Hebei Key Laboratory of Close-to-Nature Restoration Technology of Wetlands, Hebei University, Baoding, 071002, China; School of Eco-Environment, Hebei University, Baoding, 071002, China; Institute of Xiong'an New Area, Hebei University, Baoding, 071002, China; School of Life Science, Hebei University, Baoding, 071002, China.
Hebei Key Laboratory of Close-to-Nature Restoration Technology of Wetlands, Hebei University, Baoding, 071002, China; School of Eco-Environment, Hebei University, Baoding, 071002, China; Institute of Xiong'an New Area, Hebei University, Baoding, 071002, China.
J Environ Manage. 2023 Aug 15;340:117996. doi: 10.1016/j.jenvman.2023.117996. Epub 2023 Apr 21.
Potassium ferrate (PF) pretreatment in anaerobic sludge and its potential influence mechanisms have received widely attention. This study investigated the coupling effect of PF loading on steel slag (SS) on excess sludge anaerobic fermentation. Results showed that SS loading increase the treatment performance of PF on short chain volatile fatty acids (SCFAs) production from anaerobic fermented sludge. It was showed that the modified PF loaded SS (MPF-SS) promoted the dissolution and release of organic substrates from intracellular to extracellular. Further exploration showed the promotion of PF and MPF-SS exposure to acid production microorganisms was much more than that to acid consumption microorganisms. MPF-SS addition can also effectively reinforce the carbohydrate transport, amino acid metabolism and the key enhanced genes associated with fatty acid biosynthesis pathways. This study fills the knowledge gap about modified PF on sludge treatment and also expands a new perspective for its application for sludge resource recovery.
高铁酸钾（PF）预处理厌氧污泥及其潜在影响机制受到广泛关注。本研究考察了 PF 加载到钢渣（SS）上对剩余污泥厌氧发酵的耦合效应。结果表明，SS 加载增加了 PF 对厌氧发酵污泥中短链挥发性脂肪酸（SCFAs）生成的处理性能。结果表明，改性 PF 负载 SS（MPF-SS）促进了有机基质从细胞内到细胞外的溶解和释放。进一步的探索表明，PF 和 MPF-SS 对产酸微生物的促进作用远大于对耗酸微生物的促进作用。MPF-SS 的添加还可以有效地加强碳水化合物的运输、氨基酸代谢以及与脂肪酸生物合成途径相关的关键增强基因。本研究填补了改性 PF 处理污泥方面的知识空白，也为其在污泥资源回收方面的应用提供了新的视角。
