Effects of bacterial activity on estrogen removal in nitrifying activated sludge.
Effects of bacterial activity on estrogen removal in nitrifying activated sludge.
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DOI：
10.1016/j.watres.2007.04.028
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发表时间：
2007-07
期刊：
影响因子：
12.8
通讯作者：
Yong-xiang Ren;K. Nakano;M. Nomura;N. Chiba;O. Nishimura
中科院分区：
文献类型：
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作者：
Yong-xiang Ren;K. Nakano;M. Nomura;N. Chiba;O. Nishimura
研究了在不同基质、不同有机负荷和低温条件下，细菌活性对硝化活性污泥（NAS）降解雌酮（E1）、雌二醇（E2）、雌三醇（E3）和炔雌醇（EE2）的影响。异养菌在E1之前利用葡萄糖进行代谢。氨氧化细菌（AOB）的共代谢作用主导了NAS中E1、E2和EE2的降解。有机负荷越高，有机物转化率越高，氨氧化越少，E1、E2和EE2降解越少。NAS中E3的降解主要是由于异养生物的代谢。根据异养菌和AOB在4°C下的表观活性差异，可以确定AOB通过共代谢降解雌激素的过程。
The effects of bacterial activity on the degradation of estrone (E1), estradiol (E2), estriol (E3) and ethinylestradiol (EE2) in nitrifying activated sludge (NAS) were studied with different substrates and organic loading rates (OLRs) and low temperature conditions. Heterotroph was shown to have utilized glucose prior to E1 for metabolism. The co-metabolism of ammonia oxidizing bacteria (AOB) dominated the degradation of E1, E2 and EE2 in NAS. The higher the organic loading, the higher the rate of organic matter transformation, with less ammonia oxidation and less degradation of E1, E2 and EE2. The degradation of E3 in NAS was shown to be largely due to heterotroph metabolism. On the basis of the difference of apparent activity between heterotroph and AOB at 4°C, the process of estrogen degradation via the co-metabolism of AOB was able to be identified.