• 제목/요약/키워드: liquid waste

검색결과 590건 처리시간 0.023초

폐수중 액체막에 의한 페놀의 이동 (Transport of Phenol in Waste Water Through Liquid Surfactant Membrane)

  • 우인성;김병석;김윤선
    • 한국안전학회지
    • /
    • 제5권3호
    • /
    • pp.39-43
    • /
    • 1990
  • The transport of phenol from waste water through the liquid surfactant membrane containing Aliquat 336 as a carrier was analyzed by a theoretical model. Extraction experiments was carried out to investigate the effect of process parameters, such as mixing intensity, concentration of sodium hydroxide in internal aqueous solution, and counter anions, and initial phenol concentration in waste water at $25^{\circ}C$. It was found that transport rate of phenol increased with increasing pH differents. The transport rate of phenol in waste water was influenced by counter anions.

  • PDF

하나로의 방사성 폐기물 발생 현황 (The Status of Radioactive Waste Generation in HANARO)

  • 강태진;임인철;최호영;이용섭
    • 한국방사성폐기물학회:학술대회논문집
    • /
    • 한국방사성폐기물학회 2004년도 학술논문집
    • /
    • pp.377-385
    • /
    • 2004
  • 하나로의 출력운전이 시작된 이후 1996 년부터 2003 년까지 하나로에서 발생한 방사성폐기물의 양을 성상별로 정리하였다. 이 기간 동안 고체 폐기물과 액체 폐기물은 각각 $72,999{\ell}$, $263,576{\ell}$가 발생하였으며 원자로실 및 RCI 굴뚝을 통해 환경으로 방출된 기체 방사성 폐기물은 Ar-41이 1,225.6 Ci, I-131이 1.612E-2 Ci, H-3이 210 Ci 인 것으로 나타났다.

  • PDF

혼합 산업폐수의 질소제거를 위한 외부 탄소원 투입과 물질수지: 실증실험 (Nitrogen Removal from a mixed Industrial Wastewater using Food-Waste Leachate and Sugar Liquid Waste as External Carbon Sources: Full-Scale Experiment)

  • 이몽학;안조환;이정훈;배우근;심호재
    • 한국물환경학회지
    • /
    • 제28권5호
    • /
    • pp.663-668
    • /
    • 2012
  • The feasibility of enhancing biological nutrient removal from an industrial wastewater was tested with food waste leachate and sugar liquid waste as external carbon sources. Long term influences of adding external carbon sources were investigated to see how the biological nutrient removal process worked in terms of the removal efficiency. The addition of the external carbons led to a significant improvement in the removal efficiency of nutrients: from 49% to approximately 76% for nitrogen and from 64% to around 80% for phosphorus. Approximately, 20% of the removal nitrogen was synthesized into biomass, while the remaining 80% was denitrified. Though the addition of external carbon sources improved nutrient removal, it also increased the waste sludge production substantially. The optimal observed BOD/TN ratio, based on nitrogen removal and sludge production, was around 4.0 in this study.

WASTE MANAGEMENT IN DECOMMISSIONING PROJECTS AT KAERI

  • Hong Sang-Bum;Park Jin-Ho
    • 한국방사성폐기물학회:학술대회논문집
    • /
    • 한국방사성폐기물학회 2005년도 Proceedings of The 6th korea-china joint workshop on nuclear waste management
    • /
    • pp.290-299
    • /
    • 2005
  • Two decommissioning projects are carried out at the KAERI (Korean Atomic Energy Research Institute), one for the Korea research reactors, KRR-1 and KRR-2, and another for the uranium conversion plant (UCP). The concept of the management of the wastes from the decommissioning sites was reviewed with a relation of the decommissioning strategies, technologies for the treatment and the decontamination, and the characteristics of waste. All the liquid waste generated from KRR-1 and KRR-2 decommissioning site is evaporated by a solar evaporation facility and all the liquid waste from the UCP is treated together with lagoon sludge waste. The solid wastes from the decommissioning sites are categorized into three groups; not contaminated, restricted releasable and radioactive waste. The not-contaminated waste will be reused and/or disposed at an industrial disposal site, and the releasable waste is stored for the future disposal at the KAERI. The radioactive waste is packed in containers, and will be stored at the decommissioning sites till they are sent to a national repository site. The reduction of the radioactive solid waste is one of the strategies for the decommissioning projects and could be achieved by the repeated decontamination. By the achievement of the minimization strategy, the amount of radioactive waste was reduced and the disposal cost will be reduced, but the cost for manpower, for direct materials and for administration was increased.

  • PDF

폐CNT와 전도촉진재를 혼입한 시멘트 모르타르 블록의 발열 전도 특성 (Heating Transferring Charcteristics of Cement Mortar Block with Waste CNT and Conduction Activator)

  • 구현철;김운학;오홍섭
    • 한국건설순환자원학회논문집
    • /
    • 제10권2호
    • /
    • pp.176-183
    • /
    • 2022
  • 저전력 사용이 가능한 발열콘크리트를 제작하기 위하여 시멘트 모르타르에 고순도 폐CNT를 혼입하였으며, 모르타르의 전도율을 향상시키기 위하여 압축강도를 제어하는 수준에서 탄소섬유와 폐음극재를 활용하고자 하였다. 사용된 폐CNT는 다중벽 CNT의 함유량이 많은 것으로 분석되었고, 모르타르 배합시 분산성을 높이기 위하여 액상형으로 치환하여 사용하였다. 모르타르 발열시 태양광 등에 의한 소형 자가발전 설비를 활용하고 전자파를 최소화하기 위하여 DC 24 V이하의 전력 사용시의 모르타르의 온도 변화를 평가하였다. 액상형 폐CNT를 적용하고, DC 24 V의 전압을 도입한 경우 200 × 100 × 50 mm 블럭 시험편에서 60 ℃까지 상승하였으며, 액상형 폐CNT와 탄소섬유, 폐음극재를 모두 사용한 경우에는 DC 12 V에서도 55 ℃이상까지 온도가 상승하여 현장 적용성이 충분한 것으로 판단되었다. 특히 발열에너지 변화량에 있어서도 다른 변수들과 비교하여 효과적인 것으로 나타났다.

Extraction behaviors of platinum group metals in simulated high-level liquid waste by a hydrophobic ionic liquid bearing an amino moiety

  • Wu, Hao;Kim, Seong-Yun;Takahashi, Tadayuki;Oosugi, Haruka;Ito, Tatsuya;Kanie, Kiyoshi
    • Nuclear Engineering and Technology
    • /
    • 제53권4호
    • /
    • pp.1218-1223
    • /
    • 2021
  • A hydrophobic ionic liquid including an amino moiety ([DiOcAPmim][NTf2]) was synthesized. Its extraction behaviors towards Pd(II), Ru(III), Rh(III) were investigated in nitric acid aqueous solution as a function of contact time, effect of concentration of nitric acid, effect of temperature, and effect of co-existing metal ions. The extraction kinetics of Pd(II) was fairly fast and extraction equilibrium can be attained within only 5 min under the [HNO3] = 2.05 M. When [HNO3]< 1 M, the extraction percentage of Pd(II), Ru(III), Rh(III) were all above 80%. When [HNO3] reached 2 M, all of the extraction percentage decreased and in an order of Pd(II)>Ru(III)>Rh(III). When [HNO3]> 2 M, the extraction performance gradually recovered. The effect of temperature can slightly affect the extraction performance of Pd(II). Furthermore, in simulated high-level liquid waste, [DiOcAPmim][NTf2] showed a better preference towards Pd(II) under the interference of various other co-existing metal ions.

메탄발효폐액(醱酵廢液)의 비료화(肥料化)에 관(關)한 연구(硏究) -II. 폐액시용(廢液施用)이 목초(牧草)의 화학성분(化學成分), 가소화건물(可消化乾物) 및 Net Energy에 미치는 영향(影響) (Utilization of Liquid Waste from Methane Fermentation as a Source of Organic Fertilizer -II. Effect of Liquid Waste on Chemical Components, Digestible Dry Matter and Net Energy of Pasture Mixtures)

  • 신제성;김정갑;임동규;한기학
    • 한국토양비료학회지
    • /
    • 제20권2호
    • /
    • pp.147-151
    • /
    • 1987
  • 메탄발효폐액(醱酵廢液)의 시용(施用)이 목초(牧草)의 화학성분(化學成分), 가소화건물수량(可消化乾物收量) 및 에너지가치(價値)에 미치는 효과구명(效果究明)을 위하여 Orchardgrass, Tall fescue, Kentucky bluegrass 및 Ladino clover가 혼파(混播)된 초지(草地)에서 수행(遂行)된 시험결과(試驗結果)를 요약(要約)하면 다음과 같다. 1. 메탄발효폐액시용(醱酵廢液施用)으로 목초(牧草)의 조단백질(粗蛋白質) 및 조회분함량(粗灰分含量)은 증가(增加)되었으나 가용성무질소물(可溶性無窒素物)(N-free extracts)은 약간(若干)의 감소(減少)가 있었다. 조지방(粗脂肪) 및 조섬유함량(粗纖維含量)은 시비방법(施肥方法)에 따라 큰 차이(差異)를 나타내지 않았다. 2. 목초(牧草)의 NDF (Neutral Detergent Fiber) 및 ADF (Acid Detergent Fiber)는 폐액시용량(廢液施用量)이 증가(增加)됨에 따라 감소(減少)되는 경향(傾向)이었다. 폐액시용(廢液施用)으로 Cell-Wall Constituents 중(中) Cellulose가 감소(減少)된 반면(反面) Hemicellulose는 약간(若干)의 증가(增加)를 보였다. 3. 초지(草地)에 대한 폐액적량(廢液適量)은 42 MT/10a으로 이때의 가소화건물(可消化乾物)은 405.0 kg/10a을 생산(生産) 3요소표준시비(要素標準施肥) (233.8 kg)에 비해 현저(顯著)히 높았다. Starch value 및 Net energy lactaction 수량(收量)에서도 각각(各各) 291.3 KStE 보다 및 3450 MJ-NEL/10a를 생산(生産) 3요소표준시비(要素標準施肥) 보다 각각(各各) 70% 및 64%가 증가(增加)되었다.

  • PDF

투과증발법에 의한 방사성폐액의 감용 (Volume Reduction of Radioactive Liquid Waste by Pervaporation Method)

  • 강영호;권선길;양영석;황성태;장인순
    • 공업화학
    • /
    • 제3권2호
    • /
    • pp.327-334
    • /
    • 1992
  • 저준위 방사성 액체폐기물의 새로운 감용방법으로써 cellulose acetate막을 사용한 투과증발법의 연구가 수행되었다. 실험결과에 의하면 일반적으로 유기물의 분리에 사용되는 투과증발법은 액체폐기물의 감용을 위한 제염효과가 우수하였고, 수분의 증발속도도 저준위 방사성 액체폐기물의 감용을 위해 널리 사용되는 자연증발에 비해 현저히 빨랐다. 또한 주입용액의 조건에 따른 실험결과를 토대로 투과증발특성을 평가하였으며, 투과증발량을 증가시키기 위해 cellulose acetate막의 최적제막조건을 설정하였다.

  • PDF