KR200283062Y1 - Advanced Treatment Equipment and Process for Nitrogen and Phosphate Removal in Sewage and Wastewater - Google Patents

Abstract

The design of the wastewater and sewage nitrogen. The present invention relates to a wastewater and sewage treatment apparatus for phosphorus removal and a wastewater treatment method using the apparatus, in particular an anaerobic tank. It is a system for removing organic matter and nitrogen and phosphorus by using biological treatment using anoxic tank and fixed phase contact media and physical treatment method using immersion hollow fiber membrane.It is to remove organic matter and nitrogen and phosphorus contained in wastewater and sewage. processing the anoxic tank and, and treated water flows from the anoxic tank for organic matter in anaerobic conditions PHB {po ly-β of the raw water that has passed through the drum screen, inflow in the device and the denitrification internal conveyed nitrate nitrogen from crude oxidation in contact with oxygen-free state -hydroxybutyrate [(C ₄ H ₆ O ₂ ) n]; Polyhydric acid butyrate} and the contact oxidation tank is installed in the anaerobic tank, the treated water flows through the anaerobic tank and the fixed phase contact medium is installed in the aerobic conditions to remove residual organic matter, nitrification and over-intake reaction of phosphorus , Wastewater and sewage treatment apparatus including an immersion type membrane separation tank in which the treated water having passed through the contact oxidation tank is introduced and the residual organic matter and the final solid solution are separated.

Description

Advanced Treatment Equipment and Process for Nitrogen and Phosphate Removal in Sewage and Wastewater}

The present invention is a wastewater and sewage nitrogen. The present invention relates to a wastewater and sewage treatment apparatus for phosphorus removal, and a wastewater treatment method using the apparatus, in particular using a biological treatment using an anaerobic tank, anoxic tank and a fixed bed contact medium, and a physical treatment method using a submerged hollow fiber membrane. It is a system for removing organic matter and nitrogen and phosphorus in waste water and sewage.

O. Nitrogen in wastewater and sewage. Conventional techniques for simultaneous removal of phosphorus include processes developed in developed countries such as A2 / O, UCT, VIP, and Five-Stage Bradenpho. However, these processes are not suitable for domestic sewage phase, so they cannot be used as they are. Therefore, the process development and commercialization of nitrogen and phosphorus removal technology suitable for domestic situation in Korea is progressing. Organics and nitrogen. Physical, chemical, and biological treatments are used to purify phosphorus, but physical and chemical treatments are expensive because of the high equipment and chemical costs. There is a problem that the secondary pollution occurs, the biological treatment method is used a lot. In this biological treatment method, the purification method using microorganisms is a method in which microorganisms decompose organic matter and nutrients mixed in wastewater and sewage, and it takes a considerable residence time before microorganisms decompose organic matter and nutrients. It is difficult to secure stable treated water quality due to the decrease of sedimentation efficiency and difficulty of operation such as sludge injury in sedimentation tank separating solid-liquid.

The technical problem to be achieved by the present invention is to solve the problems as described above, organic matter and nitrogen by using a combination of biological and physical treatment method using an anaerobic tank, anaerobic tank and fixed bed contact media and immersion hollow fiber membrane. It is to provide a wastewater treatment apparatus and a treatment method that can improve the nutrient purification ability such as phosphorus and solve problems in the sedimentation tank through perfect solid-liquid separation.

In addition, the contact oxidation tank is separated and a water flow prevention inclined plate is installed inside to minimize the introduction of sludge into the membrane separation tank, and to prevent the membrane damage and premature blockage due to the media, thereby prolonging the cleaning cycle and the life of the membrane. The result is a reduction in the cost of expensive replacement and cleaning chemicals, resulting in lower operating and maintenance costs.

The present invention for achieving the above object is in the wastewater and sewage treatment apparatus for removing organic matter and nitrogen and phosphorus contained in the wastewater and sewage, raw water passing through the drum screen is introduced into the oxygen-free contact oxidation tank An anoxic tank for denitrifying the internal nitrate nitrogen returned from and an organic matter in PHB {po ly-β-hydroxybutyrate [(C ₄ H ₆ O ₂ ) n]; Polyhydric acid butyrate} and the contact oxidation tank is installed in the anaerobic tank, the treated water flows through the anaerobic tank and the fixed phase contact medium is installed in the aerobic conditions to remove residual organic matter, nitrification and over-intake reaction of phosphorus The wastewater and sewage treatment apparatus includes an immersion type membrane separation tank in which treated water passing through the contact oxidation tank is introduced, and residual organic matter decomposition and solid-liquid separation are performed.

Another feature of the present invention is organic and nitrogen using the above device. A wastewater treatment method for removing phosphorus, comprising: an anoxic process for denitrifying nitrate nitrogen conveyed internally in a catalytic oxidation process in an anoxic state and flowing raw water through a drum screen; and an organic matter in an anaerobic state that has undergone the anoxic process. PHB {po ly-β-hydroxybutyrate [(C ₄ H ₆ O ₂ ) n]; Multi hydroxide butyrate} , the anaerobic process in which the phosphorus release reaction proceeds, and the treated water flows through the anaerobic process, and the fixed phase contact medium is installed to remove the residual organic matter in the aerobic condition and the nitric oxidation and phosphorus process intake reaction proceeds. The phosphorus removal process is performed by discarding the oxidizing process and the microorganisms in which phosphorus is excessively ingested in the catalytic oxidation process, and includes a submerged membrane separation process in which treated water that has undergone the catalytic oxidation process is introduced and residual organic matter and solid-liquid separation proceed. Characterized in that.

1 is a flow chart of wastewater treatment according to the present invention.

Figure 2 is a water flow prevention inclined plate according to the present invention.

<Explanation of symbols for the main parts of the drawings>

10: screen tank 20: flow rate adjustment tank

30: anaerobic tank 40: anaerobic tank

50: contact oxidation tank 60: membrane separation tank

70: treatment tank 80: sludge storage tank

90: washing tank 100: BLOWER

21: drum screen 25: feed water pump

35, 45: stirring device 51: contact medium

52: water flow prevention inclined plate 55: internal conveying and excess sludge discharge pump

61: hollow fiber membrane 65: suction pump

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

First, the configuration of the present invention will be described with reference to FIG. 1, a screen tank 10 for removing particles having large particles introduced with wastewater and sewage;

A flow rate adjustment tank 20 for adjusting the flow rate of the inflow water through the screen tank 10;

A flow adjusting pump 25 for transferring the wastewater and sewage of the flow adjusting tank 20 to the anoxic tank 30;

A drum screen 21 for removing fine suspended matter in the influent water having passed through the flow adjusting tank 20;

An anoxic tank 30 for denitrifying nitrogen nitrate returned from the contact oxidation tank 50 using the treated water introduced in the flow rate adjusting tank 20;

Anaerobic tank 40 and the treated water flows into the anaerobic tank 30 and dephosphorization reaction occurs;

Agitators 35 and 45 for stirring the anoxic tank 30 and the anaerobic tank 40;

A contact oxidation tank 50 provided with a rope-type fixed bed contact medium 51 for oxidizing organic matter and ammonia nitrogen introduced from the anaerobic tank 40 using microorganisms;

A conveying pump 55 for internal conveying from the contact oxidation tank 50 to an anoxic tank 30 and discharging sludge to the sludge storage tank 80;

A membrane separation tank 60 through which the supernatant after the first solid-liquid separation flows from the water flow preventing gradient plate 52 of the contact oxidation tank 50 and reprocesses through the hollow fiber membrane;

A suction pump 65 through which the first treated water is passed through the immersion hollow fiber membrane 61 in the membrane separation tank 60 to solid-liquid and discharge the final treated water into the treated water tank;

A treatment tank 70 for storing and discharging the treated water sucked in the membrane separation tank 60;

A sludge storage tank 80 for storing excess sludge generated in the membrane separation tank 60;

A cleaning tank 90 for cleaning the separation membrane of the membrane separation tank 60;

And a blower 100 for supplying air to the flow rate adjusting tank 20, the contact oxidation tank 50, the membrane separation tank 60 and the sludge storage tank 80.

The present invention constituted as described above removes large suspended solids that are introduced with the wastewater and sewage from the screen tank 10, and then transfers the wastewater to the anaerobic tank 30, wherein the wastewater flowing out of the screen tank 10 In order to control the volume, the fine-floating material in the wastewater is removed by the drum screen 21 in the flow adjusting tank 20, and the wastewater and sewage are transferred to the anoxic tank 30 by the adjusting pump 25.

The anoxic tank 30 serves to denitrify the nitrogenous nitrate returned from the contact oxidation tank by using the treated water introduced from the flow adjusting tank 20, and the denitrified sewage from the anoxic tank 30 is transferred to the anaerobic tank 40 to cause dephosphorization reaction. At this time, by stirring the wastewater using the agitator in the anaerobic tank and anaerobic tank to prevent the deposition of microorganisms and to speed up the reaction.

Afterwards, the organic matter and ammonia nitrogen transferred from the anaerobic tank are oxidized and purified by the microorganisms in the fixed bed contact medium 55 in the form of rope in the contact oxidation tank 50, and a part of the sewage precipitated in the lower part of the contact oxidation tank 30 by the return pump 55 It is conveyed to an oxygen-free tank 30, and the water flow prevention inclined plate 52 in the contact oxidation tank 50 is installed to prevent the mixing of the roller paper by aeration and induce gravity settling of the sludge so that the upper supernatant is transferred to the membrane separation tank 60, and the sludge settled. Is transported to the inner conveying and sludge storage tanks. The treated water firstly treated in the contact oxidation tank 50 is subjected to reprocessing and immersion hollow fiber membranes in a membrane separation tank 60 for final liquid-liquid separation. Escherichia coli is filtered, and the treated water filtered in the separator is transferred to the treated water tank 70 by the suction pump 65.

In the treatment tank 70, the treated water sucked in the membrane separation tank 60 is stored and discharged, and the sludge deposited in the sludge storage tank 80 is appropriately consigned to a waste disposal company.

In the above process, the blower 100 continuously operates to supply air to the flow adjusting tank 20, the contact oxidation tank 50, the membrane separation tank 60, and the sludge storage tank 80 to aerated wastewater and maximize contact with microorganisms and food. It plays a role in improving the purification efficiency.

As described above, according to the wastewater and sewage treatment and treatment method using anaerobic tank, anoxic tank and fixed bed contact medium and immersion hollow fiber membrane according to the present invention, it is possible to efficiently remove organic matter, nitrogen and phosphorus, as well as to retain By reducing the time and greatly reducing the size of the reactor, the initial facility cost can be greatly reduced, and since there is no chemical use, the operation maintenance cost can be minimized.

In addition, the final solid-liquid separation is performed using the buffering function of the contact media installed in the contact oxidation tank and the hollow fiber membrane, so that stable water quality can be secured at all times even when there is a sudden change in raw water quality. Prevents premature clogging of membranes by the effects of sludge and sludge, which can prolong membrane replacement and cleaning cycles, resulting in lower maintenance costs.

In addition, since the pore size of the membrane is smaller than the size of E. coli, a separate disinfection facility for E. coli killing is not required.

Claims (7)

In the wastewater and sewage treatment apparatus for removing organic matter and nitrogen, phosphorus, An oxygen-free tank for introducing raw water passing through the drum screen and denitrifying the nitrate nitrogen returned from the contact oxidation tank in an oxygen-free state; The organic material was converted to PHB {po ly-β-hydroxybutyrate [(C ₄ H ₆ O ₂ ) n] in the anaerobic state of the treated water flowing in the anoxic tank ; An anaerobic tank, which is stored in the form of polyhydroxybutyrate} and undergoes a phosphorus release reaction; A contact oxidation tank for introducing the treated water that has undergone the anaerobic tank and having a fixed bed contact medium for removing residual organic matter, nitrifying and overingestion of phosphorus under aerobic conditions, and installing a slant plate to prevent sludge; Wastewater and sewage treatment apparatus comprising an immersion type membrane separation tank in which the final solid-liquid separation is introduced by the supernatant of the sludge settled in the water flow prevention inclined plate of the contact oxidation tank. The method according to claim 1, Wastewater and sewage treatment apparatus comprising a conveying device for conveying the nitrate nitrogen generated in the contact oxidation tank to an anoxic tank and a device for transporting the waste sludge to the sludge storage tank. The method according to claim 1, Sewage treatment and sewage treatment apparatus installed in the end of the contact oxidation tank to prevent the flow of water by abandoning the slant plate to induce sludge natural sedimentation and to send the supernatant to the next reactor. The method according to claim 1, Wastewater and sewage treatment apparatus, characterized in that the blower for supplying air to the flow rate adjustment tank, contact oxidation tank, membrane separation tank, sludge storage tank is additionally installed. delete delete delete