%0 Journal Article
%T Study on Treatment of Coking Wastewater by A/O Process of Biological Filter<br>生物滤池A/O工艺处理焦化废水研究
%A LAI Peng
%A ZHAO Hua-zhang
%A YE Zheng-fang
%A NI Jin-ren
%A ZENG Ming
%A <br>赖鹏
%A 赵华章
%A 叶正芳
%A 倪晋仁
%A 曾明
%J 环境科学
%D 2007
%I 
%X Coking wastewater was treated by A/O process of biological filter with a special kind of carrier. The wastewater contained much more phenolic compounds with about 2000 mg/L of COD and 260 mg/L of NH4+ -N. The A/O system could achieve average removal efficiencies of 87.0% and 91.6% for COD and NH4+ -N, respectively, when HRT was 60 h. The NH4+ -N in the effluent could meet the first level of National Discharge Standard at optimal operation condition. The phenolic compounds with low molecular weight could be fully biodegraded by A/O system. The organic compounds in the effluent were in the relative molecular weight range of 10,000-30,000 and contained --OH, C==O, C--O and phenyl group. Based on the support and protection of the carrier, a great number of microorganisms adhered and immobilized on the outer and inner surface of carrier, which contributed to a simultaneous removal of COD, NH4+ -N and TN. The A/O system biological filter showed a characteristic of steady performance and resistance ability during the operation period.
%K biological filter
%K A/O system
%K immobilization
%K coking wastewater<br>生物滤池
%K A/O系统
%K 固定化
%K 焦化废水
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=64CD0AA99DD39F69401C615B85F123EF&aid=9B38E12F6A95D2AA4EBB21A9351DF608&yid=A732AF04DDA03BB3&vid=D3E34374A0D77D7F&iid=59906B3B2830C2C5&sid=24AB12C2044E792E&eid=D40EDD5739609615&journal_id=0250-3301&journal_name=环境科学&referenced_num=0&reference_num=24