Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an, 710055, PR China.
State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, PR China.
Bioresour Technol. 2020 Jul;308:123291. doi: 10.1016/j.biortech.2020.123291. Epub 2020 Apr 3.
This study investigated the combination of low-thermal and sodium dodecylbenzene sulfonate (SDBS) as a pretreatment method to improve the volatile fatty acids (VFA) production from waste activated sludge (WAS). The results showed that the maximum VFA yield of 320 ± 7.7 mg COD/g VS was obtained in the combined pretreatment (0.01 g SDBS/g TS + 70 °C for 60 min), which was 1.8, 1.7 and 4.0 times of that from sole low-thermal, sole SDBS and the control test. The mechanism study revealed the combined pretreatment had synergetic effect on enhancement of disintegration of WAS. Moreover, low-thermal exhibited greater performance on releasing organic matters, and SDBS accelerated hydrolysis and acidogenesis, thus contributing to the enhancement of VFA production in the combined pretreatment. The microbial community analysis demonstrated that the combined pretreatment increased the abundance of phyla Firmicutes which might be responsible for the improvement of VFA production.
本研究探讨了低热能和十二烷基苯磺酸钠（SDBS）联合预处理方法，以提高废活性污泥（WAS）中挥发性脂肪酸（VFA）的产量。结果表明，在联合预处理（0.01g SDBS/g TS+70°C 60min）中，最大 VFA 产量为 320±7.7mg COD/g VS，分别是单独低热能、单独 SDBS 和对照试验的 1.8、1.7 和 4.0 倍。机理研究表明，联合预处理对增强 WAS 的解体具有协同作用。此外，低热能在释放有机物方面表现出更大的性能，SDBS 加速水解和产酸，从而有助于提高联合预处理中的 VFA 产量。微生物群落分析表明，联合预处理增加了厚壁菌门的丰度，这可能是 VFA 产量提高的原因。
