State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science & Engineering, Tongji University, 1239 Siping Road, Shanghai, 200092, China.
CCCC National Engineering Research Center of Dredging Technology and Equipment Co., Ltd., Shanghai, 200082, China.
Environ Sci Pollut Res Int. 2024 Jul;31(33):45862-45874. doi: 10.1007/s11356-024-34281-y. Epub 2024 Jul 9.
Anaerobic digestion of waste activated sludge (WAS) was one of the directions of sludge treatment, but how to effectively improve the production of methane as a resource product of anaerobic digestion of sludge still needs further research. The study examined how the combination of potassium ferrate (PF) and thermal hydrolysis (TH) pretreatment affected methane production from sludge. The results demonstrated a positive synergistic effect on methane production with PF-TH pretreatment. Specifically, by employing a 0.05 g/g TSS (total suspended solids) PF in conjunction with TH at 80 °C for 30 min, the methane yield increased from 170.66 ± 0.92 to 232.73 ± 2.21 mL/g VSS (volatile suspended solids). The co-pretreatment of PF and TH has been substantiated by mechanism studies to effectively enhance the disintegration and biodegradability of sludge. Additionally, the variation of microbial community revealed an enrichment of active microorganisms associated with anaerobic digestion after treated with PF + TH, resulting in a total abundance increase from 11.87 to 20.45% in the PF + TH group.
厌氧消化废活性污泥（WAS）是污泥处理的方向之一，但如何有效提高甲烷作为污泥厌氧消化资源产物的产量仍需要进一步研究。本研究探讨了高铁酸钾（PF）和热水解（TH）预处理的组合如何影响污泥产甲烷。结果表明，PF-TH 预处理对甲烷生产具有积极的协同作用。具体而言，采用 0.05 g/g TSS（总悬浮固体）PF 与 80°C 下 TH 预处理 30 分钟，甲烷产量从 170.66±0.92 mL/g VSS（挥发性悬浮固体）增加到 232.73±2.21 mL/g VSS。通过机制研究证实，PF 和 TH 的共同预处理可有效增强污泥的解体和生物降解性。此外，微生物群落的变化表明，经过 PF+TH 处理后，与厌氧消化相关的活性微生物得到了富集，PF+TH 组的总丰度从 11.87%增加到 20.45%。
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