Nitrification characteristics of PEG immobilized activated sludge at high ammonia and COD loading rates
Nitrification characteristics of PEG immobilized activated sludge at high ammonia and COD loading rates
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高氨氮和COD负荷率下PEG固定化活性污泥的硝化特性
DOI：
10.1016/j.desal.2007.01.150
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发表时间：
2008-03
期刊：
影响因子：
9.9
通讯作者：
XL Qiao, ZJ Zhang, QX Chen, YJ Chen
中科院分区：
文献类型：
--
作者：
XL Qiao, ZJ Zhang, QX Chen, YJ Chen
自养硝化细菌和异养细菌都是耗氧细菌。在常规活性污泥中，硝化活性随着COD和氨氮负荷的增加而急剧下降，这是因为大量含碳基质的存在往往会阻碍氧气用于硝化，或者高浓度的氨氮会损害生长速度相对较慢的硝化菌的代谢。PEG固定化活性污泥不仅能在高氨氮（大于500 mg/L）和高COD负荷下保持较高的硝化速率，而且能同时去除氨氮和COD。实验表明，硝化菌和异养菌可以在PEG基质和反应器中共存，正常运行。但未观察到明显的反硝化现象。考察了不同运行条件下固定化活性污泥的反应机理和硝化特性。对PEG凝胶的结构进行了讨论。
Autotrophic nitrifiers and heterotrophic bacteria are all oxygen-consuming bacteria. In conventional active sludge, nitrification activities decrease dramatically with increasing COD and ammonia loading rate, as the presence of a large amount of carbonaceous substrates often prevents oxygen being used for nitrification, or high concentration ammonia can harm the metabolism of nitrifiers, which has a relative slow growth rate. In our study, PEG immobilized activated sludge can not only maintain high nitrification rate at high ammonia (more than 500 mg/L) and COD loading rate, but also simultaneously remove ammonia and COD. Experiments demonstrated that nitrifiers and heterotrophic bacteria can coexist in the PEG matrix and reactor to function normally. However, no obvious denitrification phenomena could be observed. Various operational conditions, such as DO, COD and ammonia loading rate, are investigated to study the reaction mechanism and nitrification characteristics of the immobilized activated sludge. The structure of the PEG gel is also discussed.
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DOI：
10.1016/0922-338x(92)90228-m
发表时间：
1992
期刊：
Journal of Fermentation and Bioengineering
影响因子：
--
作者：
T. Sumino;Hiroki Nakamura;Mori Naomichi;Y. Kawaguchi
通讯作者：
T. Sumino;Hiroki Nakamura;Mori Naomichi;Y. Kawaguchi
影响因子：
4
作者：
J. Ling;Shulin Chen
通讯作者：
J. Ling;Shulin Chen
DOI：
--
发表时间：
1976
期刊：
Journal - Water Pollution Control Federation
影响因子：
--
作者：
A. Anthonisen;R. Loehr;T. Prakasam;E. G. Srinath
通讯作者：
A. Anthonisen;R. Loehr;T. Prakasam;E. G. Srinath
影响因子：
4.4
作者：
J. Carrera;T. Vicent;J. Lafuente
通讯作者：
J. Carrera;T. Vicent;J. Lafuente
影响因子：
12.8
作者：
Rostron, WM;Stuckey, DC;Young, AA
通讯作者：
Young, AA