• 제목/요약/키워드: reduction of food waste

검색결과 155건 처리시간 0.023초

각종 미생물에 의한 음식물쓰레기 침출수의 악취저감 연구 (A Study on the odor reduction of food waste leachate by some microorganisms)

  • 김동원;정혜원;이경석;박형용;이기영
    • 유기물자원화
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    • 제13권2호
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    • pp.91-97
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    • 2005
  • 본 연구는 종이 다른 여러 가지 미생물을 사용하여 음식물쓰레기 침출수의 악취저감 효과를 가지는 균주를 선별하고자 실시하였다. 침출수에 전배양한 해수미세조류인 Spirulina plantensis 와 Chlorella vulgaris, 효모 Saccharomyces cerevisae와 세균인 Bacillus cereus를 각각 10% 주입하여 총 10일간 배양하였다. 72시간 주기로 pH와 염도, 관능검사를 시행한 결과, pH는 초기에 3.5~4.0 값을 보였으나 시일이 경과함에 따라 4.9~7.4 수준까지 증가하였고, 염도는 Chlorella vulgaris와 Spirulina platensis는 급격히 낮아졌다. 관능평가를 통한 악취시험 결과 광합성 미세조류인 Chlorella vulgaris가 발효 종료일인 10일째 거의 취기를 느낄 수 없는 악취도 1을 나타내어 악취제어에 효과가 있는 것으로 나타났다.

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빈그릇교육을 통한 대학 기숙사의 음식물쓰레기 감량효과에 대한 연구 (Effect of Clean Plate Education on Food Wastes Reduction in University Dormitory)

  • 이은경;김덕길;김승우;정신영;최광수
    • 한국환경과학회지
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    • 제21권7호
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    • pp.865-873
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    • 2012
  • Clean plate education program was applied to change students' perception on food waste in the dormitory cafeteria of T campus G university that is located in Tongyeong, in which 408 students joined the program. From survey and food waste monitoring, it was found that clean plate education program was effective to change students' perception as well as action. Half students (50.5%) answered that their eating habit changed, and among them 30.1 % students left a little food on the plate and 13.1% students left no food behind. Many students become aware of the seriousness of food waste issue (84.5%), and 44.2% students were trying to reduce leftover. Food waste generation in cafeteria was 341.9, 576.1, 344.3g/capita/day in 2005, 2007 and 2008, respectively. And this shows that food waste generations were much less than national average data except 2007. Therefore we could conclude that clean plate education program was satisfactory to change students' perception on food and to change their action, and it could be an excellent new approach to resolve a social issue caused by food waste. In order to reduce food waste generation at dormitory cafeteria, food taste and diet should be improved and students' eating habits also should be changed. For this, a practical program like clean plate education should be organized.

Evaluation of Three Feasible Biodegradation Models for Food Waste

  • Kwon, Sung-Hyun;Cho, Daechul
    • 청정기술
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    • 제28권1호
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    • pp.32-37
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    • 2022
  • Food waste is produced from food factories, food services, and home kitchens. The generated mass reached 5.4 million tons/year in 2020. The basic management technology for such waste has been biological degradation under an anaerobic environment. However, the whole process is intrinsically slow and considerably affected by the inner physicochemical properties of the waste and other surrounding conditions, which makes optimization of the process difficult. The most promising options to counter this massive generation of waste are eco-friendly treatments or recycling. As a preliminary step for these options, attempts were made to evaluate the feasibility and usability of three simulative models based on reaction kinetics. Model (A) predicted relative changes over reaction time for reactant, intermediate, and product. Overall, an increased reaction rate produced less intermediate and more product, thereby leading to a shorter total reaction time. Particle diminishing model (B) predicted reduction of the total waste mass. The smaller particles diminished faster along with the dominant effect of microbial reaction. In Model (C), long-chain cellulose was predicted to transform into reducing sugar. At a standard condition, 48% of cellulose molecules having 105 repeating units turned into reducing sugar after 100 h. Also it was found that the optimal enzyme concentration where the highest amount of remnant sugar was harvested was 1 mg L-1.

일부 학교급식 잔반에서 발생하는 영양손실에 관한 연구 (Assessment of the nutritional value of the plate waste Generated in School Foodservices in Kyungbuk Area)

  • 안주연;이혜상
    • 대한영양사협회학술지
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    • 제8권3호
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    • pp.311-317
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    • 2002
  • The purpose of this study was to analyse the nutrient intake of the elementary students participating in the School lunch program and to compare the amount of the plate waste generated in two school foodservice operations that were located in an urban(school A) and a rural area(school B), respectively. A plate waste analysis was conducted for each menu item to separate and quantify food waste discarded in service phases of each operation. The SPSS 10.0 for window was used for data analysis. Non-parametric test (Mann-Whitney) was adopted to determine if significant differences existed in amounts of food waste generated in school A and school B. An average of 415 meals, including 43 adult meals, were served daily in school A, while an average of 177 meals, including 24 adult meals, were served daily in school B. Throughout the study the percentage of plate waste in vegetable dishes was high in both school. The food served to the students in school A met most of the RDA set by Korean Nutrition Association except vitamin A, while that served to the students in school B satisfied RDA in all aspects. Between 10-20% of the nutrients served were discarded as plate waste(school A : 11-27%; school B : 5-14%). Students in school B took significantly more niacin than students in school A did. It should be noted, though, that the RDA was still met in both schools except the vitamin A in case of school A, even after considering the plate waste. The research results suggested that school foodservice dieticians should evaluate the acceptability of menu items based on food waste per meal, and help increase the students' awareness of the environmental impact of food waste. Further, teachers, parents and dieticians should be encouraged to provide environmental education to the students that focused on the reduction of food waste.

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음식물 소멸기에서 발생하는 응축폐수의 Polyethylene 침지형 중공사막을 이용한 처리 특성 (Processing Characteristics of the Condensed Wastewater Resulting from Food Waste Disposal using a Submerged Polyethylene Hollow Fiber Membrane)

  • 유재상;전태봉;김진호;정건용
    • 멤브레인
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    • 제20권2호
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    • pp.127-134
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    • 2010
  • 연구는 음식물 쓰레기를 음식물 소멸기에서 미생물에 의해 발효하여 유기물을 감량화하고, 음식물 발효시 발생되는 가스를 냉각기에서 기체와 수분으로 분리하여 기체는 반응기로 다시 보내고 수분은 응축하여 침지식 MF 중공사 분리막이 장착된 MBR 시스템에 적용하여 처리하는 시스템에 관한 연구이다. (주)바이오하이테크에서 제작한 음식물 소멸기와 수처리 장치에 침지식 MF 중공사 모듈을 설치하여 90일간 H연구소 직원식당에서 발생되는 음식물 쓰레기를 연속 투입하여 처리하였다. 음식물 소멸기 초기 Seeding를 위하여 수분조절제로 미강, 왕겨, 톱밥을 305 kg 투입하였고 음식물은 운전기간동안 1,648 kg투입하였고 응축폐수는 1,600 L 발생되었다. 음식물 소멸기 운전 종료 후 배출된 발효 부산물은 386 kg으로 감량율은 약 80%로 조사되었다. 침지식 MF 중공사 분리막 모듈을 응축폐수의 MBR 시스템에 적용하여 유기물 처리한 결과 제거율은 각각 BOD 99.9%, COD 97.5%, SS 98.6%, T-N 54.6%, T-P 34.7%였으며, 총대장균은 100%가 제거되었다.

지렁이 화분을 가꾸는 프로그램이 음식물류 폐기물의 감량과 환경소양에 미치는 효과 (The Effects on the Reduction of Food and Drink Waste and Environmental Literacy by the Program of Rasing Earthworm Flowpots)

  • 최돈형;김병섭;조성화
    • 한국환경교육학회지:환경교육
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    • 제19권2호
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    • pp.147-158
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    • 2006
  • The purpose of this study is to closely examine the changes of food and drink waste amounts, and student's environmental literacy. By using creative methods, discretional activity classes, and programs to dispose of food and drink waste from students schoolmeals, and at the same time conduct and teach environmental education classes. To achieve this, students were given ten class lessons in creative discretional activities. Students were given flowerpots containing earthworms and were instructed to raise them, using food and drink waste from school meals. Four classes who were participating in project were examined for changes from March to July 2005. As a result the environmental education classes through creative discretional activities didn't have any significant influence on the students environmental literacy. However it did make a difference to the student's in-terms of their ecological knowledge. The project using earthworms to dispose of food and waste drink showed a decrease of 15% of the amount of waste food and drink from school meals. Moreover student's environmental literacy had been significantly influenced about environmental sensibility, value and causes. Through this study I found that the project using earthworms to dispose of waste food and drink, and creative discretional activities as a lesson decreased the amount of food and drink waste at the school, and the changes to students concerns and understanding about environmental sensibility, value and the various causes of waste food and drink.

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가정에서의 음식물류 폐기물 처리에 대한 사용자 경험 연구 (A Study on the User Experience of Food Waste at Home)

  • 전은하;양승호
    • 한국융합학회논문지
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    • 제11권7호
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    • pp.79-87
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    • 2020
  • 음식물류 폐기물이 야기하는 환경오염 문제는 오랫동안 사회적인 문제였으나 2013년 런던협약 가입으로 인해 음·폐수 해양배출이 금지되면서 한층 심각해졌다. 최근 정부의 음식물류 폐기물 관련 종합 대책의 실시는 감량 성과와 자원화에 많은 기여를 하였으나 지속적으로 시행되지 못하였고 폐기물의 발생 분야별로 적절하게 대응하는 전략의 부족이 지적되었다. 많은 연구에서는 효과적인 감량 정책 시행을 위해서 무엇보다 시민의 참여가 중요하다고 강조하고 있다. 이 연구는 사용자 경험 분석을 기초로 음식물류 폐기물 처리기를 디자인하여 시민의 참여를 높이는 방안을 제안한다. 이를 위해 선행연구에 대한 다각적인 조사·분석, 표적 집단 인터뷰 및 사용자 여정지도를 포함한 사용자 경험연구를 통하여 디자인 개발 방향을 설정하였다. 연구 결과로 도출된 처리기는 폐기물의 수시 배출이 용이해지며 가정 내에서 음식물류 폐기물 배출 과정이 간단해진다. 또한 사용자와 폐기물이 직접적으로 접촉하는 순간은 처리기에 배출하는 시점으로 제한하여 사용자가 겪었던 부정적인 경험을 최소화함으로써 폐기물 감량을 위한 사용자의 적극적인 참여를 유도하였다.

대학생의 구내식당 이용실태 및 음식물쓰레기 감량에 대한 의식 조사 연구 (A Survey on the University Students′ Use of University Cafeteria and Perception for the Reduction of Food Wastes)

  • 한준표
    • 동아시아식생활학회지
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    • 제9권2호
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    • pp.125-134
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    • 1999
  • 대학 구내식당의 음식물쓰레기 감량을 위한 기초 자료를 제공하기 위하여 대학생의 구내식당의 이용실태 및 음식물쓰레기에 대한 의식 등을 조사한 결과는 다음과 같다. 1. 남녀 대학생들의 거주 형태는 자가가 62.2%로 가장 많았으며 건강상태는 건강하다고 응답한 경우가 62.7%이었다. 한 달 용돈은 10만원에서 20만원미만이 45.4%이었으며 한끼의 식사비용은 천원 이상 이천원 미만이 49.6%로 가장 많았다. 2. 구내식당의 이용빈도는 57.2%가 매일, 그리고 26.7%는 1주일에 2-3번 이용하였으며 좋아하는 음식은 77.1%가 한식이었고 식사형식은 65.1%가 정식을 선호하였다. 음식의 선택기준은 50.2%가 식단을 들었다. 구내식당을 이용하지 않는 이유는 35.3%가 '맛이 없어서'라고 응답하였고 그밖에 '식단이 다양하지 않아서' 21.6%, '위생적이지 않아서'가 11.8% 였다. 3. 평소의 식습관에서 남학생은 46.6%, 여학생은 15.5%만이 음식을 남기지 않는다고 응답하여 여학생들이 남학생들보다 음식을 남기는 비율이 높은 것으로 나타났다. 4. 5점 평점법으로 식사량 및 배식방법에 대한 만족도를 조사한 결과 남녀 학생 모두 모든 항목에서 평균점수가 3점 미만으로 만족도가 매우 낮았으며 전반적인 만족도는 남학생은 2.22, 여 학생은 2.39였다. 5. 잔반을 밥, 국, 반찬, 김치로 나누어 조사한 결과 대체로 국을 가장 많이 남겼으며 남학생의 대부분(85.7%)은 밥을 남기지 않는다고 하였으나 여학생은 종종 남기거나(50.6%), 항상 남기는(17.1%) 경우도 많은 것으로 나타났다. 6. 음식에 대한 선호도를 보면 국.찌개류로 육개장, 닭백숙, 곰국, 미역국, 된장찌개 등은 선호하였으나 배추국, 선지국, 곰국, 만두국 등은 싫어하였다. 반찬류로 불고기, 탕수육, 달걀찜, 장조림 등은 선호하였으나 젓갈, 고등어, 꽁치, 장아찌, 제육구이 등은 선호하지 않았고 밥.면류로는 김치볶음밥, 볶음밥, 불고기덮밥, 오므라이스, 소고기덮밥 순으로 선호하였고 잡탕밥, 김치볶음밥, 볶음밥, 하이라이스, 돈까스 등은 좋아하지 않았다. 7. 자주 이용되는 식품재료에서 싫어하거나 골라내는 식품을 조사한 결과 공통적으로 싫어하거나 골라내는 식품은 선지, 생강, 꽁치, 해파리, 쑥갓, 갈치, 연근, 마늘 등이었다. 8. 식사량을 감량하는데 대한 의견을 5점 평점법으로 조사한 결과 남학생의 경우는 밥, 반찬의 수. 반찬의 양을 줄이는 데 대하여 높은 불만을 나타내어 평균점수 1.54-l.60이었고 여학생의 경우는 반찬의 수감량에 평균 1.79를 나타내 감량에 높은 불만을 나타내었다. 9. 음식물쓰레기에 대한 인식을 5점 평점법으로 조사한 결과에서 '음식물쓰레기의 양을 줄여야 한다'는 남학생이 3.94, 여학생이 4.05, '재활용이 꼭 필요하다'는 남학생이 4.18, 여학생이 4.10, '음식물쓰레기에 대한 개선방안이 제시되면 적극 참여하겠다'에서는 남학생이 3.98, 여학생이 3.09으로 높은 점수를 나타내고 있으나 '평소 음식물쓰레기를 줄이기 위해 노력하고 있다'에서는 남학생이 3.36, 여학생이 3.09로 나타났다. 10. 음식물쓰레기 처리방법을 알고 있는 경우는 남학생이 18.3%, 여학생이 15.1%로 인지도가 매우 낮았으며 남녀 모두 사료화와 퇴비화를 가장 바람직한 음식물쓰레기 처리방법으로 생각하고 있었다.

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Electric power generation from treatment of food waste leachate using microbial fuel cell

  • Wang, Ze Jie;Lim, Bong Su
    • Environmental Engineering Research
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    • 제22권2호
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    • pp.157-161
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    • 2017
  • Simultaneous treatment of food waste leachate and power generation was investigated in an air-cathode microbial fuel cell. A TCOD removal efficiency of $95.4{\pm}0.3%$ was achieved for an initial COD concentration of 2,860 mg/L. Maximum power density ranged was maximized at $1.86W/m^3$, when COD concentration varied between 60 mg/L and 2,860 mg/L. Meanwhile, columbic efficiency was determined between 1.76% and 11.07% for different COD concentrations. Cyclic voltammetric data revealed that the oxidation peak voltage occurred at -0.20 V, shifted to about -0.25 V. Moreover, a reduction peak voltage at -0.45 V appeared when organic matters were exhausted, indicating that reducible matters were produced during the decomposition of organic matters. The results showed that it was feasible to use food waste leachate as a fuel for power generation in a microbial fuel cell, and the treatment efficiency of the wastewater was satisfied.

전북지역 공립학교에서의 음식물쓰레기 처리에 관한 실태 (A Study on Food-waste Management of Public School Food Service in Jeonbuk Province)

  • 정윤호;정수진;김수란;차연수
    • 대한영양사협회학술지
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    • 제14권1호
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    • pp.51-63
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    • 2008
  • The purpose of this study was to understand the management status of food wastes in school meal to find the effective ways that would reduce and recycle them. Data was collected using questionnaires from 223 school dietitians located in Jeonbuk area. The results were as followed : 1) Waste was managed by the dietitians(54.7%) and cook(42.2%). The waste disposal contract was made by dietitians(65.0%), executives(31.4%). Therefore, school dietitians had primary responsibilities in the waste management. 2) As disposal ways, 48.9% processed municipal solid waste and food waste together and 46.6% processed separately. 3) A half of schools(52.9%) produced food wastes weighed under 10$\sim$15kg daily and using food wastes as animal food for farms was most popular method to dispose(87.4%). 4) Reasons to have food-wastes were disliking the taste of menu(50.2%) and the inappropriate ways of dealing with remaining food(64.1%) and donating to food bank(33.6%) in order. 5) The suggested ways to reduce the food-waste was to improve on cooking method(72.2%), changing of portion size(61.0%), measuring the amount of leftover food(53.4%) and requesting cooperation to educators(52.9%). 6) The reported consequences of reducing the food waste were: lowered grocery expenses(46.2%), and inspiring students on helping environmental preservation(23.8%). Therefore, the administration should work on finding a method to reduce food-waste and a way to use these resources efficiently. It is important to induct student's attitude on recycling remaining products by using food bank via nutrition education. Dietitian also should consider to reduce the leftover of food by using a standardized recipe.

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