KR101938497B1 - Microbiological non-sludge treatment method for the high concentration of organic waste water - Google Patents

Abstract

The present invention relates to a method for microbial sludge reduction for highly concentrated organic wastewater. More specifically, a complex microorganism preparation which is extracted from highly concentrated organic wastewater and cultivated by adaptation in a harsh natural environment is used to reduce BOD, COT, total phosphorous (TP) and total nitrogen (T-N), and to suppress malodor generation during decomposition and remove malodor. By introducing the liquid complex microorganism preparation into a wastewater storage tank at a constant concentration, wastewater treatment and malodor removal can be achieved at the same time, and the amount of sludge generation can be significantly reduced as compared with a conventional wastewater treatment method.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microbiological non-sludge treatment method for a high concentration organic wastewater,

The present invention relates to a method for reducing microbial sludge to a high concentration of organic wastewater, and more particularly, to a method for reducing microbial sludge in a high concentration organic wastewater, (CO), total phosphorus (TP) and total nitrogen (TN) can be reduced by decomposition, and the odor can be suppressed and the odor can be removed during the decomposition. By introducing the liquid microorganism preparation into the wastewater storage tank at a constant concentration, The present invention relates to a method for reducing microbial sludge for a high concentration of organic waste using a complex microbial agent which can achieve both treatment and odor removal at the same time and can significantly reduce the amount of sludge generated compared to the conventional wastewater treatment method.

As the environmental pollution problem caused by wastewater becomes serious, the wastewater treatment facility is operated in each province and the problem of the treatment of sludge generated in the process and the decay of the organic component contained in the sludge generated in the wastewater treatment The problem of bad odor is serious.

In the past, sludge was treated as a marine dumping method. However, due to the marine pollution prevention treaty, marine dumping of sludge has been banned since 2012, and currently sludge is disposed of by landfill or incineration.

However, when sludge is landfilled, secondary environmental pollution problems such as soil pollution occur, and it is becoming more and more difficult to obtain additional landfill sites. This is raising the landfill contribution. Also, in case of incineration of sludge, there is a problem of air pollution due to combustion products, which makes construction of incinerator difficult and incineration cost is increasing. In any case, the financial burden of the local governments is increasing.

Therefore, it is very important to develop an economical method for treating wastewater and to reduce the amount of sludge generated, and to effectively block odor generation or to remove odorous components.

1. Patent Publication No. 10-1207373 2. Patent Publication No. 10-1744023

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a biological treatment technique for treating wastewater using a complex microorganism preparation, including a sewage treatment plant, a manure treatment plant, a waste and sewage treatment plant, The present invention has been made to solve the above problems, and it is an object of the present invention to provide a microorganism method for treating organic wastewater of high concentration using a complex microorganism preparation which is excellent in action and effect such as odor removal and water purification.

The above object of the present invention is achieved by a microbiological sludge reduction method for highly concentrated organic wastewater, comprising: introducing raw wastewater; Removing foreign matter such as gravel, sand, and metal from the aeration and decontamination tank through the introduced wastewater water; A flow stabilization step for stabilizing a flow rate fluctuation of the wastewater from which foreign matter has been removed in the flow rate adjustment tank; An organic matter decomposing step of supplying the mixed microorganism preparation at a rate of 0.5 to 5 vol% to the wastewater in the aeration tank by supplying the wastewater stabilized in the flow stabilization step to oxidize and decompose the organic matter; A first precipitation step of precipitating and separating the activated sludge in the first sedimentation tank after the organic matter decomposition step; Removing nitrogen and phosphorus from the supernatant separated in the first precipitation step and activating the complex microorganism; A second precipitation step of precipitating the activated sludge in a second settling tank and separating the activated sludge and the supernatant liquid; A step of disinfecting the supernatant liquid separated in the second precipitation step by disinfecting the disinfection tank with sufficient contact with chlorine; And discharging the supernatant liquid having been disinfected in the disinfection step, wherein the activated sludge separated in the first precipitation step is internally transported to the aeration tank, wherein the microbial sludge reduction method Lt; / RTI >

Accordingly, the microbial sludge reduction method for the high concentration organic wastewater according to the present invention is a method for reducing microbial sludge to high concentration organic wastewater by reusing the mixed microbial agent cultivated by extracting from high concentration organic wastes and cultivating them in a harsh natural environment environment, Therefore, if the microbial agent is added only for a certain period of time, continuous microbial input is not required, and odor caused by aerobic fermentation can be lowered in treating a high concentration organic wastewater.

The present invention also relates to a method for treating organic wastewater of high concentration using a complex microbial agent and a microbubble generator using a conventional activated sludge process or a modified form of activated sludge process suitable for organic wastewater such as living wastewater, It is possible to simplify the facility by replacing its role in the microorganism active tank without separately installing a chemical treatment tank which is essentially required in the sewage and wastewater treatment method of the present invention.

FIG. 1 is a process chart of a high concentration wastewater treatment using a complex microorganism preparation.

The terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms and the inventor may appropriately define the concept of the term in order to best describe its invention It should be construed as meaning and concept consistent with the technical idea of the present invention.

Therefore, the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, It is to be understood that equivalents and modifications are possible.

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

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a process diagram of a wastewater treatment using a complex microorganism preparation according to the present invention. FIG. As shown in FIG. 1, the microbial sludge reduction method for highly concentrated organic wastewater according to the present invention comprises the steps of introducing raw water of wastewater to be treated and supplying the raw wastewater into the aeration tank, Remove the foreign substance to remove the same foreign substance.

In order to stabilize the fluctuation of the flow rate of the wastewater from which the foreign substance is removed in the flow rate adjusting tank, the flow rate stabilization step is performed to equalize the flow rate and equalize the water quality by reducing the impact load of the wastewater.

Then, the stabilized wastewater is supplied in the flow stabilization step, and the complex microorganism preparation is supplied at a rate of 0.5 to 5 vol% to the wastewater which is required to be treated in the aeration tank, thereby decomposing the organic matter to oxidize and decompose the organic matter.

Here, the complex microorganism preparation is an aerobic microorganism produced by culturing a filamentous fungus in a vacuum container at a temperature of 35 ° C to 60 ° C for 6 hours to 60 hours at a temperature of 6 to 12 hours, and then culturing at room temperature for 3 hours to 2 days. Endogenous spore forming gram-positive bacteria, thermogenic anaerobic gram negative bacilli, actinomycetes, heat-resistant actinomycetes, and aerobic chemically synthesized bacteria.

The representative species of aerobic microorganisms are Pseudomonas sp., Serratia sp., Stenotrophomonas sp., Bacillus sp., Nitrosomonas sp., Streptomices sp. .

In order to examine the efficacy of the combined microorganism preparation used in the present invention, the presence and content of amino acids in plant growth promoting amino acids were analyzed in a basic scientific analysis laboratory. The quantification of each amino acid means that each amino acid per 50 μl of the sample is present as much as the corresponding pmol.

<Amino acid analysis result of mixed microbial juice> Amino acid Aount (pmol) reference Amino acid Aount (pmol) reference Asp 467.178 Asparatc acid Pro 49.704 proline Glu 1258.449 Glutamic acid Tyr 3.975 tyrosine ASn 34.406 asparagine Val 16.394 valine Ser 42.8 serine Met 8.110 메티오 로 Gln 9.919 glutamine Cys2 7.808 cystine Gly 101.918 glycine IIe 10.917 isoleucine His 2.188 histidine Leu 494.52 leucine Arg 22.822 arginine Phe 9.711 피 phenylalanine Thr 15.225 threonine Trp 9.740 tryptophane Ala 39.390 field Lys 18.992 lycine

After the organic matter decomposition step, the first sedimentation step separates the activated sludge from the supernatant in the first sedimentation tank, and nitrogen and phosphorus are removed from the supernatant separated in the first precipitation step to activate the complex microorganism.

Thereafter, the activated sludge is re-precipitated in the second settling tank, and a second settling step is performed to separate the activated sludge from the supernatant. The separated supernatant is disinfected in a disinfection tank using a disinfectant such as chlorine, and then the disinfected supernatant is discharged.

In addition, the present invention resides in that the activated sludge separated in the first precipitation step is internally transported by the aeration tank and reused, thereby allowing the complex microorganism contained in the activated sludge to adapt to the high concentration organic waste treatment process environment, It is possible to continuously treat organic wastewater at a high concentration without re-injection.

Here, the amount of activated sludge transported in the aeration tank is 10 to 20%.

The activated sludge separated in the first settling tank and the second settling tank is concentrated and largely discarded, and some of the activated sludge is transported to the inflow step of the wastewater and the first settling step so as not to completely discharge the loaded complexed microorganism preparation desirable.

[Example 1]

The combined microorganism strain cultivated in a harsh natural environment after being extracted from a high concentration of organic wastes is added to the food wastes leachate at a rate of 1.0 vol% per day for about 2 months, and 20% is returned to the aeration tank in the first settling tank, In the concentration tank, the mixed microorganisms which are supplied by the external transfer to the aeration tank and the raw water inflow stage are prevented from being completely discharged, so that they can be cultured by adapting to the environmental conditions.

As shown in Table 2, the treated food waste leachate according to the present invention exhibits a BOD removal rate of 99.6%, a COD removal rate of 98.9%, a T-N removal rate of 97.1%, and a T-P removal rate of 98.8%.

<Treatment of food waste leachate> division Waste water
(mg / l) Liquid processing
(mg / l) Throughput
(%) BOD 39,230 150.9 99.6 COD 34,000 380 98.9 SS 26,200 182.5 99.3 T-N 1,536.8 44.8 97.1 T-P 848 9.938 98.8

[Example 2]

In addition, the odor elimination test of the complex microorganism preparation used in the present invention was conducted using the detection tube method of GASTEC Co., JAPAN at Korea Research Institute of Chemical Technology, and hydrogen sulfide (H ₂ S) Methyl mercaptan (CH ₃ SH), basic odorant ammonia (NH ₃ ) and amine (trimethylamine, (CH ₃ ) ₃ NH ₂ ) were used. In each device adjusted to the initial concentration, 20 ml of the sample solution diluted with 150 times of the stock solution of the microorganism preparation was sprayed through the sprayer, and then the concentration was measured by Gas Tech at 30 minutes, 1 hour, 2 hours and 6 hours The test results are shown in the table below.

<Result of odor removal test> Test Items time unit Results ammonia Hydrogen sulfide Methyl mercaptan Trimethylamine mask
Chest
city
Hum Initial concentration ppm 60 60 50 60 After 0.5 hours ppm 22 41 48 20 After 1 hour ppm 20 37 48 20 After 2 hours ppm 19 32 48 18 After 4 hours ppm 17 30 45 13 After 6 hours ppm 14 25 42 12 Removal rate % 76.7 58.3 16 80

  According to the test results of Examples 1 and 2, it can be seen that the high concentration organic wastewater treatment sludge reduction method using the complex microorganism preparation according to the present invention is very effective in removing odor and treating highly concentrated organic wastewater.

Therefore, it is possible to satisfy the T-N, T-P, BOD, COD and SS standard values after the raw water treatment, and the sludge and odor can be greatly reduced. In addition, the microbial sludge reduction method for high concentration organic wastes using the complex microorganism preparation according to the present invention can reduce the operation cost compared with the conventional method because the microorganism is operated after the introduction of the microorganism for one month, Since the cost is greatly reduced, the financial burden of the local governments is reduced.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, Various changes and modifications will be possible.

Claims (5)

A microbiological sludge reduction method for highly concentrated organic wastewater,
Introducing raw water of wastewater;
Removing foreign matter such as gravel, sand, and metal from the aeration and decontamination tank through the introduced wastewater water;
A flow stabilization step for stabilizing a flow rate fluctuation of the wastewater from which foreign matter has been removed in the flow rate adjustment tank;
An organic matter decomposing step of supplying the mixed microorganism preparation at a rate of 0.5 to 5 vol% to the wastewater in the aeration tank by supplying the wastewater stabilized in the flow stabilization step to oxidize and decompose the organic matter;
A first precipitation step of precipitating and separating the activated sludge in the first sedimentation tank after the organic matter decomposition step;
Removing nitrogen and phosphorus from the supernatant separated in the first precipitation step and activating the complex microorganism;
A second precipitation step of precipitating the activated sludge in a second settling tank and separating the activated sludge and the supernatant liquid;
A step of disinfecting the supernatant liquid separated in the second precipitation step by disinfecting the disinfection tank with sufficient contact with chlorine; And
And disinfecting the sterilized supernatant in the sterilization step,
The activated sludge separated in the first precipitation step is internally transported to the aeration tank,
The combined microorganism preparation is an aerobic microorganism produced by culturing a filamentous fungus in a vacuum container for 6 hours to 12 hours under aging at 35 to 60 ° C, followed by secondary culturing at room temperature for 3 hours to 2 days,
Wherein said complex microorganism preparation is composed of at least one of Gram positive bacterium, endogenous spore forming gram positive bacterium, tuberous anaerobic gram negative bacterium, actinomycetes, thermostable actinomycetes, and aerobic chemically synthesized bacterium,
Wherein the activated sludge separated from the first sedimentation tank and the second sedimentation tank is respectively concentrated, and a part of the activated sludge is transported to the inflow step of the wastewater and the first precipitation step, respectively, and the microbial sludge reduction method for the high concentration organic wastes .
The method according to claim 1,
Wherein the activated sludge transported in the aeration tank is 10 to 20%.
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