KR200189472Y1 - Carrier for processing waste water - Google Patents

Abstract

The present invention relates to a fluid carrier for the treatment of wastewater generated in living and industrial activities, and improves the disadvantages of the carrier for immobilizing existing microorganisms. The purpose is to develop a suitable carrier for obtaining high treatment efficiency in wastewater treatment system due to its excellent ability.

In particular, the carrier has been designed to be suitable for the complete purification and treatment of hardly degradable organic contaminants, including nitrogen and phosphorus in wastewater, and easy to fix the active microorganisms and to simplify the installation, and has a high economic efficiency.

Therefore, when the carrier of the present invention is utilized in the existing wastewater treatment system, it is economical because it has a high efficiency treatment capacity at a low cost, and has a higher efficiency treatment capacity and a stable treatment capacity than a facility using a conventional carrier. It can make a very high contribution to the preservation of the water quality of the river, and consequently contribute to raising the human happiness index by preserving a pleasant and clear natural environment.

Description

Carrier for wastewater treatment

The present invention is designed to oxidize and decompose contaminants such as BOD and COD of manure and domestic wastewater generated in industrial wastewater and general households and restaurants that accompany industrial activities. The present invention relates to a carrier that can be used for maximizing treatment efficiency. In particular, a high concentration of organic substance contained in waste water in an aerobic digester by high concentration of active microorganisms is fixed and cultured by immobilizing microorganisms (active sludge) in a fluidized bed carrier. It is an object of the present invention to provide a carrier having high removal efficiency and stable treatment ability for removing decomposable organic contaminants including nitrogen and phosphorus.

The present invention relates to a catalytic oxidant, or carrier, used in systems for industrial wastewater and domestic wastewater treatment, and more particularly, to a fluid carrier according to the present invention.

Carriers used in conventional wastewater treatment facilities have been developed and marketed in various kinds of carriers, but generally used carriers are plastics considering fixed surface type and specific surface area in which microorganisms adhere to fibers with a large specific surface area. And the like are used.

Such carriers do not exhibit excellent purifying ability due to structural defects in terms of management difficulties in terms of mass transfer and maintenance. When looking at the defects of the existing carrier, the cause is first, it is difficult to fix the microorganism, second, it is easy to detach by the physical force by the shear stress, third, the problem that the excess microorganism is immobilized on the carrier to block the pores, the fourth load variation It has a weak problem in responding to.

In order to overcome the above problems and to achieve the purpose of devising to treat the waste water with a stable excellent treatment efficiency, the conditions for providing a carrier of excellent function are shown in Table 1.

Therefore, we have developed a carrier that can keep high concentration of immobilized microorganisms in high activity, which is a method to effectively remove pollutants including organic substances from wastewater and wastewater, and can be easily applied to biotechnological wastewater treatment facilities. And it is an object of the present invention to develop a carrier showing the treatment efficiency.

The present invention exhibits a very excellent function in the treatment of sewage and wastewater, and is effective in the use of granular inorganic substances including activated carbon. A fluidized bed carrier suitable for a fully mixed aerobic bioreactor was developed by filling granular inorganic materials including activated carbon and foamed plastics including polyurethane cut to a suitable size.

The base materials of the carrier used here are particulate inorganic materials and polyurethanes, with activated carbon in the inorganic materials and polyurethanes in the foamed plastics being used in the largest proportion. Activated carbon and polyurethane are materials that have a large number of pores, and these micropores have a structure that is very easy to fix microorganisms capable of purifying wastewater, and is difficult to detach the immobilized microorganisms.

The carrier according to the present invention is a carrier having a structure in which a porous trapping body of an inorganic filler including activated carbon and foamed plastics such as polyurethane is trapped, so that when the microorganism is immobilized on activated carbon and foamed plastics, Since it is surrounded by a trapping material such as plastic and less detachment due to physical shear stress or biological impact, it has the advantage that can show a high treatment capacity in the actual waste water treatment system.

In addition, the carrier has the function of controlling the proportion of the material to be filled according to the properties of the waste water to be treated. More specifically, in the case of zeolite in the inorganic particulate packing material, the inorganic material having good ion exchange adsorption of ammonia nitrogen, and the carrier when treating wastewater with high nitrogen content is ammonia-free in the treatment system when the filling amount of zeolite is increased. Excellent performance can be exhibited in the treatment of nitrogen.

In addition, it is possible to freely control the specific gravity of the carrier by filling the granular activated carbon and foaming plastics in an appropriate ratio. For fluidized carriers the specific gravity should be within 1 ± 0.5.

Activated carbon and particulate fillers are generally heavy, with specific gravity of about 1.2 to 1.6. Therefore, in the aerobic flow tank, it is possible to control the specific gravity of the final carrier by adjusting the filling amount of the expandable plastics in order to enable the flow of a fully mixed state, thereby giving a function that can be flowed well in the waste water.

1 is a carrier model according to the present invention

2 is a carrier porous capture model according to the present invention

3 is a schematic diagram of a waste water treatment aeration tank using a carrier according to the present invention

<Description of the code | symbol about the principal part of drawing>

DESCRIPTION OF SYMBOLS 1 Flowable carrier 2 Plastic porous body 3 Granular packing material 4 Foamable plastics packing material

The structure of the present invention is to completely purify the pollutants of the waste water by completely adsorbing, decomposition, and biological treatment of contaminants such as organic substances in the reactor of the completely mixed form using a fluid carrier as shown in FIG. A carrier with characteristics is provided.

The carrier 1 in the configuration of the fluidized bed carrier is filled with a porous circular plastic 2, a particulate inorganic filler 3 and a foamed plastic filler 4, and more particularly, a porous circular plastic 2 In order to facilitate oxygen and mass transfer to the outside, the mixture is filled with a particulate inorganic material such as activated carbon, zeolite, and polyurethane filling material (4), which are easily immobilized by microorganisms in a plastic prototype having a porous shape as shown in FIG. 2. Carrier. The physical and chemical properties of the carrier 1 are shown in Table 2.

In addition, the schematic diagram of the bioreactor using such a carrier is configured in the form having the process of [Fig. 3] and the organic matter of the waste water is applied to the microorganisms immobilized on the fluidized bed carrier (1). It is digested and ingested and purified completely.

In order to consider the performance of the present invention, an actual carrier as shown in FIG. 1 was manufactured and installed in a septic tank at a quantity of 4 / l, and experiments were performed to treat restaurant wastewater by a catalytic oxidation method. At this time, the treatment conditions were maintained for 24 hours and the test period was June, 1999. It was tested for about 3 months until August 30, 1999. Continuous test results are shown in Table 3. At this time, the analysis of influent and effluent was conducted once daily, and the analysis method was analyzed according to the standard method.

Test results As shown in the test results table in Table 3, very high concentrations of pollutants such as BOD and 660mg / L were found, while pollutant concentrations included inferior degradability such as excessive detergents. Although the removal efficiency of BOD was 97%, COD 97%, SS 94%, and TKN 88%, the removal efficiency was excellent. In particular, the nitrogen removal rate was very good as 88%.

In addition, in order to investigate the carrier characteristics of the present invention for livestock wastewater, two types of carriers, type A and type B, having physicochemical properties shown in Table 4, were prepared and tested.

The experiment was conducted to treat livestock wastewater in a pilot tester equipped with an aeration tank. The injection amount of the carrier was 3 / l, the treatment condition was maintained for 96 hours in the hydraulic retention time of the aeration tank in which the invention was put, the average BOD volume load was 0.5kgBOD / m ³ · day conditions. The trial period is April 1, 1999. The test was conducted for about 5 months until August 30, 1999. Continuous test results are shown in Table 7. At this time, the inflow and outflow were analyzed once daily, and the analysis method was analyzed according to the standard method.

As shown in the test results table in Table 5, pig wastewater in livestock wastewater contains biodegradable materials, which contains hardly decomposable substances and high concentrations of ammonia nitrogen. The BOD removal efficiency of the reactor used was 96%, COD 90%, TKN 76%, Form B showed 96% BOD, COD 89%, TKN 87%. In particular, in the case of the B-type carrier, the removal ability of BOD and COD was less than that of the A-type, but the removal efficiency of nitrogen showed a very good removal ability such that the B-type carrier increased about 11% than the A-type.

The fluid carrier used in the fluidized bed according to the present invention maintains a high active microbial concentration exhibiting an effective purification ability in a wastewater treatment facility, and thus the treatment plant using the same increases the treatment efficiency, thereby reducing the cost of wastewater treatment. In addition, it is used for the catalytic oxidation process of septic tank, which contributes to the increase of treatment efficiency, and it is very easy to apply to the existing wastewater treatment plant, and it is possible to process the high quality of water without the need for installation cost. Provide a significant contribution.

Claims (2)

In a carrier used for wastewater treatment, a particulate inorganic material (3), a foamable plastic material (4), and the like, as a filling material in which active microorganisms are immobilized in a spherical porous trapping body 2 capable of trapping particulate matter. Carrier composed of filling material The carrier 1 has a circular shape, and the carrier 1 has a size of 30 to 100 mm, and the porous trapping material 2 is made of a plastic resin such as polyethylene or polypropylene. As a particulate inorganic material, activated carbon, zeolite, celite, ash, bentonite, tarc, cray, kaolin, pearlite A foamable plastic material such as (Perlite) is a carrier composed of polyurethane, polyethylene, polypropylene, polystyrene, foamed resin, rubber, and the like.