%0 Journal Article
%T Applying real-time control to enhance the performance of nitrogen removal in CAST system
%A PENG Yong-zhen
%A WANG Shao-po
%A WANG Shu-ying
%A GAO Shou-you
%A <br>PENG Yong-zhen
%A WANG Shao-po
%A WANG Shu-ying
%A GAO Shou-you
%J 环境科学学报(英文版)
%D 2005
%I 
%X A bench-scale reactor(72 L) red with domestic sewage, was operated more than 3 months with three operation modes: traditional mode, modified mode and real-time control mode, so as to evaluate effects of the operation mode on the system performance and to develop a feasible control strategy. Results obtained from fixed-time control study indicate that the variations of the pH and oxidation-reduction potential(ORP) profiles can represent dynamic characteristics of system and the cycle sequences can be controlled and optimized by the control points on the pH and ORP profiles. A control strategy was, therefore, developed and applied to real-time control mode. Compared with traditional mode, the total nitrogen(TN) removal can be increased by approximately 16% in modified mode and a mean TN removal of 92% was achieved in real-time control mode. Moreover, approximately 12.5% aeration energy was saved in real-time control mode. The result of this study shows that the performance of nitrogen removal was enhanced in modified operation mode. Moreover, the real-time control made it possible to optimize process operation and save aeration energy.
%K cyclic activated sludge technology
%K biological nitrogen removal
%K real-time control
%K oxidation-reduction potential(ORP)<br>CAST系统
%K 实时控制模式
%K 总氮含量
%K 废水处理
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=6CB1530875F53489BF1E81BD87B7F5E6&aid=7929CEEFF83A1D9A410041C45559035C&yid=2DD7160C83D0ACED&vid=BCA2697F357F2001&iid=94C357A881DFC066&sid=FA98B938D085B826&eid=547991B346A6585E&journal_id=1001-0742&journal_name=Journalofenvironmentalsciences(China)&referenced_num=0&reference_num=14