KR0124971B1 - Treatment of food sludge by thermal degradation al low temperature - Google Patents
Treatment of food sludge by thermal degradation al low temperatureInfo
- Publication number
- KR0124971B1 KR0124971B1 KR1019940009778A KR19940009778A KR0124971B1 KR 0124971 B1 KR0124971 B1 KR 0124971B1 KR 1019940009778 A KR1019940009778 A KR 1019940009778A KR 19940009778 A KR19940009778 A KR 19940009778A KR 0124971 B1 KR0124971 B1 KR 0124971B1
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- Prior art keywords
- food waste
- filtrate
- low temperature
- treatment
- present
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/40—Destroying solid waste or transforming solid waste into something useful or harmless involving thermal treatment, e.g. evaporation
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
- C10L5/00—Solid fuels
- C10L5/40—Solid fuels essentially based on materials of non-mineral origin
- C10L5/46—Solid fuels essentially based on materials of non-mineral origin on sewage, house, or town refuse
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
- C11B3/00—Refining fats or fatty oils
- C11B3/006—Refining fats or fatty oils by extraction
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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
본 발명은 저온 열분해에 의한 음식물 쓰레기의 처리방법에 관한 것으로서, 더욱 상세하게는 주방에서 발생하는 음식물 쓰레기를 저온(50~275℃), 저압(0.2~59기압)하에서 1~2시간 가열처리하는 저온 열분해법에 의해 신속하고 깨끗하게 감량하며 동시에 이를 재 자원화하는 비용이 적게 들고 환경오염을 최소화하는 음식물 쓰레기 처리방법에 관한 것이다.The present invention relates to a method for treating food waste by low temperature pyrolysis, and more specifically, to process food waste generated in a kitchen at a low temperature (50 to 275 ° C.) and low pressure (0.2 to 59 atm) for 1 to 2 hours. The present invention relates to a food waste disposal method that reduces weight quickly and cleanly by low temperature pyrolysis and at the same time has a low cost of recycling resources and minimizes environmental pollution.
Description
제 1 도는 본 발명이 방법에 따라 음식물 쓰레기를 처리하는 과정을 개략적으로 나타낸 공정도이다.1 is a process diagram schematically showing a process of treating food waste according to the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 여과기 2 : 고압반응기1: filter 2: high pressure reactor
3 : 전기히터 4 : 냉각기3: electric heater 4: cooler
5 : 여과기 6 : 가스저장조5: filter 6: gas storage tank
본 발명의 저온 열분해에 의한 음식물 쓰레기의 처리방법에 관한 것으로서, 더욱 상세하게는 주방에서 발생하는 음식물 쓰레기를 50~275℃의 온도로 1~2시간 가열처리하는 열분해법에 의해 신속하고 깨끗하게 감량하며 동시에 이를 재 자원화하는 음식물 쓰레기 처리방법에 관한 것이다.The present invention relates to a method for treating food waste by low temperature pyrolysis, and more particularly, to quickly and cleanly reduce food waste generated in a kitchen by a pyrolysis method for heat treatment at a temperature of 50 to 275 ° C. for 1 to 2 hours. At the same time, it relates to a food waste disposal method that recycles it.
더욱 상세하게는 함수율이 70% 이상의 음식물 쓰레기를 열분해법에 의해 고속으로 감량하여 함수율이 10% 이하의 고체연료로 전환시켜 재 자원화하는 기술의 개발에 관한 것이다.More specifically, the present invention relates to the development of a technology for re-recycling food wastes having a moisture content of 70% or more by high speed pyrolysis to convert them into solid fuel having a water content of 10% or less.
최근들어 우리나라의 폐기물의 발생량은 24,000톤/일로 그 처리해야 할 양이 막대할 뿐 아니라 매년 약 10%의 증가추세에 있어 정부는 이의 처리에 고심하고 있다. 특히, 이 총폐기물중 음식물 쓰레기가 차지하는 비율은 16.7%로 산업폐기물 다음으로 가장 높으며 음식물 쓰레기는 산업폐기물에 비해 재활용율이 낮고 또한, 함수율 적어도 70% 이상으로 높아 부패가 빠르고 악취가 심하기 때문에 고속으로 처리하지 않으면 안되는 특성을 갖고 있는 폐기물이다.In recent years, the amount of waste generated in our country is 24,000 tons / day, and the amount of waste to be processed is enormous. In particular, food waste accounts for 16.7% of the total waste, which is the second highest after industrial waste. Food waste has a lower recycling rate than industrial waste, and has a high water content of at least 70%. This waste has the characteristics that must be treated.
따라서 현재까지는 음식물 쓰레기의 95% 이상을 매립이라고 하는 신속하고 비용이 저렴한 처리법에 의존해 왔으나 최근, 매립지의 침출수에 의한 지하수의 오염현상이 측정, 발표되고 지가의 상승 또는 매립지 주민들의 반대 등으로 매립법은 그 처리비용이 급상승하게 되어 사용이 거의 불가능하게 될 전망이다.Therefore, until now, more than 95% of food waste has been relied on landfills for rapid and inexpensive treatment.However, in recent years, landfill pollution has been measured and announced by landfill leachate, and landfill law has been raised due to rising land prices or opposition from landfill residents. The cost of processing will rise so that it will be almost impossible to use.
또한, 매립이외의 처리법으로는 가축사료로 활용하는 방법이 있는데 이 방법은 수년전까지만 해도 별도의 가공없이 활용되어 왔으나 최근에는 양돈업자의 대부분이 질병에 대한 우려와 분리수거 등의 어려움으로 현실성이 없는 처리법으로 인식되고 있다.In addition, there is a method of using a livestock feed as a treatment method other than landfill. This method has been used without processing for many years ago, but in recent years, most of the hog farmers are not practical due to the concern about disease and the difficulty of separate collection. It is recognized as a treatment.
상기의 문제점을 해결하기 위하여 음식물 쓰레기의 건조 후 사료화를 위한 건조기가 개발되어 시판되고 있으나 함수율이 70% 이상으로 높고 물의 잠열, 즉 기화열이 539kcal/g으로 대단히 높기 때문에 음식물 쓰레기의 처리하는데 소요되는 비용이 높은 문제가 있다.In order to solve the above problems, a drying machine for food after drying food waste has been developed and marketed. However, since the water content is higher than 70% and the latent heat of water, ie, the heat of vaporization, is very high at 539 kcal / g, the cost of treating food waste is very high. This is a high problem.
또다른 음식물 쓰레기의 처리방법의 한가지로 활용되고 있는 퇴비화는 그 기간이 약 60일 소요되기 때문에 이 기간에 발생되는 음식물 쓰레기의 저장소 즉 매립지가 필요하게 되므로 매립지의 부족현상을 초래하고 있는 현재 또는 미래에는 사용하기 어려운 방법으로 판단된다. 이를 해결하기 위한 방법으로써 속성 발효 효소들이 개발되어 사용되고 있느나 이 경우도 약 15일이 소요되므로 아직도 만족할만한 단계의 기술은 아니다.Composting, which is used as another food waste disposal method, takes about 60 days and thus requires the storage of food waste generated in this period, that is, landfills. It is judged to be difficult to use. Rapid fermentation enzymes have been developed and used as a way to solve this problem, but in this case it takes about 15 days, which is still not a satisfactory technology.
일반적으로 사료 및 퇴비는 그 부가가치가 높아 음식물 쓰레기의 사료화 및 퇴비화기술은 선호되고 있으나 국내의 음식물 쓰레기는 그 성분이 주로 채소류에 구성되어 있어 사료화 및 퇴비화에 필요한 질소 대비 탄소율이 기준에 비해 약 25% 부족하므로 음식물 쓰레기로부터 생산되는 사료 및 퇴비는 그 부가가치가 낮다고 판단되며 이들의 가장 큰 약점으로서는 그 처리속도가 낮다는 것이다.In general, feed and compost are highly value-added, and food waste and composting technology is preferred, but domestic food waste is mainly composed of vegetables, so the carbon ratio of nitrogen compared to the standard for feed and compost is 25 Due to the lack of%, feed and compost produced from food waste are considered to have low added value, and their biggest drawback is low processing speed.
이를 해결하기 위한 가장 일반적인 방법으로서는 소각법을 들 수 있겠다. 그러나 이 소각법은 그 처리속도가 빠르다는 장점을 갖고 있으나, 음식물 쓰레기는 앞서 언급한 바와같이 함수율이 높아 물의 기화열을 감안한다면 그 처리 비용이 높은 문제가 있다. 음식물 쓰레기의 함수율을 줄이기 위해 기계적 탈수기술이 개발되어 있으나 이 기술은 그 기능상 세포내의 수분을 제거하기는 거의 불가능하므로 함수율을 70% 이하로 감소시키기는 어려운 기술이다.The most common way to solve this problem is incineration. However, this incineration has the advantage that the treatment speed is fast, but the food waste has a high water content as mentioned above, so that the cost of treatment is high considering the heat of vaporization of water. Mechanical dehydration technology has been developed to reduce the moisture content of food waste, but it is difficult to reduce the moisture content below 70% because it is almost impossible to remove moisture in the cell.
한편, 함수율이 높은 폐기물의 처리를 위한 방법으로는 열 분해 액화기술이 개발되어 있다. 즉, 일본의 요코야마 신야 등에 의해 제안된 고온고압의 열분해액 액화기술은 동경에서 하루 3000톤씩 발생하는 함수율이 70% 이상의 하수폐기물(오니)을 처리하여 오일이라는 에너지로 전환시키기 위해 개발된 기술로써 [Journal of Chemical Engineering of Japan, 23(1), 6-11(1990)] 그 운전조건이 약 250℃, 100기압으로 반응의 조건이 격렬하여 운전의 위험성을 내포하고 있으며, 가스 및 수용성의 오일의 발생량이 높아 2차 환경오염 유발요인을 일으킬 뿐 아니라 장치비 및 운전비가 높아 경제성이 낮다고 판단된다.On the other hand, the thermal decomposition liquefaction technology has been developed as a method for the treatment of high water content waste. In other words, the high-temperature, high-pressure pyrolysis liquid liquefaction technology proposed by Shinya, Yokoyama, Japan, was developed to convert sewage waste (sludge) with a moisture content of more than 70%, which is 3000 tons per day in Tokyo, to be converted into energy of oil. Journal of Chemical Engineering of Japan, 23 (1), 6-11 (1990)] The operating conditions are about 250 ℃ and 100 atm and the reaction conditions are violent. The high generation volume not only causes secondary environmental pollution, but also has low economic feasibility due to high equipment and operation costs.
본 발명의 발명자들은 상기의 고온, 고압열분해기술의 문제점을 극복하고자 노력한 결과 저온, 저압 열분해법을 개발하게 되었는 바, 본 발명은 종래의 열분해법과는 달리 음식물 쓰레기를 저온에서 처리함에도 불구하고 그 부피를 고속으로 감량하며 가스와 수용성 오일의 성분을 감소시켜 2차 환경오염 유발요인을 줄이고, 생성되는 고상물질을 에너지원으로 재순환시킬 수 있어 고온열분해법등의 다른 처리법에 비해 경제성이 높은 특징이 있다.The inventors of the present invention have been trying to overcome the problems of the high temperature, high pressure pyrolysis technology as a result of the development of low temperature, low pressure pyrolysis method, the present invention, unlike the conventional pyrolysis method, the volume of the food waste at low temperature despite the treatment It can reduce the gas and water-soluble oil components at high speed, reduce the secondary environmental pollution causing factors, and recycle the generated solid materials to the energy source, which is more economical than other treatment methods such as high temperature pyrolysis.
본 발명은 음식물 쓰레기를 고속으로 처리함에는 변화없고 가능한한 저온에서 음식물 쓰레기를 열분해 시킴으로써 수용성 오일 및 가스의 발생을 억제시켜 수질 및 대기오염이라는 2차 환경 오염 유발요인을 감소시키며 음식물 쓰레기를 에너지로 재자원화하는 보다 경제적인 방법을 제공하는데 그 목적이 있다.According to the present invention, food waste is unchanged at high speed, and the food waste is pyrolyzed at the lowest possible temperature to suppress the generation of water-soluble oils and gases, thereby reducing the secondary environmental pollution causing factors such as water quality and air pollution, and converting food waste into energy. Its purpose is to provide a more economic way of recycling.
이하, 본 발명을 상세히 설명하면 다음과 같다.Hereinafter, the present invention will be described in detail.
본 발명은 음식물 쓰레기를 여과한 후 고압반응기(2)에서 50~275℃ 온도로 1~2시간 가열하여 분해, 감량시킨 후 냉각하고 다시 여과시켜 고형물과 여액으로 분리시키는 것을 그 특징으로 하는 저온 열분해에 의한 음식물 쓰레기 처리방법에 관한 것이다.The present invention is the low-temperature pyrolysis, characterized in that the food waste is filtered and then decomposed and reduced by heating at a high pressure reactor (2) at a temperature of 50 to 275 ° C. for 1 to 2 hours, then cooled and filtered to separate the solids and the filtrate. It relates to a food waste disposal method.
이와 같은 본 발명을 더욱 상세히 설명하면 다음과 같다.Referring to the present invention in more detail as follows.
본 발명은 저온, 저압하에서 음식물을 열분해하여 그 부피를 감소시키고 생성된 여액으로 부터 기름을 추출하여 본 발명의 방법의 에너지 자원으로 사용함으로써 환경오염을 방지하고 자원을 재활용할 수 있는 음식물 쓰레기의 처리방법에 관한 것으로서, 본 발명의 열분해 방법에 의해 처리 가능한 원료는 무우, 배추, 밥, 생선, 고기 등의 모든 음식물이 포함되어 있는 쓰레기이며, 원료에 함유된 수분의 함량은 105℃에서 고체의 강열감량(ignition loss)을 측정함으로써 구하되 본 발명에 사용한 원료의 수분함량은 80% 이상의 것을 사용한다.The present invention thermally decomposes food at low temperature and low pressure to reduce its volume, extract oil from the filtrate and use it as an energy source of the method of the present invention to prevent environmental pollution and to treat food waste that can recycle resources. The raw material which can be processed by the pyrolysis method of the present invention is a waste containing all foods such as radishes, Chinese cabbage, rice, fish, meat, etc., and the content of moisture contained in the raw material is solid ignition at 105 ° C. Obtained by measuring the loss (ignition loss), the water content of the raw material used in the present invention is 80% or more.
본 발명을 첨부도면 제 1 도에 따라 공정별로 설명한다.The invention will be described step by step in accordance with the accompanying drawings, FIG.
먼저, 음식물 쓰레기를 여과기(1)에서 여과한 후 전기히터(3)가 외장된 고압반응기(2)에 넣고 밀폐하여 가온하여 50~275℃에서 1~2시간 유지시킨다. 이때 반응압력은 수증기압에 의해 자동적으로 0.2기압에서 59기압으로 유지된 상태에서 반응이 진행된다. 반응온도가 이 범위를 벗어나면 열분해에 의한 탈수반응이 일어나지 않거나 열분해에 의한 가스발생량의 증가와 수용성의 오일의 양이 증가하여 수질오염 및 대기오염의 2차 환경오염 원인 물질의 발생량이 증가하는 문제가 대두된다.First, the food waste is filtered in the filter (1), the electric heater (3) is put in an external high-pressure reactor (2) and sealed to keep warm at 1 ~ 2 hours at 50 ~ 275 ℃. At this time, the reaction proceeds in a state where the reaction pressure is automatically maintained at 59 atm from 0.2 atm. If the reaction temperature is out of this range, the dehydration reaction does not occur by pyrolysis or the increase in the amount of gas generated by pyrolysis and the amount of water-soluble oil is increased, thereby increasing the amount of substances causing secondary environmental pollution of water and air pollution. Is emerging.
상기와 같은 조건에서 음식물 쓰레기를 분해시킨 후 냉각기(4)에서 상온까지 냉각한다. 반응중에 생성된 가스의 양은 가스저장소(6)에서 압력을 낮춘뒤 가스메터에 의해 측정하였으나 300℃까지는 무시할 정도의 양이었고 그 이상의 온도에서는 급격히 증가하는 경향을 보여주었다. 이러한 사실은 열분해액화법에서 잘 알 수 있으며 이 가스의 성분은 가스크로마토그래피에 의해 측정한 결과, 주성분이 메탄으로 확인되었다.The food waste is decomposed under the above conditions and then cooled to room temperature in the cooler (4). The amount of gas produced during the reaction was measured by a gas meter after reducing the pressure in the gas reservoir 6, but it was negligible up to 300 ° C. and showed a sharp increase at higher temperatures. This fact is well understood by the pyrolysis liquefaction method. The gas component was measured by gas chromatography, and the main component was identified as methane.
냉각된 생성물을 여과기(5)에서 여과하여 고형물과 여액(폐수)을 분리하고 여액을 용매인 50ml의 카본테트라클로라이드(CCl4) 또는 디클로로메탄(CH2Cl2)로 2회 추출하여 여액으로부터 흑갈색의 고 점성 기름을 추출하여 그 양으로부터 2차 환경오염 요인인 수질요염의 정도를 비교하였다. 고체잔류물의 열량은 여과된 고형물을 105℃의 온도에서 5시간 건조한 후 측정한다. 상기 생성물에서 분리된 고형물과 여액으로부터 추출된 고점성 기름은 본 발명의 음식물 쓰레기처리과정에 연료로서 재활용할 수 있다.The cooled product was filtered through a filter (5) to separate the solids and the filtrate (wastewater), and the filtrate was extracted twice with 50 ml of carbon tetrachloride (CCl 4 ) or dichloromethane (CH 2 Cl 2 ) as a solvent. The highly viscous oil was extracted and compared to the degree of water pollution, a secondary environmental pollutant. The calorific value of the solid residue is measured after drying the filtered solid at a temperature of 105 ° C. for 5 hours. The solids separated from the product and the highly viscous oil extracted from the filtrate can be recycled as fuel in the food waste treatment process of the present invention.
이와 같은 본 발명은 음식물 쓰레기를 열분해에 의해 간편하게 처리할 수 있는 방법으로써 폭발적으로 증가하고 있는 음식물 쓰레기를 처리하는데 획기적인 것으로 최근 전세계적으로 문제가 되고 있는 환경오염 방지에 기여할 수 있을 뿐 아니라 처리된 반응생성물을 에너지원으로서 재활용할 수 있다는 점에서 아주 유용하다.The present invention is a method that can easily treat food waste by pyrolysis, which is a breakthrough in treating food waste that is increasing explosively and contributes to preventing environmental pollution, which is a problem around the world, and treated reactions. This is very useful in that the product can be recycled as an energy source.
이하, 본 발명을 실시예에 의해 상세히 설명하면 다음과 같은 바 본 발명이 이 실시예에 의해 한정되는 것은 아니다.Hereinafter, the present invention will be described in detail with reference to the following examples, which are not intended to limit the present invention.
[실시예 1]Example 1
음식물 쓰레기에 가장 많이 함유되어 있는 무우 600g(수분함량 95%)을 2ℓ 고압반응기에 넣은 후 200℃(반응압력:16.4기압)에서 1시간 동안 반응시킨 후 상온까지 냉각하고 이 반응물을 여과하여 고형물과 여액으로 분리하였다. 여액을 50ml의 디클로로메탄 용매로 추출하여 여액으로부터 기름을 추출하였다. 실험으로부터 얻은 결과는 아래와 같고 이중 열량은 봄 칼로리메타(bomb calorimeter)에 의해 측정하였고 에너지 공급효율은 다음과 같은 식에서 구하였다.600g (95% water content) of radish, which is the most contained in food waste, is placed in a 2 liter high-pressure reactor, reacted at 200 ° C (reaction pressure: 16.4 atm) for 1 hour, cooled to room temperature, and filtered to react with solids. The filtrate was separated. The filtrate was extracted with 50 ml of dichloromethane solvent to extract oil from the filtrate. The results obtained from the experiment are as follows, and the double calorie is measured by the spring calorimeter and the energy supply efficiency is obtained from the following equation.
고형물:5.9g(열량:5359Kcal/g)Solids: 5.9g (calories: 5359Kcal / g)
기름:0.6gOil: 0.6 g
부피감소율:99%Volume reduction rate: 99%
에너지 공급효율:18.1%Energy supply efficiency: 18.1%
[실시예 2]Example 2
상온에서 하룻동안 건조한 무우 600g(수분함량 91%)을 2ℓ 고압반응기에 넣은 후 200℃(반응압력:16.4기압)에서 1시간 동안 반응시킨 후 상온까지 냉각하였으며 반응물을 여과하여 고형물과 여액으로 분리하였다. 여액을 50ml의 디클로로메탄 용매로 2회 추출하여 여액으로부터 기름을 추출하였다. 실험으로부터 얻은 결과는 아래와 같았다.600 g of dried radish (water content 91%) was put in a 2 L high pressure reactor for 1 hour at room temperature, reacted at 200 ° C. (reaction pressure: 16.4 atm) for 1 hour, cooled to room temperature, and the reaction mixture was filtered and separated into a solid and a filtrate. . The filtrate was extracted twice with 50 ml of dichloromethane solvent to extract oil from the filtrate. The results obtained from the experiment were as follows.
고형물:10.7g(열량:5200Kcal/g)Solids: 10.7g (calories: 5200Kcal / g)
기름:0.8gOil: 0.8 g
부피감소율:98%Volume reduction rate: 98%
에너지 공급효율:31.8%Energy supply efficiency: 31.8%
[실시예 3]Example 3
배추 600g(수분함량 95%)을 2ℓ 고압반응기에 넣은 후 200℃(반응압력:16.4기압)에서 1시간 동안 반응시킨 후 상온까지 냉각하였다. 반응물을 여과하여 고형물과 여액으로 분리하였으며 여액을 50ml의 카본테트라클로라이드 용매로 2회 추출하여 여액으로부터 기름을 추출하였다. 실험으로부터 얻은 결과는 아래와 같았다.Chinese cabbage 600g (water content 95%) was put in a 2L high-pressure reactor and reacted for 1 hour at 200 ℃ (reaction pressure: 16.4 atm) and then cooled to room temperature. The reaction was filtered to separate the solid and the filtrate, and the filtrate was extracted twice with 50 ml of carbon tetrachloride solvent to extract oil from the filtrate. The results obtained from the experiment were as follows.
고형물:24.8g(열량:2723Kcal/g)Solids: 24.8 g (calories: 2723 Kcal / g)
기름:0.1gOil: 0.1 g
부피감소율:96%Volume reduction rate: 96%
에너지 공급효율:38.6%Energy supply efficiency: 38.6%
[실시예 4]Example 4
식당에서 얻은 음식물 쓰레기를 아스피레이터를 사용하여 감압여과한 후 수분함량이 80%인 음식물 쓰레기를 원료로 사용하였다. 이 원료의 휘발성 물질의 함량 98.9%이었고, 그 성분은 지방 12.75%, 단백질 20.2%와 섬유질의 함량 76%이었다. 상기와 음식물 쓰레기 600g을 고압반응기에 넣은 후 200℃(반응압력:16.4기압)에서 1시간 동안 반응시킨 후 상온까지 냉각하였다. 반응물을 여과하여 고형물과 여액으로 분리하였다. 여액을 50ml의 디크로로메탄 용매로 2회 추출하여 여액으로부터 기름을 추출하였다. 실험으로부터 얻은 결과는 아래와 같고, 음식물 쓰레기중에 함유된 단백질, 지방, 탄수화물과 섬유질의 분석은 각각 KSH2147 및 KSH2113에 의해 측정하였다.The food waste obtained at the restaurant was filtered under reduced pressure using an aspirator, and food waste having 80% water content was used as a raw material. The volatile content of this raw material was 98.9%, which was 12.75% fat, 20.2% protein and 76% fiber. The food waste was put into a high-pressure reactor 600g and then reacted for 1 hour at 200 ℃ (reaction pressure: 16.4 atm) and then cooled to room temperature. The reaction was filtered to separate solid and filtrate. The filtrate was extracted twice with 50 ml of dichloromethane solvent to extract oil from the filtrate. The results obtained from the experiment are as follows. The analysis of protein, fat, carbohydrate and fiber in food waste was measured by KSH2147 and KSH2113, respectively.
고형물:30.1g(열량:5609Kcal/g)Solids: 30.1 g (calories: 5609 Kcal / g)
기름:1.1gOil: 1.1 g
부피감소율:97.7%Volume Reduction Ratio: 97.7%
에너지 공급효율:96.5%Energy supply efficiency: 96.5%
[비교예 1]Comparative Example 1
무우 600g(수분함량 95%)을 2ℓ 고압반응기에 넣은 후 300℃(반응압력 86.0기압)에서 1시간 동안 반응시킨 후 상온까지 냉각하였다. 반응물을 여과하여 고형물과 여액으로 분리하였으며 여액을 50ml의 카본테트라클로라이드 용매로 2회 추출하여 여액으로부터 기름을 추출하였다. 실험으로부터 얻은 결과는 아래와 같았다.Radish 600g (water content 95%) was put in a 2L high pressure reactor and reacted for 1 hour at 300 ℃ (reaction pressure 86.0 atm) and then cooled to room temperature. The reaction was filtered to separate the solid and the filtrate, and the filtrate was extracted twice with 50 ml of carbon tetrachloride solvent to extract oil from the filtrate. The results obtained from the experiment were as follows.
고형물:5.0g(열량:6750Kcal/g)Solids: 5.0 g (calories: 6750 Kcal / g)
기름:1.4gOil: 1.4 g
부피감소율:99%Volume reduction rate: 99%
에너지 공급효율:12.3%Energy supply efficiency: 12.3%
[비교예 2]Comparative Example 2
배추 600g(수분함량 95%)을 2ℓ 고압반응기에 넣은 후 300℃(반응압력 86.0기압)에서 1시간 동안 반응시킨 후 상온까지 냉각하였다. 반응물을 여과하여 고형물과 여액으로 분리하였으며 여액을 50ml의 카본테트라클로라이드 용매로 2회 추출하여 여액으로부터 기름을 추출하였다. 추출한 후 용매는 증발기에 의해 회수한 후 점성이 있는 기름을 얻었다. 실험으로부터 얻은 결과는 아래와 같았다.Chinese cabbage 600g (water content 95%) was put in a 2L high pressure reactor and reacted for 1 hour at 300 ℃ (reaction pressure 86.0 atm) and then cooled to room temperature. The reaction was filtered to separate the solid and the filtrate, and the filtrate was extracted twice with 50 ml of carbon tetrachloride solvent to extract oil from the filtrate. After extraction, the solvent was recovered by an evaporator to obtain a viscous oil. The results obtained from the experiment were as follows.
고형물:5.5g(열량:5700Kcal/g)Solids: 5.5 g (calories: 5700 Kcal / g)
기름:1.7gOil: 1.7 g
부피감소율:99%Volume reduction rate: 99%
에너지 공급효율:11.4%Energy supply efficiency: 11.4%
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