KR100428416B1 - Sewage high quality treatment method using ceramic filter and 3 step filtration - Google Patents

Abstract

The present invention relates to a method for treating sewage altitude by ceramic media and three stage filtration, wherein BOD is removed by aerobic microorganisms attached to the media by performing downflow filtration and aeration filtration while introducing sewage into the lower water layer in one stage filtration media. In addition, the first stage filtration step of nitrifying the ammonia nitrogen by nitrification bacteria, the first stage filtration and the inflow of a part of the sewage, while the filtered water flows in the first stage filtration to perform the upflow filtration and anoxic filtration Two-stage filtration step to remove nitrogen by denitrification reaction by denitrification bacteria growing on the filter media, and downflow filtration and aeration filtration while introducing the treated water filtered from the two-stage filter paper to the three-stage filter paper And a three stage filtration step to remove BOD and SS removal by microorganisms and remove SS and E. coli by sand filtration. The sewage advanced treatment method using the ceramic filter and three stage filtration has the effect of simultaneously removing the BOD, SS, nitrogen, phosphorus and E. coli contained in the sewage as the advanced treatment method by the ceramic filter and the three stage filtration. .

Description

Sewage High Quality Treatment Method by Ceramic Media and Three-Stage Filtration {SEWAGE HIGH QUALITY TREATMENT METHOD USING CERAMIC FILTER AND 3 STEP FILTRATION}

The present invention relates to a method for treating sewage altitude by ceramic media and three-stage filtration, in particular one-stage filtration for aeration and downflow filtration, two-stage filtration for anoxic filtration and upflow filtration, and aeration and downflow. The present invention relates to a ceramic filter medium capable of simultaneously removing BOD, SS, nitrogen, phosphorus and Escherichia coli contained in sewage by three-stage filtration through filtration, and a sewage advanced treatment method by three-stage filtration.

Until now, many patents and utility model registrations related to sewage treatment methods have been reported, but many of them consist of anaerobic tanks, aerobic tanks and sedimentation tanks. These methods are aimed at reducing BOD and SS. I can't.

In addition, the suspension microbial contact aeration septic tank and the highly efficient combined-purification tank which promote microbial activity can undergo nitrification, but denitrification is not anaerobic condition. It is difficult to remove enough by ingestion.

In addition, the conventional method is not suitable as a sewage treatment system due to the lack of a system configuration capable of effectively propagating microorganisms necessary for nitrogen and phosphorus removal and complicated maintenance.

Therefore, nitrogen and phosphorus, which have not been sufficiently removed as a conventional technique, are discharged as it is, resulting in an increase in nitrates and phosphates in rivers, lakes and sea areas, eutrophicating and decaying water, causing odors of tap water, vegetation damage of fish and crops, etc. Water pollution is increasing.

The present invention has been made to solve the above problems and defects as described above, and includes one-stage filtration for aeration and downflow filtration, two-stage filtration for anoxic filtration and upflow filtration, and aeration and downflow. It is an object of the present invention to provide a ceramic filter media capable of simultaneously removing BOD, SS, nitrogen, phosphorus and E. coli contained in sewage by three-stage filtration, and a method for treating sewage altitude by three-stage filtration.

1 is a process for explaining the advanced sewage treatment method by the three-stage filtration of the ceramic media according to the present invention.

<Description of Symbols for Main Parts of Drawings>

10: 1 stage filter paper 11: upper water layer

12: middle ceramic media layer 13: aeration device

14: lower water layer 20: two-stage filter paper

21: upper aqueous layer 22: intermediate ceramic media layer

23: aeration device 24: lower water layer

30: 3-stage filter paper 31: upper water layer

32: middle upper ceramic filter layer 33: aeration device

34: middle lower sand layer 35: lower water layer

In order to achieve the above object, the method for treating sewage by ceramic filter and three stage filtration according to the present invention is aerobic microorganisms attached to the filter medium by performing downstream flow filtration and aeration filtration while introducing sewage into the lower water layer in one stage filter paper. To remove BOD and to nitrate the ammonia nitrogen by nitrifying bacteria, and to flow up part of the sewage from the first stage filter paper while introducing the treated water filtered from the first stage filter paper. And two-stage filtration step to remove nitrogen by denitrification by the denitrification bacteria growing on the filter media by anaerobic filtration, and downflow filtration and aeration filtration while introducing the treated water filtered in the two-stage filter paper to the three-stage filter paper. Three-stage filtration step to remove BOD and SS removal by microorganisms attached to the media and remove SS and E. coli by sand filtration It is configured to include.

In addition, 75 to 85% of the sewage introduced for the treatment is introduced into the upper water layer of the single stage filter paper, and 15 to 25% of the sewage is introduced into the lower water layer of the two stage filter paper to promote denitrification.

In addition, phosphorus is removed by Al ⁺⁺⁺ eluted from the ceramic filter medium of the above 1-3 filters.

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

1 is a process chart for explaining the advanced sewage treatment method of the ceramic filter medium and the three-stage filtration according to the present invention.

In Figure 1, 10, 20, 30 shows a single stage filter paper, two stage filter paper, three stage filter paper, respectively, the first stage filter paper 10 is the upper water layer 11, the middle ceramic filter layer 12, the lower An aqueous layer 14 is provided, and an aeration device 13 for aeration is provided between the intermediate ceramic media layer 12 and the lower aqueous layer 14.

The two-stage filter paper 20 is provided with an upper aqueous layer 21, an intermediate ceramic media layer 22, and a lower aqueous layer 24, and aeration for aeration between the intermediate ceramic media layer 22 and the lower aqueous layer 24. The device 23 is installed.

The three-stage filter paper 30 is provided with an upper aqueous layer 31, an upper middle ceramic filter layer 32, a middle lower sand layer 34, and a lower aqueous layer 35, and an intermediate lower sand layer 34 and a lower aqueous layer 35. Between the a) aeration device 33 for aeration is installed.

The sewage advanced treatment method using the ceramic filter and three stage filtration of the present invention is a one-stage filtration step, and performs downflow filtration and aeration filtration while introducing sewage into the lower water layer 11 in the one-stage filter paper 10 to attach to the filter medium. BOD is removed by growing aerobic microorganisms and nitrification of ammonia nitrogen by nitrifying bacteria.

Subsequently, as a two-stage filtration step, the treated water filtered in the first-stage filter paper 10 is introduced into the lower water layer 21 of the two-stage filter paper 20 and the upflow filtration and the anaerobic filtration while introducing a part of the sewage. Nitrogen is removed by denitrification by the denitrification bacteria growing on the media.

Subsequently, as a three-stage filtration step, the microorganisms adhered to the medium by performing downflow filtration and aeration filtration while introducing the treated water filtered by the two-stage filter paper 20 into the upper water layer 31 of the three-stage filter paper 30. The removal of BOD and SS by means of removal and removal of SS and Escherichia coli by means of sand filtration, followed by release to the next treatment step.

The middle lower sand layer 34 of the three-stage filter paper 30 is preferably formed to a thickness of 40cm or more so that the removal rate of E. coli is increased.

In this way, 75 to 85% of the sewage introduced into the upper water column of the single stage filter paper is put into the upper water layer of the first stage filter paper, and 15 to 25% of the sewage is introduced into the lower water layer of the second stage filter paper to promote denitrification. Done.

In addition, phosphorus is removed by the following reaction by Al ⁺⁺⁺ eluted from the ceramic filter medium of the 1 to 3 stage filter paper.

_{^{2Al +++ + 3PO 4 - = Al}} 2 (PO 4) 3 ↓

As described above, the advanced method of sewage treatment by ceramic filter and three-stage filtration can simultaneously remove BOD, SS, nitrogen, phosphorus and E. coli contained in the sewage as the advanced treatment of sewage by ceramic filter and three-stage filtration. It has an effect.

Claims (4)

In the first stage filter which is provided with the upper water layer, the intermediate ceramic layer and the lower water layer, and the aeration device between the middle ceramic layer and the lower water layer is provided, the downflow filtration and the aeration filtration are performed while introducing sewage into the lower water layer. A first stage filtration step of removing BOD by aerobic microorganisms attached to the filter medium and nitrifying ammonia nitrogen by nitrifying bacteria; The upper water layer, the middle ceramic filter layer, and the lower water layer are provided, and the treated water filtered from the first stage filter is introduced into the lower water layer of the two-stage filter paper having an aeration device for aeration between the intermediate ceramic filter layer and the lower water layer. A two-stage filtration step of removing nitrogen by denitrification by denitrification bacteria growing on the media by upflow filtration and anoxic filtration while introducing a portion of the sewage; The upper water layer, the upper middle ceramic filter layer, the middle lower sand layer, and the lower water layer are provided, and the upper water layer of the three-stage filter paper having the aeration device for aeration between the middle lower sand layer and the lower water layer is filtered from the second stage filter paper. Ceramics comprising a three-stage filtration step of removing BOD and SS by microorganisms attached to the media by performing downflow filtration and aeration filtration while introducing water, and removing SS and E. coli by sand filtration. Advanced sewage treatment by filter media and three stage filtration. According to claim 1, characterized in that 75 to 85% of the sewage introduced to the treatment to the upper water layer of the single stage filter paper, 15 to 25% to the lower water layer of the two stage filter paper to promote denitrification. Sewage treatment by ceramic filter and three stage filtration. The method of claim 1, wherein the middle lower sand layer of the three-stage filter paper is formed to have a thickness of 40 cm or more. The method of claim 2, wherein the phosphorus is removed by Al ⁺⁺⁺ eluted from the ceramic filter media of the 1 to 3 filter paper.