• 제목/요약/키워드: Environmental engineering

검색결과 35,978건 처리시간 0.065초

생활폐기물(生活廢棄物) 소각(燒却) 처리공정(處理工程)의 전과정(全科程) 평가(平價)에 의한 비교(比較) (Comparison of the Incineration Processes of Domestic Wastes Based on Life Cycle Assessment)

  • 정우정;이상돈;김동수
    • 환경영향평가
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    • 제14권6호
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    • pp.443-453
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    • 2005
  • For the purpose of the comparative environmental estimation of the incineration processes for domestic wastes, environmental impacts for several incineration processes for one ton of domestic wastes have been estimated by employing life cycle assessment as the environmental impact assessment method. The scheme of minimum production of environmental pollutants has been considered for three different incineration processes. The evaluation for latent influence on environment was carried out by using CML(Center of Environmental Science) method which was developed by University of Leyden in Netherlands based on the equivalency factor suggested by Korea Accreditation Board. The result of life cycle assessment has showed that the total cost analysis according to the amount of incinerating waste was dependent on the operating conditions of incineration process. In addition, the annual running cost for the incineration of one ton of wastes was estimated to be negatively dependent on the amount of wastes. The degree of environmental pollution was mainly due to the kinds of the wastes rather than by the amount of wastes.

Evaluation of a moving bed biofilm reactor for simultaneous atrazine, carbon and nutrients removal from aquatic environments: Modeling and optimization

  • Derakhshan, Zahra;Ehrampoush, Mohammad Hassan;Mahvi, Amir Hossein;Dehghani, Mansooreh;Faramarzian, Mohammad;Ghaneian, Mohammad Taghi;Mokhtari, Mehdi;Ebrahimi, Ali Asghar;Fallahzadeh, Hossein
    • Journal of Industrial and Engineering Chemistry
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    • 제67권
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    • pp.219-230
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    • 2018
  • The present study examined a moving bed biofilm reactor (MBBR) bioreactor on a laboratory scale for simultaneous removal of atrazine, organic carbon, and nutrients from wastewater. The maximum removal efficiency of atrazine, chemical oxygen demand (COD), total phosphorus (TP) and total nitrogen (TN) were 83.57%, 90.36%, 90.74% and 87.93 respectively. Increasing salinity up to 40 g/L NaCl in influent flow could inhibit atrazine biodegradation process strongly in the MBBR reactor.Results showed that MBBR is so suitable process for efficiently biodegrading of atrazine and nitrogen removal process was based on the simultaneous nitrification-denitrification (SND) process.

스퍼터링 니켈박막 연료극 적용 수소공급 저온 세라믹 연료전지의 초기작동 안정성 평가 (Evaluation of Initial Operation Stability of Hydrogen-Fueled, Low-Temperature Solid Oxide Fuel Cell with Sputtered Ni Thin-Film Anode)

  • 지상훈;김원재;한상종;장향연;박나리;김미선;강성원;임현만;정진홍;안광호;미라툴 매크피로;차석원
    • 한국수소및신에너지학회논문집
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    • 제33권6호
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    • pp.743-748
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    • 2022
  • The initial operation stability of hydrogen-fueled, solid oxide fuel cell with Ni thin-film anode fabricated by direct current sputtering was evaluated in terms of electrochemical properties such as peak power density, open circuit voltage, overpotential, and alternating current impedance at 500℃. Hydrogen and air were used as anode fuel and cathode fuel, respectively.