Chemical characterization of municipal wastewater sludges produced by two-phase anaerobic digestion for biogas production

被引：111

作者：

Francioso, Ornella ^{[1
]}

Rodriguez-Estrada, Maria Teresa ^{[2
]}

Montecchio, Daniela ^{[1
]}

Salomoni, Cesare ^{[3
]}

Caputo, Armando ^{[3
]}

Palenzona, Domenico ^{[4
]}

机构：

[1] Dipartimento Sci & Tecnol Agroambientali, I-40127 Bologna, Italy

[2] Dipartimento Sci Alimenti, I-40127 Bologna, Italy

[3] Biotec Sys Srl, I-40139 Bologna, Italy

[4] Dipartimento Biol Evoluzionist Sperimentale, I-40126 Bologna, Italy

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2010年 / 175卷 / 1-3期

关键词：

Anaerobic digestion; Municipal wastewater sludges; delta C-13; DRIFT; HS-SPME-GC-MS; TG-DTA; CARBON-ISOTOPE FRACTIONATION; SOLID-PHASE MICROEXTRACTION; FATTY-ACIDS; THERMAL-ANALYSIS; ORGANIC-MATTER; TG-DTA; THERMOGRAVIMETRY; SPECTROSCOPY; DEGRADATION; OXIDATION;

D O I：

10.1016/j.jhazmat.2009.10.071

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

In the present study, the chemical features of municipal wastewater sludges treated in two-phase separate digesters (one for acetogenesis and the other one for methanogenesis), were characterized by using chemical analysis, stable carbon isotope ratios (delta C-13), HS-SPME-GC-MS, TG-DTA analysis and DRIFT spectroscopy. The results obtained showed that Sludges from acetogenesis and methanogenesis differed from each other, as well as from influent raw sludges. Both processes exhibited a diverse chemical pattern in term of VFA and VOC. Additional variations were observed for delta C-13 values that changed from acetogenesis to methanogenesis, as a consequence of fermentation processes that led to a greater fractionation of C-12 with respect to the C-13 isotope. Similarly, the thermal profiles of acetogenesis and methanogenesis sludges greatly differed in terms of heat combustion produced. These changes were also supported by higher lipid content (probably fatty acids) in acetogenesis than in methanogenesis, as also shown by DRIFT spectroscopy. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：740 / 746

页数：7

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