Ren Yong-Xiang, Nakano Kazunori, Nomura Munehiro, Chiba Nobuo, Nishimura Osamu
Graduate School of Engineering, Tohoku University. 6-6-06 Aoba, Sendai 980-8579, Japan.
Water Res. 2007 Jul;41(14):3089-96. doi: 10.1016/j.watres.2007.04.028. Epub 2007 May 8.
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 degrees C, the process of estrogen degradation via the co-metabolism of AOB was able to be identified.
研究了在不同底物、有机负荷率（OLR）和低温条件下，细菌活性对硝化活性污泥（NAS）中雌酮（E1）、雌二醇（E2）、雌三醇（E3）和乙炔雌二醇（EE2）降解的影响。结果表明，异养菌在利用E1进行代谢之前先利用了葡萄糖。氨氧化细菌（AOB）的共代谢主导了NAS中E1、E2和EE2的降解。有机负荷越高，有机物转化速率越高，氨氧化越少，E1、E2和EE2的降解也越少。NAS中E3的降解主要归因于异养菌代谢。基于4℃下异养菌和AOB表观活性的差异，确定了通过AOB共代谢降解雌激素的过程。
