KR20130012681A - Biological filtration system for water treatment - Google Patents

Abstract

PURPOSE: A biofilm filtration apparatus for water treatment is provided to perform a smooth purification, and to enhance the treatment efficiency by simultaneously removing total phosphorous, suspended materials, dissolved organic materials, and etc. which are included in the inflow water. CONSTITUTION: A biofilm filtration apparatus for water treatment comprises an inflow water reservoir(10), a line mixer(20), a flocculation basin(30), a biofilm filtration basin(40), a treated water reservoir(50), and a back washing facility(60). The line mixer mixes the inflow water and coagulant instantly, and creates micro flocs by the coherence with foreign substances included in the inflow water. The flocculation basin coheres foreign substances not cohered and micro flocs which are included in the inflow water from the line mixer, and produce coarse flocs. The biofilm filtration basin has multiple filter layers in order to filter the coarse flocs contained in the inflow water from the flocculation basin, and to adsorb the dissolved organic materials. The back washing facility is installed between the biofilm filtration basin and the treated water reservoir in order to back-wash the filter layers of the biofilm filtration basin by sending the air and treated water in the treated water reservoir to the biofilm filtration basin according to the water level of the biofilm filtration basin.

Description

Biological filtration system for water treatment

The present invention relates to a filtration apparatus for purifying effluent (influent water) of river water or sewage and wastewater treatment plant, and more specifically, the total phosphorus contained in the effluent while chemical treatment by flocculant and biological treatment by microorganisms is performed at the same time. The present invention relates to a biofilm filtration apparatus for water treatment that removes suspended substances and dissolved organic substances at the same time to smoothly purify the discharged water and increase treatment efficiency.

Severe destruction of the natural environment, such as pollution of rivers or soils caused by sewage or wastewater sent from river water, industrial sites or general households into sewage and wastewater treatment plants, especially when the concentration of phosphorus is high in stagnant basins of rivers. Algae are generated by eutrophication, and organic matter also depletes oxygen, which in turn causes various adverse effects on the water system.

Therefore, in order to improve the quality of river water, special management is needed, such as expanding and strengthening the total water quality standards for the discharged water (inflow water) of the river water treatment and the sewage and wastewater treatment plants, and the floating and dissolved organic substances.

Various methods for purifying the effluent of the river water and the sewage treatment plant have been performed, that is, by injecting a coagulant into the effluent to aggregate the foreign matter (total phosphorus, suspended matter, dissolved organic matter, etc.) to generate flocs. The effluent containing the above floc is passed through sand or filter medium for filtration and purification, or the floc is precipitated and floated for purification.

In the above precipitation and flotation methods, in order to form coarse flocs according to the inflow water quality, in addition to flocculants, flocculent aids, weighted flocculants, etc., as well as chemicals such as oxidizing agents and bases are required, as well as treatment water quality. There was a big problem with volatility.

In addition, in the filtration method, clogging occurs quickly in the filter medium due to foreign matter passing through the filter medium, and a lot of backwashing water is used to backwash the filter medium for the clogging phenomenon, and the flocks collected in the filter medium easily detach from the filter medium. Not only is there a problem that the efficiency of the installation is lowered as the removal efficiency of the dissolved organic material is low by simply collecting the aggregated particulate matter.

Recently, many methods and apparatuses for purifying various types of influent water, including the above method, have been developed.

Applicant simplifies the structure and apparatus for purifying influent water than before, and purifies the influent to a cleaner state by simultaneously removing the total phosphorus and suspended solids and dissolved organic substances contained in the influent. In order to increase the efficiency of the purification process of the influent was developed.

Domestic Utility Model Registration No. 0264193 (2002.01.30.) Domestic Patent Registration No. 0474106 (2005.02.21.) Domestic Patent Registration No. 092009 (2009.09.25.)

The present invention has been proposed in order to solve the problems in the prior art as described above, to provide a water treatment biofilm filtration device which is a chemical treatment by a flocculant and a biological treatment by microorganisms at the same time to provide a structure of the biofilm filtration device for water treatment. Simplified, as well as smooth removal of the total phosphorus, suspended matter, dissolved organic matter, etc. contained in the effluent (influent) of the river water or sewage and wastewater treatment plant by chemical and biological treatment methods to more effectively remove the effluent from the river water or sewage and wastewater treatment plant The purpose is to improve the purification treatment efficiency as well as to purify the clean state in a short time.

In the present invention for achieving the above object, in the filtration apparatus for removing and purifying foreign matter, such as suspended solids, dissolved organic substances, and the like contained in the effluent (influent water) of the river water or wastewater treatment plant, The inflow water is introduced and contained, as well as an inflow water storage tank having a discharge pump for pumping the inflow water to the outside, and the inflow water sent from the inflow water storage tank is introduced and a coagulant is added to the foreign matter contained in the inflow water by the flocculant The inflow water to instantaneously mix the influent and the flocculant so as to form a fine floc and agglomerate foreign matter and each fine floc which are not agglomerated in the inflow flowing from the line mixer so that the particles are formed into large coarse flocs. Agglomeration tank for stirring the inflow water flowing from the flocculation tank The biofilm filter tank having a plurality of filter layers for purifying the influent with treated water while removing coarse flocs from the foreign matter contained in the filter as well as removing the dissolved organic substances, and the purified treatment sent from the biofilm filter tank. A treatment water storage tank into which water is introduced and stored, and is provided between the biofilm filtration tank and the treatment water storage tank to send air into the biofilm filtration tank and the treated water in the treatment water storage tank according to the level of the biofilm filtration tank to filter each of the biofilm filtration tanks. Provided is a biofilm filtration apparatus for water treatment, characterized in that the backwashing unit is configured to backwash the layers.

According to the present invention made as described above, by the flocculant to generate and remove the foreign matter (total phosphorus, suspended matter, dissolved organic matter, etc.) contained in the discharge water (influent water) of the river water or waste water treatment plant By providing a water treatment biofilm filtration device equipped with a line mix, agglomeration tank, and a biofilm filtration tank to simultaneously perform chemical treatment and biological treatment by microorganisms to be adsorbed and removed by the microorganism, the structure of the biofilm filtration device for water treatment can be improved. In addition to reducing manufacturing and installation costs and operating costs, not only is it easy to maintain, but also the chemical and biological treatments are performed simultaneously, so that foreign substances such as total phosphorus, suspended matter, and dissolved organic matter contained in the influent can be removed. Smooth treatment to clean up the influent at a faster time Also purification process to the process can, of course has the effect to increase the purifying efficiency.

In addition, the biofilm filtration apparatus for water treatment comprises a backwashing equipment unit including a backwash air inflow line, a backwash pump, a backwash line, a backwash drainage pipe, and the like, wherein the backwashing equipment section includes air and a biofilm filtration tank of the biofilm filtration device for water treatment. By sequentially supplying the treated water to backwash each filtration layer of the biofilm filtration tank, there is an effect of improving the filtration efficiency and the purification treatment efficiency of the biofilm filtration device for water treatment.

1 is a structural diagram showing a biofilm filtration device for water treatment of the present invention.
FIG. 2 is a detailed enlarged view illustrating a lower collecting part of a biofilm filtration tank in the biofilm filtration device for water treatment showing the enlarged portion A of FIG. 1.

Hereinafter, the biofilm filtration device for water treatment according to the present invention will be described in more detail with reference to FIGS. 1 and 2.

The present invention, the chemical treatment by the coagulant and the biological treatment of foreign substances such as total phosphorus, suspended matter, dissolved organic substances, etc. contained in the contaminated river water or effluent water (hereinafter referred to as "influent water") of the waste water treatment plant The water treatment biomembrane filtration device is provided to purify the inflow water (iw) with clean water (cw) as it is simultaneously filtered or adsorbed and removed.

As shown in FIG. 1, the biofilm filtration device for water treatment is provided with an inflow water storage tank 10 into which inflow water iw is introduced through the inflow water inflow pipe 11, and in the inflow water storage tank 10. A discharge pump 12 is installed to pump the inflow water iw to discharge the inflow water iw in the inflow water storage tank 10 to the outside.

The inflow water storage tank 10 may further increase the efficiency of the chemical treatment device and the biofilm filtration device by absorbing the fluctuation of the inflow so that a constant flow rate may be transferred to the rear stage process.

Inflow water (iw) discharged by the pumping force of the discharge pump 12 is introduced into the side of the inflow water storage tank 10 and a coagulant (c) is introduced from the outside to the inflow water (iw) by the coagulant (c) The foreign matter contained in the foreign material, that is, the line mix 20 is instantaneously mixed with the inflow water (iw) and the flocculant (c) to produce a fine floc (floc) as the aggregates and suspended matter in the foreign matter is installed.

Here, since the hydration reaction of the flocculant (c) is made in a very short time, that is, 0.001 ~ 1 second, the coagulant (c) is added after the addition of the flocculant (c) in order to effectively aggregate the foreign matter, etc. The flocculant (c) should be uniformly diffused, and the line mix 20 is used as a device for accomplishing this.

On the side of the line mix 20, coarse flocs having large particles by agglomerating foreign particles (total phosphorus, suspended solids, etc.) and each fine floc that are not aggregated in the inflow water iw sent from the line mixer 20. Agglomeration tank 30 is provided to stir the inflow water iw to be generated.

The front end portion of the flocculation tank 30 prevents rapid turbulence of the inflow water iw including the fine floc that is sent from the line mix 20 into the flocculation tank 30 and flows into the inflow water iw. At least one hole plate 31 having a plurality of hole holes 311 is provided to prevent breakage of the microfluids included therein, and each hole plate 31 passes through the rear end of the flocculation tank 30. An agitator 32 is provided to agitate the influent to increase the number of collisions between the foreign matter and the microflux contained in one influent (iw) to produce coarse flocks of particles larger than the particles of the microflux.

In the flocculation tank 30, in consideration of the strength and size of the flocs generated in the flocculation tank 30, foreign substances and fine flocks contained in the inflow water iw in the flocculation tank 30 are coarse flocs. Agglomeration aid (c ') may be added to cause the agglomerate.

The inflow water (iw) sent from the agglomeration tank 30 is introduced into the side of the coagulation tank 30 as well as adsorbs and removes dissolved organic substances among foreign matters contained in the inflow water iw. A biofilm filtration tank 40 is provided for filtering the coarse flocs to purify the inflow water iw with clean water.

The biofilm filtration tank 40 is provided with a plurality of filtration layers that adsorb dissolved organic materials among foreign matters contained in the influent (iw) as well as filter out coarse flocs.

The biofilm filtration tank 40 collects coarse flocs contained in the inflow water (iw) that is sent from the flocculation tank 30 into the biofilm filtration tank 40, and further promotes adhesion of microorganisms to absorb and remove dissolved organic substances. This possible hydrophilic carrier 41 is provided, the lower portion of the hydrophilic carrier 41, microparticles or coarse floccules of undeleted particles of foreign matter contained in the inflow water (iw) passing through the hydrophilic carrier 41 and A filtration layer section 42 is provided to prevent the detached biofilm from leaking into the treated water cw.

A lower portion of the filtration layer 42 is provided with a support layer 43 for supporting the hydrophilic carrier 41 and the filtration layer 42, and a lower portion of the support layer 43 is the hydrophilic carrier 41. And a lower collecting part 44 through which the purified treated water cw is collected while passing through the filtration layer part 42.

That is, the submersible carrier 41, the filtration layer portion 42, the support layer portion 43 and the lower collecting portion 44 are sequentially installed from the upper portion to the lower portion of the biofilm filtration tank 40 in the biofilm filtration tank 40 have.

The hydrophilic carrier 41 of the biofilm filtration tank 40 is made of activated carbon, anthracite, or the like, capable of proliferating microorganisms as well as having excellent adhesion and processing efficiency.

The hydrophilic carrier 41 has an effective particle diameter of 2 to 3 mm in consideration of the filtration resistance according to the flow of the influent (iw) to facilitate the adsorption of dissolved organic substances in the influent (iw). When the effective particle diameter of the hydrophilic carrier 41 is less than or equal to 2 mm, the filtration resistance of the hydrophilic carrier 41 is high, so that the inflow of water (iw) does not flow smoothly, and the effective particle diameter of the hydrophilic carrier 41 is 3 mm. As described above, as the treated water flows rapidly through the hydrophilic carrier 41, there is a problem in that the hydrophilic carrier 41 does not perform the adsorption of the dissolved organic substance.

The filtration layer part 42 is to prevent the microfluidic or coarse floccule and the detached biofilm from the foreign matter contained in the inflow water (iw) passing through the hydrophilic carrier 41 to flow out into the treated water (cw). The thick sand layer is filled, and the support layer portion 43 is filled with gravel to support the hydrophilic carrier 41 and the filtration layer portion 42.

The effective particle size of the coarse sand filled in the filter layer portion 42 is formed to 1 ~ 2mm, the effective particle diameter of the gravel filled in the support layer portion 43 is formed to 5 ~ 10mm, the filter layer portion 42 ) Or an effective particle diameter of 1 mm or less, or when the effective particle diameter of the support layer portion 43 is 5 mm or less, the flow of the treated water passing through the hydrophilic carrier 41 is not smooth, and the effective filter layer portion 42 is effective. If the particle diameter is 2 mm or more or the effective particle diameter of the support layer part 43 is 10 mm or more, as the flow of the treated water passing through the hydrophilic carrier 41 occurs quickly, the function of the filter layer part 42 and the support layer part 43 is reduced. There is a problem that does not work properly.

As shown in FIGS. 1 and 2, the lower collecting portion 44 of the biofilm filtration tank 40 passes through the hydrophilic carrier 41 and the filtration layer 42 in the lower portion of the biofilm filtration tank 40. A strainer block 441 having a plurality of coupling holes 441a through which the treated water cw purified by the treatment passes is provided at a predetermined height from the bottom in the biofilm filtration tank 40, and in the biofilm filtration tank 40. Between the bottom and the strainer block 441, the strainer block 441 is spaced apart by a certain height from the bottom in the biofilm filtration tank 40 so that the treated water cw is collected in the lower collecting part 44. A plurality of support portions 442 supporting the block 441 are provided, and each coupling hole 441a of the strainer block 441 is purged while passing through the hydrophilic carrier 41 and the filtration layer portion 42. Doing treated water (cw) House may strainer portion 443 through which the treatment of the (cw) are each coupled to a water collecting reservoir (44).

Each support portion 442 of the lower catchment portion 44 is formed in a column or plate shape so as to be orthogonal to the strainer block 441. When the support portions 442 form a plate shape, the respective support portions 442 As shown in FIG. 2, communication holes 442a are formed in the lower portion of the strainer block 441 so that the air and the treated water flowing in and out of the backwashing process, which will be described later, will flow freely in and out. Each support portion 442 has one or more communication holes 442a formed therein.

On the side of the biofilm filtration tank 40, a treatment water storage tank 50 into which the treated water cw purified in a clean state sent from the biofilm filtration tank 40 is introduced and stored is installed, and the treatment water storage tank ( The treated water (cw) in 50) can be discharged to rivers or rivers, or reused as industrial water, sprinkling water, and backwashing water in biofilm filtration devices for water treatment.

Between the biofilm filtration tank 40 and the treatment water storage tank 50, air (a) and the treated water in the treatment water storage tank 50 into the biofilm filtration tank 40 according to the water level of the biofilm filtration tank 40. ), The hydrophilic carrier 41 and the filtration layer 42 are passed through the filtration layers of the biofilm filtration tank 40, that is, the hydrophilic carrier 41, the filtration layer 42, and the support layer 43 in the reverse order. The back washing facility 60 for back washing is provided.

The backwashing unit 60 includes a lower collecting part 44, a support layer part 43, a filtration layer part 42, and a hydrophilic carrier 41 of the biofilm filtration tank 40 at a lower portion of the biofilm filtration tank 40. A reverse air inlet line 61 is provided to supply air a into the biofilm filtration tank 40 so as to remove foreign substances attached to the hydrophilic carrier 41 and the filtration layer part 42 while sequentially passing through them. In the treatment water storage tank 50, a backwash pump 62 is installed to pump the treatment water cw to send the treatment water cw in the treatment water storage tank 50 into the biofilm filtration tank 40. Between the biofilm filtration tank 40 and the treated water storage tank 50, the treated water cw pumped by the backwash pump 62 is sent to the lower collection section 44 of the biofilm filtration tank 40 to receive the lower collection section ( 44, the support layer portion 43, the filtration layer portion 42 and the hydrophilic carrier 41 while sequentially passing through the hydrophilic carrier A backwashing line 63 is provided to supply the treated water cw into the biofilm filtration tank 40 so as to wash the 41 and the filtration layer 42. The air above the biofilm filtration tank 40 is provided. And foreign matters, which are separated from the hydrophilic carrier 41 and the filtration layer 42 by the treated water and present in the upper water layer of the biofilm filtration tank 40, that is, foreign matters such as microfluidic and coarse flocs together with the inflow water (iw). The backwash drain pipe 64 is installed to discharge to the associated facility (primary sedimentation tank or inflow pumping station) installed outside the biofilm filtration tank 40.

The biofilm filtration tank 40 is provided with a water level sensor 65 for detecting the water level in the biofilm filtration tank 40 to stop and operate the backwashing facility 60 according to the water level in the biofilm filtration tank 40. .

According to the present invention configured as described above, the inflow water (iw) containing foreign matters such as total phosphorus or various contaminants such as suspended substances and dissolved organic substances is introduced into the inflow water storage tank 10 through the inflow water inlet pipe 11, and the inflow water (iw) is temporarily stayed in the inflow water storage tank 10 and then sent to the line mix 20 by the discharge pump 12.

In the line mix 20, as the instantaneous mixing of the inflow water (iw) and the coagulant (c) introduced into the line mix 20, total phosphorus and suspended solids among the foreign substances contained in the inflow water (iw) by the coagulant are Agglomeration produces fine flocs.

The inflow water iw instantaneously mixed in the line mix 20 is sent to the flocculation tank 30, and the inflow water iw including the fine floc sent to the flocculation tank 30 is the front end of the flocculation tank 30. The rapid turbulence phenomenon is prevented by the hole plate 31 installed in the portion, and passes through each hole hole 311 of the hole plate 31 and is sent to the rear end of the flocculation tank 30.

Inflow water (iw) that is passed through each of the hole plate 31 to the rear end of the flocculation tank 30 is agitated by the stirrer 32 in the flocculation tank 30, the foreign matter contained in the inflow water (iw) And coarse flocs of particles larger than the particles of the fine floc as each fine floc collides with each other.

At this time, the coagulation aid (c ') may be introduced into the coagulation tank 30, that is, the coagulation aid (c') in consideration of the strength and size of the flocs (floc) generated in the coagulation tank (30). By the coagulation is smoothly made between the foreign matter and the fine flocks contained in the inflow water (iw) in the flocculation tank (30) by adding the coagulation efficiency can be further increased.

Inflow water (iw) in which the foreign matter is aggregated into the coarse floc in the coagulation tank 30 is sent to the biofilm filtration tank 40, introduced into the biofilm filtration tank 40, passing through each filtration layer, and included in the coarse water iw. The floc is filtered and removed as well as dissolved organic matter is adsorbed and removed to purify with clean treated water (cw).

Here, the state in which the inflow water (iw) is purified by the biofilm filtration tank 40 to the treated water (cw) will be described. Inflow water (iw) introduced into the biofilm filtration tank 40 may be activated carbon capable of attaching and growing microorganisms. Dissolved organic matter contained in the influent (iw) by the microorganisms (dependent nutrient aerobic microorganisms and heterotrophic random microorganisms) attached to the hydrophilic carrier 41 while passing through the hydrophilic carrier 41 using a material such as anthracite As a denitrification process occurs in which a substance is adsorbed and decomposed, the dissolved organic substance is removed, and coarse flocks generated in the coagulation tank 30 are mostly removed while passing through the hydrophilic carrier 41.

In addition, the inflow water iw passing through the hydrophilic carrier 41 passes through the filtration layer 42 made of coarse sand, and the microfluids and desorbed biofilms removed from the hydrophilic carrier 41 are captured. .

Through the hydrophilic carrier 41, the filtration layer portion 42 and the support layer portion 43, the treated water cw purified in a clean state flows into the lower portion of the lower collection portion 44 and is collected. Passed through a plurality of strainers 443 coupled to the strainer block 441 of the water portion 44 is introduced into the space formed between the strainer block 441 and the bottom of the biofilm filtration tank 40 is collected.

The treated water (cw) collected in the lower collecting part 44 of the biofilm filtration tank 40 is sent to and stored in the treated water storage tank 50 through the treated water flow path 51 and stored in the treated water storage tank 50. The stored treated water (cw) is discharged into rivers or rivers, or reused as industrial water, sprinkling water and backwashing water of biofilm filtration devices for water treatment.

On the other hand, if the inlet water (iw) is continuously purified in the biofilm filtration tank 40, suspended matter is accumulated in the hydrophilic carrier 41 and the filtration layer 42, the hydrophilic carrier 41 and the filtration layer 42 Because the pores of the membrane are blocked, the purification capacity of the biofilm filtration device for water treatment is lowered.

Therefore, in order to secure voids of the hydrophilic carrier 41 and the filtration layer 42, the hydrophilic carrier 41 and the filtration layer 42 are washed by the backwashing unit 60.

Referring to the operating state of the backwashing equipment 60, the air gap between the hydrophilic carrier 41 and the filtration layer 42 by the suspended solids contained in the influent (iw) in the process of purifying the influent (iw). As a result of the clogging, the filtration rate is lowered, and the water level in the biofilm filtration tank 40 is increased. When the water level in the biofilm filtration tank 40 is increased by a predetermined level or more, the water level sensor 65 automatically detects the backwashing process. Proceed.

That is, when the water level in the biofilm filtration tank 40 rises by a predetermined level or more, the air (a) flows into the sewage collecting portion 44 of the biofilm filtration tank 40 through the back-air air inflow line 61 installed under the biofilm filtration tank 40. Is supplied.

The supplied air (a) passes through the strainer 443 of the lower collecting portion 44 and sequentially passes through the filtration layer portion 42 and the hydrophilic carrier 41, and the hydrophilic carrier 41 and the filtration layer portion 42. ) While removing the foreign matter attached to the hydrophilic carrier 41 and the filtration layer 42 and the foreign matter collected between the hydrophilic carrier 41 and the filtration layer 42, the hydrophilic carrier 41 and the filtration layer ( Secure the gap in 42).

Then, the treated water cw pumped by the pumping force of the backwash pump 62 installed in the treated water storage tank 50 is the biofilm filtration tank 40 in the treated water storage tank 50 through the backwashing line 63. Flows into the lower catchment section (44).

The treated water cw introduced into the lower collecting part 44 sequentially passes through the support layer part 43, the filtration layer part 42, and the hydrophilic carrier 41, and the hydrophilic carrier 41 and the filtration layer part 42. The hydrophilic carrier 41 and the filtration layer part 42 are backwashed by sending the foreign matter separated from the separation to the upper part of the biofilm filtration tank 40, that is, the upper water layer of the inflow water iw in the biofilm filtration tank 40. do.

Foreign substances, such as microfluids and coarse flocs, that are sent to the upper portion of the biofilm filtration tank 40 by the air (a) and the washing water (cw) are transferred to the biofilm filtration tank through the backwash drainage pipe 64 together with the inflow water (iw). 40 is discharged to the outside.

This backwashing process is performed in sequence at regular intervals by the pre-set backwashing program and is automatically completed and restarted.

The biofilm filtration device for water treatment is a chemical treatment by a flocculant and a biological treatment by microorganisms at the same time, the biofilm filtration device for water treatment effectively removes foreign substances such as total phosphorus, suspended matter, dissolved organic matter, etc. contained in the influent (iw). By removing and purifying in a clean state, it is possible to increase the purification treatment efficiency.

As described above, the biofilm filtration apparatus for water treatment according to the present invention has been described with reference to the illustrated drawings, but the present invention is not limited by the embodiments and drawings described herein, and various modifications are made by those skilled in the art within the technical scope of the present invention. Modifications may be made and thus should not be individually understood from the technical spirit or prospect of the present invention.

10: influent storage tank 11: influent inlet pipe
12: discharge pump 20: line mix
30: coagulation tank 31: hole plate
32: stirrer 40: biofilm filtration tank
41: hydrophilic carrier 42: filter layer
43: support layer 44: lower catchment
50: treated water storage tank 51: treated water flow path
60: backwash equipment 61: backwash air inlet line
62: backwash pump 63: backwash line
64: backwash drain pipe 65: water level sensor
311: Merit 441: Strainer Block
441a: coupling hole 442: support
442a: communication hole 443: strainer

Claims (8)

In the filtration apparatus for removing and purifying foreign matter such as total phosphorus, suspended matter, dissolved organic matter, etc. contained in the effluent (influent water) of the river water or wastewater treatment plant,
The inflow water storage tank is provided with a discharge pump for pumping the inflow water to the outside as well as the inflow water, and
A line mixer which instantaneously mixes the inflow water and the flocculant so that the inflow water sent from the inflow water storage tank is introduced and a coagulant is introduced to form a fine floc with the foreign matter contained in the inflow water by the coagulant;
An agglomeration tank for agitating the inflow water so as to aggregate the fine particles and the fine flocks which are not agglomerated in the inflow water flowing from the line mixer to form large coarse flocs;
A biofilm filtration tank having a plurality of filtration layers for purifying and treating the influent with treated water as well as removing coarse flocs among foreign substances contained in the inflow water sent from the flocculation tank and removing dissolved organic substances;
A treated water storage tank into which the purified treated water sent from the biofilm filtration tank is introduced and stored;
It is provided between the biofilm filtration tank and the treatment water storage tank is configured to send back the air and the treated water in the treatment water storage tank according to the water level of the biofilm filtration tank is configured to backwash each filter layer of the biofilm filtration tank Biofilm filtration device for water treatment, characterized in that.
The method of claim 1,
The front end of the coagulation tank is provided with at least one hole plate having a plurality of pores to prevent turbulence of the inflow water containing the fine flocks flowing into the coagulation tank, as well as to prevent destruction of the fine flocks,
And a stirrer at the rear end of the coagulation tank is provided with an agitator to stir the inflow water to produce coarse flocs included in the inflow water passing through each of the perforated plates.
3. The method according to claim 1 or 2,
The biofilm filter for water treatment, characterized in that the flocculation tank to agglomerate foreign matter contained in the inflow water in the flocculation tank, as well as a coagulation aid to agglomerate fine flocs into coarse flocs.
The method of claim 1,
In the biofilm filtration tank,
A hydrophilic carrier capable of attaching and growing microorganisms to collect coarse flocks among foreign matters contained in the inflow water introduced into the biofilm filtration tank and to adsorb and remove dissolved organic substances;
A filtration layer part installed at the lower portion of the hydrophilic carrier to prevent the microfluids and desorbed biofilms from the foreign substances contained in the inflow water passing through the hydrophilic carrier to be discharged into the treated water;
A support layer portion provided below the filtration layer portion to support the hydrophilic carrier and the filtration layer portion;
And a lower collecting part installed below the supporting layer part and collecting the treated water purified while passing through the hydrophilic carrier and the filtering layer part.
The method of claim 4, wherein
The hydrophilic carrier of the biofilm filtration tank is activated carbon or anthracite material capable of attaching and growing microorganisms, and the effective particle diameter of the hydrophilic carrier is 2 to 3 mm.
The method of claim 4, wherein
The lower collecting part of the biofilm filtration tank is
A strainer block having a plurality of coupling holes installed at a predetermined height from a bottom in the biofilm filtration tank,
A support part installed between the bottom of the biofilm filtration tank and the strainer block to separate the strainer block by a predetermined height from the bottom of the biofilm filtration tank, as well as supporting the strainer block;
And a strainer through which the treated water passes through each of the coupling holes of the strainer block to pass through the hydrophilic carrier and the filtration layer to collect the treated water.
The method according to claim 6,
The support portion of the lower collecting portion is formed in a plate shape, the plate-shaped support portion biofilm filter device for water treatment, characterized in that one or a plurality of communication holes are formed so that the flow of water can flow freely.
The method according to claim 1 or 4,
The backwashing facility part,
It is installed in the lower part of the biofilm filtration tank and the air is supplied back into the biofilm filtration tank to remove foreign substances attached to the hydrophilic carrier and the filtration layer while sequentially passing through the lower collecting portion, the support layer, the filtration layer and the hydrophilic carrier of the biofilm filtration tank. Air inlet line,
A backwash pump installed in the treated water storage tank to pump the treated water to direct the treated water in the treated water storage tank into the biofilm filtration tank;
The treated water pumped by the backwash pump is sent to the lower collecting part of the biofilm filtration tank to sequentially pass through the lower collecting part, the support layer part, the filtration layer part, and the hydrophilic carrier to wash the hydrophilic carrier and the filtration layer part into the biological membrane filtration tank. Backwash line to supply
It is installed on the upper side of the biofilm filtration tank is separated from the hydrophilic carrier and the filtration layer by the air and the treated water is composed of a backwash drain pipe for discharging foreign substances present in the upper water layer of the biofilm filtration tank to the outside Biofilm filtration device for water treatment.

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