Molecular characteristics of the refractory organic matter in the anaerobic and aerobic digestates of sewage sludge

被引:13
|
作者
Li, Xiaowei [1 ]
Mei, Qingqing [1 ]
Yan, Xiaofang [1 ]
Dong, Bin [2 ,3 ]
Dai, Xiaohu [2 ,4 ]
Yu, Liangliang [5 ]
Wang, Yibo [6 ]
Ding, Guoji [1 ]
Yu, Fang [1 ]
Zhou, John [7 ]
机构
[1] Shanghai Univ, Inst Conservat Cultural Heritage, Sch Environm & Chem Engn, Shanghai 200444, Peoples R China
[2] Tongji Univ, State Key Lab Pollut Control & Resources Reuse, Natl Engn Res Ctr Urban Pollut Control, Coll Environm Sci & Engn, Shanghai 200092, Peoples R China
[3] Zhejiang Univ, Ningbo Inst Technol, Sch Civil Engn & Architecture, Ningbo 315000, Zhejiang, Peoples R China
[4] Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200092, Peoples R China
[5] Yanjin Senior High Sch, Shanghai 200122, Peoples R China
[6] Shanghai Univ, Sch Life Sci, Shanghai Key Lab Bioenergy Crops, Shanghai 200444, Peoples R China
[7] Univ Technol Sydney, Sch Civil & Environm Engn, 15 Broadway, Sydney, NSW 2007, Australia
来源
RSC ADVANCES | 2018年 / 8卷 / 58期
关键词
PHASE FLUORESCENCE SPECTROSCOPY; ACID-LIKE FRACTIONS; HUMIC-ACID; ANALYTICAL PYROLYSIS; ACTIVATED-SLUDGE; CO-DIGESTION; WASTES; GC/MS; STABILIZATION; BIOFERTILIZER;
D O I
10.1039/c8ra05009k
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The chemical characteristics of the refractory organic matter in anaerobic and aerobic digestates are hardly known although they are significant for further improving the degradation of organic matter during sludge digestion. Thus, in this study, various techniques are used to analyze the molecular properties of the total organic matter in raw sludge and mesophilic anaerobic and aerobic digestates (AnD and AoD, respectively). The results show that AnD has lower organic matter content, but the maturity and aromatization of its organic matter are lower than those of AoD. The FTIR and XPS spectra show that AoD has higher proportions of protein-like and aromatic groups and lower percentages of polysaccharide-like materials and ammonia nitrogen compared with AnD. The solid-phase fluorescence spectra indicate that AoD has a higher content of fluorescence organic matter, but its biodegradability and chemical accessibility are lower than those of AnD. Pyrolysis GC/MS analysis shows that the digestates are enriched with more lignin-like and aromatic groups and contain lower oxycompounds compared with raw sludge, especially AoD. These findings provide new insights into the molecular characteristics of the refractory organic matter in anaerobic and aerobic digestates and also provide a possible strategy to further enhance the degradation of organic matter in sewage sludge.
引用
收藏
页码:33138 / 33148
页数:11
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