KR20070024768A - Organic trash destruction method and system equipped with membrane bio reactor - Google Patents

Abstract

An organic waste decomposing system having a membrane for processing condensed water, and a method for decomposing organic waste are provided to completely decompose food garbage without secondary pollution by biologically decomposing organic waste by using aerobic fermentation reaction of microorganisms, and processing condensed water and an odor from gas by using a membrane system and a biological method. An organic waste decomposing system includes an input device, a reactor, a chiller for cooling steam generated in a processor into water, a gas-water separator for separating steam into water and gas, a bio filter for converting the gas into harmless gas of which an odor component is dissolved and removed, a BOD(Biochemical Oxygen Demand) controller for biologically processing water, and an external air automatic control device for automatically injecting external fresh air into the system. The reactor includes an agitator for mixing organic waste with aerobic high temperature fermented microorganisms, a ring blower for sending compressed air to the inside of the system for supplying air to make aerobic high temperature fermented microorganisms act, and a trace heater for keeping the reactor warm, a temperature sensor for sensing a temperature of the reactor for controlling the heater and the ring blower, and a discharging device for discharging materials processed in the system. The BOD controller includes an anoxic tank(241), a first aeration tank, and a second aeration tank having a submerged membrane, and an activated charcoal tank(244).

Description

Organic trash destruction method and system equipped with membrane bio reactor

1 is a block diagram showing an organic waste treatment apparatus according to a conventional embodiment,

2 is an overall process diagram of an organic waste decomposition apparatus according to a preferred embodiment of the present invention,

3 is a perspective plan view of the decomposition apparatus according to the present invention;

4 is a cross-sectional view taken along line AA ′ of FIG. 3;

5 is a perspective front view of the decomposition apparatus according to the present invention;

6 is a perspective left side view of the decomposition apparatus according to the present invention;

7 is a perspective right side view of the decomposition apparatus according to the present invention;

8 is a perspective plan view of the condensate treatment apparatus according to the present invention;

9 is a perspective front view of the condensate treatment apparatus according to the present invention;

10 is a cross-sectional view of the portion “A” of FIG. 9;

FIG. 11 is a detail view of portion “B” of FIG. 9;

12 is a perspective left side view of the condensate treatment apparatus according to the present invention;

13 is a perspective plan view of a flat membrane system for treating condensate according to the present invention;

14 is a perspective front view of a flat membrane system for treating condensate according to the present invention;

15 is a perspective left side view of the flat membrane system for treating condensate according to the present invention;

16 is a membrane material analysis result using the FT-IR of the decomposition apparatus flat membrane according to the present invention,

17 is a surface analysis result (3000 magnification) using an electron microscope of a flat film of the decomposition apparatus according to the present invention,

18 is a cross-sectional analysis (5000 times magnification) using an electron microscope of the decomposition apparatus flat membrane according to the present invention.

<Explanation of symbols for the main parts of the drawings>

100: organic waste treatment apparatus according to a conventional embodiment

110: fermentation tank 112: agitator

120: cooling tank 122: discharge pipe

124: bending pipe 125: circulation pipe

126: pump 130: gas-liquid separator

132: primary drain pipe 134: exhaust pipe

136: air inlet tube 140: solid-liquid separator

142: secondary drain pipe 144: drain control valve

200: organic waste decomposition apparatus according to a preferred embodiment of the present invention

201: motor base 202: BOD tank

203: air blow chamber 204: frame

205: Shell Casing 206: Arm Blade

207: side frame "L" 208: site frame "R"

209: door cover 210: outlet door cover

211: flange gasket 212: shaft

213: sprocket 214: sprocket

215: water separator 216: cooling device tank

217: pad plate 218: deodorizer

219: power cylinder door cover 221: safety cover

222: outer cover 231: dumping unit

232: Automatic air control device 233: Air supply

241: inflow tank (anoxic tank) 242: aeration tank

243: sedimentation tank 244: discharge tank (activated carbon tank)

245: 1st aeration tank 246: 2nd aeration tank (MBR tank)

301: gear motor 302: blowing blower

303: cooling device 304: heating device (LINE HEATER)

305: body heater (TRACE HEATER) 306: roller chain

307: Caster 308: Control Panel

309: hex bolt, nut 310: electric device

311: solenoid valve 312: temperature sensor

313: pump 314: pump for the cooler

400: condensate treatment device according to a preferred embodiment of the present invention (BOD tank)

401: water treatment immersion type flat membrane 402: underwater heater

403: low water level sensor for boiler 404: diffuser

405: solenoid valve 406: solenoid pump

407: press bracket 408: acrylic cover

409: socket bolt, spring washer, nut 410: packing

412: solenoid valve 413: blower outlet

414: air pump 415: inflow tank (oxygen tank)

416: aeration tank 417: aeration tank

418: discharge tank (activated carbon tank)

500: flat membrane system for treating condensate in accordance with a preferred embodiment of the present invention

501: flat sheet bracket 502: PVC plate

503: PVC pipe 504: socket bolt, spring washer, nut

505: socket bolt, nut 506: socket bolt, nut

507: hose

The present invention relates to an organic waste decomposition apparatus equipped with a flat membrane for treating condensate, and in particular, organic waste decomposition equipped with a membrane bioreactor (MBR) equipped with a purification function of condensate generated during the decomposition of organic waste. Relates to a device.

Organic wastes such as food waste have high moisture in terms of properties and decay due to high content of degradable organic matter, which can cause many problems in storage, transportation, intermediate treatment and final treatment.

In particular, landfilling, leachate, odors, etc. in landfills have been pointed out as a problem. Among these organic wastes, direct landfilling was banned from July 2003 for various sludges and food waste from January 2005. According to the Waste Management Act, it can be reduced, resourceized, and reclaimed or used effectively.

The ban on direct landfilling has led to an increasing interest in the recycling of organic wastes, and in conjunction with the new social trend of resource recycling society, which has been proposed as a social issue since 2000, the interest in the recycling of organic wastes is increasing. .

In 2000, the annual amount of food waste in Korea was 4.2 million tons, of which about 2 million tons were recycled as feed or compost, representing a 49.3% recycling rate. In general, more than 50.7% of food waste is not recycled and has been treated by landfilling, incineration, or some simple composting methods, but contaminants are generated during these treatments, and they act as secondary sources of pollution to the environment. It is true that negative perception has caused social problems and attracting treatment facilities. Among them, simple landfill food waste is one of the most serious problems due to water pollution and soil pollution caused by leachate.

Therefore, the emergence of new treatment technology is required following the existing food waste treatment method. An object of the present invention is to develop a technique for economically and efficiently treating food waste without secondary pollution in order to solve this problem.

On the other hand, Figure 1 is a conventional embodiment, a block diagram showing an organic waste treatment apparatus according to the Republic of Korea Patent Publication No. 0478044. As shown in FIG. 1, the organic waste treating apparatus 100 according to the conventional embodiment includes an agitator 112 for cutting organic waste, and decomposes the organic waste with the added microorganism to remove moisture-containing carbon dioxide gas. Fermentation tank 110 to discharge; A cooling tank 120 for cooling the water-containing carbon dioxide gas generated in the fermentation tank and separating the water and the carbonic acid gas through the discharge pipe 122; Separating water and carbon dioxide gas introduced through the discharge pipe, the water is discharged through the primary drain pipe 132 formed at the bottom, the carbon dioxide gas is returned to the fermentation tank through the exhaust pipe 134 formed at the top Gas-liquid separator 130; Is installed in the cooling tank, and the organic waste treatment apparatus comprising a solid-liquid separator 140 for filtering sludge from the water introduced through the primary drain pipe and discharges through the secondary drain pipe connected to the outlet end. . This apparatus filters and discharges water generated during the treatment of organic waste, but lacks a purification function, and there is a problem in that the discharged water cannot be reused.

The present invention, after inputting the object to be treated, initially applies a slight hot air to promote the reaction of the microorganism, and when the internal temperature of the processing apparatus is 40 ℃ or more by using the self-fermentation heat generated by the aerobic fermentation reaction of the microorganism The organic waste is biologically decomposed, and the odors of condensate and gas separated from the water separator in the process are treated by flat membrane system and biological method, and finally converted into water and carbon dioxide gas. By treating with flat membrane, the removal rate of BOD, COD Mn, suspended solids, etc. is remarkably improved, so that organic waste such as food waste is completely decomposed and destroyed without environmental pollution.

The decomposition apparatus of the present invention is composed of an input device (automatic / manual type)-reactor (decomposition device)-cooling device (CHILLER)-water separation device-BIO FILTER (deodorizer)-BOD control device-external air automatic control device Automatic / manual operation is possible and automatic operation is operated by programmed data. One cycle extinction time of this device is based on 24 hours, and the decomposed inorganic material is automatically discharged to the outside of the device once every 2 ~ 4 months by AUTO CLEANER. The released inorganic substance is the same as soil, so it is used as cover material.

Device-specific functions of the decomposition apparatus according to the present invention are as follows.

(1) input device

The dosing device is designed so that food waste and sludge are introduced without being agglomerated by vibrating without being exposed to the outside.

(2) Reactor (decomposition device)

The reactor consists of a stirring device, a blowing device (RING BLOWER), a body heater (TRACE HEATER), a heating device (LINE HEATER), a temperature sensing device, a discharge device, each role is as follows.

(A) Stirring device: The organic wastes (food waste, sludge) added to the mixture are mixed with the aerobic high-temperature fermentation microorganisms in the device while repeating the forward / reverse rotation for 5 minutes every hour.

(B) RING BLOWER: Compressed air is sent from the lower part of the reaction tank to the inside of the device to supply air for the aerobic high temperature fermentation microorganisms to work.

(C) Body heater (TRACE HEATER): It is a device to insulate the processing device, and it is attached to the body of the processing device like the heat insulator, and it is automatically turned on / off around 40 ℃.

(D) LINE HEATER: Installed at the front of the blower, and blows food waste and sludge, which is the object of treatment, into the treatment device, and then blows it to promote the activity of aerobic high-temperature fermentation microorganisms only at the beginning. It is a device to warm the air. When the reaction of microorganism starts and the temperature inside the processing device reaches 40 ℃, the operation is automatically stopped and the on / off operation is activated according to the temperature change.

(E) Temperature sensing device: A device that controls the heater and blower by sensing the temperature inside the reactor. It is installed at two or three places inside the device according to the size of the device to detect the temperature of the whole device evenly.

(F) Discharge device: It is attached to the side and front of the reactor, and when the door of the discharge device is opened and the stirrer is reversed, the treated material inside the device is discharged out.

(3) CHILLER

Gas and water vapor generated when organic waste is decomposed by microorganisms in the processing device is moved to the upper part of the processing device based on the floating principle, and the gas and water vapor transferred to the upper part are moved to the water separator through the moving pipe. The instantaneous temperature difference is generated by the chiller installed in the moving pipe, and water vapor is converted into water.

(4) water separator

Located at the end of the treatment unit, water vapor is converted by the temperature difference during the passage of the cooling unit to separate the produced water and gas.

(5) BIO FILTER

The gas separated from the water separator contains malodorous constituents because it is produced by decomposition of organic waste by microorganisms. The deodorizer is installed on the side of the water separator of the treatment device, and is filled with a microbial carrier (Rock Wool + Earthworm Feces) that immobilizes odor-decomposing microorganisms. Is switched to.

(6) BOD control device

Biological treatment of water separated from the water separation device, BOD less than 10mg / L can be directly discharged.

(7) External air automatic control device

If the air circulation continues, the aerobic activity may be slowed down by decreasing the oxygen ratio. Therefore, a device for automatically injecting outside air is attached to the inlet of the circulation pipe so that fresh air is sucked into the device during the blower and suction operation. It is supposed to be.

In order to evaluate the performance of the decomposition apparatus according to the present invention, the organic matter decomposition ability of the decomposition apparatus was evaluated for food waste and fertilizer quality inspection was performed on the by-products. The Korea Testing Institute conducted a test analysis and performance evaluation.

In carrying out the performance evaluation, Comparative Examples and Examples were performed.

The condensate treatment tank of the comparative example is composed of an inflow tank (anoxic tank) 241, an aeration tank 242, a precipitation tank 243, and a discharge tank (active carbon tank) 244.

The condensate treatment tank of the embodiment is composed of an inflow tank (anoxic tank) 241, a primary aeration tank 245, a secondary aeration tank (MBR tank) 246, and a discharge tank (active carbon tank) 244.

As a comparative example, a decomposition apparatus without a flat membrane is designed and manufactured to perform a trial run. As an example, a system for applying a membrane separation method is additionally designed and manufactured, and the organic matter decomposition rate and water treatment efficiency of the present invention for food waste. And odor reduction efficiency were evaluated. On-site evaluation of the decomposer was conducted by installing the food waste discharged from the restaurant daily after installing the manufactured device.

(Comparative Example)

As a comparative example, for on-site performance evaluation of the food waste decomposing device (70 kg / day), the site evaluation was performed for about 1 month from September 20 to October 23 after installing the decomposing device. The input food waste was the residue left from the restaurant.

The amount of food waste and the operating conditions of the decomposing device put into the field evaluation are shown in [Table 1]. 60 kg of sawdust, 250 kg of stray light, and 3 kg of microbial agent were added to the reactor for moisture control and microbial fermentation.

Food waste input and operating condition of decomposition device date Reactor temperature (℃) Input (kg) date Reactor temperature (℃) Input (kg) date Reactor temperature (℃) Input (kg) 9/20 30.0 25.0 10/4 36.9 24.5 10/14 40.6 20.4 9/21 34.0 20.0 10/5 39.1 23.1 10/15 38.7 21.9 9/22 32.5 22.6 10/6 38.4 20.6 10/16 37.6 14.3 9/23 44.3 23.1 10/7 39.4 22.9 10/18 39.6 22.6 9/24 40.1 21.9 10/8 40.1 21.8 10/19 41.5 23.8 9/25 40.5 12.5 10/9 39.2 17.0 10/20 38.4 20.1 9/30 43.0 17.5 10/11 39.8 34.1 10/21 39.8 21.6 10/1 41.8 24.1 10/12 41.3 26.5 10/22 39.8 23.9 10/2 42.8 14.6 10/13 40.5 24.3 10/23 42.3 17.8

The total input of food waste to the cracker was 582.5 kg, the average input was 21.6 kg, and the average reactor temperature was 39.3 ℃.

Performance evaluation items and evaluation methods of the food waste decomposing device (70 kg / day) are shown in [Table 2].

Food Waste Decomposition Apparatus Evaluation Content Evaluation item Assessment Methods Input food waste and reactor by-product Organic matter, moisture, solids, loss of ignition, volatile solids Waste Process Test Method Separator Condensate and Treated Water BOD, COD Mn, SS, T-N, T-P Water Pollution Process Test Method Odor Analysis Volatile Organic Compounds (VOCs) GC / MSD

* SS: suspended solids, T-N: total nitrogen, T-P: total phosphorus, GC / MSD: gas chromatograph

In order to investigate the characteristics of food waste, general component analysis was conducted on food waste and reactor by-products for five items such as organic matter, moisture, solids, loss of ignition, and volatile solids. The analysis results are shown in [Table 3].

Analysis results of general food waste and byproducts of reactor division moisture Solid content Ignition loss Volatile Solids Organic matter Test Methods Input food waste 9/20 88.0 12.0 97.8 9.8 81.7 Waste Process Test Method 9/21 92.2 7.8 97.6 5.4 69.2 Reactor byproducts 10/16 44.2 55.8 88.3 44.1 79.0 10/18 44.7 55.3 89.6 44.9 81.2 10/19 54.0 46.0 91.6 37.6 81.7 10/20 50.5 49.5 93.6 43.1 87.1 10/21 45.1 54.9 93.8 48.7 88.7 10/22 45.1 54.9 92.5 47.4 86.3 10/23 49.4 50.6 94.2 44.7 88.5

Leachate and moisture of food waste that are introduced into the cracker are condensed through the water separator in the reactor and flows into the condensate treatment tank. The condensate treatment tank of the comparative example is composed of an inflow tank (anoxic tank) 241, an aeration tank 242, a precipitation tank 243, and a discharge tank (active carbon tank) 244. Condensate passed through the water separator was analyzed six times during the evaluation period for the condensed water and the treated water treated with this device. The test results are shown in [Table 4].

Condensate water and treated water division 10/18 10/19 10/20 10/21 10/22 10/23 Average % Removal BOD Condensate 1065 765 860 1180 455 815 856 83.2 Treated water 128 111 64.0 102 278 183 144 COD Mn Condensate 277 275 261 263 279 237 265 72.1 Treated water 76.3 62.2 64.8 68.8 88.3 82.3 73.7 Suspended solids Condensate 50.0 58.0 48.0 55.0 48.0 31.0 48.3 69.8 Treated water 17.0 17.0 14.0 12.0 15.0 13.0 14.6 T-N Condensate 12.7 14.5 13.4 13.7 10.8 24.5 14.9 69.1 Treated water 3.89 4.66 3.89 3.98 6.29 4.94 4.61 T-P Condensate 16.3 9.48 8.20 7.97 7.09 5.57 9.10 60.7 Treated water 5.40 6.73 3.74 2.91 1.18 1.44 3.57

The condensate passing through the water separator is introduced into the condensate treatment unit, and the odor component is introduced into the gas processor and treated by the microbial reaction. The analysis results for the VOCs are shown in [Table 5].

Analysis of VOCs in Reactor and Site Boundaries division unit Reactor (10/18) Reactor (10/23) boundary Hexane ug / L ND ND 4.04 Cyclohexane ND ND ND MIBK 20.6 72.7 ND Ethylbenzene ND 0.46 1.99 1,3dimethybenzene ND ND 0.38 MC 10.5 ND ND Benzene ND ND ND TCE ND 3.70 ND Toluene 8.85 25.7 43.1 mp-xplene ND 0.97 1.88 Styrene ND ND 1.61 o-Styrene ND ND 0.38 MEK 196 717 13.1

* ND: Not detected

(Example)

Comparative Example of the Food Waste Decomposition Apparatus As a result, the removal rate of the BOD and the like of the condensate treatment device was found to be 60.7 to 83.2% (see Table 4). The system was introduced to design and fabricate a disintegrator with an immersion flat membrane in the secondary aeration tank of the condensate treatment unit.

The condensate treatment tank of the embodiment includes an inflow tank (anoxic tank) 241, a primary aeration tank 245, a secondary aeration tank (MBR tank) 246, and a discharge tank (active carbon tank) 244.

The MBR system for condensate treatment consists of six flat membranes installed in the secondary aeration tank (MBR tank) of the condensate treatment unit. 8 to 12 are schematic views of the condensate treatment apparatus, and FIGS. 13 to 15 are schematic views of the condensate treatment flat membrane system.

After completion of the performance evaluation of the comparative example, the decomposition apparatus was taken out, and a condensate treatment MBR system was manufactured according to the design drawing. The condensate treatment system for the first performance evaluation of the cracker was removed, and the newly manufactured MBR system was connected to the cracker.

For the on-site evaluation of the food waste decomposer (70 kg / day) equipped with the MBR system, the site was evaluated for about 20 days from March 26 to April 23 after the installation. The input food waste was the residue left from the restaurant.

The amount of food waste and operating conditions of the decomposition apparatus introduced for the performance evaluation of the embodiment are shown in [Table 6]. 70 kg of sawdust, 240 kg of stray light and 3 kg of microbial agent were added to the reactor for moisture control and microbial fermentation.

Food waste input and operating condition of decomposition device date Reactor temperature (℃) Air temperature (℃) Input amount (kg) date Reactor temperature (℃) Air temperature (℃) Input amount (kg) date Reactor temperature (℃) Air temperature (℃) Input amount (kg) 3/28 42.1 41.0 23.1 4/7 38.0 35.0 16.0 4/15 43.7 39.6 12.0 3/29 41.0 38.0 30.9 4/8 45.0 38.0 19.5 4/18 42.5 39.2 26.3 3/30 42.1 36.0 40.4 4/11 39.6 36.4 22.5 4/19 40.9 36.8 30.6 3/31 40.4 34.0 23.9 4/12 42.6 36.9 44.5 4/20 41.5 38.4 25.4 4/4 45.3 40.5 23.4 4/13 44.5 40.1 16.3 4/21 40.8 34.5 26.9 4/6 37.1 34.0 21.7 4/14 44.7 40.5 12.6 4/22 41.8 36.8 24.1

The total amount of food waste was 440.0 kg, the average dose was 24.5 kg, the average reactor temperature was 41.8 ℃, and the average air temperature was 37.5 ℃.

[Table 7] shows the performance evaluation items and evaluation methods of the food waste decomposition device (70 kg / day) equipped with the MBR system.

Evaluation Items and Methods of Food Waste Decomposer with MBR System Evaluation Content Evaluation item Assessment Methods Input food waste and reactor by-product Organic matter, moisture, solids, loss of ignition, volatile solids, elemental analysis, C / N ratio Waste Process Test Method Separator Condensate and Treated Water BOD, COD Mn, SS, MLSS , MLVSS, Cl - Water Pollution Process Test Method Odor Analysis NH ₃ , R-NH ₂ , H ₂ S, CH ₃ SH The detective law Membrane Characterization Material, surface analysis FT-IR, SEM

* MLSS: Mixed Liquor Suspended Solids

MLVSS: Mixed Liquor Volatile Suspended Solids

FT-IR: Fourier Transform Infra Red Spectroscopy

SEM: Scanning Electron Microscope

In order to investigate the characteristics of food waste, 5 items such as organic matter, moisture, solids, loss of ignition, volatile solids, and C, H, and N were analyzed. The analysis results are shown in [Table 8] and [Table 9].

Food waste and reaction product by-product general component analysis results (Unit:%) division moisture Solid content Ignition loss Volatile Solids Organic matter C / N ratio Test Methods Input food waste 4/15 89.7 10.3 96.7 7.0 68.0 - Waste Process Test Method Fertilizer Quality Inspection Method 4/18 93.6 6.4 98.4 4.8 75.0 - 4/19 89.5 10.5 96.0 6.5 61.9 - 4/20 93.9 6.1 98.4 4.5 73.8 - 4/21 90.8 9.2 97.2 6.4 69.6 - 4/22 92.9 7.1 98.5 5.6 78.9 - Reactor discharge 4/15 43.8 56.2 90.9 47.1 83.8 17.4 4/18 44.0 56.0 87.5 43.5 77.7 14.9 4/19 54.8 45.2 87.8 33.0 73.0 16.2 4/20 51.8 48.2 89.6 37.8 78.4 14.4 4/21 48.1 51.9 87.5 39.4 75.9 15.9 4/22 49.0 51.0 89.2 40.2 78.8 21.6

Elemental Analysis Results of Input Food Waste and Reactor by-product (Unit:%) division C H N Test Methods Reactor discharge 4/15 47.3 5.78 2.72 Elemental analyzer 4/18 46.4 5.87 3.12 4/19 46.7 6.22 2.89 4/20 46.6 6.25 3.24 4/21 47.5 6.36 2.98 4/22 45.8 5.59 2.12

The decomposition apparatus equipped with the MBR system is composed of an inflow tank (anoxic tank) 241, a primary aeration tank 245, a secondary aeration tank (MBR tank) 246, a discharge tank (active carbon tank) 244. Condensate passed through the water separator was analyzed six times during the evaluation period for the condensed water and the treated water treated with this device. The test results are shown in [Table 10].

Condensate water and treated water test results (Unit: mg / L) Item division 4/15 4/18 4/19 4/20 4/21 4/22 Average % Removal BOD Condensate 577 631 710 660 518 736 638 99.7 Treated water 1.7 2.1 1.8 1.3 2.3 2.6 1.9 COD Mn Condensate 364 410 436 416 344 458 404 96.4 Treated water 17.2 16.6 15.2 11.2 15.0 13.5 14.7 Suspended solids Condensate 55.0 61.2 66.8 60.3 52.1 65.9 60.2 98.8 Treated water 0.8 0.7 0.7 0.8 0.6 0.8 0.7 Cl ^- Condensate 3.54 2.90 2.99 2.12 2.04 8.67 Treated water 3.94 3.39 3.14 2.99 2.92 2.03 MLSS Aeration tank 2600 2140 2220 2666 2390 2250 2,377 - MBR Group 3230 4260 4270 4330 4190 3850 4,021 MLVSS Aeration tank 1980 1690 1770 1420 2270 1720 1,808 - MBR Group 2950 3510 3130 3580 3480 3470 3,353

Gas samples were collected in a Tedlar Bag about 2.0 m above ground using a Mini Volume Air Sampler. Odor analysis results inside and outside the reactor are shown in [Table 11].

Internal and External Odor Analysis Results (Unit: ppmv) division NH ₃ CH ₃ SH R-NH ₂ H ₂ S 4/20 4/21 4/22 4/20 4/21 4/22 4/20 4/21 4/22 4/20 4/21 4/22 Reactor inside 2 2 One ND ND ND 2 2 2 ND ND ND Out ND ND ND ND ND ND ND ND ND ND ND ND

Separation membrane applied to the decomposing device incorporating the MBR system is a flat membrane, the results of the characterization of the membrane are shown in Table 12 and Figures 15 to 17. The membrane material was analyzed by FT-IR and identified as poly (vinyl chloride) and chlorinated. Surface analysis using SEM was carried out at 3000 and 5000 magnification.

Membrane Characterization Results Item unit result material membrane - C-PVC Spacer - ABS frame - ABS Effective film area m ² 0.98 Diameter size Μm 0.25 Air permeation m ² / m ² / h 5.46 Pure water flux LMH, 1 kg / ㎠ 10,505 Temperature range ℃ 2 to 38 Pressure range cmHg -40 ～ 0 pH range - 2 to 10

According to the organic waste decomposition apparatus equipped with a flat membrane for condensate treatment according to the present invention, the organic waste is biologically decomposed using the aerobic fermentation reaction of microorganisms, and the flat membrane system is used to remove the odor of condensate and gas separated from the water separator during the process. And by a biological method, and finally converted into water and carbon dioxide gas, so that organic waste such as food waste can be completely decomposed and destroyed without environmental pollution.

And in the condensate treatment, as shown in the experimental results of the comparative example and the embodiment, compared to the decomposition device is not equipped with a flat membrane, when the leachate and water of food waste is treated in the decomposition device according to the present invention, BOD , COD Mn, suspended solids removal rate can be significantly improved.

Claims (2)

In organic waste decomposition apparatus equipped with a flat membrane for condensate treatment, The organic waste decomposition device Input device; Reactor (decomposition apparatus); A chiller (CHILLER) for cooling the steam generated by the treatment unit and converting the water into water; A water separator for separating water and gas generated by converting water vapor while passing through the cooling device; BIO FILTER (deodorizer) which converts the gas separated by the water separator into a harmless gas through which the odor component is decomposed and removed by passing through the microbial carrier; BOD control unit for biologically treating the water separated from the water separator; It consists of a blow blower and an external air automatic control device that automatically injects fresh air into the device during suction operation. The reactor (decomposition device) of the organic waste decomposition device is An agitating device for mixing the injected organic waste with the aerobic high temperature fermentation microorganism in the apparatus while repeating the forward and reverse rotations; A blower that supplies compressed air to the inside of the reactor from the lower part of the reactor and supplies air for the aerobic high temperature fermentation microorganisms to work; Body heater to heat the reaction tank (TRACE HEATER); A heating device that warms the air blown to promote the activity of the aerobic high-temperature fermentation microorganisms; A temperature sensing device for controlling a heater and a blower by sensing a temperature inside the reactor; It consists of a discharge device which discharges the treated material inside the device to the outside, BOD control device of the organic waste decomposition device is Decomposition of organic wastes equipped with a flat membrane for condensate treatment, comprising an inflow tank (anoxic tank), a primary aeration tank, a secondary aeration tank (MBR tank) with an immersion flat membrane introducing the MBR method, and a discharge tank (active carbon tank) Device. A method for decomposing organic waste using an organic waste decomposition apparatus equipped with a flat membrane for treating condensate according to claim 1.

Images