%0 Journal Article
%T Study of control strategy and simulation in anoxic-oxic nitrogen removal process
%A PENG Yong-zhen
%A WANG Zhi-hui
%A WANG Shu-ying
%A <br>PENG Yong-zhen
%A WANG Zhi-hui
%A WANG Shu-ying
%J 环境科学学报(英文版)
%D 2005
%I 
%X The control strategy and simulation of external carbon addition were specially studied in an anoxic-oxic(A/O) process with low carbon: nitrogen(C/N) domestic wastewater. The control strategy aimed to adjust the flow rate of external carbon dosage to the anoxic zone, thus the concentration of nitrate plus nitrite(NOx--N) in the anoxic zone was kept closed to the set point. The relationship was studied between the NOx--N concentration in the anoxic zone(S_ NO) and the dosage of external carbon, and the results showed that the removal efficiency of the total nitrogen(TN) could not be largely improved by double dosage of carbon source when S_ NO reached about 2 mg/L. Through keeping S_ NO at the level of about 2 mg/L, the demand of effluent quality could be met and the carbon dosage could be optimized. Based on the Activated Sludge Model No.1(ASM No.1), a simplified mathematical model of external carbon dosage was developed. Simulation results showed that PI controller and feed-forward PI controller both had good dynamic response and steady precision. And feed-forward PI controller had better control effects due to its consideration of influent disturbances.
%K ASM No
%K 1
%K biological nitrogen removal
%K external carbon addition
%K feed-forward PI control<br>生物氮迁移
%K 碳替代法
%K 反馈PI控制
%K 废水处理
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=6CB1530875F53489BF1E81BD87B7F5E6&aid=1DDFBF97EC34B5D015041BE71677EFBB&yid=2DD7160C83D0ACED&vid=BCA2697F357F2001&iid=38B194292C032A66&sid=F10601728A1E9BEA&eid=B7ACE2F11789CAE0&journal_id=1001-0742&journal_name=Journalofenvironmentalsciences(China)&referenced_num=0&reference_num=8