Nitrogen Removal by Simultaneous Nitrification and Denitrification via Nitrite in a Sequence Hybrid Biological Reactor  

作　　者：王建龙 彭永臻 王淑莹 高永青 

机构地区：[1]College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100022, China

出　　处：《Chinese Journal of Chemical Engineering》2008年第5期778-784,共7页中国化学工程学报（英文版）

基　　金：the National Key Project of Scientific and Technical Supporting Program of Ministry of Science and Technology ofChina(2006BAC19B03);Academic Human Resources Development in Institutions of Higher Leading under the Jurisdiction ofBeijing Municipality;the Specialized Research Fund for the Doctoral Program of Higher Education of China(20060005002).

摘　　要：Sequence hybrid biological reactor （SHBR） was proposed, and some key control parameters were investigated for nitrogen removal from wastewater by simultaneous nitrification and denitrification （SND） via nitrite. SND via nitrite was achieved in SHBR by controlling demand oxygen （DO） concentration. There was a programmed decrease of the DO from 2.50 mg·L^-1 to 0.30 mg·L^-1, and the average nitrite accumulation rate （NAR） was increased from 16.5% to 95.5% in 3 weeks. Subsequently, further increase in DO concentration to 1.50 mg·L^-1 did not destroy the partial nitrification to nitrite. The results showed that limited air flow rate to cause oxygen deficiency in the reactor would eventually induce only nitrification to nitrite and not further to nitrate. Nitrogen removal efficiency was increased with the increase in NAR, that is, NAR was increased from 60% to 90%, and total nitrogen removal efficiency was increased from 68% to 85%. The SHBR could tolerate high organic loading rate （OLR）, COD and ammonia-nitrogen removal efficiency were greater than 92% and 93.5%, respectively,, and it even operated under low DO concentration （0.5 mg·L^-1） and maintained high OLR （4.0 kg COD·m^-3·d^-1）. The presence of biofilm positively affected the activated sludge settling capability, and sludge volume index （SVI） of activated sludge in SHBR never hit more than 90 ml·L^-1 throughout the experiments.顺序混血儿生物反应堆(SHBR ) 被建议，并且一些关键控制参数被同时的氮的硝化作用和 denitrification (SND ) 经由亚硝酸根从废水为氮移动调查。经由亚硝酸根的 SND 被控制需求氧在 SHBR 完成() 集中。有从 2.50 mg 路 L 的 DO 的规划减少 ? 1 ～ 0.30 mg 路 L ? 1，并且平均亚硝酸根累积率(NAR ) 在 3 个星期内从 16.5% ～ 95.5% 被增加。随后，进一步增加在做集中到 1.50 mg 路 L ? 1 没破坏部分氮的硝化作用到亚硝酸根。结果显示出那有限空气流动率到在反应堆的氧缺乏将最后导致的原因仅仅氮的硝化作用到亚硝酸根并且不进一步。氮移动效率随 NAR 的增加被增加，也就是说， NAR 从 60% ～ 90% 被增加，并且全部的氮移动效率从 68% ～ 85% 被增加。 SHBR 能容忍分别地，高器官的装载率( OLR )，货到付款和氨氮移动效率比92%和93.5%大并且它甚至操作了在下面低做集中( 0.5 mg 路L ? 1 )并且维持的高 OLR ( 4.0 kg 货到付款 路m ? 3 路d ? 1 )。biofilm 的存在断然影响了在从来没撞击的 SHBR 解决能力，和激活的污泥的污泥体积索引(SVI ) 的激活的污泥超过 90 ml 路 g ? 1 在整个实验。

关 键 词：nitrogen removal simultaneous nitrification and denitrification nitrite accumulation demand oxygen PH 

分 类 号：TQ028[化学工程]