KR100405268B1 - The contactive filter for purification of the polluted water and waste water - Google Patents

Abstract

The present invention relates to a contact medium for filthy and wastewater purification, and more specifically, it is composed of 2 to 37% by weight of chitosan, 5 to 40% by weight of bioceramic, 3 to 38% by weight of activated carbon, and 55 to 90% by weight of naphthalene. Each powder is mixed and pressed at a pressure of about 1 kg / cm 2 to produce a ball shape, and 0.5 to about 1000 kg / hour of primary treated water flowing into the disinfection tank in a wastewater treatment facility by contact oxidation method. In the amount of 2% by weight to remove the residual amount of BOD and SS at the same time it was able to have excellent effects of disinfection, deodorization and sterilization.

Description

Contact filter for purification of the polluted water and waste water

The present invention relates to a contact medium for filthy and effluent purification, which enables a clarification treatment of filthy water that has been primarily treated using contact oxidation for filthy and effluent introduced into a disinfection tank of a septic tank. More specifically, chitosan 2 -37% by weight, bioceramic 5-40% by weight, activated carbon 3-38% by weight and naphthalene 55-90% by weight, each powder is mixed and pressed to a pressure of about 1kg / ㎠ to make a ball shape In the wastewater treatment facility by contact oxidation method, 0.5 ~ 2% by weight of the primary treated water flowing into the disinfection tank is removed in the amount of 0.5 to 2% by weight to remove the residual amount of BOD and SS. The present invention relates to a contact medium for wastewater purification which has an effect of deodorization and sterilization.

In general, the sewage treatment method using microorganisms is roughly classified into activated sludge method and catalytic oxidation method. The activated sludge method is a method of floating growth of microorganisms, but the catalytic oxidation method differs only in that microorganisms are attached to and propagated by media.

In particular, the catalytic oxidation method is performed by a treatment process as shown in FIG. 1, and is one of the treatment methods developed for the purpose of enhancing the treatment and reducing the cost, and forming a microbial film on the surface of the media to contact the wastewater. It is a method that removes contaminants in waste water through biological oxidation and physical filtration by repeating, and because the concentration of microorganisms in the reaction vessel is proportional to the specific surface area of the media, the concentration of microorganisms can be kept high, so it can be processed under high load. At the same time, the oxidation reaction and the filtration action occur at the same time, so that it is possible to obtain clean treated water with less suspended matter, as well as easy maintenance and low maintenance cost.

In addition, activated sludge method has been widely used because it has excellent treatment efficiency, is suitable for high concentration wastewater treatment, and can adjust MLSS, but there is excessive sludge generation, maintenance is difficult, requires professional skills and complex facilities. Since the catalytic oxidation method and the activated sludge method have one piece, it is possible to obtain a desirable effect if it is properly selected and used according to the surrounding environment.

However, when the wastewater is treated using catalytic oxidation and activated sludge, high concentrations of suspended microorganisms in the effluent and high particulate content can cause sediment formation. BOD and SS due to the remaining organic matters tend to be high, and there is a problem that the odor of the treated water is not completely removed, and the first treated water is disinfected in the disinfection tank and discharged.

In case of disinfection in the sterilization tank, in general, inorganic chemicals, especially highly volatile chemicals (eg, naphthalene) are used to volatilize during discharge. The microorganism itself not only serves as another pollutant, but also has a disadvantage of poor efficiency because it does not perform other functions.

Accordingly, an object of the present invention is to remove the residual amount of BOD and SS in the wastewater treatment method using microorganisms and at the same time, microorganisms sterilized by disinfection in a disinfection tank do not act as another contaminant, disinfection and deodorization and sterilization. It is to provide a contact medium for wastewater purification to have the effect of.

It is another object of the present invention to provide a method for easily manufacturing a contact medium for purifying wastewater and wastewater for the above purpose.

Still another object of the present invention is to provide a method for purifying wastewater by using contact media for purifying wastewater of the above purpose.

In order to achieve the above object as well as another easily expressed object in the present invention is composed of 2 to 37% by weight of chitosan, 5 to 40% by weight of bioceramic, 3 to 38% by weight of activated carbon and 55 to 90% by weight of naphthalene , Each powder is mixed and pressed to a pressure of about 1㎏ / ㎠ to produce a ball shape, 0.5 to 1000kg / hour of the primary treatment water flowing into the disinfection tank in the wastewater treatment facility by the contact oxidation method In the amount of ~ 2% by weight to remove the residual amount of BOD and SS at the same time it was possible to have excellent effects of disinfection, deodorization and sterilization.

1 is a schematic treatment flow diagram of a sewage purification plant to which the contact media of the present invention is applied;

2 is a graph showing the results of analyzing the contact media of the present invention with an X-ray fluorescence spectrometer.

* Explanation of symbols for the main parts of the drawings

1. Screen bath 2. Spare channel

3. Flow Adjustment Tank 4. Flow Adjustment Tank

5. The first contact aeration tank 6. The second contact aeration tank

7. Sedimentation tank 8. Defoaming tank

9. Disinfection tank 10. Discharge tank

11. Sludge Concentration Storage Tank

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

The wastewater purification contact medium according to the present invention comprises 2 to 37% by weight of chitosan, 5 to 40% by weight of bioceramic, 3 to 38% by weight of activated carbon, and 55 to 90% by weight of naphthalene. It is characterized in that it is manufactured in a ball shape by pressing at a pressure of about kg / ㎠.

In addition, the wastewater purification method according to the present invention is 2 to 37% by weight of chitosan and 5 to 40% by weight of bioceramic to 1000 kg / hour of primary treatment water flowing into the disinfection tank in the wastewater treatment facility by the catalytic oxidation method. %, Activated carbon 3 to 38% by weight and naphthalene 55 to 90% by weight, 0.5 to 2 of the contact medium for filthy and wastewater purification, prepared in a ball shape by mixing the respective powders and pressing them at a pressure of about 1 kg / cm 2. It is characterized in that the amount is added in the amount of weight and operating the sterilization tank.

Chitosan is a polymer polysaccharide which is extracted from crustaceans (crabs, crayfish, shrimp, squid bones) and the like, and is composed of 3,000 to 5,000 sugars called N-acetylglucosamine and glucosamine. It is added to exhibit heavy metal removal effect and adsorption effect.

Although the mechanism of antibacterial action by chitosan is not known precisely, when chitosan is present with organic acid, amino group shows cation, so cation of amino group of chitosan binds to carboxyl group (anion) in protein of bacterial body surface. It is estimated that the growth of the bacteria is inhibited by stacking and the bacteria cannot be divided and absorb the nutrients.

In addition, since chitosan has a positive (+) ion called the amino group (NH ₂ ⁺ ), it is combined with heavy metals and toxic substances (heavy metals or toxic substances have negative (-) ions) and remains or is not treated in the primary treatment water. Heavy metals and poisons are removed.

In particular, chitosan has one amino group and two hydroxyl groups per glucosamine, thus exhibiting its effect as a chelate ion exchange resin for heavy metals, and having a high affinity for transition metals, and in some cases crosslinking chitosan or graphene. By using T-copolymer chitosan, the efficiency of wastewater treatment can be improved.

In other words, by introducing sulfur compounds into chitosan beads (prepared by dropping chitosan solution into alkaline solution), chitosan beads having a large surface area that can adsorb metals even in acidic solutions can be improved in selective adsorption to heavy or precious metals. In addition, chitosan beads graft-copolymerized with alkenedioic acid, such as maleic acid, fumaric acid, and itaconic acid, may further improve metal ion removal ability. .

In addition, chitosan easily combines with heavy metals of high molecular weight and adsorbs large molecules, thereby increasing the efficiency of wastewater treatment.

Chitosan, in particular chitosan beads, the smaller the bead size, the better the metal removal efficiency, the slower the flow rate of wastewater, the metal removal efficiency is increased, in the present invention it was effective to use 2 to 37% by weight.

If the amount of chitosan used is less than 2% by weight, there is a disadvantage in that the addition effect is weak, and if it exceeds 37% by weight, there is a problem in that it is not economical due to the weak addition synergy effect, and because chitosan itself is expensive, it has an optimal effect. The ratio that can be expressed can be determined through repeated experiments.

Bio ceramics are materials such as oxides, nitrides and carbides that use inorganic materials. Generally, bio ceramics have much higher corrosion resistance, heat resistance, and abrasion resistance than metal materials and organic materials. It has various functions such as function, mechanical function, optical function, biological function, etc. In the present invention, antibacterial action, photooxidative decomposition of various harmful substances such as environmental hormones, continuous bacteria and mold sterilization and odor removal action, adsorption of volatile substances and It is added for the role of decomposition, activation of water due to far-infrared radiation, heavy metal removal and adsorption, descaling in the sterilization tank, the above action has already been found in the bio-ceramic, but the contact media added to the disinfection tank as in the present invention It was hardly used as a component, and the use amount was 5 to 40 weight% effectively.

When the amount of the bio-ceramic is less than 5% by weight, the effect of addition is weak, and when it exceeds 40% by weight, there is a problem in that it is not economical because the addition synergy is weak.

Activated carbon is a material that is made of carbon (carbide such as wood, coconut shell, lignite, bituminous coal) so that the micropores are well developed by high activation, and has a large internal surface area connected to the path of countless microspaces developed during the activation process. Used for various purposes such as decolorization, deodorization, removal of solvent recovery harmful gas, and the present invention exhibits effects such as filtration, decolorization, deodorization of remaining organic matter.

It is preferable to use 3 to 38% by weight of activated carbon, and when the amount of activated carbon is less than 3% by weight, the remaining organic material is filtered, the BOD and SS removal efficiency of the first treated water is decreased, decolorization, and deodorizing effect are achieved. There is a weak disadvantage, if the excess exceeds 38% activated carbon tends to be desorbed, the durability of the effect due to the use of activated carbon is reduced, there is a problem such that the activated carbon itself acts as a pollution source.

Naphthalene is an aromatic hydrocarbon having a molecular formula C ₁₀ H ₈ , a colorless volatile crystal having a molecular weight of 128, a melting point of 80.3 ° C, a boiling point of 217.97 ° C, and a specific gravity of 0.975 (25 ° C), and are easily sublimed even at room temperature.

Naphthalene is commonly used for disinfection of treated water firstly treated in a disinfection tank. However, since naphthalene is volatilized by long-term use, naphthalene is frequently added, but only the effect of disinfection is expressed. Disinfection, as well as compression with other ingredients can improve the durability.

The use amount of naphthalene is preferably 55 to 90% by weight, and when the amount is less than 55% by weight, the initial disinfecting effect is lowered. When the amount is more than 90% by weight, the effect expressed by other components is reduced. At the same time, there is a problem that naphthalene is easily sublimed or decomposed by organic substances contained in wastewater and wastewater, thereby significantly reducing durability.

The powder of the above-described components, in particular chitosan, is mixed using a bead form and pressed at a pressure of about 1 kg / cm 2 to produce the contact media for the wastewater purification of the present invention in a ball shape.

The pressure at the time of compression is not particularly limited, and the pressure of the contact medium for filthy and wastewater purification of the present invention produced by pressing at a pressure of about 1 kg / cm 2 is excellent, and the effect expressed in the contact medium is also excellent. It can be compressed to various pressures according to the type of wastewater, wastewater, and properties to obtain products with different strengths.

In addition, the contact media for the waste water purification of the present invention can be manufactured in a variety of shapes as well as the ball shape, which can be easily inferred by those skilled in the art.

As a result of analyzing the contact media for filthy water and wastewater purification of the present invention using an X-ray fluorescence analyzer, as shown in FIG. 2, Ca, K, Fe, Si, S, Sr, Ti, Cl, etc. are composed of various components. And it was found.

The contact media for filthy and wastewater purification of the present invention prepared as described above is added in an amount of 0.5 to 2% by weight relative to 1000 kg / hour of primary treated water flowing into the disinfection tank in the filthy and effluent treatment facility by the catalytic oxidation method. It is used.

If the amount is less than 0.5% by weight relative to the 1000kg / hour of the first treatment water flowing into the disinfection tank, the treatment efficiency is significantly lowered, and when the amount exceeds 2% by weight, the synergistic effect of the addition is weak and not economical.

The following examples illustrate the invention in more detail, but do not limit the scope of the invention.

Example 1

Chitosan bead was added dropwise to alkaline solution (5% NaOH), 5% by weight of chitosan beads, 2% by weight of bioceramic powder (Daesung Ceramic Institute, trade name (SUPER CERAMIC BALL)), 7% by weight of activated carbon powder, 60% concentration 70 wt% of naphthalene powder was mixed and pressed at a pressure of about 1 kg / cm 2 to prepare a contact medium for filthy wastewater purification according to the present invention in a ball shape.

Subsequently, in the amount of 1% by weight based on 1000 kg / hour of primary treatment water flowing into the disinfection tank, the wastewater purification contact filter was purified.

As a comparative example, the wastewater was purified using only naphthalene (lovestar Co., Ltd.) and the test results were compared. When the contact media for wastewater purification of the present invention were used, BOD, SS, heavy metal content, volatile substances It was found that the effect and the like is significantly lowered.

As described above, the present invention comprises 2 to 37% by weight of chitosan, 5 to 40% by weight of bioceramic, 3 to 38% by weight of activated carbon, and 55 to 90% by weight of naphthalene. It is manufactured in the shape of a ball by pressing at a pressure of 0, and the residual amount of BOD is added in the amount of 0.5 to 2% by weight based on 1000 kg / hour of primary treatment water flowing into the disinfection tank in the wastewater treatment facility by contact oxidation method. And while removing the SS was able to excellent effect of disinfection, deodorization and sterilization.

Claims (3)

It consists of 2 to 37% by weight of chitosan, 5 to 40% by weight of bioceramic, 3 to 38% by weight of activated carbon, and 55 to 90% by weight of naphthalene. Each powder is mixed and compressed into a ball shape at a pressure of 1 kg / cm 2. Contact media for filthy and wastewater purification, characterized in that manufactured. According to claim 1, Chitosan is a contact medium for wastewater purification, characterized in that the bead prepared by dropping the chitosan solution to the alkaline solution. The contact medium for purifying wastewater and wastewater according to claim 1 or 2, in an amount of 0.5 to 2% by weight relative to 1000 kg / hour of primary treated water flowing into the disinfection tank in the wastewater treatment facility by the catalytic oxidation method. Wastewater purification method characterized in that it is put into use.