State Key Laboratory of Pollution Control and Resources Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai 200092, China.
Bioresour Technol. 2010 Sep;101(18):6902-9. doi: 10.1016/j.biortech.2010.03.124. Epub 2010 Apr 20.
In the presence of surfactant sodium dodecylbenzene sulfonate (SDBS) the hydrolysis products accumulation and the short-chain fatty acids (SCFA) production during waste activated sludge fermentation under mesophilic and thermophilic conditions was compared with that at room temperature. In order to understand the mechanism of significant amounts of mesophilic and thermophilic hydrolysis products and SCFA observed in the presence of surfactant, the kinetic models at different SDBS dosages were developed. It was found that SDBS increased the mesophilic and thermophilic hydrolysis rate significantly, and the maximum specific utilization of hydrolysis products increased at low SDBS and decreased at high one. However, the observed maximum specific utilization of SCFA decreased seriously with SDBS increase. In the presence of SDBS the decay rate of acidogenic bacteria not only was lower than that in the absence of SDBS but decreased with the increase of SDBS under either mesophilic or thermophilic conditions.
在十二烷基苯磺酸钠（SDBS）存在的情况下，比较了在中温和高温条件下以及在室温下，废活性污泥发酵过程中水解产物的积累和短链脂肪酸（SCFA）的产生。为了了解在表面活性剂存在下观察到的大量中温和高温水解产物和 SCFA 的机制，开发了不同 SDBS 剂量下的动力学模型。结果表明，SDBS 显著提高了中温和高温的水解速率，在低 SDBS 下最大比水解产物利用率增加，在高 SDBS 下则降低。然而，随着 SDBS 的增加，观察到的最大比 SCFA 利用率严重下降。在 SDBS 存在的情况下，产酸菌的衰减速率不仅低于无 SDBS 的情况，而且在中温和高温条件下，随着 SDBS 的增加而降低。
