KR20030091576A - Coated Surface Compositions of hanging Bio-contactor made of mine Tailings for Sewage and Wastewater Teratment and its coating method - Google Patents

Abstract

PURPOSE: A coating composition for HBC (hanging bio-contactor) using mine tailings is provided, which help to improve attachment of microorganism to HBC and to prevent sloughing-off of biofilm due to overgrowth of microorganism, thereby efficiently remove nitrogen and phosphorus in wastewater. CONSTITUTION: The composition is consisted of 5 to 25 wt.% of ceramic powder, 5 to 15 wt.% of low quality natural zeolite, 5 to 30 wt.% of low quality kaoline, 40 to 80 wt.% of organic binder and additives. The method comprises the steps of (a) mixing 5 to 25 wt.% of ceramic powder, 5 to 15 wt.% of low quality natural zeolite, 5 to 30 wt.% of low quality kaoline, 40 to 80 wt.% of organic binder and additives, (b) coating the mixture of the step (a) onto an HBC, and (c) hardening the mixture at a temperature range of 130 to 140 deg.C for 2 to 4 min when the organic binder is silicone.

Description

Coated Surface Compositions of hanging Bio-contactor made of mine Tailings for Sewage and Wastewater Teratment and its coating method}

The present invention relates to a surface treatment composition of a fixed-phase contact material for sewage and wastewater treatment using unutilized minerals, and more particularly, to a microorganism for treating various sewage and wastewater, and to easily grow and grow microorganisms. The surface treatment composition of the fixed-phase contact material for sewage and wastewater treatment using the unutilized mineral which can provide the nutritional source of this invention, and its processing method.

In general, when treating sewage and wastewater, a method of growing and treating microorganisms is widely used all over the world, and the method can be roughly classified into an activated sludge method and a catalytic oxidation method.

The activated sludge method is a method suitable for large-scale treatment of sewage, which usually contains a large amount of organic matter, which is a method of treating microorganisms by flowing them into the sewage, so that the microorganisms are highly spilled, a large-capacity treatment tank is required, and according to the aeration operation. Not only does it cost a lot of operating costs, but there is a drawback of excessive sludge generation.

In addition, the catalytic oxidation method is also called a biofilm method, which can be divided into microorganisms flowing in the sewage and microorganisms attached to the contact material, and the contact material has various forms and materials.

The contact oxidation method has a low maintenance cost and easy management, and because there are many microorganisms attached to the contact material, there is an advantage in that the capacity of the treatment tank is reduced and the amount of sludge generated is reduced, but the purchase and installation cost of the contact material is excessively required. There is a disadvantage.

In addition, until now, organic and inorganic materials have been used as materials for the contact oxidation method, and it has been the main point in the manufacturing process to secure the surface to which microorganisms can attach and grow to the maximum.

In addition, the inorganic material used as the contact material is not easy to significantly increase the surface area, but there is an advantage that can provide a nutrient source of microorganisms, the organic material in contrast has the opposite advantages and disadvantages.

In addition, the organic material used as the contact material may be a plastic bed, which is molded into a cube or a sphere, and is operated in a fluidized bed. The manufacturing cost and installation cost are relatively low, but the surface area is limited, so that the amount of microorganisms is attached. Less waste water treatment efficiency is bad.

On the other hand, the stationary phase is mainly used by processing a variety of fiber filament is mainly used, the surface area is large, the amount of microorganisms attached to the large process efficiency is excellent, while the manufacturing cost is high, there is no nutrient source of microorganisms and microorganisms If excessively attached, the supply of air and water will be insufficient, and the inner surface will be anaerobic, and the microorganisms will be detached and the treatment efficiency will be lowered.

Such fixed-phase microbial contact materials are classified into plate-shaped and rope-shaped according to their shape, and the rope-type is used in many fields because the manufacturing process is complicated but the surface area is large.

An object of the present invention for improving this, while ensuring a sufficient area to which microorganisms can be attached, the microorganisms grow only to a suitable thickness so that the microbial membrane is not detached, and the amount of reserves can be provided while providing a nutrient source required by the microorganisms. In addition, the present invention provides a surface treatment composition and a method of treating the fixed-phase contact material to make use of domestic minerals that are unused due to low quality.

In addition, an object of the present invention, the surface of the fixed-phase contact material for sewage and wastewater treatment using an unused mineral that can prevent secondary contamination by the coating film using a binder and environmentally friendly inorganic material that is strong in adhesion, insoluble in water It is to provide a treatment composition and a treatment method thereof.

In order to achieve the above objects, a composition comprising 5 to 25% by weight of environmentally friendly ceramic powder, 5 to 15% by weight of lower natural zeolite, 5 to 30% by weight of lower kaolin and 40 to 80% by weight of organic binder and other additives There is provided a surface treatment composition of a fixed-phase contact material for sewage and wastewater treatment using an unused mineral made up.

The present invention also comprises the steps of grinding and mixing environmentally friendly ceramic powder, natural zeolite, kaolin, organic binder and other additives;

Surface-treating the mixture on a fixed bed rope contact;

Provided are a method for surface treatment of a fixed-phase contact material for sewage and wastewater treatment using an unutilized mineral having a composition including curing the surface-treated composition.

Hereinafter, embodiments of the present invention will be described.

The present invention performs surface treatment of a fixed bed contact material in the form of a rope with a microorganism-friendly coating film whose main component is an inorganic material in order to provide the advantages of both organic and inorganic materials.

The surface treatment composition for the stationary contact material of the present invention comprises 40 to 80% by weight of an organic binder, 5 to 25% by weight of environmentally friendly ceramic powder, 5 to 15% by weight of lower natural zeolite, and 5 to 30% by weight of lower kaolin. When the color of the coating film is adjusted, an appropriate amount of coloring pigment is added.

The organic binder is a material that serves to attach various ceramic powders and coloring pigments to the surface of the stationary phase contact material and serves as a carrier, and has excellent adhesion strength and should not be dissolved in water.

As such organic binders, silicone resins used for coating oil-based urethane resins and fabrics are used. If the amount is less than 40% by weight, the coking force is insufficient. If more than 80% by weight is added, the amount of other compositions is reduced. It brings about the deterioration of characteristics according to the whole composition.

In addition, as the environmentally friendly ceramic powder, general clay, clay and loess were used. This refers to a ceramic powder which is commonly encountered around living environment and is microorganism friendly, and should be pulverized and refined to about several μm. If added by less than the weight percent does not appear the addition effect and when added more than 25% by weight lack of caking force appears.

In addition, the lower natural zeolite refers to a material having a lot of fine pores and having ion exchange ability, which is an environmentally friendly material and a low quality, and does not show an additive effect when added to less than 5% by weight. In case of adding more than 15% by weight, the lack of strength of the coating film appears.

In addition, the lower kaolin refers to a material that is mainly composed of silicon oxide and aluminum oxide, which is also environmentally friendly and of low quality, and the addition amount of kaolin does not show an effect when added to less than 5% by weight. When added by weight% or more, a lack of adhesion strength of the coating film occurs.

In addition, in order to control the color of the coating film according to the composition, a certain color of organic pigments and inorganic pigments may be added to the composition. It can also be used by adding.

On the other hand, the ground eco-friendly ceramic powder, natural zeolite, kaolin, organic binder and other additives are mixed.

The composition is composed of 40 to 80% by weight of an organic binder, 5 to 25% by weight of environmentally friendly ceramic powder, 5 to 15% by weight of the lower natural zeolite and 5 to 30% by weight of lower kaolin, and the composition is ground to several micrometers. A refined thing is used and various additives may be mixed here according to a use.

The mixture is coated on a stationary rope contact.

In the above-mentioned rope-type fixed-phase microbial contact material, polyvinylidene chloride filament becomes the center line of the core material, winding 900 and 1200 denier polypropylene connections and 800 denier polyester connections to the core material, and Pulled outward in a radial direction to form a loop, the whole ring has a diameter of 40 to 45 mm, a porosity of about 95.7%, an apparent density of about 0.03 g / cm 3, and a specific surface area of about 2450 m 2 / m 3 have.

The mixture is then coated with a nozzle using an airless pump to be sprayed onto a fixed bed rope contact material or to be surface treated by dipping.

Subsequently, the mixture coated on the fixed-phase rope-type contact material as described above is cured.

Curing the composition coated in the above, when the urethane resin is adopted at room temperature, and in the case of silicone coating for fabric coating, and dried for 2 to 4 minutes at 130 ~ 140 ℃.

At this time, if it is 130 or less, the curing time increases, and if it is 140 or more, it is difficult to dry the curing acid, but if the drying time is 2 minutes or less, incomplete drying occurs, and if it is 4 minutes or more, waste of unnecessary heat is generated.

The above-mentioned liquid components and powdery substances are thoroughly mixed to complete the preparation of the surface treatment composition, and then immersed using a nozzle using an airless pump, sprayed onto a fixed-phase rope contact material, or immersed in a tank filled with a mixture. The coating film is dried and cured to complete the surface treatment.

In addition, the concentration of the composition is adjusted or applied several times so that the thickness of the dried coating film becomes 100 to 500 µm.

When explaining the embodiment of the present invention in more detail as follows.

<Example 1>

A surface treatment composition was prepared by mixing and grinding 60% by weight of an oil-based urethane resin, 20% by weight of general clay powder, 10% by weight of lower natural zeolite, and 10% by weight of lower kaolin with a stirrer. The rope-like fixed phase contact material was immersed in this surface treatment composition to form a dried coating film having a thickness of about 260 μm.

<Example 2>

A carrier was prepared in the same manner as in Example 1 except for using the oil-based silicone resin in which the curing catalyst was added instead of the urethane resin in Example 1, and the thickness of the dried coating film was about 200 μm.

Comparative Example

A rope-type stationary contact material without surface treatment was adopted.

Then, the fixed-phase contact material manufactured according to the three examples is installed in a continuous aeration tank having a capacity of about 50 l under the same conditions so as to be about 45% of the total wastewater volume, and the BOD, SS, The treatment efficiency of TN and TP and the desorption of attached microorganisms were observed and the results are shown in <Table 1>.

[Table 1] Sewage treatment results of three types of stationary contact materials

(Unit: ppm)

division BOD SS T-N T-P Time required for tally Influent 96.6 61.0 7.9 1.2 Runoff Example 1 8.4 7.0 2.1 0.2 Not detached Example 2 7.8 8.6 1.8 0.3 Not detached Comparative example 12.6 8.2 2.9 0.6 About 45 days

According to Table 1, it can be seen that when the surface treatment is performed on the stationary phase contact material, the treatment efficiency of BOD, SS, T-N, and T-P is almost superior to that of the non-coating film treatment.

In addition, the microorganisms attached to the contact material is not easily detached, it can be seen that it is attached for a longer time.

As described above, according to the present invention, it is possible to secure sufficient area to which microorganisms can be attached, to grow microorganisms only to a suitable thickness, to prevent detachment of microbial membranes, and to use low-grade domestic minerals while providing nutrients required by microorganisms. .

In addition, by using a strong adhesive force and insoluble in water and environmentally friendly inorganic substances there is an effect to prevent secondary contamination by the coating film.

While the invention has been shown and described with respect to specific embodiments thereof, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit or scope of the invention as provided by the following claims. I would like to clarify that those who have knowledge of this can easily know.

Claims (10)

Sewage and wastewater treatment using unused minerals consisting of 5 to 25% by weight of ceramic powder, 5 to 15% by weight of lower natural zeolite, 5 to 30% by weight of lower kaolin, 40 to 80% by weight of organic binder and other additives Surface treatment composition of the stationary phase contact material. The method of claim 1, The ceramic powder, the surface treatment composition of the fixed-phase contact material for sewage and wastewater treatment using an unused mineral, characterized in that any one selected from the group of environmentally friendly ceramic powder consisting of ordinary clay, clay and loess. The method of claim 1, The organic binder, the surface treatment composition of the fixed-phase contact material for sewage and wastewater treatment using an unused mineral, characterized in that any one selected from the group of a water-resistant resin consisting of an oil-based urethane resin, a silicone resin for textile coating. The surface treatment composition of claim 1, wherein the additive is a color pigment, a dispersant, an antisettling agent, or the like. Mixing 5-25 wt% of the ground ceramic powder, 5-15 wt% of the lower natural zeolite, 5-30 wt% of the lower kaolin, 40-80 wt% of the organic binder, and other additives; Coating the mixture on a fixed bed rope contact; Surface treatment method of the fixed-phase contact material for sewage and wastewater treatment using an unused mineral made as a step of curing the mixture coated on the contact material. The method of claim 5, The step of coating the mixture on the fixed bed rope contact material, the surface treatment of the fixed bed contact material for sewage and wastewater treatment using unutilized minerals, characterized in that the surface treatment by spraying the fixed bed rope contact material by a nozzle using an airless pump. Way. The method of claim 5, The step of coating the mixture on the fixed bed rope contact material, the surface treatment method of the fixed bed contact material for sewage and wastewater treatment using an unused mineral, characterized in that the surface treatment by immersing the fixed bed rope contact material in a container filled with the mixture. . The method of claim 5, The step of curing the mixture coated on the contact material, the surface treatment method of the fixed-phase contact material for sewage and wastewater treatment using an unused mineral, characterized in that when the urethane resin is used as the organic binder added to the mixture at room temperature. The method of claim 5, The step of curing the mixture coated on the contact material, using an unused mineral, characterized in that the organic curing agent to be put into the mixture when the silicone resin for fabric coating is used for 2 to 4 minutes dry curing at 130 ~ 140 ℃ Surface treatment method of fixed phase contact material for wastewater treatment. The method of claim 5, The coating of the mixture on the fixed-phase rope-type contact material, the polyvinyl chloride denden filament becomes the centerline of the core material, and wound 900 and 1200 denier polypropylene connection and 800 denier polyester connection to the core material, The wire is pulled outward in the radial direction to form a loop. The diameter of the entire ring is 40 to 45 mm, the porosity is about 95.7%, the apparent density is about 0.03 g / cm 3, and the specific surface area is about 2450 m 2 / m 3. The surface treatment method of the fixed-phase contact material for sewage and wastewater treatment using the unutilized mineral which characterized by the rope-type contact material provided.