• 품질경영학회지
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• 제38권2호
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• pp.212-224
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• 2010

After the introduction of Volume-based Waste Fee System for municipal wastes, the disposal of food wastes became an issue in society. As this reason, recycling food wastes facilities play an important role such as converting of food waste into animal feed or composting of food waste. Therefore, there is need of efficiency measurement of the facilities to reduce the inefficiency of factors. The purpose of this paper is to make a reasonable suggestion for the improvement of inefficient recycling food wastes facilities. This paper assesses the relative efficiency of recycling food wastes facilities by examining the relationship between inputs and outputs in 41 facilities using data envelopment analysis(DEA). The result shows that 4 facilities whose values of CCR efficiency are 1, and 10 facilities whose values of BCC efficiency are 1, RTS indicates IRS of 17 facilities and CRS of 6 facilities.

• 한국방사성폐기물학회:학술대회논문집
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• 한국방사성폐기물학회 2003년도 가을 학술논문집
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• pp.701-706
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• 2003

A study on the electrosorption of U(VI) onto porous activated carbon fibers (ACFs) was performed to treat uranium-containing lagoon sludge. Effective U(Ⅵ) removal is accomplished when a negative potential is applied to the activated carbon fiber(ACF) electrode. For a feed concentration of 100mg/L, the concentration of U(VI) in the cell effluent is reduced to less than 1mg/L. The adsorbed uranium could be deserted from the ACF by passing a 1M NaCl solution through the cell and applying a positive potential onto the electrode. The regeneration of ACF from the cycling experiments was confirmed.

• Biotechnology and Bioprocess Engineering:BBE
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• 제6권6호
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• pp.376-385
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• 2001

Considerable attention has been focused in recent years upon the field of biosorption for the removal of metal ions from aqeous effluents. Compared to other technologies, the advan-tages of biosortption are the high purity of the treated waste water and the cheap raw material. Really, the first major challenge for the biosorption field is to select the most promising types of biomass. Abundant biomass types either generated as a waste by-product of large-scale industrial fermentations particularly fungi or certain metal-binding seaweeds have gained importance in re-cent years due to their natural occurrence, low cost and, of course good performance in metal biosorption. Industrial solutions commonly contain multimetal systems or several organic and in organic substances that form complexes with metals at relatively high stability forming a very complex environment. When several components are present, interference and competition phe-nomena for sorption sites occur and lead to a more complex mathematical formulation of the process. The most optimal configuration for continuous flow-biosorption seems to the packed-bed column which gets gradually from the feed to the solution exit end. Owing to the com-petitive ion exchange taking place in the column, one or more of the metals present even at trace levels may overshot the acceptable limit in the column effluent before the breakthrough point of the trargeted metal. Occurrence of 'overshoot's and impact on havey metal removal has not been analyzed enough. New trends in biosorption are discussed in this review.

• 한국산업정보학회논문지
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• 제27권4호
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• pp.105-114
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• 2022

국민 소득수준이 향상되고 주택의 도시화 및 경제속도가 빠르게 진행됨에 따라 주거용 생활 폐기물과 음식물류 폐기물이 급격하게 증가하고 있다. 우리나라에서는 1991년 개정된 "폐기물관리법"을 기초로 1995년 생활 폐기물 종량제가 시행되었다. 하지만 시행 이후에도 여전히 음식물류 폐기물의 악취 및 이를 위한 신속한 처리 과정이 사회적 문제로 지속되고 있다. 이러한 이유로 음식 쓰레기 재활용사업이 주목받고 있으며, 음식물류 폐기물의 사료화, 퇴비화, 기타자원화 등 자원 재활용하는 역할에 관하여 본 논문에서는 자원화 과정의 비효율성을 줄이기 위한 음식물류 폐기물 재활용 시(時) 사업장의 경영성과를 향상시킬 요인이 무엇인가에 연구하였으며, 2020년 말 기준 국내 자원 재활용사업을 영위 중인 사업장 394개(공공 238개, 민간 156개) 중(中) 시설물 자료가 미흡한 업체를 제외, 전국 33개 시설 사업장의 투입물과 산출물의 관계를 "자료포락분석"(DEA:Data Envelopment Analysis)을 통해 조사하고, 음식물류 폐기물 시설의 상대적 경영성과에 중요한 역할이 무엇인가에 대하여 연구하였다. 음식물류 폐기물 재활용 사업을 영위 중인 업체의 업력, 시설용량, 자본금, 기계장치가 매출액에 미치는 영향이 무엇인가를 가설로 검증한다.

• 한국미생물·생명공학회지
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• 제22권6호
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• pp.643-645
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• 1994

Chitin and chitosan has been almost neglected until 1960s, although they are the second largest biomass on earth. Their major use were as a natural flocculant for waste-water treatment, and partially used in the areas of food, feed industry, cosmetics and medicine. Possible sources of chitin among biomass were tested, and antibacterial activity and viscosity-concentration relation- ship of diluted acidic solution were examined.

• 공업화학
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• 제27권4호
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• pp.371-379
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• 2016

사용 후 발생되는 폐 LCD판넬용 유리의 재활용 방안을 마련하고자 별도의 전처리 없이 폐 LCD판넬을 습식분쇄함으로서 발포체 제조용 원료유리로 사용가능한 폐 붕규산유리의 회수 방법을 조사하였으며, 이렇게 회수된 폐 붕규산유리를 사용하여 발포체의 제조를 시도하였다. 입도 270 mesh 이하의 크기로 분쇄 조절된 폐 붕규산유리를 대상으로 폐 붕규산분말 100 g에 대해 발포제로서 탄소분을 0.3 중량 분율, 추가 발포조제로서 $Na_2CO_3$, $Na_2SO_4$, $CaCO_3$를 각각 1.5 중량 분율이 되도록 첨가한 원료 유리분말을 발포소성온도 $950^{\circ}C$에서 20 min간 발포를 진행함으로서 밀도가 $0.3g/cm^3$ 이하되는 발포체를 제조할 수 있었다. 또한 원료 유리에 추가적으로 $SiO_2$ 또는 $H_3BO_3$를 첨가함으로서 얻어지는 발포체에 효과적으로 개기공을 형성할 수 있었으며, 개기공의 형성은 흡음 등 새로운 기능을 가진 발포체의 제조 가능성을 보여주었다.

• 한국초지조사료학회지
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• 제20권3호
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• pp.169-176
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• 2000

This experiment was carried out to investigate the effects of application levels of food waste compost andmineral nitrogen in 3 cuttings per annurn on the nutritive value and nutrient yields of orchardgrass (Dactylisglomerata L.). Annual food waste compost (FWC) and mineral nitrogen were applied at levels of 0, 10, 20,40 and 60 ton ha-', and 0, 90, 180 and 270 kg ha-', respectively. The contents of crude protein (CP, %) oforchardgrass were significantly higher at the application levels of 40 ton ha-' yr-' by FWC than those atapplication levels of 0 ton ha-' yr-' (p<0.05), the contents of neutral detergent fiber (NDF, %), acid detergentfiber (ADF, %) and hemicellulose were also higher in FWC applied plots, except for the FWC levels of 10and 60 ton ha-' yr-'. The contents of total digestible nutrient (TDN, %) and relative feed value (RFV) oforchardgrass were significantly higher at FWC levels of 10 and 60 ton ha-' yr-' than at levels of 0 ton ha"yr-'. Annual yields of CP and TDN were increased with increase the FWC levels. The highest contents ofCP of orchardgrass were obtained at 1st cut, NDF and ADF at 2nd cut. As the mineral nitrogen fertilizationwas increased, the contents of CP, NDF, ADF and hemicellulose of orchardgrass were significantly increased,but TDN and RFV were decreased. .Annual yields of CP and TDN of orchardgrass were significantlyincreased with increase the mineral nitrogen fertilization.(Key words : Food waste compost, Mineral nitrogen, Crude protein, Neutral detergent fiber, Acid detergentfiber)rgent fiber, Acid detergent fiber)

• 유기물자원화
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• 제5권2호
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• pp.7-16
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• 1997

일일 처리용량이 10톤인 난지도 음식쓰레기 퇴비화시범시설을 대상으로 하여 퇴비화과정동안의 물리 화학적 특성변화에 관한 연구를 수행하였다. 투입되는 음식쓰레기의 수분함량은 79% 내외였으며 공극 개량제로 폐목재를 샤용하였다. 퇴비화가 진행되는 동안 수분은 최종 31%로 감소하였으며 밀도에 상당한 영향을 주었다. 또한, 전기전도도는 퇴비화가 진행되는 동안 증가하는 경향을 보였다. 퇴비화가 진행되는 동안 VS와 TOC의 감소율은 각각 40%와 28%를 보였으며 VS와 TOC와의 상관관계는 유의수준에서 1.00으로 매우 상관성이 높았다. 고형물 C/N비와 물용출 C/N비 모두 숙성퇴비의 값을 보였다. 또한, $CO_2$, $O_2$ 등의 가스조성을 분석한 결과 퇴비화는 호기성조건하에서 정상적으로 진행되고 있었다.

• 유기물자원화
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• 제21권4호
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• pp.50-61
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• 2013

교내 식당에서 분리 수거된 음식물류 폐기물에서 재생 에너지인 메탄가스를 생산하기 위해 혐기성 소화시스템에 대한 연구가 수행되었다. 1차 실험에서 침출수 인발/반송도 없고 혼합도 없는, 침출수 인발/반송은 없고 혼합이 있는, 침출수 인발/반송은 있고 혼합이 없는, 그리고 침출수 인발/반송은 있고 혼합이 있는 4개의 혐기성 시스템에서 침출수 인발/반송은 있고 혼합이 없는 시스템에서 가스발생이 가장 많은 것으로 나타났다. 반응조 혼합이 없고 침출수 인발/반송이 수행되는 시스템에서는 침출수의 반응조 내 침출수 유출속도가 빠른 경우에 혐기성 반응이 활발히 일어난 것으로 관찰되었다. 가스수집기 무게가 1kg이고 음식물류 폐기물 C/N비가 10이상이 되는 경우 혐기성 반응조의 가스가 소모되어 가스수집기에 부압이 걸리는 것이 관찰되었는데, 이에 대한 원인을 밝히는 것이 음식물류 폐기물에서 재생에너지를 회수하는데 필수적이다.

• Asian-Australasian Journal of Animal Sciences
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• 제18권4호
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• pp.479-482
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• 2005

The nutritional worth of Sarson Saag Waste (SSW), a cannery waste, was assessed in comparison with conventional complete diet as a total mixed ration (TMR), and a conventional green fodder, Avena sativa. Each diet was offered ad libitum, supplemented with mineral mixture and common salt, to 4 male murrah buffaloes. The control TMR was made iso-nitrogenous to SSW. Simultaneously, each diet was offered to 3 rumen fistulated male buffaloes for assessing the biochemical changes in the rumen. The nutrient digestibility of unconventional SSW was comparable to that of conventional green fodder-A. sativa but significantly (p<0.05) higher than that of control TMR. The tri-chloro acetic acid (TCA) precipitable-N in the strained rumen liquor of animals fed SSW was considerably higher than that of animals fed A.sativa. The urinary excretion of total purine derivatives was comparable in animals fed SSW and conventional green fodder but significantly (p<0.05) higher than those fed conventional control TMR. The significantly (p<0.05) lower purine nitrogen index (PNI) in animals fed control TMR resulted in significantly (p<0.05) lower microbial protein synthesis than that in animals fed SSW and conventional green fodder. The N-excretion as per cent of nitrogen intake was significantly (p<0.05) lower in animals fed SSW as compared to either of the conventional feeds tested, resulting in significantly (p<0.05) higher Nretention and apparent biological value. SSW supplemented with mineral mixture could serve as an excellent source of nutrients for ruminants.