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Performance and mechanisms of short-chain fatty acids production from waste activated sludge fermentation enhanced by pretreatment synergistic syngas
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Hui-jie TAN1, 2, De-lin YU1, Shen-zhuo LI1, Yan-qing DUAN3, Yao-li WEI1, Ai-juan ZHOU1, *, Xiu-ping YUE1
China Environmental Science | 2025, 45(5) : 2577 - 2586
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China Environmental Science | 2025, 45(5): 2577-2586
• Solid Waste •
Performance and mechanisms of short-chain fatty acids production from waste activated sludge fermentation enhanced by pretreatment synergistic syngas
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Hui-jie TAN1, 2, De-lin YU1, Shen-zhuo LI1, Yan-qing DUAN3, Yao-li WEI1, Ai-juan ZHOU1, *, Xiu-ping YUE1
Affiliations
  • 1.College of Civil Engineering, Taiyuan University of Technology, Taiyuan 030024, China
  • 2.Shanxi Shanan Lide Environmental Science & Technology Co., LTD, Taiyuan 030032, China
  • 3.Department of Environmental and Safety Engineering, Taiyuan Institute of Technology, Taiyuan 030008, China
Published: 2025-05-20
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To enhance the acid production efficiency of sludge anaerobic fermentation, based on the established evidence that the inclusion of syngas improved waste activated sludge（WAS）fermentation performance, this study investigated the effects of different chemical pretreatments combined with a syngas-mediated WAS fermentation system. The results showed that the free nitrous acid combined with peracetic acid（FNA/PAA）experimental group had the highest production of short-chain fatty acids（SCFAs）（（5520.20±204.99）mg COD/L）. However, the FNA/PAA group exhibited only 50.4% and 35.8% utilization rates for H2 and CO, respectively. In contrast, the TAP group demonstrated efficient utilization of syngas, with H2 and CO utilization rates reaching 99.8%and 95.8%, respectively. Moreover, the production of SCFAs in the TAP group achieved a significant level of（4663.67±163.86）mg COD/L. At the same time, the three-dimensional fluorescence spectrum showed that TAP group had better extracellular polymer stripping and WAS lysis efficiency. TAP group also enhanced the enrichment of acid-producing functional bacteria in the anaerobic fermentation process, and significantly increased the abundance of Firmicutes to 59.0%. In addition, Romboutsia, which can metabolize acetic acid, ethanol and H2, accounted for the highest proportion in alkali pretreatment（AP）and TAP groups（19.2% and 21.3%）.

waste activated sludge（WAS）  /  pretreatment  /  syngas  /  anaerobic fermentation  /  short-chain fatty acids（SCFAs）
Hui-jie TAN, De-lin YU, Shen-zhuo LI, Yan-qing DUAN, Yao-li WEI, Ai-juan ZHOU, Xiu-ping YUE. Performance and mechanisms of short-chain fatty acids production from waste activated sludge fermentation enhanced by pretreatment synergistic syngas[J]. China Environmental Science, 2025 , 45 (5) : 2577 -2586 .
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Year 2025 volume 45 Issue 5
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  • Receive Date：2024-09-20
  • Online Date：2026-03-18
  • Published：2025-05-20
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  • Received：2024-09-20
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Affiliations
    1.College of Civil Engineering, Taiyuan University of Technology, Taiyuan 030024, China
    2.Shanxi Shanan Lide Environmental Science & Technology Co., LTD, Taiyuan 030032, China
    3.Department of Environmental and Safety Engineering, Taiyuan Institute of Technology, Taiyuan 030008, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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