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음식물 제로화 스마트 리사이클링 시스템을 적용한 자원순환 주거단지 구축·운영 사례
오정익(Oh, Jeong Ik),박이레(Park Ire) 대한설비공학회 2018 대한설비공학회 학술발표대회논문집 Vol.2018 No.6
Food waste has been often considered to be one of the most important factors ensuring quality of Korean residential environment. Recently, food waste has gained much attention since it’s seen as a biomass fuel reducing carbon emissions against. This study aims to suggest an innovative approach to producing a biomass fuel making use of food waste. This research introduces a zero food waste system (ZFWS) which utilizes a fermentation-extinction compost technique making use of bio wood-chips and at the same time this system is experimentally examined in the kitchen disposer in the households. For the applicability, ZFWS was installed in a large apartment complex and the performance of food waste treatment and management was examined. The on-site ZFWS was divided into three main parts; 1) a fermentation-extinction compost reactor where food waste was mixed with bio wood chips made up of complex enzyme and aseptic wood chips: 2) separation equipment of water from food waste in which an screw centrifugation technique was employed; and 3) a food waste slot into which kitchen disposer under the sink is installed. The field experiment had put 50kg food waste per day into ZFWS, and the food waste was reduced to 90% in weight. Furthermore, the by-products generated from fermentation-extinction compost reaction could meet the organic fertilizer criteria in Korea.
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음식물류폐기물 제로화 주거단지 구축 시나리오별 비용 및 환경효과 분석
오정익(Jeong-Ik Oh),윤은주(Eun-Joo Yoon),박이레(Ire Park),김영민(Yeong-Min Kim) 대한환경공학회 2016 대한환경공학회지 Vol.38 No.7
본 연구에서는 공동주택 단지에서의 음식물류폐기물을 수거․이송하여 대용량처리시설에 자원화 혹은 재활용하는 기존 방식과 발생지인 공동주택 내에서 처리하는 제안 방식을 가상하여 차량수거방식, 자동집하방식, 자동집하처리방식, 소규모분산처리방식, 오수처리연계방식으로 시나리오를 설정하고 각 시나리오별 초기 투자비용, 석유 사용량, 이산화탄소 배출량, 음식물류폐기물 처리 운영비용, 입주자 부담 관리비를 비교 분석하였다. 기존처리 방식에 비해 제안하는 소규모분산처리방식이 초기 투자비용, 연간 석유사용량, 이산화탄소 배출량이 가장 낮았으며 적용, 도입 가능성이 높았다. 음식물류폐기물처리 운영비용은 기존 처리방식과 비교하여 1톤당 334,465원(약 91%)이 절감되며 세대 당 월 1,500원인 입주자 부담 관리비용 또한 902원으로 약 40% 절감이 가능하다고 분석되었다. 각 시나리오별 초기 투자비용과 석유사용량, 이산화탄소 배출량을 비교한 결과, 초기 투자비용이 낮은 처리방식이 연료 사용량과 이산화탄소 발생량도 낮은 경향을 나타내었다. 초기 투자비용과 석유사용량, 이산화탄소 배출량이 가장 낮은 시나리오는 소규모분산처리방식이며 가장 높은 시나리오는 오수처리연계방식이었다. 연구의 공간적 범위를 공동주택 단지로 설정할 때 소규모분산처리방식이 음식물류폐기물 제로화 모델로서 가장 적합한 방식으로 판단된다. In this study, traditional treatment scenario of food wastes that collected and transported food waste is recycled in large treatment facilities and suggested treatment scenario of onsite zero discharge system that food waste is treated in housing complex were supposed. The scenarios were compared and analyzed by capital expenditure, oil consumption, CO₂ emission quantity, operating expenditure and management expenses. The capital expenditure, oil consumption and CO₂ emission quantity of small scale dispersion dealing method is the lowest compared to traditional treatment method. As a results, it is possible to obtain the effect that operating expenditure was reduced by 91% and management expenses was reduced by 40% with suggested treatment method. The treatment method that have low capital expenditure is tend to lower oil consumption and CO₂ emission quantity. The small scale dispersion dealing method have the lowest capital expenditure, oil consumption and CO₂ emission quantity and the linked method with sewage treatment have the highest expenditure and CO₂ emission quantity. Eventually, the optimal model of onsite zero discharge system in housing complex is small scale dispersion dealing method.
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