Acetate production;
Fe3O4;
Hydrolysis and acidification;
Waste activated sludge;
Dissimilatory iron reduction;
INTERSPECIES ELECTRON-TRANSFER;
FATTY-ACIDS PRODUCTION;
IMPROVE METHANE PRODUCTION;
EXCESS SLUDGE;
IV PILI;
DIGESTION;
PRETREATMENT;
ENHANCEMENT;
WATER;
ACCUMULATION;
D O I:
10.1016/j.envres.2019.109045
中图分类号:
X [环境科学、安全科学];
学科分类号:
08 ;
0830 ;
摘要:
Anaerobic digestion of waste activated sludge (WAS) to produce acetate has recently attracted growing interest, while the slow hydrolytic acidification of sludge and the consumption of acetate by methanogens both decrease the yield of acetate. In this study, Fe3O4 was added to a WAS anaerobic digester under alkaline conditions (pH = 10). The concentration of short-chain fatty acids (SCFA) during WAS anaerobic fermentation was found to be affected positively by Fe3O4. The maximal SCFA production of the Fe3O4-added digester was 3619.4 mg/L, while the maximal SCFA production in the control was 2899.7 mg/L. The increase of SCFA with Fe3O4 was mainly resulted from the increase in acetate accumulation (accounting for 90%), because Fe3O4 stimulated dissimilatory iron reduction (DIR) that participated in the decomposition of complex organics and the transformation of pronionate and butyrate into acetate. Further investigation showed that each step of hydrolytic-acidification process was promoted except the homoacetogenesis. The activity of enzymes and abundance of microbes relevant to hydrolysis and acidification were in agreement with the above results.
机构:
Tongji Univ, Coll Environm Sci & Engn, Int Joint Res Ctr Sustainable Urban Water Syst, State Key Lab Pollut Control & Resource Reuse, 1239 Siping Rd, Shanghai 200092, Peoples R China
UN Environm Tongji Inst Environm Sustainable Dev, Siping Rd, Shanghai 200092, Peoples R ChinaTongji Univ, Coll Environm Sci & Engn, Int Joint Res Ctr Sustainable Urban Water Syst, State Key Lab Pollut Control & Resource Reuse, 1239 Siping Rd, Shanghai 200092, Peoples R China
Hu, Jiawei
Guo, Bing
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机构:
Tongji Univ, Coll Environm Sci & Engn, Int Joint Res Ctr Sustainable Urban Water Syst, State Key Lab Pollut Control & Resource Reuse, 1239 Siping Rd, Shanghai 200092, Peoples R ChinaTongji Univ, Coll Environm Sci & Engn, Int Joint Res Ctr Sustainable Urban Water Syst, State Key Lab Pollut Control & Resource Reuse, 1239 Siping Rd, Shanghai 200092, Peoples R China
Guo, Bing
Li, Zhuo
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机构:
Tongji Univ, Coll Environm Sci & Engn, Int Joint Res Ctr Sustainable Urban Water Syst, State Key Lab Pollut Control & Resource Reuse, 1239 Siping Rd, Shanghai 200092, Peoples R ChinaTongji Univ, Coll Environm Sci & Engn, Int Joint Res Ctr Sustainable Urban Water Syst, State Key Lab Pollut Control & Resource Reuse, 1239 Siping Rd, Shanghai 200092, Peoples R China
Li, Zhuo
Wu, Zhigen
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机构:
Tongji Univ, Coll Environm Sci & Engn, Int Joint Res Ctr Sustainable Urban Water Syst, State Key Lab Pollut Control & Resource Reuse, 1239 Siping Rd, Shanghai 200092, Peoples R ChinaTongji Univ, Coll Environm Sci & Engn, Int Joint Res Ctr Sustainable Urban Water Syst, State Key Lab Pollut Control & Resource Reuse, 1239 Siping Rd, Shanghai 200092, Peoples R China
Wu, Zhigen
Tao, Wenquan
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机构:
Tongji Univ, Coll Environm Sci & Engn, Int Joint Res Ctr Sustainable Urban Water Syst, State Key Lab Pollut Control & Resource Reuse, 1239 Siping Rd, Shanghai 200092, Peoples R ChinaTongji Univ, Coll Environm Sci & Engn, Int Joint Res Ctr Sustainable Urban Water Syst, State Key Lab Pollut Control & Resource Reuse, 1239 Siping Rd, Shanghai 200092, Peoples R China
机构:
CenerTech Tianjin Chem Res & Design Inst Co Ltd, Natl Res Ctr Ind Water Treatment Engn & Technol, 85 Dingzigu 3rd Rd, Tianjin 300131, Peoples R ChinaCenerTech Tianjin Chem Res & Design Inst Co Ltd, Natl Res Ctr Ind Water Treatment Engn & Technol, 85 Dingzigu 3rd Rd, Tianjin 300131, Peoples R China
Wang, Haolong
Liu, Xiaoguang
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Tongji Univ, Coll Environm Sci & Engn, State Key Lab Pollut Control & Resource Reuse, 1239 Siping Rd, Shanghai 200092, Peoples R ChinaCenerTech Tianjin Chem Res & Design Inst Co Ltd, Natl Res Ctr Ind Water Treatment Engn & Technol, 85 Dingzigu 3rd Rd, Tianjin 300131, Peoples R China
Liu, Xiaoguang
Sun, Yanmin
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h-index: 0
机构:
CenerTech Tianjin Chem Res & Design Inst Co Ltd, Natl Res Ctr Ind Water Treatment Engn & Technol, 85 Dingzigu 3rd Rd, Tianjin 300131, Peoples R ChinaCenerTech Tianjin Chem Res & Design Inst Co Ltd, Natl Res Ctr Ind Water Treatment Engn & Technol, 85 Dingzigu 3rd Rd, Tianjin 300131, Peoples R China
Sun, Yanmin
Nan, Jun
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机构:
CenerTech Tianjin Chem Res & Design Inst Co Ltd, Natl Res Ctr Ind Water Treatment Engn & Technol, 85 Dingzigu 3rd Rd, Tianjin 300131, Peoples R ChinaCenerTech Tianjin Chem Res & Design Inst Co Ltd, Natl Res Ctr Ind Water Treatment Engn & Technol, 85 Dingzigu 3rd Rd, Tianjin 300131, Peoples R China
Nan, Jun
Wang, Zicheng
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机构:
CenerTech Tianjin Chem Res & Design Inst Co Ltd, Natl Res Ctr Ind Water Treatment Engn & Technol, 85 Dingzigu 3rd Rd, Tianjin 300131, Peoples R ChinaCenerTech Tianjin Chem Res & Design Inst Co Ltd, Natl Res Ctr Ind Water Treatment Engn & Technol, 85 Dingzigu 3rd Rd, Tianjin 300131, Peoples R China
Wang, Zicheng
Zhou, Lishan
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h-index: 0
机构:
CenerTech Tianjin Chem Res & Design Inst Co Ltd, Natl Res Ctr Ind Water Treatment Engn & Technol, 85 Dingzigu 3rd Rd, Tianjin 300131, Peoples R ChinaCenerTech Tianjin Chem Res & Design Inst Co Ltd, Natl Res Ctr Ind Water Treatment Engn & Technol, 85 Dingzigu 3rd Rd, Tianjin 300131, Peoples R China
Zhou, Lishan
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING,
2025,
13
(02):