WO2021125698A1 - Dispositif de digestion anaérobie du type à cylindre vertical pour traitement de déchets organiques - Google Patents

Dispositif de digestion anaérobie du type à cylindre vertical pour traitement de déchets organiques Download PDF

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Publication number
WO2021125698A1
WO2021125698A1 PCT/KR2020/018126 KR2020018126W WO2021125698A1 WO 2021125698 A1 WO2021125698 A1 WO 2021125698A1 KR 2020018126 W KR2020018126 W KR 2020018126W WO 2021125698 A1 WO2021125698 A1 WO 2021125698A1
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Prior art keywords
organic waste
anaerobic digestion
vertical
anaerobic
anaerobic digester
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PCT/KR2020/018126
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English (en)
Korean (ko)
Inventor
김영호
이재명
김창영
성기현
최병철
김범석
이재철
안현정
이가영
이혜윤
김민준
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주식회사 케이이씨시스템
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Priority to CN202080077478.8A priority Critical patent/CN114761363A/zh
Publication of WO2021125698A1 publication Critical patent/WO2021125698A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/02—Biological treatment
    • C02F11/04—Anaerobic treatment; Production of methane by such processes
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
    • C02F11/127—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering by centrifugation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/28—Anaerobic digestion processes
    • C02F3/2866—Particular arrangements for anaerobic reactors

Definitions

  • the present invention relates to a vertical vertical anaerobic digestion apparatus for organic waste treatment, and more particularly, the undecomposed organic waste (sludge and contaminants) accumulated on the floor is transferred from the lower side to the upper side, and sufficient decomposition is achieved in the transport process. It relates to a vertical vertical anaerobic digestion system for organic waste treatment that can improve the decomposition efficiency and thus realize increased production of biogas.
  • wastewater such as sewage, sewage, and manure generated from households, livestock farms, and industrial sites contains a large amount of organic matter, and biological and chemical oxygen demand, suspended matter content, etc. If it is discharged without reaching the standard, the soil or water quality will be polluted.
  • Anaerobic digestion process which is one of these biological methods, is a reaction in which anaerobic microorganisms consume organic matter, decompose it, and release inorganic compounds and digestive gas (biogas).
  • the anaerobic digestion process is a traditional technology that has been established for a long time, also called “methane fermentation”, and the main purpose of the anaerobic digestion process is to recover energy called methane at the same time as organic waste treatment.
  • anaerobic digestion treatment is largely divided into pretreatment process, anaerobic digestion process, gas collection and refining process, and solid material recycling process. Most anaerobic digestion processes are applied to those with a solid content of less than 10%. It is also applicable to high-concentration organic waste with a solid content of around 25%.
  • Korean Patent Registration No. 10-1209132 horizontal anaerobic digestion apparatus for organic waste treatment
  • Korean Patent Registration No. 10-1209133 cylindrical anaerobic digestion apparatus for organic waste treatment
  • Republic of Korea registration Patent No. 10-2023639 high-rate dry anaerobic digestion system for high-concentration organic waste treatment
  • the present invention has been devised to solve the above problems, and by transferring undecomposed organic wastes (sludge and contaminants) accumulated on the floor from the bottom to the top so that sufficient decomposition is made in the transport process, the production efficiency of biogas is improved.
  • An object of the present invention is to provide a vertical anaerobic digestion system for organic waste treatment.
  • a perforated pipe installed in the longitudinal direction of the anaerobic digester to be positioned between the center and the inner circumferential surface of the anaerobic digester, the perforated pipe having a perforated surface on the outer circumferential surface to allow the organic waste to pass freely;
  • a stirrer for removing scum, destroying the oil layer, and stirring organic waste is further reinforced by being installed side by side in the upper and lower portions in a direction orthogonal to the anaerobic digester; characterized in that do.
  • the inner bottom of the anaerobic digester is formed to be inclined downward toward the lower end of the perforated pipe; characterized in that.
  • the upper end of the outer peripheral surface of the anaerobic digester is further provided with a reinforcing screw for collecting the float so that the float can be discharged to the outside.
  • a first pump for pressurizing the extinguishing liquid discharged through the upper outlet
  • centrifugal dehydrator for discharging the digested liquid pressurized by the first pump to a purification facility after centrifugation.
  • centrifugal dehydrator for separating the liquid phase by centrifuging the sediment pumped by the first pump
  • the interior of the anaerobic digester is characterized in that it is heated by a hot water pipe installed on the inner peripheral surface.
  • the present invention can induce the smooth discharge of biogas generated in the anaerobic digestion process as the agitator disposed side by side inside the anaerobic digestion tank removes scum and destroys the oil layer while stirring the organic waste, and of the anaerobic digester Since the transfer screw installed in the longitudinal direction can induce sufficient decomposition by contact with microorganisms in the process of transferring the organic waste from the lower side to the upper side, the decomposition efficiency of the undecomposed organic waste is improved, thereby reducing the production of biogas. be able to increase
  • organic waste and microorganisms freely pass through the hole in the perforated pipe and come into contact with each other, so it is possible to induce smooth decomposition of undecomposed organic waste, and thus This has the advantage of increasing productivity.
  • the sediment (sludge and impurities in organic waste) discharged through the first outlet is pumped to the centrifugal dehydrator through the first pump, and the pressurized sediment (sludge and impurities in organic waste) is centrifuged in the centrifugal dehydrator. After the liquid phase is pumped through the second pump and re-introduced into the anaerobic digester, it is possible to increase the production efficiency of biogas.
  • FIG. 1 is a view showing a first embodiment of a vertical vertical anaerobic digestion apparatus for organic waste treatment according to the present invention.
  • Figure 2 is a perspective view showing a separately extracted perforated pipe from the vertical anaerobic digestion apparatus for organic waste treatment according to the present invention.
  • Figure 3 is a plan view of a vertical vertical anaerobic digestion apparatus for organic waste treatment according to the present invention.
  • Figure 4 is a view showing a second embodiment of the vertical anaerobic digestion apparatus for organic waste treatment according to the present invention.
  • Figure 5 is a view showing a third embodiment of the vertical anaerobic digestion apparatus for organic waste treatment according to the present invention.
  • FIG. 6 is a graph measuring the methane generation efficiency of the vertical vertical anaerobic digestion apparatus for organic waste treatment according to the third embodiment of the present invention.
  • FIG. 1 is a view showing a first embodiment of a vertical anaerobic digestion apparatus for organic waste treatment according to the present invention
  • Figure 2 is a vertical vertical anaerobic digestion apparatus for organic waste treatment according to the present invention
  • a perforated pipe is separately It is an excerpted perspective view
  • FIG. 3 is a plan sectional view of a vertical vertical anaerobic digestion apparatus for organic waste treatment according to the present invention.
  • the vertical anaerobic digestion apparatus for organic waste treatment is composed of an anaerobic digestion tank 100, a perforated pipe 200, and a transfer screw 300, according to Technical characteristics that can improve decomposition efficiency and increase biogas production by transferring undecomposed organic wastes (sludge and contaminants) accumulated on the floor from the bottom to the top so that sufficient decomposition occurs during the transport process There is this.
  • the anaerobic digester 100 is made of metal or concrete, and includes a storage tank 110 and a cover 120 .
  • the storage bin 110 has a cylindrical shape, a space is provided therein so that organic waste can be accommodated, and the shape of the storage bin 110 may be modified in various known embodiments as necessary.
  • first discharge pipe 111 and a second discharge pipe 112 communicating with the internal space are formed on the outer peripheral surface of the lower end and the upper end of the reservoir 110, respectively, and the first discharge pipe 111 has a first discharge pipe ( A first valve V1 for opening and closing 111 is installed, and a second valve V2 for opening and closing the second discharge pipe 112 is installed in the second discharge pipe 112 .
  • the precipitated contaminants and sludge are discharged through the first discharge pipe 111
  • the digestive juice is discharged through the second discharge pipe 112 .
  • the cover 120 is disposed on the upper surface of the reservoir 110 and is coupled to the reservoir 110 through a fixing means (eg, a bolt and a nut) to close the upper portion of the reservoir 110 .
  • a fixing means eg, a bolt and a nut
  • An inlet 121 and a gas outlet 122 communicating with the internal space of the storage container 110 are formed on the upper surface of the cover 120, respectively, and organic waste is stored in the storage container 110 through the inlet 121. ), and biogas generated during the decomposition of organic waste is discharged through the gas outlet 122 .
  • the gas outlet 122 is connected to a gas storage tank (not shown) for storing biogas.
  • the perforated pipe 200 is a circular pipe, and in this embodiment, it is installed in the longitudinal direction of the reservoir 110 to be positioned between the center (vertical axis) and the inner circumferential surface of the reservoir 110.
  • a plurality of perforations 210 are formed on the outer circumferential surface of the perforated pipe 200 , and organic waste stored in the anaerobic digester 100 can freely pass through the perforated 210 .
  • an opening 220 opened to a predetermined size is formed to face each other, and to the upper end of the opening 220 opened to a predetermined size and the end of the second outlet 112 and A hole to be connected to communication is provided, and the organic waste deposited on the bottom of the reservoir 110 can be easily introduced and discharged through the opening 220 .
  • the inner bottom surface of the storage tank 110 is formed to be inclined downward toward the opening 220 of the perforated pipe 200 so that the organic waste deposited to the bottom can be smoothly introduced into the opening 220 of the perforated pipe 200 .
  • the transfer screw 300 is installed in the longitudinal direction of the perforated pipe 200 to transfer the organic waste from the lower side to the upper side so that the undecomposed organic waste can be decomposed in the process of being transferred. do.
  • the organic waste freely passes through the perforation 210 of the perforated pipe 200 and actively contacts each other, and thus the undecomposed organic waste is Since it can be more smoothly decomposed, there is an advantage in that biogas productivity is increased.
  • the agitator 400 installed side by side in the upper and lower portions in a direction orthogonal to the anaerobic digester 100 is further reinforced.
  • the agitator 400 disposed at the inner upper end of the anaerobic digester 100 serves to remove scum and agitate the organic waste
  • the agitator 400 disposed at the inner lower end of the anaerobic digester 100 is an oily layer (Oil layer) serves to destroy and agitate organic waste, and by the action of the agitator 400 as described above, it is possible to induce smooth discharge of biogas generated in the anaerobic digestion process.
  • the blades of the stirrer 400 have different sizes and form a predetermined angle, and when the stirrer 400 rotates, the anaerobic organic material is stirred by the blades and moves from right to left.
  • the inner peripheral surface of the anaerobic digester 100 is further provided with a hot water pipe 130 for internal heating, whereby the internal temperature of the anaerobic digester 100 is 36 °C ⁇ 40 °C is maintained as
  • the organic waste is mixed with waste vinyl, microplastic, etc. in addition to food waste and put into the air digestion tank 100.
  • waste vinyl or microplastic is not decomposed, and the biogas is discharged while floating on the surface. of course, as the waste vinyl is caught on the blades of the stirrer 400, it interferes with stirring and causes malfunction.
  • the upper outer peripheral surface of the storage bin 110 constituting the air-gas digestion tank 100 is provided in communication with the inside of the floating material collection screw 500 Reinforced did it
  • the waste vinyl or microplastic floating on the upper part is moved by the rotation of the agitator 400, and when it reaches the floating material collection screw 500 in the process of moving, it is moved by the floating material collection screw 500. discharged to the outside
  • the organic waste is input through the inlet 121 of the anaerobic digester 100 .
  • hot water is supplied through the hot water pipe 130 of the anaerobic digester 100, and the internal temperature is operated under the condition of 36° C. to 40° C., and the residence time is 40 days depending on the type and concentration of organic waste.
  • the agitator 400 arranged side by side inside the anaerobic digester 100 removes scum and destroys the oil layer while stirring the organic waste.
  • the sludge or contaminants among the organic wastes injected into the anaerobic digester 100 are guided by the inclined bottom surface of the anaerobic digester 100 and are put into the transfer screw 300 built into the perforated pipe 200, The transfer screw 300 transfers the sludge or contaminants from the lower side to the upper side.
  • the organic waste is put in a state in which waste vinyl or microplastics are mixed together, and the waste vinyl or microplastics put in in this way floats inside the anaerobic digester 100, and is moved by the rotation of the stirrer 400.
  • the floating material collection screw 500 In the process of moving, when it reaches the floating material collection screw 500, it is moved by the floating material collection screw 500 and discharged to the outside.
  • the floating material collection screw 500 discharges and removes waste vinyl or microplastics that are not conducive to the production of biogas to the outside, thereby increasing the productivity of biogas.
  • the biogas generated inside the anaerobic digester 100 is discharged through the gas outlet 122 and stored in a gas storage tank (not shown).
  • sludge or contaminants among organic wastes that are no longer decomposed in the anaerobic digester 100 are discharged through the first discharge pipe 111 , and the digestion liquid is discharged through the second discharge pipe 112 .
  • the present invention is to induce the smooth discharge of biogas generated in the anaerobic digestion process as the stirrer 400 arranged side by side inside the anaerobic digestion tank 100 removes scum and destroys the oil layer while stirring the organic waste. Since the transfer screw 300 installed in the longitudinal direction of the anaerobic digester 100 can induce sufficient decomposition by contact with microorganisms in the process of transferring the organic waste from the lower side to the upper side, the undecomposed organic matter It is possible to increase the production of biogas by improving the decomposition efficiency of waste.
  • the organic waste and the microorganism freely pass through the hole 210 of the perforated pipe 200 and come into contact with each other, thereby inducing the smooth decomposition of the undecomposed organic waste. This can be done, and thus there is an advantage in that the productivity of biogas can be increased.
  • FIG. 3 is a view showing a second embodiment of the vertical anaerobic digestion apparatus for organic waste treatment according to the present invention, which will be described with reference to the following.
  • the second embodiment is generally the same as the first embodiment, except that the first pump P1 and the centrifugal dehydrator 600 are further reinforced in the configuration of the first embodiment.
  • the first pump P1 serves to pressurize the digestive fluid discharged through the upper outlet, that is, the second outlet 112 to the centrifugal dehydrator 600 .
  • the centrifugal dehydrator 600 serves to centrifuge the digestive fluid pumped by the first pump P1 and discharge it to the purification facility.
  • FIG. 4 is a view showing a third embodiment of the vertical anaerobic digestion apparatus for organic waste treatment according to the present invention, which will be described with reference to the following.
  • the third embodiment is generally the same as the first embodiment, except that the first pump P1, the centrifugal dehydrator 600, and the second pump P2 are further reinforced in the configuration of the first embodiment.
  • the first pump P1 serves to pressurize the sediment (sludge and impurities among organic wastes) discharged through the lower outlet, that is, the first discharge pipe 111 to the centrifugal dehydrator 600 .
  • the centrifugal dehydrator 600 serves to centrifuge the sediment (sludge and contaminants among organic wastes) pumped by the first pump P1 to separate the liquid phase.
  • the second pump (P2) serves to pump the liquid separated from the centrifugal dehydrator (600) and return it to the inlet (121).
  • the sediment (sludge and contaminants in organic waste) discharged through the first outlet 111 is pumped to the centrifugal dehydrator 600 through the first pump P1, and the pressurized sediment (sludge and contaminants in organic waste) Contaminants) is centrifuged in the centrifugal dehydrator 600, and then the liquid phase is pumped through the second pump P2 as a medium and flows back into the anaerobic digester 100, thereby increasing the production efficiency of biogas.
  • FIG. 6 is a graph measuring the methane generation efficiency of a vertical vertical anaerobic digestion apparatus for organic waste treatment according to a third embodiment of the present invention.
  • Korean Patent Registration No. 10-1209133 is applied. compared to the invention.
  • the capacity of the constricted digester is 100 tons of each of the present invention and the control, and the input raw material having 30% of food wastewater and 70% of livestock manure is input under the condition that the internal temperature is 36°C to 40°C, and then the residence time of 40 days The amount of methane gas generated for 180 days was measured in each state.
  • the present invention produced an average of 2.61 L/d of methane per day for 180 days, whereas the control group produced an average of 1.8 L/d of methane per day for 180 days.

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  • Chemical & Material Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Organic Chemistry (AREA)
  • Water Supply & Treatment (AREA)
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Abstract

La présente invention concerne un dispositif de digestion anaérobie de type à cylindre vertical pour le traitement de déchets organiques, comprenant : un réservoir de digestion anaérobie (100) ; un tube perforé (200) installé dans la direction longitudinale du réservoir de digestion anaérobie (100) et positionné entre le centre du réservoir de digestion anaérobie (100) et la surface périphérique interne de celui-ci, le tube perforé (200) comportant des trous (210) formés à travers sa surface périphérique externe de sorte que les déchets organiques puissent passer librement à travers celui-ci ; et une vis de transfert (300) installée dans le tube perforé (200) de manière à transférer les sédiments du côté inférieur au côté supérieur de sorte que les déchets organiques non décomposés peuvent être décomposés au cours du processus de transfert. En conséquence, pendant le processus au cours duquel la vis de transfert transfère les déchets organiques du côté inférieur au côté supérieur, une décomposition suffisante par contact avec les micro-organismes peut être induite de sorte que, en améliorant l'efficacité de la décomposition des déchets organiques non décomposés, une quantité accrue de biogaz peut être produite.
PCT/KR2020/018126 2019-12-16 2020-12-11 Dispositif de digestion anaérobie du type à cylindre vertical pour traitement de déchets organiques WO2021125698A1 (fr)

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KR102098046B1 (ko) * 2019-12-16 2020-05-26 (주)케이이씨시스템 유기성 폐기물 처리를 위한 수직원통형 혐기성 소화장치
KR102607351B1 (ko) 2023-09-11 2023-11-30 주식회사 가온텍 수직 슬러지 이송장치

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KR101743564B1 (ko) * 2016-10-14 2017-06-15 양회남 슬러지 탈수기와 미생물을 이용한 유기성 슬러지 소멸 및 감량장치
KR102098046B1 (ko) * 2019-12-16 2020-05-26 (주)케이이씨시스템 유기성 폐기물 처리를 위한 수직원통형 혐기성 소화장치

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