%0 Journal Article
%T Technical modification of denitrification enhancement in T type oxidation ditches<br>T型氧化沟提高脱氮效率的技术改造
%A Luo Jianzhong
%A Su Weijian
%A Lu Jun
%A Guo Jieru
%A <br>罗建中
%A 苏伟健
%A 卢军
%A 郭洁茹
%J 环境工程学报
%D 2009
%I 
%X Though prolonging aeration time in side ditches, the technical modification of T type oxidation ditches of BOD biodegraded mode in the aspect of denitrification enhancement was constructed. Results proved that, when aeration time in side ditches was increased from 0.5 h to 1 h and radio of denitrification time to nitrification time, tDN/tN ,was changed from 0.56 to 0.50, percentage of nitrification was increased and ability of denitrification of the system was improved. After modification, concentration of NH3-N of outlet, 10.4 mg/L, dramatically lower than before, 15.5 mg/L, met discharged standards of Guangdong Province (DB 44/26-2001), and denitrification efficiency was dramatically enhanced from 52.1% to 68.3%. The problem of high concentration of NH3-N of outlet in wastewater plants was solved. With low investment and high efficiencies, the modification has certain of value of popularization and application.
%K T type oxidation ditches
%K denitrification
%K modification
%K aeration time<br>T型氧化沟
%K 脱氮
%K 改造
%K 曝气时间
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=92E6F4267FD4CBCB51B1E49E014D8054&jid=3567BD61129AA59043F5DE01F8815DB5&aid=147F615384C804CBC87377D07C99F323&yid=DE12191FBD62783C&vid=38B194292C032A66&iid=708DD6B15D2464E8&sid=BBCD5003575B2B5F&eid=B914830F5B1D1078&journal_id=1673-9108&journal_name=环境工程学报&referenced_num=0&reference_num=10