KR101349478B1 - Manufacturing process of activating carbon attached micro-organisms mixed for water quality purification - Google Patents

Abstract

The present invention relates to a method for manufacturing mixed microorganism attached active carbon for water purification, comprising the steps of: injecting wood materials in a chamber where the air is blocked then heating the chamber at 700-1300°C for 24-26 hours; manufacturing active carbon with enlarged air gaps by activating the carbonized wood materials; manufacturing an activating solution by using mixed microorganisms; attaching the mixed microorganisms on the active carbon by injecting the activating solution to the active carbon; cutting or crushing the active carbon attached with the mixed microorganisms into a fixed size; and packing the cut active carbon in a pack having air gaps whose size is not bigger than 1 mm. In the step of manufacturing the activating solution, a culture solution is made by mixing 1-10 wt% of mixed microorganism solid culture medium, 1-5 wt% of molasses or brown sugar, and 85-98 wt% of water. The activating solution is made by culturing the culture solution at 15-35°C for 3-7 days. A fixed amount of air is injected to the culture solution every 4-12 hours during the culturing step. The manufacturing method of active carbon can maximize the purification effect continuously in an economical and environment friendly way. [Reference numerals] (S10) Carbonizing step; (S20) Activated carbon manufacturing step; (S30) Activating solution manufacturing step; (S31) Blending step; (S32) Cultivating step; (S33) Air injecting step; (S40) Activating solution injecting step; (S41) Dilution step; (S42) Mixing step; (S50) Activated carbon cutting step; (S60) Packing step

Description

Manufacturing Process of Activating Carbon attached Micro-organisms Mixed for Water Quality Purification}

The present invention relates to a method for producing mixed microorganism-attached activated carbon for water purification, and in particular, by spraying on odors and highly polluted rivers, closed waters, cages, and areas of red tide occurrence, the harmful red microorganisms and toxic substances are adsorbed. The present invention relates to a method for preparing mixed microorganism-attached activated carbon for water purification, which can be removed and then precipitated, and organic matter precipitated at the bottom by the action of microorganisms can be continuously decomposed to promote the rate of self-cleaning.

Many techniques have been developed to improve water pollution in lakes, rivers and coasts. Physical methods of dredging contaminants deposited on the ground, planting aquatic plants such as reeds and water hyacinths, biological methods of spraying microorganisms that break down pollutants, and chemicals such as hydrogen peroxide for artificial oxidation. The method and the method using activated carbon are typical examples.

However, it is not easy to apply such technology because it requires a lot of money to apply it. For example, dredging is applied only to areas with severe pollution. After dredging, additional dredged soil should be treated. And dredged soil is considered designated waste per ton, which varies depending on the region, but varies from 200,000 to 400,000 won / ton. Is processed.

In addition, aquatic plants can be planted geographically, that is, only when the water depth is slow, the flow rate is slow, and the riverbed is relatively stable. There is a drawback that the purification effect appears only after a period of time.

In addition, the microbial spreading method of pure strain is also very different from the efficiency in the laboratory, it is impossible to say a reliable technology.

Drug spraying may affect other organisms in the water, so great care must be taken with their use.

Activated carbon is thermally decomposed by applying heat to a tree such as a palm tree under oxygen-limited conditions, and then chemically activated. Contaminants are adsorbed into the activated carbon through the increased surface area. When the volume inside the activated carbon is filled with the contaminants, no further adsorption occurs.

Patent Application No. 10-2000-0018043, Registration No. 10-0372405, Invention Name: Method for producing activated carbon adsorbed microorganisms and activated carbon produced thereby

The present invention has been made to solve the above-mentioned problems of the prior art, using a mixed microorganism with high environmental adaptability for water purification, and the mixed microorganism can be attached to activated carbon to continuously remove contaminants The purpose of the present invention is to provide a method for producing mixed microorganism-attached activated carbon for economical and eco-friendly water purification.

Method for producing a mixed microorganism-attached activated carbon for water purification according to the present invention for solving the above problems is to heat the chamber at 700 ~ 1300 ℃ temperature for 24 to 26 hours after the wood into the air-blocked chamber A carbonization step; An activated carbon manufacturing step of activating carbonized wood to make activated carbon with expanded pores; An active liquid preparation step of making an active liquid using mixed microorganisms; An active liquid injection step of injecting the active liquid into the activated carbon to attach mixed microorganisms to the activated carbon; Activated carbon cutting step of cutting or pulverizing activated carbon to which the mixed microorganism is attached to a predetermined size; Activated carbon packing step of packing the activated carbon cut into a predetermined size in a pack having a pore of 1mm or less; The active liquid preparation step is a mixed step of mixing the culture medium 1 ~ 10% by weight of the medium, molasses or brown sugar 1 ~ 5% by weight, water 85 ~ 98% by weight to form a culture solution; A culture step of culturing the culture solution at a temperature of 15 to 35 ° C. for 3 to 7 days to make an active solution; Consists of an air injection step of injecting a predetermined amount of air at intervals of 4 to 12 hours to the culture solution during the culture process.

Here, the active liquid injection step is a dilution step of diluting by mixing water in the active liquid prepared in the active liquid manufacturing step; It consists of a stirring step of rotating the incubator after injecting the activated liquid diluted with the activated carbon into the incubator.

The method for preparing mixed microorganism-attached activated carbon for water purification of the present invention configured as described above can be used in combination with the purifying power of activated carbon and the purifying power of mixed microorganisms when using activated carbon produced by this method. When applied to water deterioration areas and odor generating areas due to the pollutants of the, there is an advantage that can maximize the purification effect in an economical and environmentally friendly way.

In addition, there is an advantage that can be continuously purified by mixed microorganisms rather than temporary and one-time purification.

1 is a block diagram showing a method for producing a mixed microorganism attached activated carbon for water purification according to the present invention.
Figure 2 is a view showing the state when the activated carbon prepared by the method for producing a mixed microorganism attached activated carbon for water purification according to the present invention applied to the polluted river.

Hereinafter, with reference to the accompanying drawings an embodiment of a method for producing a mixed microorganism attached activated carbon for water purification according to the present invention will be described in detail.

1 is a block diagram showing a method for producing mixed microorganism-attached activated carbon for water purification according to the present invention, and FIG. 2 is an activated carbon prepared by the method for preparing mixed microorganism-attached activated carbon for water purification according to the present invention. The figure shows its application to a contaminated stream.

Method for producing a mixed microorganism attached activated carbon for water purification according to the present invention is a carbonization step (S10), activated carbon production step (S20), active liquid production step (S30), active liquid injection step (S40), cutting activated carbon It consists of a step S50 and a packing step S60.

The carbonization step (S10) is a process of carbonizing wood, the process of heating the chamber at 700 ~ 1300 ℃ temperature for 24 to 26 hours after the wood, such as bamboo, palm, oak, etc. in the air-blocked chamber Carbonization step (S10).

Through this carbonization step (S10), the organic components inside the wood are gasified to escape from the wood, due to the gas escapes a number of voids are developed in the wood. Pollutants immediately adsorb to these pores and purify them.

The activated carbon manufacturing step (S20) is a process of activating the carbonized wood to further expand the pores formed in the wood in the carbonization step (S10). In the activated carbon manufacturing step (S20), the specific surface area of the activated carbon is expanded by expanding the pores using steam or NaOH, or the like, so that the pores are better maintained. Since this activation process has been used a lot in the prior art, a detailed description thereof will be omitted.

The active liquid manufacturing step (S30) is a process of making the active liquid using a mixed microorganism, it is composed of a mixing step (S31), the culture step (S32) and the air injection step (S33).

The mixing step (S31) is a process of mixing 1 to 10% by weight of mixed microbial solid medium, molasses or sugar 1 to 5% by weight, and water by mixing 85 to 98% by weight of the culture medium. In the present invention, a mixed microorganism is used instead of a single strain. The mixed microorganism has a high adaptability to the environment, and thus has an effect of decomposing organic substances in a long contaminated area. On the other hand, the mixed microorganisms used in the present invention may be used by the worker by mixing various single strains or by mixing various mixed strains depending on the situation.

The culture step (S32) is a process of making the active solution by culturing the culture solution made in the mixing step (S31) for 3 to 7 days at a temperature of 15 ~ 35 ℃.

The air injection step (S33) is a process of injecting a predetermined amount of air into the culture solution at intervals of 4 to 12 hours during the culture process. When the air is supplied to the culture by supplying electricity for 4 hours each time from once to six times a day using a timer, the culture is activated. The amount of air injected at this time is to maintain DO 1 ~ 10mg / L. While the air is not injected, the stirrer is operated to stir the culture solution. This process produces an active liquid with a pH of 4 or less (usually 3.3-3.8).

The active liquid injection step (S40) is a process of attaching the mixed microorganisms to the activated carbon by injecting the active liquid made in the active liquid manufacturing step (S30) into the activated carbon produced in the activated carbon manufacturing step (S20), the dilution step (S41) and the stirring step It consists of S42.

The dilution step (S41) is a process of diluting 10 to 50 times by mixing water with the active liquid prepared in the active liquid manufacturing step (S30). In other words, since the prepared active liquid has a high concentration of mixed microorganisms, mutual interference effects appear when attached to activated carbon. Because of the interference effect, the purification effect is not sufficiently compared to the density of the mixed microorganisms. Thus, when the active liquid was diluted and various experiments were conducted, the adhesion culture rate of the mixed microorganisms was high.

The stirring step (S42) is a process of rotating the incubator after inputting the activated liquid diluted with the activated carbon into the incubator. In more detail, the nozzle is installed in the incubator, and activated carbon is injected into the incubator and rotated to inject the diluted active liquid through the nozzle. At this time, the active liquid is injected 25 to 35% by weight of the weight of activated carbon introduced into the incubator.

The activated carbon cutting step (S50) is a process of cutting or pulverizing activated carbon to which a mixed microorganism is attached to a predetermined size. The mixed microorganism-attached activated carbon produced by the present invention is different in size depending on the intended use, and thus the activated carbon is cut in accordance with each use. For example, activated carbon (PAC) with a size of less than 1 mm can be used for rapid action in farms where red tide and toxic substances are introduced or in protected water supply areas where contaminants are introduced, and activated carbon (GAC) with a size of 1 mm or more Silver can be used in streams with severe deposits of pollutants, in areas with severe river changes, or at high flow rates.

The packing step (S60) is a process of packaging the activated carbon cut to a predetermined size in the activated carbon cutting step (S50) in a pack having a pore of 1mm or less. In the activated carbon cutting step (S50), the activated carbon cut to a size of 1 mm or more is packed in a pack made of a material such as nylon. The reason for this patterning is to prevent the loss of activated carbon because the activated carbon is likely to be lost in the high velocity water, and to facilitate the recovery of the activated carbon when it is recovered for reuse. In other words, the packing step (S60) in the present invention is optional. That is, the present invention may be completed by cutting the activated carbon to a certain size by implementing the activated carbon cutting step (S50), but in some cases, it is also possible to pack the activated carbon powder in a pack.

Activated carbon prepared by the method of the present invention as described above was used in aquaculture farms (Utilization Example 1) and severely polluted rivers (Utilization Example 2).

[Utilization example 1] Farm which red tide occurred

Activated charcoal with a particle size of 1 mm or less using mixed microorganisms was applied to the red tide flowing into the cage. Since most of the red tide are concentrated within 1.5m from the surface layer, spraying activated carbon with a small particle size of 1mm or less, the activated carbon drifts on the surface for several hours, adsorbing the red tide organisms, reducing the individual density and adhering to the precipitated activated carbon. It was confirmed that mixed microorganisms continuously decomposed organic matter and induced self-cleaning action to drastically reduce the death of aquaculture farms.

Changes in Red Tide Populations after Spraying Activated Carbon in Red Tide Areas Elapsed time (minutes) 0 30 60 90 120 150 180 210 Coclodinium
(Object / ml) 4600 2500 800 150 85 40 35 28

[Utilization example 2] River with severe pollution

Bamboo activated carbon having a particle size of 1 mm or more with mixed microorganisms was sprayed on a highly polluted river. Activated carbon was packed with nylon (0.5 mm in diameter), bamboo activated carbon was added to the polluted stream, and the COD of the stream was analyzed over time. These data are listed in [Table 2], the appearance can be confirmed through [Figure 2].

COD observation after spraying activated carbon on polluted river area Elapsed time (days) 0 One 3 5 7 9 12 15 COD 117.8 94.3 89.3 60.5 46.6 27.3 19.8 20.3

S10: carbonization step S20: activated carbon manufacturing step
S30: active liquid preparation step S31: mixing step
S32: culture step S33: air injection step
S40: active liquid injection step S41: dilution step
S42: stirring step S50: activated carbon cutting step
S60: Packing Step

Claims (5)

A carbonization step (S10) of carbonizing wood; Activated carbon production step (S20) to activate the carbonized wood to make the activated carbon expanded pores; An active liquid preparation step (S30) of making an active liquid using a mixed microorganism; An active liquid injection step (S40) of injecting the active liquid into the activated carbon to attach mixed microorganisms to the activated carbon; Activated carbon cutting step (S50) for cutting or pulverizing the activated carbon attached to the mixed microorganisms to a predetermined size;
The active solution preparation step (S30) is a mixed step (S31) of mixing the mixed microorganism solid medium 1 ~ 10% by weight, molasses or sulfur sugar 1 ~ 5% by weight, water 85 ~ 98% by weight;
A culture step (S32) of culturing the culture solution at a temperature of 15-35 ° C. for 3-7 days to make an active solution;
Air injection step (S33) for injecting a predetermined amount of air into the culture medium at intervals of 4 to 12 hours during the culturing process; manufacturing method of mixed microorganism-attached activated carbon for water purification, characterized in that consisting of.
The method according to claim 1,
The active liquid injection step (S40) is a dilution step (S41) of mixing and diluting water to the active liquid prepared in the active liquid manufacturing step (S30);
Method of producing a mixed microorganism-attached activated carbon for water purification, characterized in that consisting of; stirring step (S42) to rotate the incubator after the activated carbon and the diluted active liquid in the incubator.
delete The method according to claim 1,
The carbonization step (S10) is a method of producing a mixed microorganism-attached activated carbon for water purification, characterized in that the wood is put into the air-blocked chamber and then the chamber is heated at a temperature of 700 ~ 1300 ℃ for 24 to 26 hours. .
The method according to claim 1,
Activated carbon cutting step (S60) for packaging the activated carbon cut to a certain size in the activated carbon cutting step (S50) in a pack having a pore size of less than 1mm; S60 of the mixed microorganism-attached activated carbon for water purification Manufacturing method.

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