KR101472883B1 - High Efficiency Organic Waste Treatment System - Google Patents

Abstract

The present invention relates to an apparatus for treating organic waste. More specifically, disclosed is a technical field pertaining to a highly efficient apparatus for treating organic waste, in which organic waste such as sewage sludge, livestock excreta, food waste, and organic municipal solid-waste is converted into dissolved materials easily decomposed by using an ultrasonic wave, and then treated by reacting the dissolved materials with anaerobic bacteria; and furthermore, very low precipitable digested sludge can be more efficiently treated, maintenance of each treatment bath is easy, and the leakage of a microbe and a solid matter can be efficiently prevented. Also, in the highly efficient apparatus for treating the organic waste according to the present invention, since a rotary ultrasonic wave treatment bath is used in treating sludge, a noise does not occur, manufacturing costs are reduced, organic wastes are converted into dissolved materials, and then are treated through an anaerobic digestion method. Thus, a treatment period can be reduced, and treatment efficiency can be improved. Since a separation membrane bath is separately installed, very low precipitable digested sludge can be more efficiently treated to prevent the leakage of a microbe and a solid matter, and make it easy to maintain each treatment bath.

Description

TECHNICAL FIELD [0001] The present invention relates to a high-efficiency organic waste treatment system,

The present invention relates to an apparatus for treating organic wastes, and more particularly, to an apparatus for treating organic wastes, which comprises dissolving organic wastes such as sewage sludge, livestock manure, food wastes and organic municipal solid wastes using ultrasonic waves, A highly efficient organic waste disposal apparatus capable of efficiently treating digestion sludge and the like having extremely low sedimentation ability, facilitating the maintenance of each treatment tank, and effectively preventing the outflow of microorganisms and solids .

Generally, organic wastes such as sewage sludge, livestock waste, food wastes and organic municipal solid wastes contain high concentrations of pollutants and are regarded as the main pollutants of water quality. Such organic wastes are treated by landfilling, fertilizing, incineration, Marine dumping, etc. Recently, marine dumping method has been used as the most representative treatment method.

However, due to the lack of landfills and the possibility of secondary pollutants coming into the water system, there is a growing negative awareness of landfilling of organic wastes. In accordance with the London Convention, marine dumping methods have been banned since 2012, It is being treated by an anaerobic digestion process. In this activated sludge process, the biodegradable organic material is converted into carbon dioxide, which is an inorganic material, and is removed. However, a part of the biodegradable organic material is converted into surplus microorganisms by microbial growth and accumulated in the form of sludge.

In the activated sludge process, aerobic processes such as aerobic processes such as bioxidation, composting, liquefying, and feed conversion have high energy consumption, and compost and liquid fertilizer, which is the final by-product, are difficult to secure sales points. There was a problem.

Therefore, the anaerobic digestion process has recently been widely applied to produce energy and at the same time to secure water quality. This anaerobic process can convert high-concentration organic matter into biogas and use it as an energy source. Water quality control is possible.

In addition, the anaerobic process is a biological process in which organic matter in organic waste (hereinafter referred to as 'sludge') is decomposed by anaerobic microorganisms and carbon dioxide and methane gas are produced as final byproducts. The amount of sludge generated by the anaerobic digestion process is reduced Therefore, it has been recognized that the sludge treatment cost is reduced, the odor generating material is reduced, the pathogenic bacteria are killed, and the energy consumption is remarkably lower than that of the aerobic treatment method, thereby being an efficient sludge treatment process capable of reducing the operating cost.

However, regarding the treatment and disposal of sludge, anaerobic digestion of the excess sludge does not occur rapidly and hydraulic retention time (HRT) of 20 days or more is required, and it is difficult to dehydrate after anaerobic digestion of the sludge The problem is that most of the sludge is composed of a mass of organic microorganisms, so that the cell walls of these organic microorganisms block the delivery of the organic substances into the anaerobic digesting matrix. In other words, the cytoplasm composed of a large amount of organic material can not be used for anaerobic digestion due to the cell wall, which is a solid structure surrounding the cells, and thus exhibits a low digestion efficiency upon anaerobic digestion of the sludge.

Prior to the biological stabilization process of the sludge, particularly the stabilization process by anaerobic digestion, the sludge is pretreated to improve the low digestion efficiency of such sludge. Sludge pretreatment generally involves a single treatment such as physical, chemical, and biological methods such as ozone treatment, ultrasonic treatment, alkali treatment, heat treatment, enzyme treatment, acid treatment, mechanical grinding, chlorination, and alkali / And the like, and the basic function of this pretreatment method is to dissolve the organic material by destroying the cell wall, which is referred to as " solubilization ".

Among various sludge pretreatment methods as described above, a lot of research has been conducted at present, and a widely commercialized method is a sludge pretreatment method using ultrasonic waves. Ultrasound generally refers to a frequency region of 16 kHz or more, which is human auditory area, kHz range, and 1 ~ 10 MHz dml high frequency. They are different in commercial use and exhibit various phenomena depending on the state of the target medium (gas, liquid, solid). When ultrasonic waves pass through the medium, especially liquid, bubbles are generated by acoustic pressure, which is called cavitation. When the bubble reaches the critical point, it bounces and repeats bubble generation and extinction. As the pressure and temperature rise locally, high-temperature and high-pressure gases are instantaneously released and oxidative substances such as thermal decomposition and OH radical are generated In addition, it is known that the intermolecular collision caused by the shock wave generated when the bubbles collapse can increase the reaction rate in various chemical reactions.

That is, it is a technology using an instantaneous high-temperature and high-pressure condition due to breakage of cavities and bubbles generated in the liquid by cavitation and destruction of surrounding sludge by shock wave and shear force. In other words, when irradiating ultrasonic waves having high acoustic intensity, if the energy input by ultrasonic waves exceeds the binding energy of water molecules, a partial pressure drop causes cavitation.

These ultrasonic techniques have the advantages of high sludge treatment efficiency, relatively low influence of solids content and viscosity, but high energy input and high facility maintenance cost.

Prior art for solubilizing sludge using ultrasonic technology is disclosed in Korean Patent Publication No. 2006-0023383 entitled " Method for Pretreatment of Sludge Using Dual Frequency Ultrasonic "for Pre-treating Sludge Using Dual Frequency Ultrasound in Anaerobic Digestion Process of Sludge And a method for solubilizing sludge generated in a sewage treatment plant, specifically, a multi-wavelength ultrasonic wave irradiation and a multi-stage ultrasonic wave irradiation for microbial sludge generated in a sewage, wastewater or sewage treatment plant, Korean Patent Laid-Open Publication No. 2005-0011391, entitled " Method for Solubilizing Sludge Used and Multi-stage Reflux Ultrasonic Irradiation Apparatus therefor ", and an anaerobic digestion tank for digesting organic wastes. An ultrasound By installing a vibrator, granule An anaerobic digester with an ultrasonic vibrator capable of preventing the compaction of the sludge layer and increasing the activity of the methane gas-producing bacteria to increase the biogas production amount.

However, since the apparatus and method for solubilizing the sludge using the conventional ultrasonic wave as described above are used by attaching the ultrasonic vibrator to the outer wall of the apparatus, the ultrasonic vibrator to be attached increases exponentially as the treatment vessel capacity increases, There is a problem that the size increases, and there is a problem that an additional noise preventing device must be installed since serious noise may be generated due to transmission through the external wall or the provision of the exposed ultrasonic vibration.

In connection with the above, the anaerobic process separates the carbon dioxide and methane gas (hereinafter referred to as "biogas") and solid sludge generated in the anaerobic process using a liquid and a gas-liquid separation pipe, Low digestion sludge and the like can not be efficiently treated, so that digested sludge or the like is mixed with the treated water generated from the sludge having a high liquid and gas-liquid separation, and the digested sludge must be purified again in the purification facility.

In addition, since the anaerobic process is required to periodically wash the drug from the outside in order to prevent clogging, it is troublesome to separately install a drug feeder and the like, and since the membrane used in the high-liquid and gas-liquid separation pipe is always immersed in water, The complexity of the anaerobic digestion tank is problematic in that it is difficult to maintain the anaerobic process equipment when the anaerobic process equipment is defective. In addition, the anaerobic process has been complicated and variously supplemented for efficient sludge treatment, but it also has a problem that the capacity to be treated is smaller than the facility scale.

Korean Patent No. 10-0780384 Korean Patent No. 10-1191032 Korean Patent No. 10-1227556

Disclosure of Invention Technical Problem [8] The present invention has been made in order to solve the above-mentioned problems in the prior art, and it is an object of the present invention to provide a sludge- The ultrasonic wave can be irradiated more efficiently because it is guided to the periphery of the ultrasonic vibrating part by rotation, and it is possible to treat the digesting sludge and the like having a very low sedimentation efficiency more efficiently by providing a separation membrane tank separately, And an object of the present invention is to provide a highly efficient organic waste disposal apparatus which can easily prevent the outflow of microorganisms and solids.

In order to achieve the above object, the present invention provides a method of treating organic wastes, including: a storage tank (100) for storing organic wastes; an ultrasonic treatment tank (200) for receiving organic wastes from the storage tank (100) An anaerobic digestion tank 300 for receiving the organic waste decomposed in the anaerobic digestion unit 200 and extracting methane gas and treated water; And a separation membrane tank 400 for receiving treatment water from the anaerobic digestion tank 300 and performing solid-liquid separation, and an inlet pipe 10 for supplying the organic waste of the storage tank 100 to the ultrasonic treatment tank 200; And a recovery pipe 20 for recovering organic wastes exceeding the maximum water level 240 of the ultrasonic treatment tank 200 to the storage tank 100 and the organic waste decomposed in the ultrasonic treatment tank 200 into the anaerobic digestion tank 300, A transfer pipe 20 for supplying the transfer gas to the reactor; And an effluent pipe (30) for discharging biodegraded organic waste in the anaerobic digestion tank (300) to the separation membrane tank (400).

The storage tank 100 of the present invention includes a body 110 into which organic waste flows and is filled therein, a stirring shaft 122 having a plurality of stirring vanes 123 inside the body 110, A stirrer 120 including an agitating motor 124 installed at an upper portion of the agitator 110 to activate the organic waste; And an inflow pump 130 for supplying the organic waste to the ultrasonic treatment tank 200. The ultrasonic treatment tank 200 includes a body to be filled with organic wastes of the storage tank 100, And an agitating motor 224 installed on the upper part of the body 210. The agitating motor 222 is disposed in the main body 210 so as to decompose organic wastes, An ultrasonic vibrator 230 installed inside at least one of the stirring shaft 222 and the stirring blade 223; And a chemical feeder 290 for adjusting the pH of the organic waste.

The anaerobic digester 300 of the present invention includes a body 310 into which the organic waste of the ultrasonic treatment tank 200 is introduced and filled therein and a plurality of stirring blades 323 provided inside the body 310 An agitator 320 for agitating organic wastes and including a stirring shaft 322 and a stirring motor 324 installed on an upper portion of the body 310; A sample collecting port 330 for collecting the sample; A dissolved oxygen amount measuring device 350, a temperature sensor 360 and a temperature holding means 361 in the interior of the body 310. The separation membrane tank 400 is connected to the anaerobic digester A first PE tank 410 having a first conveyance pipe 412 having a pump 413 and a first PE tank 410 connected to the first conveyance pipe 412, A separation tank 420 having a plurality of solid-liquid separation pipes 422 for separating solid and liquid from the treated water and having a second transfer pipe 424 provided with a pump 425, ; And a second PE tank 430 connected to the second transfer pipe 424 to discharge the liquid to the purification facility by receiving the liquid from the separation tank 420. The second PE tank 430 Further comprises a recovery pipe (432) for recovering the liquid to the separation tank (420) when it is determined that the solid-liquid separation is not performed in the separation tank (420).

The above-described highly efficient organic waste disposal apparatus according to the present invention uses a rotary ultrasonic treatment tank to treat sludge, thereby reducing noise, reducing manufacturing cost, converting it into a soluble substance that is easy to disassemble, The treatment period can be shortened and the treatment efficiency can be increased and the separation membrane tank can be installed separately to effectively treat the digestion sludge and the like having a very low sedimentation ability to effectively prevent the outflow of microorganisms and solids And the maintenance of each treatment tank can be facilitated.

Brief Description of the Drawings Fig. 1 is a schematic view showing an overall structure of a high efficiency organic waste disposal apparatus according to a preferred embodiment of the present invention. Fig.
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001]
3 is a view showing a storage tank according to a preferred embodiment of the present invention.
4 is a configuration diagram showing an ultrasonic treatment tank according to a preferred embodiment of the present invention.
5 is an explanatory view of the state of use of the ultrasonic treatment tank according to the preferred embodiment of the present invention.
6 is a block diagram of an ultrasonic treatment tank and an anaerobic digestion tank according to a preferred embodiment of the present invention.
FIG. 7 is a view showing an anaerobic digestion tank according to a preferred embodiment of the present invention. FIG.
FIG. 8 is a schematic view showing an anaerobic digester and a membrane separation tank according to a preferred embodiment of the present invention. FIG.
FIG. 9 is a view showing a separation membrane bath according to a preferred embodiment of the present invention. FIG.
10 is an enlarged view of a separation tank according to a preferred embodiment of the present invention.

The present invention relates to an apparatus for treating organic wastes, and more particularly, to an organic wastes treatment apparatus (hereinafter, referred to as 'sludge 500') such as sewage sludge, livestock manure, food waste and organic municipal solid waste. Was treated with anaerobic bacterium after dissolvable and easily dissolvable by means of a rotary ultrasonic treatment tank. Separate membrane tanks were installed separately to facilitate the maintenance of each treatment tank and to set fire extinguishing sludge Can be efficiently treated, and can effectively prevent the outflow of microorganisms and solids.

The present invention relates to an organic waste disposal apparatus and a method of disposing sludge in an ultrasonic treatment tank 200. The sludge decomposition apparatus 200 includes a storage tank 100 for storing organic wastes, that is, sludge, an ultrasonic treatment tank 200 for decomposing organic wastes by receiving sludge from the storage tank 100, An anaerobic digestion tank 300 for receiving methane gas and treated water; And a separation membrane tank (400) for receiving treatment water from the anaerobic digestion tank (300) and performing solid - liquid separation.

The present invention also relates to a method for recovering sludge in a storage tank 100 to an ultrasonic treatment tank 200 and recovering sludge exceeding a maximum water level 240 of the ultrasonic treatment tank 200 to a storage tank 100 A transfer pipe 20 for supplying sludge decomposed in the ultrasonic treatment tank 200 to the anaerobic digestion tank 300; And an outflow pipe 30 for discharging the sludge biodegraded in the anaerobic digestion tank 300 to the separation membrane tank 400. The treatment vessels are connected to each other to transfer and discharge the sludge .

Hereinafter, the present invention will be described in detail with reference to the drawings 1 to 10 showing embodiments of the present invention.

Specifically, the reservoir 100 of the present invention comprises

A stirring shaft 122 provided with a plurality of stirring vanes 123 in the body 100 and a stirring shaft 122 provided in the upper part of the body 110. The stirring shaft 122 is provided inside the body 100, And an inflow pump 130 for supplying the sludge 500 to the ultrasonic treatment tank 200. The body 110 includes a body 110, The sludge 500 stored in the sludge tank 500 is stirred using the stirrer 120 to prevent the sludge 500 from being solidified and the sludge 500 is primarily decomposed by the microorganisms.

The storage tank 100 is provided with an inflow pump 130 at an outer side thereof to supply the sludge 500 to the ultrasonic treatment tank 200 to be described later. At this time, the inflow pump 130 is connected to the inflow pipe 10 A circulation pipe (not shown) is connected to the ultrasonic treatment tank 200 to supply the sludge 500 and to supply the sludge 500 in the upper part of the storage tank 100 to the ultrasonic treatment tank 200 .

That is, since the state of the upper part of the sludge 500, which is stirred in the storage tank 100, maintains most of the state of the liquid than the lower part of the circulation pipe, the circulation pipe can be more effectively treated by the ultrasonic treatment in the ultrasonic treatment tank 200 So that the sludge 500 can be efficiently decomposed in the overall process.

The storage tank 100 is connected to the recovery pipe 12 so that the sludge 500 exceeding the maximum water level 240 of the ultrasonic treatment tank 200 can be introduced into the storage tank 100 again, So that the amount of sludge 500 that can be efficiently ultrasonically treated can be maintained.

Next, in the ultrasonic treatment apparatus 200 of the present invention,

The sludge 500 of the storage tank 100 is supplied to decompose the organic waste and the sludge 500 of the storage tank 100 is introduced into the body 210 to be filled therein. An agitator 220 which includes an agitating shaft 222 provided with a blade 223 and a stirring motor 224 installed on the upper part of the body 210 to mix the organic waste and a stirring shaft 222 or a stirring blade 222, The ultrasonic vibrator 230 installed in at least one of the first and second chambers 223, and the chemical injector 290 for adjusting the pH of the organic waste. At this time, the chemical injector 290 is composed of a chemical reservoir (not shown) and a pump (not shown), and a pH adjusting agent is injected to maintain the proper pH of the sludge 500 if necessary.

Specifically, the body 210 is filled with the sludge 500 and filled therein. The body 210 includes an inlet 260 through which the sludge 500 flows, an outlet 262 through which the concentrated concentrated sludge 510 is dissolved, And a recovery port 261 for recovering the sludge 500 to the storage tank 100 when the temperature of the sludge 500 exceeds the maximum water level 240. The inlet 260, the discharge port 262, and the recovery port 261 The inlet pipe 10 and the return pipe 12 are connected to the storage tank 100 and the transfer pipe 12 is connected to the inlet pipe 10, 20 are connected to the anaerobic digester 300 to be described below, and the concentrated sludge 500 is moved.

At this time, the body 210 is positioned at a predetermined height by the support frame 270, and the discharge port 262 is installed in the lower part of the body 210, and the concentrated sludge 510 concentrated therein is naturally supplied to the anaerobic digestion tank 300 So that the discharged or withdrawal port 261 is located above the storage tank 100 and can be recovered to the storage tank 100 naturally.

The collecting port 12 is installed at a height enough to efficiently irradiate the ultrasonic wave by the ultrasonic transducer 230 provided on the stirring shaft 222 of the stirrer 220 to be described later and is connected to the ultrasonic transducer 230 The sludge 500 is moved back to the storage tank 100 through the collection port 12 when the sludge 500 flows into the storage tank 100 at a maximum water level 240 or more.

The body 210 further includes a cover 250 that can be opened and closed at an upper portion of the body 210. The body 210 is used for maintenance of the interior of the ultrasonic treatment apparatus 200, A drain valve 280 is provided outside the lower portion of the body 210 to allow the sludge 500 to be discharged to the outside during maintenance of the body 210.

The stirrer 220 includes a stirring motor 224 installed on the upper part of the body 210 and a stirring shaft 222 provided inside the body 210 to rotate the sludge 500 inside the body 210. [ And further includes a plurality of stirring vanes 223 provided on the stirring shaft 222 for stirring the sludge 500 as the stirring shaft 222 is rotated by the stirring motor 224, A slip ring 234 is provided on the upper part of the stirring shaft 222 to prevent the electric wire 232 connected to the ultrasonic transducer 230 to be described later from being twisted by the rotation of the stirring shaft 222 .

That is, the stirrer 220 rotates the sludge 500 filled in the body 210 using the stirring shaft 222 and the stirring vane 223, and the sludge 500 is rotated by the ultrasonic vibrator 230, So that the cells are destroyed.

The ultrasonic transducer 230 is installed inside the stirring shaft 222. The ultrasonic vibrator 230 irradiates ultrasonic waves to the sludge 500 rotated and circulated by the stirrer 220 to break the cells, And a plurality of ultrasonic transducers 32 are provided in the front and rear sides of the housing.

That is, the ultrasonic transducer 230 irradiates the generated ultrasonic waves to the sludge 500. A plurality of pairs of the ultrasonic transducers 230 are provided in front of and behind the stirring shaft 222 to rotate the stirring shaft 222 Thereby realizing an effect of efficiently irradiating the sludge 500 with ultrasonic waves.

In addition, the ultrasonic transducer 230 may be attached to the outer wall of the apparatus in the above-described configuration, or may be installed on the upper part of the sludge 100 to provide a smaller amount of ultrasonic vibrator 230 than the ultrasonic transducer 230, The manufacturing cost is reduced because the ultrasonic wave is irradiated to the sludge 500 more efficiently by using the syringe 500 and the sludge 500 is circulated by the stirring shaft 222, The ultrasonic waves can be uniformly irradiated onto the substrate 500.

Since the ultrasonic transducer 230 is installed in the liquid phase of the sludge 500 filled in the inside of the apparatus, that is, the body 210, the ultrasonic transducer 230 is installed on the outer wall and has less noise than the ultrasonic wave, The size of the stirring shaft 222 and the number of the ultrasonic transducers 230 provided inside the stirring shaft 222 can be increased even when the capacity of the body 200 is increased, .

The ultrasonic vibrator 230 of the present invention may be installed inside the stirring shaft 222 or may be additionally installed inside the stirring blade 223 to irradiate the ultrasonic wave to the sludge 500 more efficiently . In other words, the ultrasonic transducer 230 is installed in at least one of the stirring shaft 222 and the stirring vane 223. At this time, the ultrasonic transducer 230 is rotated along the stirring vane 223, It is preferable that a slip ring 234 is additionally provided to the ultrasonic transducer 230 installed in the stirring blade 223 to prevent twisting.

That is, the ultrasonic transducer 230 is connected to an ultrasonic vibration unit (not shown) provided separately or externally of the ultrasonic wave processing vessel 200 to control the vibration frequency and the output of the ultrasonic wave, It is preferable to prevent the wire 232 from being twisted even if the stirring shaft 222 is rotated. It is preferable that the oscillation frequency of the ultrasonic wave is 20 KHz or more. This is because the capacity of the ultrasonic wave treatment vessel 200, It will be apparent that various changes can be made in accordance with the judgment of a person skilled in the art in consideration of the number of the vibrators 230.

The transfer pipe 20 connected to the ultrasonic treatment tank 200 is connected to the anaerobic digester 300 at a higher level than the maximum level 312 of the concentrated sludge 510 filled in the anaerobic digestion tank 300, The concentrated sludge 510 of the ultrasonic treatment tank 200 can be naturally conveyed to the anaerobic digestion tank 300 without the feed pump 22 being installed, The transfer pump 22 is further provided to transfer the concentrated sludge 510 of the ultrasonic treatment tank 200 to the anaerobic digestion tank 300.

That is, the transfer pipe 20 is connected to at least one of the upper side and the lower side of the anaerobic digestion tank 300. When the concentrated sludge 510 is already filled in the anaerobic digestion tank 300, The transfer of the concentrated sludge 510 is more efficient and effective when the concentrated sludge 510 is stirred and decomposed, and the concentrated sludge 510 is naturally transferred to the upper side. However, considering the time and speed of stirring in the anaerobic digestion tank 300, it will be apparent to those skilled in the art that any one of them may be selectively used.

Next, the anaerobic digestion tank 300 of the present invention

The concentrated waste sludge 510 is supplied to the decomposed sludge 500 in the ultrasound treatment tank 200 to extract methane gas and treated water. The organic waste of the ultrasound treatment tank 200 flows into the sludge 500, A stirring shaft 322 having a plurality of stirring vanes 323 and a stirring motor 324 installed at an upper portion of the body 310 in the body 310 to be filled, A stirrer 320 for biodegrading the waste and a sample collecting port 330 for collecting the organic waste in a predetermined area on the outer surface of the body 210 and a pH meter 340 in the body 310, A measuring device 350, a temperature sensor 360, and temperature holding means.

At this time, carbon dioxide is also generated in the concentrated sludge 510. The generated carbon dioxide and methane gas are called biogas.

That is, conventionally, the biogas, treated water, and solids generated in the anaerobic digestion tank are separated and discharged into the gas storage tank and the treated water storage tank by the separation membrane provided in the separation liquid of the high liquid and the gas liquid. However, the anaerobic digestion tank 300 of the present invention The amount of concentrated sludge 510 supplied from the ultrasonic treatment tank 200 as a pretreatment step is controlled so as to maintain the water level 312 so that the biogas can be discharged naturally over the maximum water level 312.

At this time, a gas collector 380 is connected to collect the biogas discharged naturally, and when the biogas is collected in the gas collector 380 in a saturated state, the biogas can be supplied to the energizing facility 381 or the like A pressure valve 370 and a discharge pipe (not shown) may be further installed in the pipeline between the anaerobic digester 300 and the gas collector 380 so that the biogas can be connected to the atmosphere or discharged to the atmosphere as needed. Further, a gas flow meter 390 may be provided to measure the amount of biogas supplied to the energizing facility 381 or released to the atmosphere.

The gas collector 380 is connected to collect the biogas discharged naturally and the pressure valve 370 is connected to the anaerobic digester 300 so that the biogas can be discharged to the atmosphere when the biogas is collected in the saturated state in the gas collector 380. [ And the gas collector 380, as shown in FIG. Further, a gas flow meter 390 may be further provided to measure the amount of biogas released to the atmosphere by the pressure valve 370.

A sample collection port 330 is provided at a predetermined location on the outer surface of the anaerobic digestion tank 300 so as to collect the concentrated sludge 510 inside the body 210 to collect the concentrated sludge 510 inside the anaerobic digestion tank 300, A pH meter 340, a dissolved oxygen meter 350, a temperature sensor 360 and a temperature holding means 361 are installed in the body 310 to adjust the pH of the concentrated sludge 510 The dissolved oxygen amount and the temperature of the anaerobic digestion tank 300 can be measured and data for controlling the operation time and the stirring speed of the anaerobic digestion tank 300 can be provided.

The concentrated sludge 510 in the anaerobic digestion tank 300 can be maintained at a temperature of 30 ° C to 40 ° C by using the temperature sensor 360 and the temperature holding means 361, So that it can be efficiently decomposed. At this time, at least one of a heating cable, that is, a heating wire using electricity, a hot water purification pipe, and a hot plate is wound and installed on the outer peripheral surface of the anaerobic digestion tank 300 to maintain the internal temperature of the anaerobic digestion tank 300 (Not shown) is further provided on the outer peripheral surface of the anaerobic digestion tank 300 in which the temperature holding means 361 is wound and installed in order to prevent heat loss of the temperature holding means 361 Do.

The temperature holding means 361 may be buried in the body 310 of the anaerobic digestion tank 300 to prevent heat loss of the temperature holding means 361 and to reduce manufacturing costs.

In connection with the above, the anaerobic digestion tank 300 is provided with a discharge pipe 40 for discharging the concentrated sludge 510 inside the body 310 to a predetermined portion of the lower outer circumferential surface of the body 310 during maintenance .

Next, the separation membrane tank 400 of the present invention

The first PE tank 412 having the first transfer pipe 412 in which the treated water of the anaerobic digestion tank 300 is introduced and the pump 413 is installed is provided for separating solid and liquid from the anaerobic digestion tank 300, A plurality of solid-liquid separation pipes 422 connected to the first transfer pipe 412 to receive the treated water of the first PE tank 410 and to separate solid and liquid from the treated water, A separation tank 420 having a second transfer pipe 424 provided with a pump 425; And a second PE tank 430 connected to the second transfer pipe 424 to discharge the liquid to the purification facility by receiving the liquid from the separation tank 420. The second PE tank 430 (432) for recovering the liquid to the separation tank (420) when it is determined that the solid-liquid separation is not performed in the separation tank (420).

That is, since the treated water supplied from the anaerobic digestion tank 300 may contain the sludge 500 of solids other than the biogas, the separation membrane tank 400 may be subjected to solid-liquid separation to transfer the liquid to the purification facility, Are classified separately and incinerated and sold. This is because most of the sludge 500 is decomposed in the ultrasonic treatment tank 200 and the anaerobic digestion tank 300, thereby realizing the effect of purifying the treated water more efficiently in the purification facility.

At this time, the first PE tank 410 collects the treated water introduced from the anaerobic digestion tank 300, collects the sludge 500 through the collection port 414, and separates the treated water through the first transfer pipe 412 To the tank (420).

Next, the treated water transferred to the separation tank 420 is separated through the solid-liquid separation pipe 422, and is filtered through the collection port 429 to filter out the solid-form sludge 500 by the secondary precipitation, And transfers the treated water to the second PE tank 430 through the second transfer pipe 424. At this time, the separation tank 420 is installed at the lower part of the solid-liquid separation pipe 422 of the separation tank 420 and the blower 422 installed at the outside of the separation tank 420, and the dry air supplied from the blower 422 And a drying unit 426 including a spraying unit 424 for spraying solid matter and drying the solid separated from the solid-liquid separation pipe 422 so as to collect the sludge 500 more efficiently do.

Next, the treated water transferred to the second PE tank 430 is thirdly precipitated, the sludge 500 is collected through the collecting port 434, and the treated water trapped by the third set is discharged to the discharge pipe 440 To the purification facility. At this time, if it is determined that the solid sludge 500 is too much, it is conveyed to the separation tank 420 through the recovery pipe 432 to perform solid-liquid separation.

In addition, the treated water of the second PE tank 430 can be recovered to the separation tank 420 by using the recovery pipe 432, so that the inside of the separation tank 420 can be self-cleaned.

That is, the separation membrane tank 400 of the present invention is installed in the anaerobic digestion tank and separately disposed and treated with the biogas discharged from the sludge 500 through the solid-liquid separator and the gas-liquid separation pipe, Thereby realizing an effect of more efficiently treating extremely low digestion sludge and the like.

In connection with the above, the organic wastes treatment apparatus of the present invention can easily add and change the design according to the increase in capacity of the ultrasonic treatment tank 200, the anaerobic digestion tank 300 and the separation membrane tank 400, As a result of analyzing the concentrated sludge 510 in the anaerobic digestion tank 300 according to the preferred embodiment, the alkalinity and pH were 1,400 to 1,900 mg / L and 7.4 to 7.6, respectively, It was confirmed that the anaerobic digestion process was efficiently decomposed without the input of the chemicals. However, as described above, when the pH of the sludge 500 is significantly high or low, that is, when the sludge 500 having strong acidity or strong alkalinity has a strong alkalinity, it is preferable to inject the medicine in the medicine injector 290 Do.

As a result of the experiment using anaerobic digestion and solid-liquid separation, the average biogas was 0.24 ㎥ / kg COD and the methane gas 0.16 ㎥ when the organic loading rate (OLR) was 2.14 kg / COD / / kg COD production yield and the methane content in the biogas were more than 80%.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It is possible to carry out various changes in the present invention.

10: inlet pipe 12: return pipe 20: transfer pipe
22: feed pump 30: outlet pipe 40: outlet pipe
100: Storage tank
110, 210, 310: Body 120, 220, 320:
122, 222, 322: stirring shafts 123, 223, 323:
124, 224, 324: stirring motor 130: inflow pump
200: ultrasonic treatment tank
230: ultrasonic transducer 232: wire
234: slip ring 240, 312: maximum water level
250: cover 260: inlet
261: collection port 262:
270: support frame 280: drain valve
290: Drug injector
300: anaerobic digester
330: Sampling point 340: pH meter
350: dissolved oxygen meter 360: temperature sensor
361: Temperature maintaining means 370: Pressure valve
380: Gas collector 381: Energy generating plant
390: Gas flow meter
400: separator tank
410: first PE tank 412: first transfer pipe
413, 425, 433: pumps 414, 429, 434:
420: separation tank 422: solid-liquid separation pipe
424: Second transfer pipe 426: Blower
427: jetting section 428: drying section
430: second PE tank 432: recovery pipe
440: Discharge tube
500: Organic waste (sludge)
510: Concentrated organic waste (concentrated sludge)

Claims (7)

A storage tank 100 for storing organic wastes;
An ultrasonic treatment tank 200 for receiving organic wastes from the storage tank 100 and decomposing the organic wastes;
An anaerobic digestion tank 300 for receiving the organic waste decomposed in the ultrasonic treatment tank 200 and extracting methane gas and treated water; And
And a separation membrane tank (400) for receiving treatment water from the anaerobic digestion tank (300) and performing solid - liquid separation,
The ultrasonic treatment apparatus 200 includes:
A body 210 into which the organic waste of the storage tank 100 flows and is filled therein;
A stirring shaft 222 having a plurality of stirring vanes 223 inside the body 210 and a stirring motor 224 installed on the upper part of the body 210 to stir the organic wastes 220 );Wow
An ultrasonic vibrator 230 installed inside at least one of the stirring shaft 222 and the stirring blade 223; And
And a chemical feeder (290) for adjusting the pH of the organic waste.
The method according to claim 1,
The high efficiency organic waste treatment apparatus
An inflow pipe 10 for supplying the organic waste of the storage tank 100 to the ultrasonic treatment tank 200;
A recovery pipe 12 for recovering organic wastes exceeding the maximum water level 240 of the ultrasonic treatment tank 200 to the storage tank 100;
A transfer pipe (20) for supplying the organic waste decomposed in the ultrasonic treatment tank (200) to the anaerobic digestion tank (300); And
And an outflow pipe (30) for discharging organic waste biodegraded in the anaerobic digestion tank (300) to the separation membrane tank (400).
The method according to claim 1,
The reservoir (100)
A body 110 into which the organic waste flows and is filled therein;
A stirrer 122 for stirring organic wastes and including a stirring shaft 122 having a plurality of stirring vanes 123 and a stirring motor 124 installed on an upper portion of the body 110, ); And
And an inflow pump (130) for supplying the organic waste to the ultrasonic treatment tank (200).
delete The method according to claim 1,
The anaerobic digestion tank (300)
A body 310 into which the organic waste of the ultrasonic treatment tank 200 flows and is filled therein;
A stirring shaft 322 having a plurality of stirring vanes 323 in the body 310 and a stirring motor 324 installed on the upper portion of the body 310. The agitator 320 for biodegrading organic wastes );Wow
A sample collecting port 330 for collecting organic waste in a predetermined area on the outer surface of the body 210; And
Wherein the apparatus further comprises a pH meter (340), a dissolved oxygen meter (350), a temperature sensor (360), and a temperature holding means in the body (310).
The method according to claim 1,
The separation membrane tanks 400
A first PE tank 410 having a first transfer pipe 412 into which the treated water of the anaerobic digestion tank 300 is introduced and a pump 413 is installed;
A plurality of solid-liquid separation pipes 422 connected to the first transfer pipe 412 to receive the treated water from the first PE tank 410 and separate solid and liquid from the treated water, and a pump 425 A separation tank 420 having a second transfer pipe 424 installed therein; And
And a second PE tank 430 connected to the second conveyance pipe 424 to receive the liquid from the separation tank 420 and discharge the liquid to the purification facility,
The second PE tank 430
Further comprising a recovery pipe (432) for recovering the liquid to the separation tank (420) when it is determined that the solid-liquid separation is not performed in the separation tank (420).
The method according to claim 6,
The separation tank (420)
A blower 426 installed outside the separating tank 420 and a jetting section 427 provided at a lower portion of the solid-liquid separating pipe 422 of the separating tank 420 to discharge dry air supplied from the blower 426 And a drying unit (428) configured to dry the solid separated from the solid-liquid separation pipe (422).

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