KR100861554B1 - Filtration and adsorption multistage wastewater processing unit that remove t-p of discharge waterway a sewage disposal - Google Patents

Abstract

A filtration/adsorption multistage wastewater treating apparatus for removing total phosphorous from effluent of a sewage disposal plant is provided to suppress eutrophication phenomena derived from phosphorous and use phosphorous efficiently by effectively applying the apparatus to the existing sewage disposal plant when improving an existing sewage disposal plant, and to remove and recover total phosphorous and dissolved phosphorous by using a phosphorous adsorption medium coupled to the filtration process in a main stream of effluent of the sewage disposal plant. In a wastewater treatment apparatus for treating effluent of a sewage disposal plant, a filtration/adsorption multistage wastewater treating apparatus for removing total phosphorous from effluent of the sewage disposal plant comprises: a flow control part(10) for controlling retention time according to flow rate, suspended solids, and total phosphorous of effluent flown in from a second settling pond; upflow pre-filtration equipment(20) including a synthetic resin filter media to which a predetermined flow rate of the effluent is supplied from the flow control part; filtration/adsorption equipment(30) having the effluent flown in a bottom part thereof from the pre-filtration equipment via bottom and top parts of the pre-filtration equipment; a blower(40) for desorbing material adsorbed onto the filter media using air and treated water when cleaning effluent of the pre-filtration equipment and the filtration/adsorption equipment; and a disinfection tank(50) for disinfecting pathogenic bacteria of the effluent after passing the effluent through the filtration/adsorption equipment.

Description

Filtration and adsorption multistage wastewater processing unit that remove T-P of discharge waterway a sewage disposal}

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an overall configuration diagram of a filtration / adsorption multi-stage wastewater treatment apparatus for removing total phosphorus from sewage treatment plant effluent according to the present invention.

2 is a view showing a pre-filtration unit portion and a filtration-adsorption unit portion of the filtration treatment device according to the present invention.

Fig. 3 is a synthetic resin filter medium of the pre-filtration unit portion, and (B) shows a phosphorus adsorption filter unit of the filtration / adsorption unit in the total phosphorus filtration / adsorption treatment apparatus according to the present invention.

4 is a view showing the results of testing the effect of extending the filtration duration of the pre-filtration unit portion of the filtration and adsorption treatment apparatus, which is a total of the sewage treatment plant discharged water according to the present invention.

Figure 5 is a view showing a phosphorus removal comparative test filtration treatment results of the phosphorus filtration adsorption medium of the suspended solids filtration device of the sewage treatment plant effluent according to the present invention.

Figure 6 is a view showing a result showing the total phosphorus removal results of the experimental apparatus for filtration treatment in the present invention.

* Description of the symbols for the main parts of the drawings *

10: flow rate control unit 20: pre-filtration unit

30: filtration and adsorption device unit 40: blower

50: disinfection grandfather

The present invention is a filtration and adsorption multi-stage wastewater treatment device for removing the total phosphorus in the sewage treatment plant effluent mixed with the filter medium to filter the adsorption of phosphorus at the same time by filling the filter medium in the filtration treatment device Total filtration and adsorption wastewater treatment composed of total filtration and adsorber by adsorbent Relates to a device.

In general, phosphorus (phosphate), which is the main cause of eutrophication and the limiting substance of algae growth, has been mainly biological treatment method or chemical treatment method using flocculant.

However, biological processes are difficult to operate, and it is not easy to ensure continuous and stable effluent quality.

Other chemical methods are relatively easy to operate, but suffer from chemical costs and sludge treatment issues.

Another electrolysis / aggregation phosphorus removal technology is one of the technologies that can take advantage of the chemical removal technology and solve the disadvantages of the chemical precipitation method or electrode corrosion. The shell is reused for exhaust gas removal, acid soil improver, heavy metal adsorption, and high concentration phosphorus removal. However, calcium carbonate, which occupies most of the oyster shell, has a large amount of sludge generation when applied to water treatment, and contains a large amount of organic and inorganic materials. Because of the problem, there is a problem of going through an appropriate firing process.

In addition, the crystallization dephosphorization method is one of the methods for removing phosphorus in sewage, which is one of the physical and chemical treatment methods that has shown good results, and it is possible to treat ordinary sewage secondary treated water. The dephosphorization performance differs depending on the set pH, calcium concentration, water temperature, interference in raw water, contact time, and the performance of the contact material. Also, since the target of removal is soluble phosphoric acid, other forms of phosphorus (polyphosphoric acid, organic phosphoric acid, suspending phosphorus) ) Should be removed by secondary functions such as filtration. The coarse dephosphorization method adjusts pH by adding magnesium to sewage, and recovers phosphorus as a crystal of magnesium ammonia phosphate (MAP), but there is a problem in that it is not suitable for treating effluent.

In particular, the biological removal process of anaerobic and aerobic masses, which are widely used, is converted to polyphosphoric acid, which is a phosphorous material of microorganisms. When organic matter such as volatile fatty acid must be supplied, nitrogen is low when organic matter such as domestic sewage is low. In reality, it is difficult to improve to a simultaneous biophosphorus and nitrogen process because it competes with the organic needs of removal.

In addition, existing physical and chemical treatment devices suffer from overuse of chemicals and sludge disposal.

An object of the present invention, which was devised to solve the above-mentioned problems, is to sum up the sewage treatment plant effluent which can be effectively applied in the improvement of the existing treatment plant for the efficient use of phosphorus as a depleted resource with the suppression of eutrophication originating from phosphorus. The present invention provides a filtration and adsorption multi-stage wastewater treatment system for removing water.

Accordingly, the present invention relates to a method and apparatus for removing and recovering total phosphorus and dissolved phosphorus by using a phosphorus adsorption medium combined with a filtration process in the main stream of the effluent for improving sewage water quality. Filtration and adsorption multi-stage wastewater treatment equipment for removing total phosphorus from sewage treatment plant effluent.

Filtration and adsorption multi-stage wastewater treatment apparatus for removing the total phosphorus in the sewage treatment plant effluent according to the present invention for achieving the above object,

A flow rate adjusting unit for adjusting the residence time according to the suspended substances and turbidity of the raw water discharged from the secondary sedimentation basin;

An upflow pre-filter unit composed of a synthetic filter to which a certain amount of flow is supplied by the flow control unit;

The effluent flowing into the pre-filter unit is introduced into the lower end portion, the filtration and adsorption unit portion flowing through the lower end and the upper end of the pre-filter unit;

A blower for desorbing the substance adsorbed to the filter medium by using air and treated water when washing the discharge water of the pre-filter unit and the filtration / adsorption unit;

The effluent is a sterilization tank for disinfecting pathogens of the effluent after passing through the third treatment passing through the filtration and adsorption unit, the filtration and adsorption multi-stage wastewater treatment apparatus for removing the total phosphorus in the sewage treatment plant effluent. to provide.

As described above, the filtration and adsorption multi-stage wastewater treatment apparatus for removing total phosphorus in sewage treatment plant effluent is a phosphorus filtration and adsorption apparatus for treating sewage treatment plant effluent. Filtering suspended solids and colloidal materials by using synthetic media in the device section to reduce the solids load of the filtration in the adsorption section of the rear stage to improve efficiency and maintenance, remove total phosphorus, and remove fine solids and dissolved in filtration and adsorption. It is characterized in that it is configured to remove and retrieve the adult.

And, in the sewage treatment plant effluent treatment using the pre-filter unit composed of synthetic filter according to the present invention, the pre-filter unit by filtering the effluent introduced into the upstream (pass from the bottom to the top) to remove the suspended matter and turbidity It is characterized by minimizing the power and cost required for backwashing by removing the total phosphorus in the suspended solids and colloidal materials and at the same time reducing the solids load of the rear filtration and adsorption apparatus to increase the filtration duration.

In addition, in the filtration wastewater treatment apparatus using the pre-filtration unit according to the present invention, in order to control the clogging occurring during operation, the filtration apparatus is to inject air and treated water by the blower at the lower end of the filtration device to clean the filter medium It is characterized by.

In addition, the filtration and adsorption apparatus of the filtration wastewater treatment apparatus according to the present invention is characterized in that the fine suspended matter is filtered to remove total phosphorus, and the dissolved phosphorus is recovered by ion exchange using a phosphorus adsorbent as a medium. .

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in more detail.

Prior to this, terms or words used in the present specification and claims should not be construed as being limited to the common or dictionary meanings, and the inventors should properly explain the concept of terms in order to best explain their own invention. Based on the principle that can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention.

Therefore, the embodiments described in the specification and the drawings shown in the drawings are only one of the most preferred embodiments of the present invention, and do not represent all of the technical idea of the present invention, they can be replaced at the time of the present application It should be understood that there may be various equivalents and variations.

1 is an overall configuration diagram of a filtration and adsorption multi-stage wastewater treatment apparatus for removing the total phosphorus of sewage treatment plant effluent according to the present invention, Figure 2 is a pre-filtration unit and a filtration and adsorption unit of the filtration treatment apparatus according to the present invention Drawing.

As shown, the filtration treatment device according to the present invention, the discharged water is discharged from the secondary sedimentation basin flows into the flow rate control unit 10 to adjust the residence time according to the flow rate of the discharged water, suspended matter and total phosphorus.

Here, the secondary sedimentation reservoir is treated in a water treatment facility, such as a water purification plant or a sewage treatment plant, for a predetermined time to flow or to flow at a low flow rate to precipitate solid contaminants generated during the treatment process. The place where it takes place is called sedimentation basin, and the flowable mixture of solid contaminants is called sludge or sludge.

At this time, it is divided into primary sedimentation basin and secondary sedimentation basin according to the solid contaminants to be treated. The primary sedimentation basin plays a role of pretreatment for primary treatment and biological treatment, and the secondary sedimentation sludge is generated by biological treatment. To separate the treated water from

Such, discharged from the secondary settling basin is controlled by the flow rate control unit 10, and then a certain amount of flow rate flows into the upflow pre-filter unit 20 in the flow rate control unit 10.

The pre-filtration unit 20 is composed of a synthetic resin medium.

At this time, the synthetic filter medium in the pre-filtration unit 20 is to filter the suspended solids and colloid material using a polyurethane-based material.

In addition, the effluent flowing into the pre-filter unit 20 is introduced into the lower end to pass through the lower end and the upper end of the pre-filter unit 20.

Next, the discharged water passing through the pre-filtration unit 20 flows into the filtration / adsorption unit 30.

At this time, the effluent flowing into the upstream from the pre-filtration unit 20 is discharged again into the filtration and adsorption unit 30 in the upstream.

The filtration / adsorption unit 30 is used in the filtration / adsorption unit 30 by filtering fine suspended matter to remove total phosphorus and recovering dissolved phosphorus by ion exchange using a phosphorus adsorbent as a medium. As the adsorbent, the adsorbent is a particulate zirconium-based adsorbent with a diameter of about 0.7 mm.

At this time, when the effluent is washed by the pre-filter unit 20, the material adsorbed to the filter medium is desorbed by the blower using air and treated water.

In this way, the discharged water passes through the third treatment passing through the filtration and adsorption device unit 30, and then moves to the disinfection tank unit 50 to disinfect the pathogen of the discharged water.

The discharged water from the sewage treatment plant is treated through a multistage tank.

That is, the discharged water is discharged from the secondary sedimentation basin and flows into the flow rate control unit 10, and is supplied to the pre-filtration unit 20 composed of synthetic resin media at a suitable flow rate in the system. When the residence time is to be adjusted according to the flow rate of the discharged water, suspended matter and total phosphorus flow rate control unit 10 is required. The pre-filter unit 20 is an upward flow type, and the inflow water flows into the lower end portion, passes through the lower end and the upper end portion of the pre-filter unit 20, and then flows into the filtration / adsorption unit unit 30.

Here, as a phosphorus filtration and adsorption apparatus for treating the effluent from the sewage treatment plant, the filter medium is composed of two stages in the interior of the apparatus, and the pre-filter unit 20 at the front end is filtered by a polyurethane-based synthetic resin filter and filtered at the rear stage. The adsorption device unit 30 is driven in an upflow using a particulate phosphorus adsorbent of about 0.7 mm.

In addition, when used as a third treatment in the sewage treatment plant is introduced into the disinfection tank 50, the pathogens, such as E. coli is sterilized.

Through such a filtration treatment device, the suspended matter filtration of the effluent can be performed.

Fig. 3 is a synthetic resin filter medium of the pre-filtration unit portion, and (B) shows a phosphorus adsorption filter unit of the filtration / adsorption unit portion of the total phosphorus filtration / adsorption treatment apparatus according to the present invention.

As shown, the pre-filtration unit 20 is a filtration device filled with environmentally suitable fibrous resin or a piece of sponge-like resin carved.

When the pre-filter unit 20 is cleaned, the blower 40 is operated to remove the clogging phenomenon by desorbing the substances adsorbed onto the filter medium using air and treated water.

In addition, as shown in FIG. 4, the present invention shows the filtration duration time when the filtration / adsorption unit 30 is used directly and when the pre-filtration unit 20 is used. Occlusion occurs within time, but the pre-filtration method in the pre-filtration unit 20 shows that the filtration is sustainable for 5 to 10 days without occlusion.

Therefore, by using the pre-filter unit 20, the filtration duration is longer than the use of the sorbent filter alone, less loss due to the blockage of the filter device, it is easy to recover the function by backwashing.

In the filtration processing apparatus according to the present invention, the filtration / adsorption unit unit 30 is a device in which filtration and adsorption of fine flotation and phosphorus are adsorbed and recovered on an adsorption medium are filled with media suitable for adsorption and recovery of phosphorus.

5 is a view showing a result of the phosphate removal comparative test filtration treatment of the phosphorus filtration adsorption medium of the phosphate filtration / adsorption unit portion treatment apparatus of the total effluent of the sewage treatment plant effluent according to the present invention.

In order to select and evaluate the filter medium in the filtration / adsorption unit section 30, after the reaction through the isothermal adsorption experiment on the existing adsorbent and the ion exchange resin, the residual concentration was analyzed by measuring the same concentration by the filtration adsorption apparatus. As a result, the phosphorus removal function was compared and tested on the hytalcite-based adsorbent (LDH), the zirconium-based adsorbent (Zirconium oxide and Zirconium ferrite), the styrene-based strong base anion exchange resin and the flocculant used as the comparative adsorbent. Phosphorus adsorption media such as hytalcite and zirconium-based adsorbents performed significantly better than conventional media.

In addition, Figure 6 is a view showing a result showing the total phosphorus removal results of the experimental apparatus for filtration treatment in the present invention.

As shown in the drawing, as a result of the pilot-scale experiment installed in the sewage treatment plant, the apparatus removes large solids by using a synthetic resin filter in the pre-filter unit 20 of the front end as shown in FIG. It consists of two stages which arrange | position the filtration and adsorption | suction apparatus part 30 which adsorb | sucks to the rear stage.

The media used in this field test were polyurethane-based materials for shearing, and the phosphorus adsorbent used was a particulate zirconium-based adsorbent with a diameter of about 0.7 mm. The treated material was discharged from sewage treatment plant, and suspended solids (SS) were introduced in 10 ~ 200 mg / L depending on the sedimentation basin. The influent concentration of total phosphorus (T-P) was introduced at 0.5-5 mg / L. Treated water was less than 5 mg / L for normal influent and less than 10 mg / L for high influent. In all cases, the total phosphorus was less than 1 mg / L, and especially the dissolved phosphorus was less than 0.1 mg / L. Figure 5 shows that even though there is a fluctuation of the incoming phosphorus, it is quite stable to remove the phosphorus.

As described above, the present invention relates to a method and apparatus for removing and recovering total phosphorus and dissolved phosphorus using a phosphorus adsorption medium combined with a filtration process in the main stream of the effluent for improving sewage water quality. Filtration and adsorption wastewater treatment equipment.

As described above, specific preferred embodiments of the present invention have been described, but the present invention is not limited to the above-described embodiments, and various modifications by those skilled in the art to which the present invention pertains are described below. It should be said that they fall within the claims of the present invention as claimed.

As described above, the filtration and adsorption treatment which is the total of the effluent from the sewage treatment plant according to the present invention. The device uses two stages of filtration to remove total phosphorus and dissolved phosphorus contained in suspended solids through filtration and adsorption. Removal has the effect of minimizing the phosphorus concentration in the outflow.

It can be used as a post-treatment phosphorus removal system in sewage and wastewater treatment equipment to reduce carbon source consumption in anaerobic process of biological treatment process for phosphorus removal.

Therefore, the nitrogen removal rate of the whole processing apparatus system rises by the utilization improvement in the denitrification process of the bioprocess of a carbon source. Standards on the concentration of suspended solids (SS) in secondary sedimentation tanks or separation processes have been strengthened in the use of effluents, replacing solid-state filtration devices that are essential in recent years. SS) removes phosphorus and contributes to the improvement of phosphorus removal rate.

Compared to the biological phosphorus removal (anaerobic, anoxic, aerobic) method, the present invention can be operated with an extremely long solid residence time, thereby greatly reducing the amount of sludge produced and easily obtaining a high nitric acid concentration. Reflecting the global trend of increasing importance for phosphorus as a depleted resource, the drug used in this study (adsorbent) has higher phosphorus recovery capacity as well as efficient removal of phosphorus from sewage compared to the existing ones. The effects of the resource cycle can be expected.

The filtration treatment device can be used as a sewage water or tertiary treatment facility in retrofitting projects of new and existing sewage treatment plants, and the filtration treatment device can be applied to a facility where it is possible to comply with the enhanced discharge water quality standards by supplementing some facilities. It is a very useful invention because it can be effective.

Claims (5)

In the wastewater treatment apparatus for treating the sewage treatment plant effluent, A flow rate control unit 10 for controlling the residence time according to the flow rate of the discharged water discharged from the secondary sedimentation basin, the floating material and the total phosphorus; An upstream pre-filter unit 20 composed of a synthetic resin filter medium having a certain amount of flow rate supplied from the flow rate adjusting unit 10; The effluent flowing into the pre-filter unit 20 is introduced into the lower end portion, and the filtration / adsorption unit 30 is introduced through the lower end and the upper end of the pre-filter unit 20; A blower 40 for desorbing the adsorbed material to the media by using air and treated water when washing the discharge water of the pre-filter unit 20 and the filtration / adsorption unit 30; Filtration to remove the total phosphorus of sewage treatment plant effluent, characterized in that consisting of; disinfection tank unit 50 for disinfecting pathogens of the effluent after passing through the third treatment passing through the filtration and adsorption device unit 30 Adsorption multi-stage wastewater treatment device. The method of claim 1, wherein the pre-filtration unit 20 includes the removal of the solid phosphorus by using a fibrous resin carved out of the fibrous resin, sponge-like resin and to improve the backwash cycle by prolonging the filtration duration of the filter medium layer Filtration and adsorption multi-stage wastewater treatment apparatus for removing the total phosphorus of effluent in the sewage treatment plant. The method of claim 1, wherein the filtration and adsorption device unit 30 includes a filtration device filled with a hytalcite-based zirconium-based adsorbent to remove fines and adsorb and recover dissolved phosphorous. A filtration and adsorption multistage wastewater treatment apparatus for removing total phosphorus from discharged water from a sewage treatment plant. 2. The pre-filtration unit 20 and the filtration / adsorption unit 30 repeat the inflow and discharge in the upstream to filter and adsorb the sewage, wastewater and effluent to remove suspended solids and dissolved phosphorus. Filtration and adsorption multi-stage wastewater treatment apparatus for removing the total phosphorus in the sewage treatment plant effluent. The air and the treated water are injected by the blower 40 at the lower end of the filtration device in order to control the clogging caused during operation of the pre-filter unit 20 and the filtration / adsorption unit 30. And a filtration / adsorption multistage wastewater treatment apparatus for removing total phosphorus from the sewage treatment plant effluent.

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