School of Environment, Henan Normal University, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Xinxiang 453007, PR China.
School of Environment, Henan Normal University, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Xinxiang 453007, PR China.
Bioresour Technol. 2021 Dec;342:126051. doi: 10.1016/j.biortech.2021.126051. Epub 2021 Sep 28.
The combination of persulfate (PDS) with micron-sized magnetite (FeO) was introduced into the process of anaerobic fermentation (AF) to scrutinize the short chain fatty acid (SCFA) production from waste activated sludge for the first time. The synergetic effect of PDS and FeO results in the promotion of intracellular and extracellular substance liberation, augment in key hydrolases activities, and enrichment of hydrolytic and acidifying microbial population. Meanwhile, carbohydrate, amino acid, and energy metabolism as well as enzymes, are considerably accelerated. Consequently, the maximum SCFAs yield is significantly enhanced to 391.25 mg COD/L on day 8 of AF with the addition of 0.3 g FeO/g SS and 0.5 g PDS/g SS, which was 2.39-folds than that of the control. The relative abundance of Actinobacteria were highly enriched and reached to 35.76% at the class level. This work affords an effective avenue to evidently boost the production of SCFAs from WAS via AF.
首次将过硫酸盐 (PDS) 与微米级磁铁矿 (FeO) 组合引入到厌氧发酵 (AF) 过程中，以研究从废活性污泥中生产短链脂肪酸 (SCFA)。PDS 和 FeO 的协同作用促进了细胞内和细胞外物质的释放，提高了关键水解酶的活性，丰富了水解和酸化微生物种群。同时，碳水化合物、氨基酸和能量代谢以及酶的活性也得到了极大的加速。因此，在添加 0.3 g FeO/g SS 和 0.5 g PDS/g SS 的条件下，AF 第 8 天的最大 SCFA 产量显著提高至 391.25 mg COD/L，是对照组的 2.39 倍。在属水平上，放线菌的相对丰度得到了高度富集，达到了 35.76%。这项工作为通过 AF 从废活性污泥中显著提高 SCFA 的产量提供了一条有效的途径。
