KR950002547B1 - Biological contact-material for waste water treatment - Google Patents

Abstract

The preparation method for contacting materials from wasted vinyls consists of (1) mixing wasted vinyls from vinyl houses with stone powder, activated charcoal, filtering sands in the ratio of 1:0.07-1.0 and grinding, (2) melting the mixture at 200-250'C for 4-6 min for 3 times, (3) extruding the melts to C-shaped pipes (I) at 200 atm/m2 to be expanded to 130%. on inside and outer side of (I), crude surface areas give microorganisms more contacting.

Description

Microbial contact media for sewage, wastewater and sewage treatment and its manufacturing method

1 is a perspective view of a microbial contact medium according to an embodiment of the present invention.

2 is a longitudinal sectional front view of FIG.

3 is a cross-sectional side view of FIG.

4 is an exemplary view when stacked in a lattice form.

5 is a schematic diagram of metabolism in an aerobic biofilm.

* Explanation of symbols for main parts of the drawings

1: Contact medium 2: Inside

3: surface 4: uneven surface

The present invention relates to wastewater, microbial contact media for sewage treatment, and a method of manufacturing the same, mainly containing waste synthetic resins such as waste vinyl, and containing stone powder, activated carbon, and filtered sand. The present invention relates to a microorganism contact medium for sewage and wastewater and sewage treatment, and a method of manufacturing the same, which can maximize the efficiency of purification of wastewater and sewage by vigorous adsorption of aerobic microorganisms.

In aerobic biofilms, organic matter in wastewater, sewage, nitrogen, phosphorus, etc. are ingested by microorganisms present in the biofilm. The biofilm is a dense aggregate of microorganisms and is not dispersed like activated sludge. Therefore, in terms of one microbial cell, contact between wastewater and wastewater is insufficient.

In order to compensate for these treatment disadvantages, by forming and attaching a media to the biofilm method to increase the surface area of the biofilm, there is an attempt to improve stable treatment efficiency by making contact with the waste water sufficiently.

A media having this purpose of use must have at least the following requirements to be effective. For example, the surface area should be large, the porosity is high, the adsorption of the biofilm should be good, there should be no clogging due to sludge, and there should be no corrosion, deformation, or deterioration caused by sewage and wastewater, sewage. There must be no movement or biofilm drop due to water flow, and the condition to meet demand at low price.

The present invention is to provide a microorganism contact medium for wastewater and sewage treatment that can satisfy the above-mentioned conditions sufficiently, such as waste vinyl that spilled out numerous times when dismantling the plastic house and suffered a lot of trouble in its disposal. It is an object of the present invention to provide inexpensive wastewater and wastewater contacting microorganisms for the treatment of sewage, activated carbon, and filtered sand for strengthening strength, increasing porosity and adsorbing aerobic microorganisms.

That is, the present invention is mainly made of high and low density polyethylene waste resin film from the plastic house, and finely divided into fine raw material, activated carbon, and filter sand as a raw material, and then melted several times, about 30% of the actual value. The main feature is to produce a C-shaped cross-section media having at least a portion of the main surface of which has a concave-convex concave-convex surface on the inner surface and a surface thereof by extruding by using an extrusion die having a small diameter.

As for the mixing ratio of a main material and a member, 1: 0.07-0.1 is preferable. If the mixing ratio of the member is less than 7%, the porosity is less than the specified value, and the adsorption of aerobic microorganisms is less than expected. On the contrary, if the mixing ratio of the member is more than 10%, the moldability is bad and the compressed material is brittle and brittle or brittle. .

The waste synthetic resin, which is the main subject, is naturally dried, shakes off the dirt on it, and cuts it into an appropriate size so that it can be added to the melter. The cut material is mixed with the members, and then poured into the first, second, and third melts, and dissolved. The melting temperature in each step is 200-250 ° C and the time required is 4-6 minutes.

In the first stage melting process, the main purpose is to burn about half of the impurities mixed in the main / member and carbonize them.The second stage melting process completely burns the remaining impurities and carbonizes. It is a process to make it better, and immediately after the third melting, it immediately leads to the extrusion process. The extrusion speed is ideally about 0.020-0.024 / second, and the inner and the surface irregularities are formed in the process of expanding into the air when extruding under high temperature and high pressure.

Impurities refer to carbonaceous materials such as wood chips in waste vinyl, and if they remain unincinerated, side effects such as poor extrusion, poor quality of the extrudate, and difficulty in working.

Stone powder is used to increase the stability by suppressing fluidity as much as possible, and activated carbon and filter sand are used to increase porosity and surface area, respectively.

The extrudate immediately after passing through the die expands by about 130% than the cross-sectional area of the die hole. In this process, the inner surface 2 and the surface 3 of the contact medium 1 change into irregular irregularities 4. The irregular irregular surface 4 has a larger area per unit area than a smooth surface or a regular continuous wave surface, and is a rough surface, which is more advantageous for creating an environment in which microorganisms in wastewater, sewage, and sewage are easily adsorbed and propagated. Become.

The extrusion die has a C-type extrusion hole. Therefore, a part of the cross-sectional circumferential surface of the extrudate has a shaped pole and a C-shaped cross section along the longitudinal direction. When the microorganism contact material is installed by lattice stacking, the exploded part is easy to stack the top contact medium on top of the bottom contact medium, and the lamination state is also stable, and both ends and bottoms in the longitudinal direction are opened, so that the inner and outer sides of the contact medium are open. The flow and contact with the flowing water are smooth and the adsorption of microorganisms is much higher.

The pressure at the time of extrusion is 200 Ton / cm <2>, it is forced cooling by cooling water after extrusion, and the cooled extrudate is cut | disconnected to predetermined length.

The microbial contact medium of the present invention thus completed has the following advantages.

Ⓐ High microbial diversity with regard to purification

Ⓑ Organize diverse and stable ecosystems.

Ⓒ Strong response to load fluctuations in water quality.

Ⓓ Less sludge generated.

Ⓔ The growth of nitride bacteria and denitrification bacteria is large.

Ⓕ The fluctuation of quantity and water quality is strong.

Ⓖ High removal rate of organics at low water temperature

Ⓗ Solid liquid separation is good.

High and low concentrations are possible.

부족 If the capacity of existing facility is insufficient, the capacity can be increased 2-3 times without facility expansion.

◦ Slude bulking does not occur.

Ⓛ Advanced treatment (third treatment) also has a remarkable treatment efficiency.

It is economical because it shows high efficiency even in a small area of the treatment plant.

In addition, the comparative advantage of the contact media obtained in the present invention and the conventional weed filter media is shown as follows.

Claims (2)

Subsidiary materials such as stone powder, activated carbon, and filtered sand are mixed and ground at a ratio of 1: 0.07-1.0 in dried, sorted and pulverized waste vinyl, and these are applied for 1, 2, and 3 times at 200-250 ° C for 4-6 minutes. The impurities are completely carbonized and melted through the extruder equipped with 0.7 type C die of the designed thickness dimension and extruded and cooled, and the surface C-shaped microbial contact medium is formed by the uneven surface. Wastewater, microbial contact medium for sewage treatment, characterized in that for producing a method for producing the same. Mainly made of pulverized waste vinyl, mixed with raw materials such as stone powder, activated carbon, and filtered sand at a ratio of 1: 0.07-1.0, and melted at 200-250 ° C. for 4-6 minutes for 1, 2, and 3 times. A microorganism contact medium for cross-section C wastewater and sewage treatment, in which the impurity is completely carbonized and the melt is extruded and cooled by an extruder equipped with a C-type die having a design thickness of about 0.7.