%0 Journal Article
%T Improving phosphorus removal by pre-concentration of return sludge in novel oxidation ditch system<br>耦合回流污泥预浓缩系统的新型氧化沟工艺强化除磷
%A Xu Li
%A Liu Wei
%A Jia Chuan
%A Shen Changming
%A Yang Dianhai
%A <br>徐立
%A 刘巍
%A 贾川
%A 沈昌明
%A 杨殿海
%J 环境工程学报
%D 2012
%I 
%X In order to solve the problem that the traditional "anaerobic zone + oxidation ditch (OD)" process had a low phosphorus removal efficiency on treating low-carbon municipal wastewater, a novel OD integrated return activated sludge (RAS) pre-concentration system was adopted in this pilot-scale study. RAS pre-concentration system was adopted for promoting the phosphorus removal efficiency through varying the RAS pre-concentration ratio in this process. The results showed that under the optimal RAS pre-concentration ratio(55%)operational condition, effluent TP concentration was 0.92 mg/L, and the removal rate of TP was 67.5%, which increased by 24.3%, 27.3%, 8.2% and 28.6% comparing with the different operations in the RAS pre-concentration ratios of 100%, 70%, 50% and 30%, respectively. Obviously, it improved the effect of the phosphorus removal. Otherwise, ORP (oxidation reduction potential) could predict secondary phosphorus release and denitrification react degree in pre-anoxic tank, so it could be the control parameter to regulate the optimal RAS pre-concentration ratio automatically.
%K RAS pre-concentration
%K enhanced phosphorus removal
%K nitrate
%K OD<br>回流污泥预浓缩
%K 强化除磷
%K 硝酸盐
%K 氧化沟
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=92E6F4267FD4CBCB51B1E49E014D8054&jid=3567BD61129AA59043F5DE01F8815DB5&aid=66FD72374B2E351FFD3E8278EE58708B&yid=99E9153A83D4CB11&vid=B31275AF3241DB2D&iid=9CF7A0430CBB2DFD&sid=8C9BD208C716E59D&eid=3D581F110273872E&journal_id=1673-9108&journal_name=环境工程学报&referenced_num=0&reference_num=17