• Title/Summary/Keyword: Environmental engineering

Search Result 35,688, Processing Time 0.062 seconds

Comparison of the Incineration Processes of Domestic Wastes Based on Life Cycle Assessment (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))

  • Jung, Woo-Jung;Lee, Sang-Don;Kim, Dong-Su
    • Journal of Environmental Impact Assessment
    • /
    • v.14 no.6
    • /
    • pp.443-453
    • /
    • 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.

  • PDF KSCI

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
    • /
    • v.67
    • /
    • pp.219-230
    • /
    • 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.

  • https://doi.org/10.1016/j.jiec.2018.06.032 인용 KSCI

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

  • SANGHOON JI;WEONJAE KIM;SANGJONG HAN;HYANGYOUN CHANG;NARI PARK;MISEON KIM;SUNGWON KANG;HYUNMAN LIM;JINHONG JUNG;KWANGHO AHN;MIRATUL MAGHFIROH;SUK WON CHA
    • Transactions of the Korean hydrogen and new energy society
    • /
    • v.33 no.6
    • /
    • pp.743-748
    • /
    • 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.

  • https://doi.org/10.7316/KHNES.2022.33.6.743 인용 PDF KSCI