KR100328580B1 - method for fertilizing food garbage - Google Patents
method for fertilizing food garbage Download PDFInfo
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- KR100328580B1 KR100328580B1 KR1019990054467A KR19990054467A KR100328580B1 KR 100328580 B1 KR100328580 B1 KR 100328580B1 KR 1019990054467 A KR1019990054467 A KR 1019990054467A KR 19990054467 A KR19990054467 A KR 19990054467A KR 100328580 B1 KR100328580 B1 KR 100328580B1
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- South Korea
- Prior art keywords
- water
- food waste
- filter
- soluble impurities
- food
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 21
- 235000013305 food Nutrition 0.000 title claims abstract description 16
- 239000010813 municipal solid waste Substances 0.000 title description 2
- 239000010794 food waste Substances 0.000 claims abstract description 71
- 150000003839 salts Chemical class 0.000 claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000012535 impurity Substances 0.000 claims abstract description 18
- 230000004720 fertilization Effects 0.000 claims abstract description 6
- 244000005700 microbiome Species 0.000 claims abstract description 5
- 235000021107 fermented food Nutrition 0.000 claims abstract description 4
- 238000001914 filtration Methods 0.000 claims abstract description 4
- 239000000203 mixture Substances 0.000 claims abstract description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- 239000000446 fuel Substances 0.000 claims description 3
- 238000001704 evaporation Methods 0.000 claims 1
- 239000008236 heating water Substances 0.000 abstract description 2
- 239000003337 fertilizer Substances 0.000 description 7
- 239000003473 refuse derived fuel Substances 0.000 description 6
- 238000000855 fermentation Methods 0.000 description 5
- 230000004151 fermentation Effects 0.000 description 5
- 239000008237 rinsing water Substances 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 239000002361 compost Substances 0.000 description 2
- 238000010169 landfilling Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 240000004808 Saccharomyces cerevisiae Species 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000010849 combustible waste Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 235000019645 odor Nutrition 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- 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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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23K—FODDER
- A23K10/00—Animal feeding-stuffs
- A23K10/10—Animal feeding-stuffs obtained by microbiological or biochemical processes
- A23K10/12—Animal feeding-stuffs obtained by microbiological or biochemical processes by fermentation of natural products, e.g. of vegetable material, animal waste material or biomass
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F9/00—Fertilisers from household or town refuse
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/40—Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse
Abstract
본 발명은 환경친화적인 음식물쓰레기를 사료화 및 비료화 처리방법에 관한 것으로, 음식물쓰레기 내에 함유된 염분을 효과적으로 제거하여 음식물쓰레기를 사료화 혹은 비료화시킬 수 있고, 비교적 염가인 열원을 사용함으로써 음식물 처리비용이 절감될 수 있도록 한 것이다. 이를 위해, 음식물쓰레기 사료화 및 비료화 처리방법은, 음식물쓰레기에 물을 혼합하여 음식물쓰레기를 헹궈서 음식물 내의 수용성 불순물 및 염분을 물에 용해시키는 제 1단계; 음식물쓰레기와 수용성 불순물 및 염분이 용해되어 있는 물로 구성된 혼합물을 필터링하여 수용성 불순물 및 염분이 용해되어 있는 물은 필터를 통과하도록 하여 필터에는 음식물이 걸러지도록 하는 제 2단계; 필터를 통과한 물을 가열하여 수분을 증발시키는 제 3단계; 수분이 증발되고 남은 수용성 불순물 및 염분을 함유한 찌꺼기를 처리하는 제 4단계; 제 2단계에서 필터에 걸러진 음식물쓰레기를 미생물로 발효시키는 제 5단계; 및 발효된 음식물쓰레기를 사료화 혹은 비료화시키는 제 6단계를 포함하는 것을 특징으로 한다.The present invention relates to a method for feeding and fertilizing environmentally friendly food waste, which can effectively remove salts contained in food waste to feed or fertilize food waste, and reduce food processing costs by using a relatively inexpensive heat source. It would be possible. To this end, food waste feed and fertilization treatment method, the first step of dissolving the water-soluble impurities and salt in the water by mixing the food waste with water to rinse the food waste; A second step of filtering the mixture consisting of food waste and water in which water-soluble impurities and salts are dissolved so that water in which water-soluble impurities and salts are dissolved passes through the filter to filter foods through the filter; A third step of heating water passing through the filter to evaporate moisture; A fourth step of treating the residue containing water-soluble impurities and salts remaining after the water is evaporated; A fifth step of fermenting the food waste filtered by the filter in the second step with a microorganism; And a sixth step of feeding or fertilizing the fermented food waste.
Description
본 발명은 음식물쓰레기 처리방법에 관한 것으로, 더욱 상세하게는 음식물쓰레기 내에 함유된 염분을 효과적으로 제거하여 음식물쓰레기를 사료화 혹은 비료화시킬 수 있고, 비교적 염가인 열원을 사용함으로써 음식물 처리비용이 절감될 수 있으며, 환경친화적인 음식물쓰레기를 사료화 및 비료화 처리방법에 관한 것이다.The present invention relates to a method for treating food waste, and more particularly, to effectively remove salts contained in food waste to feed or fertilize food waste, and to reduce food processing costs by using a relatively inexpensive heat source. The present invention relates to a method of feeding and fertilizing environmentally friendly food waste.
일반적으로, 우리나라의 연간 쓰레기의 발생량은 약 2천만톤에 이르고 있다. 한해동안 발생하는 음식물쓰레기의 양은 97년 기준으로 약 550만톤에 달하고 있으며, 하루 평균 배출량은 15,075톤으로 전체쓰레기 발생량의 28 %를 차지하고 있다.In general, the annual amount of garbage generated in our country is about 20 million tons. The amount of food waste generated during the year amounted to about 5.5 million tons in 1997, and the average daily discharge amounted to 15,075 tons, accounting for 28% of the total waste generated.
음식물 쓰레기를 처리하는 방법으로는 소각로에서 소각 처리하는 방법과, 일정부지에 매립시켜 자연적으로 발효 처리시키는 방법, 및 사료나 퇴비 등으로 재활용하는 방법이 있다.As a method of treating food waste, there is a method of incineration in an incinerator, a method of landfilling a natural site by fermentation, and recycling the feed or compost.
음식물 쓰레기를 소각하는 방법의 경우에는, 가연성 쓰레기 소각장 및 대형 소각장의 건설기간이 많이 걸리고 소각으로 인한 다이옥신(dioxin) 등 유해물질 및 악취발생으로 주민 피해가 발생하기 때문에, 우리나라에서는 거의 채용되고 있지 않은 실정이다. 그리고, 음식물 쓰레기를 소각시키기 위해, 경유 등의 비교적 고가의 기름을 사용함으로써, 음식물 쓰레기 처리비용이 많이 소요된다는 단점도 있다.In the case of incineration of food waste, the construction of combustible waste incinerators and large incinerators takes a long time, and incineration of harmful substances such as dioxin and odors caused by incineration causes damage to residents. It is true. In addition, the use of relatively expensive oil, such as light oil, to incinerate the food waste, there is also a disadvantage that takes a lot of food waste disposal costs.
우리나라의 경우 음식물쓰레기의 95%를 매립하고 있으며, 음식물쓰레기를 사료나 비료로 재활용하는 경우는 약 316톤에 불과한 실정이다.In Korea, 95% of food waste is reclaimed and only 316 tons of food waste is recycled as feed or fertilizer.
그러나, 음식물쓰레기를 매립할 경우에는, 음식물쓰레기로부터 침출수가 발생하여 토양이 오염되고, 지반이 침하되는 현상이 일어나게 된다. 그리고, NIMBY(not in my backyard) 현상이 확산되고 있는 실정에서, 주민들이 오염시설인 쓰레기 매립장 설치에 반대하게 됨으로써, 매립장 확보도 힘든 실정이다.However, when the food waste is buried, leachate is generated from the food waste, the soil is contaminated, and the ground is subsided. In addition, in the situation where the NIMBY (not in my backyard) phenomenon is spreading, it is difficult to secure a landfill because residents oppose the installation of a landfill which is a polluting facility.
음식물 쓰레기를 사료나 퇴비로 사용하는 방법은, 철저한 멸균처리, 신선도 유지, 이물질 제거 등의 어려움이 있다. 이중에서 특히 음식물 쓰레기 내에 함유되어 있는 염분(NaCl)을 제거하는 것이 가장 어려운 난관으로 인식되고 있다.The method of using food waste as feed or compost is difficult to thoroughly sterilize, maintain freshness, and remove foreign substances. Among them, the removal of salt (NaCl) contained in food waste, in particular, is considered the most difficult challenge.
음식물 쓰레기를 사료화 혹은 비료화하기 위해서는, 먼저 음식물 쓰레기를 발효시키는 것이 필수적이다. 발효는 효모,세균,곰팡이 등의 미생물의 작용으로 유기물이 분해 또는 산화/환원하여 알코올이나 탄산가스 등으로 변하는 현상을 말하는 것으로, 음식물 쓰레기가 미생물의 작용에 의해 분해되는 것을 음식물쓰레기 발효방법이라 한다.In order to feed or fertilize the food waste, it is essential to first ferment the food waste. Fermentation refers to a phenomenon in which organic matter is decomposed or oxidized / reduced into alcohol or carbon dioxide by the action of microorganisms such as yeast, bacteria and mold, and food waste is decomposed by the action of microorganisms. .
우리나라의 경우, 음식물 조리 과정에서 다른 나라에 비해 비교적 많은 양의 소금을 사용하고 있기 때문에, 음식물 쓰레기 내에는 다량의 염분이 함유되어 있다. 염분은 사료 및 비료를 제조하기 위해 반드시 제거되어야 할 성분으로서, 우리나라에서 음식물쓰레기의 사료화 및 비료화 실패의 가장 큰 요인으로 작용하고 있는 실정이다.In Korea, since a relatively large amount of salt is used in the food cooking process compared to other countries, the food waste contains a large amount of salt. Salt is a component that must be removed to manufacture feed and fertilizers, and it is a fact that it acts as a major factor in the failure of feed and fertilization of food waste in Korea.
따라서, 본 발명의 목적은, 상기한 문제점을 해결하기 위해 안출된 것으로서, 음식물쓰레기 내에 함유된 염분을 효과적으로 제거하여 음식물쓰레기를 사료화 혹은 비료화시킬 수 있고, 비교적 염가인 열원을 사용함으로써 음식물 처리비용이 절감될 수 있는 음식물쓰레기를 사료화 및 비료화 처리방법을 제공하는 것이다.Accordingly, an object of the present invention is to solve the above problems, it is possible to effectively remove the salt contained in the food waste to feed or fertilize the food waste, food processing costs by using a relatively inexpensive heat source It is to provide a method of feed and fertilization of food waste that can be reduced.
또한, 환경친화적인 음식물쓰레기 처리방법을 제공하는 것이 본 발명의 다른 목적이다.In addition, it is another object of the present invention to provide an environmentally friendly food waste treatment method.
도 1 - 본 발명에 따른 음식물쓰레기 사료화 및 비료화 처리방법을 도시한 처리순서도.1-a flow chart illustrating a method for treating food waste feed and fertilizer according to the present invention.
상기한 목적을 달성하기 위해, 본 발명에 따른 음식물쓰레기 사료화 및 비료화 처리방법은, 음식물쓰레기에 물을 혼합하여 음식물쓰레기를 헹궈서 음식물 내의 수용성 불순물 및 염분을 물에 용해시키는 제 1단계; 음식물과 수용성 불순물 및 염분이 용해되어 있는 물로 구성된 혼합물을 필터링하여 수용성 불순물 및 염분이 용해되어 있는 물은 필터를 통과하도록 하여 필터에는 음식물이 걸러지도록 하는 제 2단계; 필터를 통과한 물을 가열하여 수분을 증발시키는 제 3단계; 수분이 증발되고 남은 수용성 불순물 및 염분을 함유한 찌꺼기를 처리하는 제 4단계; 제 2단계에서 필터에 걸러진 음식물쓰레기를 미생물로 발효시키는 제 5단계; 및 발효된 음식물쓰레기를 사료화 혹은 비료화시키는 제 6단계를 포함하는 것을 특징으로 한다.In order to achieve the above object, the food waste feed and fertilization treatment method according to the present invention, the first step of dissolving the water-soluble impurities and salt in the food by mixing the food waste with water to rinse the food waste; A second step of filtering the mixture composed of food and water in which water-soluble impurities and salts are dissolved so that water in which water-soluble impurities and salts are dissolved passes through the filter to filter foods through the filter; A third step of heating water passing through the filter to evaporate moisture; A fourth step of treating the residue containing water-soluble impurities and salts remaining after the water is evaporated; A fifth step of fermenting the food waste filtered by the filter in the second step with a microorganism; And a sixth step of feeding or fertilizing the fermented food waste.
여기서, 제 3단계에서는 비교적 염가인 RDF(refuse derived fuel)를 열원으로 하여 물을 가열하도록 하면, 연료비가 절감될 수 있다.Here, in the third step, if the water is heated using a relatively inexpensive RDF (refuse derived fuel) as a heat source, fuel costs may be reduced.
이에 따라, 음식물쓰레기 내에 함유된 염분을 효과적으로 제거하여 음식물쓰레기를 사료화 혹은 비료화시킬 수 있게 된다. 그리고, 비교적 염가인 RDF를 열원으로 사용함으로써 음식물 처리비용이 절감될 수 있게 된다.Accordingly, the salt contained in the food waste can be effectively removed to feed or fertilize the food waste. In addition, by using a relatively inexpensive RDF as a heat source, food processing costs can be reduced.
이하 첨부도면을 참조로 하여 본 발명에 따른 음식물쓰레기 사료화 및 비료화 처리방법을 더욱 상세하게 설명한다.With reference to the accompanying drawings will be described in more detail the food waste feed and fertilizer treatment method according to the present invention.
본 발명에 따른 음식물쓰레기 사료화 및 비료화 처리방법은, 음식물쓰레기를 세척수로 헹군 다음 필터링하여 음식물쓰레기로부터 수용성불순물 및 염분을 분리한 다음, 음식물쓰레기를 사료화 및 비료화시키는 공정으로 이루어진다.The food waste feed and fertilization treatment method according to the present invention consists of rinsing the food waste with washing water and then filtering to separate the water-soluble impurities and salts from the food waste, and then feeding and fertilizing the food waste.
이를 도 1을 참조로 하여 더욱 상세하게 설명하면 다음과 같다.This will be described in more detail with reference to FIG. 1 as follows.
먼저, 수용용기에 음식물쓰레기를 모아서 담아두고, 헹굼용 헹굼수를 수용용기에 부어서 음식물쓰레기를 헹구게 된다(S1). 이때, 음식물쓰레기에 함유되어 있는 수용성 불순물 및 염분이 헹굼수에 용해된 상태로 있게 된다.First, the food waste is collected and put in a container, and the rinsing water for rinsing is poured into the container to rinse the food waste (S1). At this time, the water-soluble impurities and salts contained in the food waste remain in a rinse water.
그리고, 수용용기에 수용되어 있는 음식물쓰레기와 수용성 불순물 및 염분이 용해되어 있는 물로 구성된 혼합물을 필터에 붇게 되면(S2), 필터의 격자보다 부피가 큰 음식물쓰레기는 필터에 걸러지게 된다(S3). 그리고, 액체상태의 헹굼수는 필터를 통과하여, 별도의 용기에 모아지게 된다(S6). 이 헹굼수에는 음식물쓰레기에 함유되어 있던 수용성 불순물 및 염분이 용해되어 있다.Then, when the mixture consisting of food waste contained in the container and water in which water-soluble impurities and salt are dissolved is applied to the filter (S2), the food waste having a volume larger than the grid of the filter is filtered out (S3). The rinsing water in the liquid state passes through the filter and is collected in a separate container (S6). In this rinse water, water-soluble impurities and salts contained in food waste are dissolved.
이 헹굼수의 처리는 가열에 의해 이루어지게 된다. 즉, 취출된 헹굼수를 가열함으로써, 수분을 증발시키고(S7), 수분이 증발하고 남은 불순물 및 염분은 따로 모아서 버리게 된다(S8). 여기서, 헹굼수를 가열하기 위한 열원은 비교적 염가인 RDF(refuse derived fuel)를 사용하게 됨으로써, 연료절감의 효과를 얻을 수 있게 된다.This rinsing water is treated by heating. That is, by heating the extracted rinsing water, the water is evaporated (S7), and the impurities and salts remaining after the water is evaporated are collected and discarded (S8). Here, the heat source for heating the rinsing water by using a relatively inexpensive RDF (refuse derived fuel), it is possible to obtain the effect of fuel savings.
한편, 필터에 걸러진 음식물쓰레기는 따로 모아진다. 이 음식물쓰레기는 이미 수용성불순물 및 염분이 제거된 상태로 있기 때문에, 발효시키기에 최적의 상태에 있게 된다. 그래서, 음식물쓰레기를 발효시킨 다음(S4), 발효된 음식물쓰레기를 사용하여 사료 및 비료 등을 만들게 된다(S5). 여기서, 염분은 음식물쓰레기의 발효를 억제하는 기능이 있는데, 염분이 제거됨으로써 발효가 효과적으로 수행될 수 있게 된다.Meanwhile, the food waste filtered by the filter is collected separately. Since this food waste is already free of water soluble impurities and salt, it is in an optimal state for fermentation. So, after fermenting the food waste (S4), using the fermented food waste to make feed and fertilizers (S5). Here, the salt has a function of inhibiting the fermentation of food waste, it is possible to effectively carry out the fermentation by removing the salt.
상기한 바와 같이, 종래에는 음식물쓰레기에 함유되어 있는 염분때문에, 음식물쓰레기를 사료화 및 비료화하는 것이 거의 실패하였지만, 본 발명에서는 음식물쓰레기에 함유된 염분이 효과적으로 제거됨으로써, 음식물쓰레기를 사료 및 비료로 재생하는 것이 가능하게 된다.As described above, due to the salt contained in the food waste, it has almost failed to feed and fertilize the food waste. However, in the present invention, the salt contained in the food waste is effectively removed, thereby regenerating the food waste into the feed and fertilizer. It becomes possible.
이에 따라, 95%에 달하는 환경오염적인 음식물쓰레기의 매립방법으로부터 탈피하여, 음식물쓰레기를 환경친화적인 사료화 및 비료화시키는 방법이 실현될 수 있게 됨으로써, 환경오염이 방지될 수 있게 된다.Accordingly, by avoiding 95% of environmentally contaminated food waste landfilling methods, a method of environmentally friendly food feed and fertilizer can be realized, whereby environmental pollution can be prevented.
이에 따라, 음식물쓰레기 내에 함유된 염분을 효과적으로 제거하여 음식물쓰레기를 사료화 혹은 비료화시킬 수 있게 된다. 그리고, 비교적 염가인 RDF를 열원으로 사용함으로써 음식물 처리비용이 절감될 수 있게 된다.Accordingly, the salt contained in the food waste can be effectively removed to feed or fertilize the food waste. In addition, by using a relatively inexpensive RDF as a heat source, food processing costs can be reduced.
따라서, 본 발명에 의한 음식물 내에 함유된 염분을 효과적으로 제거할 수 있고, 비교적 염가인 열원을 사용함으로써 음식물 처리비용이 절감될 수 있는 음식물쓰레기 처리방법을 제공하는 것이다.Therefore, it is possible to effectively remove the salt contained in the food according to the present invention, to provide a food waste treatment method that can reduce the cost of food treatment by using a relatively inexpensive heat source.
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| KR1019990054467A KR100328580B1 (en) | 1999-12-02 | 1999-12-02 | method for fertilizing food garbage |
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| KR20030070247A (en) * | 2002-02-23 | 2003-08-30 | (주)오비티 | The preparation method of a semidried type fooder from the waste of food and drink utilizing microbes |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09165283A (en) * | 1995-12-13 | 1997-06-24 | Japan Steel Works Ltd:The | Apparatus for fermentation treatment |
| KR970052343U (en) * | 1996-02-10 | 1997-09-08 | 김두화 | Food waste incinerator |
| KR19980071974A (en) * | 1998-07-08 | 1998-10-26 | 이성춘 | Food waste fermented feed and fertilizer treatment apparatus and method |
| KR100278374B1 (en) * | 1999-02-26 | 2001-01-15 | 김용주 | Management construction of food sweepings make use of burning fever of useless |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09165283A (en) * | 1995-12-13 | 1997-06-24 | Japan Steel Works Ltd:The | Apparatus for fermentation treatment |
| KR970052343U (en) * | 1996-02-10 | 1997-09-08 | 김두화 | Food waste incinerator |
| KR19980071974A (en) * | 1998-07-08 | 1998-10-26 | 이성춘 | Food waste fermented feed and fertilizer treatment apparatus and method |
| KR100278374B1 (en) * | 1999-02-26 | 2001-01-15 | 김용주 | Management construction of food sweepings make use of burning fever of useless |
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