%0 Journal Article
%T Evaluation of oxygen transfer parameters of fine-bubble aeration system in plug flow aeration tank of wastewater treatment plant
%A Xiaohong Zhou
%A Yuanyuan Wu
%A Hanchang Shi
%A Yanqing Song
%A <br>Xiaohong Zhou
%A Yuanyuan Wu
%A Hanchang Shi
%A Yanqing Song
%J 环境科学学报(英文版)
%D 2013
%I 
%X Knowledge of the oxygen mass transfer of aerators under operational conditions in a full-scale wastewater treatment plant (WWTP) is meaningful for the optimization of WWTP, however, scarce to best of our knowledge. Through analyzing a plug flow aeration tank in the Lucun WWTP, in Wuxi, China, the oxygenation capacity of fine-bubble aerators under process conditions have been measured in-situ using the off-gas method and the non-steady-state method. The off-gas method demonstrated that the aerators in different corridors in the aeration tank of WWTP had significantly different oxygen transfer performance; furthermore, the aerators in the same corridor shared almost equal oxygen transfer performance over the course of a day. Results measured by the two methods showed that the oxygen transfer performance of fine-bubble aerators in the aeration tank decreased dramatically compared with that in the clean water. The loss of oxygen transfer coefficient was over 50% under low-aeration conditions (aeration amount <0.67 Nm3/hr). However, as the aeration amount reached 0.96 Nm3/hr, the discrepancy of oxygen transfer between the process condition and clean water was negligible. The analysis also indicated that the non-steady-state and off-gas methods resulted in comparable estimates of oxygen transfer parameters for the aerators under process conditions.
%K fine-bubble aerator
%K off-gas method
%K non-steady-state method
%K oxygen transfer parameters<br>fine-bubble
%K aerator
%K off-gas
%K method
%K non-steady-state
%K method
%K oxygen
%K transfer
%K parameters
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=6CB1530875F53489BF1E81BD87B7F5E6&aid=51EFA6F8AD100243BA6E717C2474BF6E&yid=FF7AA908D58E97FA&iid=0B39A22176CE99FB&sid=AF507FDD66D991DA&eid=DFEE4E8C33C95CEF&journal_id=1001-0742&journal_name=Journalofenvironmentalsciences(China)&referenced_num=0&reference_num=13