English  |  正體中文  |  简体中文  |  Items with full text/Total items : 66984/66984 (100%)
Visitors : 22923189      Online Users : 108
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
  • Adv. Search
    HomeLoginUploadHelpAboutAdminister Goto mobile version


    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/27241


    Title: Ultrasound-Assisted Plasma: A Novel Technique for Inactivation of Aquatic Microorganisms
    Authors: Chen,CW;Lee,HM;Chen,SH;Chen,HL;Chang,MB
    Contributors: 環境工程研究所
    Keywords: ESCHERICHIA-COLI;ELECTRIC-FIELD;DISCHARGES;DISINFECTION;COMBINATION;PRESSURE
    Date: 2009
    Issue Date: 2010-06-29 18:21:01 (UTC+8)
    Publisher: 中央大學
    Abstract: Nonthermal plasma and ultrasound are two techniques capable of microorganism inactivation in a liquid phase. However, the interaction between the two techniques is not yet understood. In this study, an ultrasound-assisted plasma (USaP) technique by combining the two means is proposed. A lab-scale USaP system was designed and experimentally tested. The inactivation experiments were conducted with various conditions of two types of electrode layout (submerged and hybrid reactors), aeration or not, and two microorganism species E. coli and yeast. For a 30-min treatment, the inactivation efficiencies with no aeration were 2-, 2-, and 6-log reductions for ultrasound, plasma, and ultrasound-assisted plasma, respectively; and with aeration were 2-, 6-, and 6-log reductions, respectively. The aeration greatly enhanced the inactivation efficiency for the plasma but not for the ultrasound or the ultrasound-assisted plasma. The influences of electrode layout and microorganism species were insignificant on the inactivation efficiency. On the other hand, for a submerged reactor without aeration, the inactivation efficiency achieved with ultrasound-assisted plasma (eta(USaP)) was not only greater than eta(ultrasound) or eta(plasma), but also greater than the summation of eta(ultrasound) and eta(plasma). Namely, a synergistic effect of ultrasound-plasma combination on the inactivation was observed. No such synergistic effect was observed in a hybrid reactor or in aeration cases. The synergism is speculatively a virtue of the ultrasonic-generated bubbles that easily induce plasma discharges, and thus enhance microorganism inactivation in water.
    Relation: ENVIRONMENTAL SCIENCE & TECHNOLOGY
    Appears in Collections:[環境工程研究所 ] 期刊論文

    Files in This Item:

    File Description SizeFormat
    index.html0KbHTML418View/Open


    All items in NCUIR are protected by copyright, with all rights reserved.

    社群 sharing

    ::: Copyright National Central University. | 國立中央大學圖書館版權所有 | 收藏本站 | 設為首頁 | 最佳瀏覽畫面: 1024*768 | 建站日期:8-24-2009 :::
    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback  - 隱私權政策聲明