KR100887567B1 - Wastewater treatment unit - Google Patents

Abstract

The present invention relates to a wastewater treatment apparatus, wherein the wastewater treatment apparatus includes a sedimentation tank for precipitating solids in the wastewater, a flow adjustment tank for adjusting the treatment flow rate of the wastewater, and an aerobic tank including a hanging bio contactor ring (HBC ring). And a mineral carrier layer containing a porous mineral material, and a contact filter layer comprising a wood piece and a microorganism supported on the wood piece, wherein the denitrification and man-made which purifies waste water by intermittent aeration occurs, and aeration occurs. After the foam | bubble to remove is included, the defoaming and discharge tank which discharges treated water is included.

The wastewater treatment apparatus can remove phosphorus and nitrogen at one time from one reactor, and the phosphorus and nitrogen removal efficiency is excellent.

Description

Wastewater Treatment System {DEVICE FOR TREATING WASTE WATER}

The present invention relates to a wastewater treatment apparatus, and to a wastewater treatment apparatus capable of removing phosphorus and nitrogen at one time from one reactor and having an excellent removal efficiency of phosphorus and nitrogen.

Due to the recent rapid urban concentration and industrial development of the population, urban sewage and industrial wastewater have not only increased quantitatively, but also the quality of pollution has increased. This quantitative and qualitative increase in wastewater has become a big problem for modern society, and economic and effective treatment of it has become a man's immediate task to pursue economic development and a pleasant life.

However, the conventional wastewater treatment facility focuses only on the removal of organic matter, and the removal of nitrogen and phosphorus is hardly achieved. Nitrogen and phosphorus contained in wastewater destroy ecosystems by causing sub-catalysis of lakes, streams, and even nearby waters.

In January 1996, the government began to regulate the total nitrogen and total phosphorus content in sewage treatment plants only. However, in the small-scale wastewater treatment facilities, there is no special method for the total nitrogen and total phosphorus treatment. Is difficult.

Anaerobic / anoxic / oxic (A ² / O), modified bardenpo, UCT (university of cape town), or VIP (virginia initiative plant) techniques are generally known. These methods are slightly different, but they are all variations of the existing activated sludge aeration process.

That is, a method of adding anaerobic reactors and anoxic reactors and arranging anaerobic tanks, anoxic tanks, and aerobic tanks in order in a continuous flow reactor in order to achieve removal of organic matter, nitrogen, and phosphorus. However, even this is required an excessive installation area and installation cost, the management is also not easy to obtain a great response.

It is an object of the present invention to provide a wastewater treatment apparatus which can remove phosphorus and nitrogen at one time in one reactor and has excellent phosphorus and nitrogen removal efficiency.

In order to achieve the above object, according to one embodiment of the present invention, a sedimentation tank for precipitating solids in the waste water, a flow adjusting tank for adjusting the treatment flow rate of the waste water, a hanging bio contactor ring (HBC ring) An aerobic tank, a mineral carrier layer containing porous minerals, and a contact filtration layer comprising a wood piece and a microorganism supported on the wood piece, and denitrification / artificial for purifying waste water by intermittent aeration. The present invention provides a wastewater treatment apparatus including a defoaming and discharge tank for discharging treated water after removing bubbles generated at the time.

The mineral carrier layer is provided on the inlet side of the denitrification / artificial, the contact filtration layer is installed on the outlet side of the denitrification / artificial, and a partition wall having an open bottom is provided between the mineral carrier layer and the contact filtration layer. The waste water can be transferred from the mineral carrier layer to the contact filtration layer through the bottom of the partition wall.

The intermittent aeration may be repeated aeration and non-aeration so that the ratio of the aeration time to the non-aeration time is 0.7 to 0.75.

The intermittent aeration is made at the bottom of the mineral carrier layer, and during sludge denitrification / phosphorus aeration, sludge at the bottom of the denitrification / artificial tank is transferred to the upper part of the mineral carrier layer to provide an upper portion of the mineral carrier layer. Can be sprayed on.

The wastewater treatment apparatus includes a passage connecting the sedimentation tank and the flow rate adjustment tank, and the passage may be installed at a position of 1/3 to 2/3 of the height of the flow rate adjustment tank.

The wastewater treatment apparatus includes a passage connecting the sedimentation tank and the flow rate adjustment tank, wherein the sedimentation tank is formed to protrude around the passageway on the wall surface on which the passageway is formed, and faces a surface facing the passageway and faces the bottom of the needle tank. The viewing face may include an open blocking member.

The wastewater treatment apparatus may include a passage connecting the flow regulating tank and the aerobic tank, and may include a mineral carrier layer including a neck piece and a microorganism supported on the neck piece at the inlet of the passage.

The porous mineral material may include any one selected from the group consisting of elvan, pozzolan, zeolite, loess, and combinations thereof.

Wastewater treatment apparatus according to an embodiment of the present invention can remove the phosphorus and nitrogen at one time in one reactor, it is excellent in the removal efficiency of phosphorus and nitrogen.

Hereinafter, exemplary 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. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. Like parts are designated by like reference numerals throughout the specification.

1 is a cross-sectional view of a wastewater treatment apparatus according to an embodiment of the present invention, FIG. 2 is an enlarged cross-sectional view of part A of FIG. 1, and FIG. 3 is an enlarged perspective view of part B of FIG. 1.

Referring to Figure 1, the wastewater treatment apparatus 100 according to an embodiment of the present invention, the sedimentation tank 110, the flow adjustment tank 120, the aerobic tank 140, denitrification, artificial 150, and the defoaming and discharge tank 160. The wastewater treatment apparatus 100 may further include a concentration tank 130.

The wastewater treatment apparatus 100 may include a mineral carrier layer 152 and a contact filtration layer 153 in one denitrification / artificial chamber to remove phosphorus and nitrogen at once. In addition, the wastewater treatment apparatus 100 nitrates ammonia or organic nitrogen in the aerobic tank 140 and then denitrates and reduces nitric acid in the artificial tank 150, so that the total nitrogen contained in the wastewater is excellent in removing efficiency. In the artificial tank 150, an intermittent aeration can be performed to allow for advanced processing of nitrogen.

The sedimentation tank 110 receives wastewater through the inlet pipe 101. Wastewater often contains soil products. Soils settle in the pipes, impeding the flow of waste water, and wearing down equipment and pumps, and reducing the volume of the pipes. The sedimentation tank 110 precipitates the earth and sand, and floats the floating material or the oil component. At this time, the middle layer of the sedimentation tank 110 is naturally transported to the flow adjusting tank 120 so that the precipitated solids and the floating suspended matter are not transferred to the flow adjusting tank 120.

At this time, the flow adjustment tank inlet pipe 191 connecting the immersion tank 110 and the flow adjustment tank 120 is installed at a position 1/3 to 2/3 of the height of the flow adjustment tank 120. When the height of the flow adjusting tank inlet pipe 191 is within the above range, the solid precipitated from the sedimentation tank 110 and the floating floating material are not transferred to the flow adjusting tank 120, and the level of the flow adjusting tank 120 is increased. By changing the water level of the immersion tank 110 to the intermediate water level, the capacity of the flow rate adjustment can be increased.

2, the blocking member 115 is formed around the flow adjusting tank inlet pipe 191. The blocking member 115 is formed on the wall surface 112 of the immersion tank 110 and protrudes around the flow adjustment tank inlet pipe 191, and faces the flow adjustment tank inlet pipe 191 and the bottom of the immersion tank 110. The side facing the door is opened. The blocking member 115 prevents the solids precipitated by the shaking of the waste water or the floating suspended matter, etc., when the waste water is moved from the sedimentation tank 110 to the flow adjustment tank 120 to be mixed in the middle water. In addition, the blocking member 115 blocks the solids or suspended matter mixed in the middle layer water from being transferred to the flow adjusting tank 120.

The flow adjustment tank 120 adjusts the treatment flow rate of the waste water. The flow rate adjustment tank 120 includes three levels of the water level control sensor 123. When the water level of the flow control tank 120 is high, the feed rate of waste water is increased, and in the middle, the feed rate of waste water is normal, and when it is low, the feed rate of waste water is slowed.

The flow adjusting tank 120 includes an aeration device 121 that continuously supplies air into the flow adjusting tank 120. The aeration device 121 stirs the waste water and supplies oxygen to the microorganisms inhabiting the waste water, thereby actively decomposing organic components in the waste water. The aeration device 121 may be a rod-shaped diffuser.

The flow rate adjusting tank 120 transfers the wastewater to the exhalation tank 140 through the first transfer pipe 171 provided with the pump 181 at one end thereof. In addition, the flow rate adjustment tank 120 may transfer only the upper layer water of the flow rate adjustment tank 120 to the exhalation tank 140 through the second transfer pipe 172. The second transfer pipe 172 is to prevent the flow rate adjustment tank 120 from overflowing during a long power outage, and transfers only the upper water of the flow rate adjustment tank 120 to the exhalation tank 140.

When the flow adjusting tank 120 transfers the waste water to the aerobic tank 140 through the second transfer pipe 172, the flow adjusting tank 120 may pass the waste water through the first contact filtration layer 124 and then transfer the waste water. Only the supernatant water having passed through the first contact filtration layer 124 can be transferred to the aerobic tank 140 to reduce the biological oxygen demand (BOD) load of the aerobic tank and denitrification / artificial tank.

The first contact filtration layer 124 is a filtration layer containing various kinds of microorganisms supported on the neck piece. The wood piece activates the activity of the microorganisms and maintains the inside of the first contact filtration layer 124 at an appropriate temperature. The wood pieces can be produced using species such as cedar having a high water absorption and relatively low water-soluble extract. The neck piece may be processed to a size of 3 to 7 mm, or 5 to 7 mm to remove the fine powder, and then put into a vacuum impact drying furnace to remove the sap component and the pigment.

As a microorganism supported on the neck of the first contact filtration layer 124, any species can be used as long as it is a microorganism used for conventional wastewater treatment, and may include both aerobic and anaerobic microorganisms.

As microorganisms, aerobic autotrophic micro-organisms such as nitrosomonas and nitrobacter, which can oxidize ammonia, may be used. Aerobic autotrophic microorganisms grow by oxidizing ammonia with oxygen.

In addition, heterotrophic micro-oranism, such as aerobacter, bacillus, or micrococcus, which can reduce nitrate ions, may be used as the microorganism. Heterotrophic microorganisms can also breathe with oxygen, but when dissolved oxygen is depleted, nitrate ions are reduced to nitrogen gas while being used to decompose organic matter. In order to activate the denitrification of heterotrophic microorganisms, an anoxic environment must be maintained and a sufficient amount of organic matter must be supplied.

Exhalation tank 140 receives the waste water from the flow adjustment tank 120 to remove the organic matter. The aerobic tank 140 includes a suspension microbial contact ring 142. Suspension microbial contact ring 142 is configured by hanging a plurality of polyvinylidene chloride material thread on the loading stand. Suspension microbial contact ring 142 is a polyvinylidene chloride material as a contact material, by attaching a microorganism to the contact material to form a biofilm on the surface of the contact material. The microorganisms attached to the contact material begin to multiply and form rods.

When the biofilm reaches a certain thickness, the surface layer of the biofilm forms an aerobic layer, and the deep portion of the biofilm forms an anaerobic layer because oxygen cannot reach. Therefore, the suspension microbial contact ring 142 consumes oxygen and produces CO ₂ , H ₂ O in aerobic conditions, and releases gases such as CH ₂ , H ₂ O, NH ₃ by decomposing metabolites in anaerobic conditions. Interact with each other. Suspension microbial contact ring 142 has a very large contact area per unit length can produce the maximum waste water treatment effect even with a small volume.

The aeration tank 140 includes an aeration device 141 which aerations from the side of the suspension microbial contact ring 142. The aerobic tank 140 may prevent breakage of the suspension microbial contact ring 142 by aeration from the side, and by continuously supplying oxygen to the suspension microbial contact ring 142 by aeration, the suspension microbial contact ring 142 Can improve the wastewater treatment capacity.

The supernatant of the wastewater treated in the aerobic tank 140 is naturally transported to the denitrification / artificial 150 through the denitrification / artificial inlet pipe 192. The denitrification / artificial 150 includes a mineral carrier layer 152 containing a porous mineral material, and a second contact filtration layer 153 containing a neck piece and a microorganism supported on the neck piece. Purifies the waste water.

The mineral carrier layer 152 is provided on the inlet pipe 192 side of the denitrification / artificial 150, and the second contact filtration layer 153 is provided on the outlet side of the denitrification / artificial 150. Between the mineral carrier layer 152 and the contact filtration layer 153, a partition 154 having an open bottom is provided. The partition wall 154 allows waste water to be transferred from the mineral carrier layer 152 to the contact filtering layer 153 through the lower portion of the partition wall 154, thereby further improving the wastewater treatment efficiency of the contact filtering layer 153.

Waste water flowing into the denitrification / artificial 150 is removed through the mineral carrier layer 152 to remove organic matter, nitrogen, and phosphorus, and is solid-liquid separated while passing through the contact filtration layer 153 having wide pores and excellent absorbency. , Organics, nitrogen, and phosphorus are further removed and highly purified.

The porous mineral material included in the mineral carrier layer 152 may use any one selected from the group consisting of ganbanite, pozzolan, zeolite, ocher, and combinations thereof. Porous minerals are slowly and slowly decomposed to adsorb components such as nitrogen and phosphorus.

The second contact filtration layer 153 is a filtration layer having a neck piece as a contact material, and includes various kinds of microorganisms supported on the neck piece. As the microorganisms supported on the neck of the second contact filtration layer 153, any species of microorganisms conventionally used for wastewater treatment can be used, as described in the first contact filtration layer 124.

The wood piece activates the microorganism activity and maintains the inside of the second contact filtration layer 153 at an appropriate temperature. The wood pieces can be produced using species such as cedar having a high water absorption and relatively low water-soluble extract. The neck piece may be processed to a size of 3 to 7 mm, or 5 to 7 mm to remove the fine powder, and then put into a vacuum impact drying furnace to remove the sap component and the pigment.

The denitrification / synthesis 150 includes an aeration device 151 under the mineral carrier layer 152. The aeration apparatus 151 performs intermittent aeration which repeats aeration and non-aeration so that the ratio of aeration time to non-aeration time may be 0.7-0.75. When the ratio of the aeration time to the non-aeration time is 0.7 to 0.75, the removal efficiency of phosphorus and nitrogen of the mineral carrier layer 152 is improved.

The denitrification / artificial 150 can remove phosphorus by discarding the precipitated porous mineral sludge after luxury uptake of ingesting more phosphorus in an aerobic state. In addition, denitrification artifical 150 is the denitrification to sequential reduction in the oxygen-free state in which the oxygen supply disruption, the NO ₃ by using the organic substances in the incoming waste water to NO _2, NO, N ₂ O, N ₂ Nitrogen is released and removed to the atmosphere in the form of N ₂ gas.

The ratio of aeration time to non-aeration time has the same meaning as the ratio of aerobic period to anaerobic period or the ratio of nitriding rate to denitrification rate. For example, when the batch time of the denitrification / synthesis 150 is 2 hours, the aeration time is maintained at 50 minutes and the non-aeration time is 70 minutes. When the aeration begins, the dissolved oxygen level (DO) rises, and when the aeration is stopped, the dissolved oxygen level begins to gradually decrease to finally 0 mg / l. The dissolved oxygen level will remain at 0 mg / l until the aeration starts again. In other words, even if the aeration is stopped, denitrification and man-made aerobic conditions are maintained until the dissolved oxygen amount reaches 0 mg / l. Therefore, the removal efficiency of phosphorus and nitrogen can be improved by making ratio of aeration time with respect to non-aeration time being 0.7-0.75.

During intermittent aeration, the sludge at the bottom of the denitrification and synthetic 150 is transferred to the upper portion of the mineral carrier layer 152 and then sprayed onto the mineral carrier layer 152 through the spray nozzle 185. Can be. The sludge is conveyed by a fourth conveying pipe 174 provided with a pump 182 at one end. By aeration at the lower portion of the mineral carrier layer 152 and by injection of sludge at the top, the wastewater treatment ability of the mineral carrier layer 152 may be improved.

On the other hand, in the contact filtration layer 153, the suspended substances in the waste water are adsorbed to the microorganisms, and the microorganisms gradually thicken and desorb and settle. At the bottom of the denitrification / artificial 150, solid matters such as porous minerals decomposed by adsorbing nitrogen and phosphorus or microorganisms that have been thickened and desorbed and settled are accumulated. These solids are transferred to the concentration tank 130 through the third transfer pipe 173 including the pump 183 at one end. The transfer of the solids to the thickening tank 130 may be performed after the deaeration period of the denitrification / artificial 150 ends and before the aeration starts.

Hereinafter, the principle of nitrogen and phosphorus removal by intermittent aeration in the denitrification / artificial 150 will be described in more detail. First, nitrogen removal in the denitrification / artificial 150 uses a biological nitrate removal method.

The denitrification reaction, the final route of biological nitrogen removal, generally consists of two steps. The first step is the conversion of nitrate nitrogen to nitrite nitrogen, and the second step is the conversion of nitrite nitrogen to N ₂ , which is nitrogen gas.

In order for denitrification to occur, Do must first be very low, below 0.2 mg / l, and sufficient nitrate nitrogen must be present. The denitrification reaction is classified into anaerobic denitrification and aerobic denitrification according to Do. Aerobic denitrification is a process in which aerobic microorganisms convert ammonia to nitrite or nitrate ion in the presence of oxygen. Anaerobic denitrification is a process in which anaerobic microorganisms use nitrate nitrogen instead of oxygen as an electron acceptor to denitrify in the absence of oxygen. To cause. In the denitrification / synthesis 150, by forming an aerobic atmosphere and an anaerobic atmosphere alternately through an intermittent aeration, anaerobic denitrification and aerobic denitrification are repeated to remove nitrogen.

In addition, when the aeration is resumed in the denitrification / synthesis 150, the waste water is sprayed from the upper part of the mineral carrier layer to increase the contact area between the volatile contaminants such as ammonia and the air, thereby volatilizing and removing the volatile contaminants. have. At this time, the contact area with air is increased through the aeration apparatus 151 provided so that air flows back into the flow direction of water.

In addition, the pH of the wastewater flowing into the denitrification / artificial 150 is sufficiently raised to 11 or more to change ammonium ions (NH ₄ ⁺ ) present in the water into molecules of ammonia (NH ₃ ), and then contact with air to obtain a gaseous state. Blow In this case, to increase the pH of the influent wastewater, minerals such as lime may be used.

On the other hand, the removal of phosphorus from the denitrification and the artificial vessel 150 uses a removal method by a biological dephosphorization process. The biological dephosphorization process takes advantage of the property that microorganisms consume more phosphorus than necessary in aerobic conditions and release phosphorus taken in anaerobic conditions. Porous minerals of the mineral carrier layer 152 are slowly and finely dissolved, and are removed by agglomeration and sedimentation of high phosphorus emitted by microorganisms under anaerobic conditions. At this time, in order to increase the effect of precipitation, the second contact filtration layer 153 installed on the outlet side of the denitrification / artificial 150 adsorbs the suspended substances contained in the wastewater, and the suspended substances adsorbed gradually become thickened and desorbed and settled. In this case, the sedimentation rate is usually 1.5 to 2 times the precipitation. The settled suspended substances are transferred to the thickening tank 130 through the third transfer pipe 173, and through this method, the denitrification / artificial 150 can remove phosphorus.

When nitrogen and phosphorus are removed by the method as described above, the nitrogen removal efficiency of the denitrification and synthetic 150 is 80 to 90%, and the phosphorus removal efficiency of the denitrification and synthetic 150 is 90 to 98%.

The upper water of the denitrification / artificial 150 having passed through the contact filtration layer 153 of the denitrification / artificial 150 is transferred to the defoaming / discharging tank 160 through the inlet pipe 193 of the defoaming / discharging tank 160. do. The treated water transferred to the defoaming and discharging tank 160 is sprayed through the pump 184 to remove bubbles generated during the aeration in the exhalation tank 140. The dewatered treated water is discharged through the discharge pipe 102. In addition, the sludge at the bottom of the defoaming and discharging tank 160 can be transferred to the exhalation tank 140 by the fifth transfer pipe 175 provided with the pump 184 at one end.

On the other hand, after the waste water transferred to the concentration tank 130 precipitates the sludge, only the upper water is transferred to the flow rate adjustment tank 120 through the discharge pipe 194 of the concentration tank 130. The sludge settled in the concentration tank 130 is taken out from the wastewater treatment apparatus 100. In addition, the concentration tank 130 may include an aeration device 131.

The wastewater treatment apparatus 100 according to an embodiment of the present invention may simultaneously remove organic matter, nitrogen, and phosphorus in one reactor through an aerobic process and an anaerobic process caused by intermittent aeration. The denitrification / artificial 150 sprays the waste water through the spray nozzle 185 on the upper part of the mineral carrier layer 152, and flows back the waste water through the aeration device 151 at the bottom to precipitate and remove phosphorus by the mineral. In addition, nitrogen can be removed at the same time by ammonia degassing.

In addition, the wastewater treatment apparatus 100 releases phosphorus excessively ingested under aerobic conditions under anaerobic conditions, and removes it by chemical flocculation precipitation by porous minerals. At this time, the precipitation effect can be enhanced by the second contact filtration layer.

All simple modifications or changes of the present invention can be easily carried out by those skilled in the art, and all such modifications or changes can be seen to be included in the scope of the present invention.

( Example  One)

Raw water having a composition as shown in Table 1 below, which was treated in a livestock wastewater treatment plant, was treated using a wastewater treatment apparatus according to an embodiment of the present invention shown in FIG. 1. The BOD, chemical oxygen demand (COD), suspended solids (SS), total phosphorus (TP), and total nitrogen (TN) of the treated water treated using the wastewater treatment apparatus were measured, and the results are also shown in Table 1 below. It was.

At the time of treatment using a wastewater treatment apparatus, the one-hour time was 2 hours, and the ratio of the aeration time to the non-aeration time was 50 minutes / 70 minutes. In addition, the bottom layer sludge of the denitrification and the artificial was transferred to the upper part of the mineral carrier layer and sprayed.

( Example  2)

Wastewater was treated in the same manner as in Example 1 except that the treatment plant effluent having the composition as shown in Table 1 was used instead of the treatment plant raw water used in Example 1. BOD, COD, SS, T-P, and T-N of the treated water treated using the wastewater treatment apparatus were measured, and the results are also shown in Table 1 below.

TABLE 1

Raw water of treatment plant (mg / l) Treatment plant effluent (mg / l) Treatment plant efficiency (%) Example 1 Treated Water (mg / l) Example 1 Efficiency (%) Example 2 Treated Water (mg / l) Example 2 Efficiency (%) BOD 1540 1180 23.3 1.2 99.9 1.6 99.8 COD 840 840 0 64.0 92.3 148 83.3 SS 1310 490 62.5 57.3 95.6 60.0 87.7 T-N 311 653 -209 132 57.5 436 33.2 T-P 53.3 25.8 51.5 0.20 99.6 0.57 99.7

Referring to Table 1, in the case of a livestock wastewater treatment plant, the BOD treatment efficiency is 23.3%, the COD treatment efficiency is 0%, the SS treatment efficiency is 62.5%, and the TN treatment efficiency is -209%. In addition, the treatment efficiency of TP was 51.5%, the amount of total nitrogen was increased, and the removal efficiency of total phosphorus was also very low.

In contrast, in Example 1, the treatment efficiency of BOD is 99.9%, the treatment efficiency of COD is 92.3%, the treatment efficiency of SS is 95.6%, the treatment efficiency of TN is 57.5%, and the treatment efficiency of TP is It can be seen that it is 99.6%.

In addition, in Example 2, the processing efficiency of BOD is 99.8%, the processing efficiency of COD is 83.3%, the processing efficiency of SS is 87.7%, the processing efficiency of TN is 33.2%, and the processing efficiency of TP is 99.7. It can be seen that it is%.

The reason why Example 2 is lower in treatment efficiency than Example 1 is because the TN increased due to excessive use of flocculant during the treatment of the livestock wastewater treatment plant, and the TN treatment efficiency of the livestock wastewater treatment plant was also poor. .

Therefore, it can be seen that using the wastewater treatment apparatus according to one embodiment of the present invention can greatly improve the removal efficiency of total phosphorus and total nitrogen.

Although the preferred embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concepts of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

1 is a cross-sectional view of a wastewater treatment apparatus according to an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view of part A of FIG. 1;

3 is an enlarged perspective view of part B of FIG. 1;

<Description of Drawing>

100: wastewater treatment device 101: inlet pipe

102: discharge pipe 110: tide tank

112: wall surface of the silt tank 115: blocking member

120: flow adjustment tank 121: flow adjustment tank aeration device

123: level control sensor 124: first contact filtration layer

130: thickener 131: thickener aeration device

140: aerobic tank 141: aerobic tank aeration device

142: suspension microbial contact ring 150: denitrification, artificial

151: denitrification and artificial aeration device 152: mineral carrier layer

153: second contact filtration layer 154: partition wall

160: parcel and discharge tank 171: first transfer pipe

172: second transfer pipe 173: third transfer pipe

174: fourth transfer pipe 175: fifth transfer pipe

181: first transfer pipe pump 182: fourth transfer pipe pump

183: third transfer pipe pump 184: fifth transfer pipe pump

185: spray nozzle 191: flow adjustment tank inlet pipe

192: denitrification and artificial inlet pipe 193: defoaming and discharge inlet pipe

194: thickener discharge pipe

Claims (8)

Sedimentation tank for sedimenting solids in wastewater Receiving waste water from the sedimentation tank, flow rate adjusting tank for adjusting the flow rate of waste water, An aerobic tank receiving waste water from the flow rate adjustment tank and including a hanging bio contactor ring (HBC ring); The waste water is supplied from the aerobic tank, and includes a mineral carrier layer including the porous mineral material, and a contact filtration layer including a wood piece and a microorganism supported on the wood piece, to purify the waste water by intermittent aeration. Denitrification, artificial, and A defoaming / discharge tank for discharging the treated water after removing the bubbles generated during aeration by receiving the waste water purified by the denitrification / artificial water. Wastewater treatment device comprising a. The method of claim 1, The mineral carrier layer is provided on the inlet side of the denitrification and artificial, the contact filtration layer is provided on the outlet side of the denitrification and artificial, And a partition having a lower open portion between the mineral carrier layer and the contact filtration layer is provided such that the waste water is transferred from the mineral carrier layer to the contact filtration layer through the lower portion of the partition wall. The method of claim 1, The intermittent aeration system is a wastewater treatment apparatus to repeat the aeration and non-aeration so that the ratio of the aeration time to the non-aeration time is 0.7 to 0.75. The method of claim 1, The intermittent aeration is made at the bottom of the mineral carrier layer, And a sludge at the bottom of the denitrification / artificial material is transferred to an upper portion of the mineral carrier layer and sprayed onto the mineral carrier layer at the time of the denitrification / artificial aeration. The method of claim 1, The wastewater treatment device includes a passage connecting the sedimentation tank and the flow rate adjustment tank, The passage is waste water treatment apparatus is installed at a position 1/3 to 2/3 of the height of the flow adjustment tank. The method of claim 1, The wastewater treatment device includes a passage connecting the sedimentation tank and the flow rate adjustment tank, The sedimentation tank is formed so as to protrude around the passage of the wall surface on which the passage is formed, the surface facing the passage and the surface facing the bottom of the settlement tank includes a blocking member open. The method of claim 1, The wastewater treatment device includes a passage connecting the flow rate adjustment tank and the exhalation tank, The flow rate adjusting tank is a wastewater treatment apparatus comprising a contact filtration layer containing a neck piece and the microorganisms carried on the neck piece at the inlet of the passage. The method of claim 1 The porous mineral material is any one selected from the group consisting of ganbanite, pozzolan, zeolite, ocher, and combinations thereof.

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