solid-liquid separation of treated water and microbial sludge is caused by gravity sedimentation in the sedimentation tank, so sludge swelling and overflow in the sedimentation tank are inadvertently caused by impact load phenomena due to waste water volume, inflow load fluctuations, and inflow of toxic substances. Not only impairs the quality of the treated water, but also necessitates skilled management skills, but also maintains unstable treatment all the time, especially nitrogen and phosphorus, which are the main culprit of eutrophication such as lakes, rivers and the sea. Advanced treatment of nutrients is rarely expected.

The present invention was devised to solve the drawbacks and problems of the prior art as described above. In order to simultaneously process the organic matter in the wastewater as well as the nutrients of nitrogen and phosphorus at the same time, the anoxic tank and the aeration tank are constituted in a double continuous process to perform spatial treatment. In order to improve efficiency, it is complemented in series, and residual nutrients and hardly degradable contaminants can be solved by electrolytic agglomerator. Especially, it uses sludge and electricity in the rear aeration tank by using hydrophilic microfiltration membrane for solid-liquid separation. It is to provide a high-performance treatment of high concentration organic sewage and wastewater, as well as excellent economic efficiency and simple management, which can be achieved by completely solid-liquid separation of decomposed flocculation by-products.

In order to remove organic substances and nitrogen compounds in the wastewater, the anoxic acid tank and aeration tank facilities, which are usually composed of one stage, are composed of two consecutive series to improve treatment efficiency and complement the space limitation of the primary facilities. In order to increase the concentration of microorganisms, which are the core of pollutant treatment, to a high concentration of 10,000PPM to 15,000PPM, which is about 3 to 5 times higher than the conventional activated sludge process, hydrophilic microfiltration membranes are immersed in the rear aeration tank.

In general, since the role of the sedimentation tank of the activated sludge wastewater treatment plant is solid-liquid separation, the sedimentation tank is unnecessary because the membrane separation technique is applied.

In general, the microfiltration membrane is pressurized by installing a membrane element in the pressure vessel, but when the membrane is filtered with a large amount of SS such as microorganisms such as activated sludge in the aeration tank in the pressurized vessel, Blockage at the membrane surface proceeds rapidly and filtration cannot be performed stably for a long time.

For this reason, although membrane separation is impossible in the solid-liquid separation of raw water having a high solute component, such as filtration of activated sludge or river water, it is possible to form a fine filtration membrane according to the present invention in a rear aeration tank, and thus, As it can remove more than 99.7%, it is possible not only to obtain highly transparent treatment water, but also to maximize the processing capacity of the downstream linkage treatment facility, and dramatically increase the high treatment efficiency due to the high concentration of microorganisms in the activated sludge tank. Multiple effects can be obtained, such as raising.

In addition, the present invention consists of an anoxic tank and an aeration tank in a series of primary and secondary to prevent treatment efficiency degradation due to limited spatial and temporal limitations, and to maintain various concentrations of microorganisms such as denitrifying bacteria and nitrifying bacteria in each tank, and thus, compared to existing facilities. It has the advantage of improving the treatment efficiency per unit time even at less than 50% of sites, and ensuring stable treatment at all times regardless of the change in pollution load rate. As a chemical treatment, it is subjected to a post-treatment with an electrolytic coagulant that can simultaneously perform chemical oxidation and coagulation reactions. Expect continuous and complete advanced treatment of various pollutants in wastewater Not only can this be a breakthrough device that is economically advantageous and very easy to manage.

1 to 5 are views of the device of the present invention,

1 is a plan view of a high concentration organic wastewater wastewater treatment apparatus according to the present invention.

Figure 2a, 2b is a longitudinal sectional view of a high concentration organic sewage wastewater treatment apparatus according to the present invention.

3 is a plan view of the microfiltration membrane unit.

4 is a front view of the microfiltration membrane unit.

5 is a partial side view and a longitudinal sectional view of a microfiltration separator unit;

<Explanation of symbols for main parts of drawing>

5: first anaerobic tank 6: aeration tank

7: second anoxic tank 8: membrane aeration tank

9: Separation membrane filtration tank 12: Sludge storage tank

20: fine screen 40, 70: microfiltration membrane unit

44: microfiltration hollow fiber membrane 48: membrane cleaning diffuser

50,80: suction filtration pump 60: electrolytic flocculator

90: blower 92: diffuser

110: membrane backwash tank 130: underwater stirring device

140: circulation pump 150: feed water pump

Hereinafter, the embodiment will be described in detail with reference to the accompanying drawings of the present invention 1 to 5 as follows.

1 is a plan view of a high concentration organic sewage wastewater treatment apparatus according to the present invention, Figure 2a, 2b is a longitudinal sectional view of a high concentration organic sewage wastewater treatment apparatus according to the present invention, Figure 3 is a microfiltration membrane unit 4 is a front view of the microfiltration membrane unit, and FIG. 5 is a partial side view and a longitudinal cross-sectional view of the microfiltration membrane unit, respectively. Referring to FIGS. 1 and 2, the inlet sedimentation tank 1 and the raw water storage tank are shown in FIG. (2), reaction tank (3), aggregation tank (4), first anoxic tank (5), aeration tank (6), second anoxic tank (7), membrane aeration tank (8), membrane filtration tank (9), disinfection tank (10) It is composed of a discharge tank 11 and a sludge storage tank 12 for storing the generated sludge, the high concentration organic wastewater wastewater treatment apparatus according to the present invention is made in order to maximize the treatment efficiency in a conventional wastewater treatment apparatus. Acupuncture with dual continuous series configuration of one anoxic tank (5) and a second anoxic tank (7) A hydrophilic microfiltration membrane unit (40, 70) is used for solid-liquid separation of the activated sludge solids in the membrane aeration tank (8) as a substitute for the separation tank and for the solid-liquid separation of the flocculated suspension material formed through the electrolytic agglomerator (60) in the membrane filtration tank (9). It is an important feature.

First, the sequential treatment configuration and operation of the high concentration organic sewage and wastewater treatment apparatus according to the present invention protects the treatment facilities while passing the crude water screen 120 in the inlet sedimentation tank 1. In order to remove the sand, contaminants, etc. in the raw water, and stored in the raw water storage tank (2) to automatically react according to the water level of the membrane aeration tank (8) through the raw water transfer pump 150 and the reaction tank (3) and coagulation tank (4) Pass through the fine screen 20 to separate and remove the suspended solids of the incoming raw water as possible.

After such a series of pretreatments, organic contaminants and water-soluble contaminants such as nitrogen and phosphorus compounds remain in the raw water. Among these contaminants, in particular, to remove organic substances and nitrogen compounds, anoxic conditions under which denitrification reactions and nitrification reactions occur. In order to further improve the processing efficiency, these two conditions are configured in a double continuous series, that is, in order of the first anoxic tank (5), the aeration tank (6), the second anoxic tank (7), and the membrane aeration tank (8). Installed in a sequential array.

In each of the tanks 5, 6, 7, and 8, decomposition of organic substances occurs in common. In particular, in the aeration tank 6 and the membrane aeration tank 8, nitrification of nitrogen compounds mainly composed of ammonia nitrogen compounds by nitrate bacteria is carried out. Air is supplied to oxidize in a state, which is composed of a blower 90 for supplying air and air dispersing means 91, 92, and 93.

In addition, the internal circulation submersible pump 140 is installed in the membrane aeration tank 8 so that the nitrified mixture is internally circulated and returned to the first and second anaerobic tanks 5 and 7 through the branch pipe 141. In the anoxic tank (5,7), the nitrogen compounds in nitrification state are reduced to nitrogen gas (N₂) by using organic substances and denitrification bacteria in the inflowing raw water, and are discharged to the atmosphere. In order to achieve a complete reaction, an internal complete mixing environment is required under anoxic conditions, so that the underwater agitating device 130 is installed in a direction that is opposed to each other.

The microorganisms in charge of the contaminant purification by their respective functions in each tank are capable of retaining a high concentration of microorganisms of 10,000 PPM or more as the solid-liquid separation proceeds by the microfiltration membrane 44 in the membrane aeration tank 8. This is the key to obtaining high treatment efficiency even in the second stage of biological treatment.

The separation membrane 44 is a hydrophilic microfiltration hollow fiber membrane of suction filtration method is installed to solid-liquid separation of the activated sludge and the treated water in the state of being immersed in the membrane aeration tank (8), the suction filtration pump for transporting the treated water ( It is connected to 50).

Immersion type suction and total filtration hydrophilic microfiltration membrane units (40, 70), which do not require a pressure vessel, are manufactured in a separate unit (UNIT), which is convenient for installation and management as shown in FIGS. 3, 4 and 5 (8). 9), and during the filtration process, air is supplied through a separate distribution pipe 91 under the membrane unit (UNIT) (40, 70) to prevent membrane deposits, adhesion of membranes, clogging of membranes, clogging of membranes, etc. Long term stable operation is possible.

3, 4, and 5 show an embodiment of the microfiltration membrane units 40 and 70, and the entire frame of the microfiltration membrane units 40 and 70 is semi-permanent in the sewage and wastewater and the appearance of the membrane. It is composed of STS angle 41 for the protection of the enemy, and the round rods 46 and 46a are provided in two stages so as to support the membrane collecting rod 44a which serves as a collecting water for each microfiltration membrane 44 during suction filtration. Weld to the main frame in the transverse direction, and install the round bar in the longitudinal direction at intervals equal to the center of the collecting rod 44a, and fix it firmly with a cable tie 46c.

In order to simplify the connecting pipe between each collecting pipe of the treated water sucked and filtered from each separator collecting rod 44a and the separator filtering pump 50, two collecting pipes 43 are provided on the upper side of the main frame with BOLT & NUT. By fixing and installing the same type of collecting pipe 43a in the lower part, the plurality of separators 44 in the separator precision filtration units 40 and 70 can be connected to the whole.

The collecting pipes 43 are composed of a square STS PIPE for convenient installation of the socket 45a for connection with the separator collecting rod 44a, and the assembly and disassembly of the present collecting pipe 43a and the separator collecting rod 44a. The ONE TOUCH NIPPLE (42b) and the ONE TOUCH ELBOW (42) are respectively connected to the SOCKET (45a) and the membrane collecting rod (44a) connecting portion so as to be more easily manipulated, and then connected to the urethane tube (42a).

The two collecting pipes 43 on the upper part of the microfiltration membrane unit 40 and 70 each have a socket 45 connected to the suction filtration pump 50, and the microfiltration membrane unit 40, 70) I-BOLT (49) is installed at each upper corner of the microfiltration membrane unit (40, 70) for convenient maintenance and repair.

Meanwhile, referring to FIGS. 4 and 5, in order to prevent clogging such as deposition of the membrane surface of the microfiltration membrane 44 and blockage between the membranes, a separate membrane cleaning diffuser 48 is disposed under the microfiltration membrane unit 40 or 70. Place the microfiltration membrane 44 at right angles to the installation direction, install the STS plate 47 on both sides of the microfiltration membrane unit 40 to prevent air bubbles from scattering during air cleaning, and the microfiltration membrane unit 40, 70 It is configured to be connected to the air distribution pipe 91 from the blower 90 by installing a socket for supplying air (48a) at the bottom.

The microfiltration membrane unit (40, 70) can be configured in two or three stages to reduce the site of the installation space, in this case, only the microfiltration membrane unit (40, 70) at the bottom of the membrane filter 48) may be provided, and at this time, the cleaning function of the microfiltration membrane 44 may be effectively performed by the above-described separation membrane for preventing air bubble dispersion 47.

In addition, the suction filtration pump 50 is operated at a differential pressure of about 0.2 to 0.4 kg.f / cm 2 in order to protect the microfiltration membrane 44, and when a difference between the initial operation differential pressure and 0.3 kg.f / cm 2 or more usually occurs In order to perform the backwash in order to protect the separator 44, the backwash tank 110 is connected to perform a perfect automatic operation.

In addition, when backwashing is performed, the filtration and backwashing functions are automatically performed by using the membrane filtration pump 50 without a separate backwashing pump only by reverse adjustment of four automatic valves installed in the suction and discharge pipes. .

This function and action is the same for the fine filtration membrane unit 70 and the suction filtration pump 80 for agglomeration suspension solid-liquid separation installed in the rear end of the electrolytic agglomerator 60.

In case of high concentration organic sewage and wastewater, biodegradable hardly decomposable substances and phosphorus compounds may remain in the treated water passing through the microfiltration membrane unit 40. The electrolytic agglomerator 60 is configured at the rear end, and each uses an electrode plate capable of depositing aggregated ions such as aluminum so that an electric forced oxidative decomposition of the hardly decomposable substance and a coagulation reaction of residual phosphorus can occur. .

Microfiltration for coagulation suspension solid-liquid separation in order to obtain the final treated water from the coagulation suspension produced. Reconstitution of the membrane unit 70 to sterilize bacteria present in the treated water in the disinfection tank 10. After disinfection of the disinfection facility 100, and finally discharged through the discharge tank 11, raw water Depending on the pollution concentration of the treated water or the final treated water passed through the microfiltration membrane 40 of the shear is very excellent in the quality of the water can be reused in heavy water, such as toilet water or other cleaning water, on the other hand, membrane aeration tank (8) More than necessary microorganisms, that is, excess sludge is stored in the sludge storage tank 12 through the branch pipe 142 using the internal circulation pump 140.

This series of processes has a unique treatment function for each individual facility in the high concentration organic wastewater treatment system, and depending on the nature of the raw water and the target water quality, the purpose of the treatment may be the partial or partial application of each facility. It is possible to achieve.

As described above, the present invention is a device for completely high-level treatment of organic matter in high concentration organic sewage and wastewater as well as nutrients such as nitrogen and phosphorus, which are the main causes of eutrophication in aquatic systems, in particular, hydrophilicity as a substitute for conventional sedimentation tanks. Submerged suction filtration membranes (40, 70) can be used to retain high concentrations of microorganisms, and in addition, the aerobic and aerobic environmental conditions can be configured in series to further improve spatial and functional efficiency. An advanced technology intensive device that constitutes an electrolytic agglomerator (60) for further treatment of remaining hardly decomposable substances and phosphorus compounds, and enables highly advanced treatment of high concentration organic sewage and wastewater, which was not expected in the conventional activated sludge process. to be.

In particular, it is expected to lead as a new technology for sewage and wastewater treatment, as it considers not only excellent treatment efficiency, but also required site, maintenance cost reduction, and convenience of management, and it is expected to break away from the stereotype of existing treatment technology. Therefore, the high level organic sewage and wastewater treatment apparatus of the present invention has a unique treatment function for each individual facility, and therefore, it is necessary to partially or partially apply each facility combined according to given environmental conditions. It should be appreciated that various embodiments which may be modified and changed within the scope of the claimed rights of the present invention may be violated within the protection scope of the present invention, since the performance of the object can be performed.

Claims (5)

The front end of the fine screen 20 for removing suspended solids and the first anaerobic tank (5), aeration tank (6), The second anoxic tank (7) and the separation membrane aeration tank (8) are double continuous configuration under anoxic conditions and aerobic conditions, and the electrolytic flocculator (60) is installed at the rear end, and the hydrophilic microfiltration separation membrane for solid-liquid separation is used instead of the precipitation tank. A high concentration organic sewage and wastewater treatment system configured by connecting the unit (40, 70) to the membrane aeration tank (8) and the membrane filtration tank (9) after being immersed and connected to a suction filtration pump (50, 80). According to claim 1, the microfiltration membrane unit (40, 70) is composed of the entire frame of the STS angle (41), the two square pipes of the upper and lower fixed to the frame by bolts, constitute a plurality of collecting pipes (43) High-density organic sewage and wastewater treatment apparatus, characterized in that the separation membrane 44 is installed in one unit so as to be able to filter a large amount. According to claim 1, the microfiltration membrane unit (40, 70) is connected to the connection of the water collecting pipe 43 and the membrane collecting rod (44a) so that the assembly and disassembly of the plurality of separation membrane 44 can be performed more easily The high concentration organic sewage and wastewater treatment system, characterized in that the ONE TOUCH NIPPLE (42b) and the ONE TOUCH ELBOW (42) is installed by combining with a urethane tube (42a), respectively. According to claim 1, the microfiltration membrane unit (40, 70) has a plurality of membrane cleaning diffusers 48 disposed at a right angle to the installation direction of the microfiltration membrane 44 to increase the cleaning efficiency of the membrane 44 The high concentration organic wastewater treatment system, characterized in that to prevent the blockage of the), the lower side is connected to the air supply distribution pipe 91 from the blower (90) by installing the air supply SOCKET (48a). According to claim 1, the microfiltration membrane unit (40, 70) in order to efficiently perform the air cleaning function of the membrane, the air bubbles dispersion prevention plate 47 is formed by STS plate on both sides of the microfiltration membrane unit (40, 70) High concentration organic sewage and wastewater treatment apparatus, characterized in that the configuration.