Anaerobic co-digestion of pig manure and crude glycerol at mesophilic conditions: Biogas and digestate

被引：191

作者：

Astals, S. ^{[1
]}

Nolla-Ardevol, V. ^{[1
,2
]}

Mata-Alvarez, J. ^{[1
]}

机构：

[1] Univ Barcelona, Dept Chem Engn, E-08028 Barcelona, Spain

[2] Univ Bielefeld, Ctr Biotechnol, Inst Genome Res & Syst Biol, D-33615 Bielefeld, Germany

来源：

BIORESOURCE TECHNOLOGY | 2012年 / 110卷

关键词：

Anaerobic digestion; Codigestion; Swine manure; Glycerine; SOLID-WASTES; INHIBITION; STABILITY; AMMONIA; REACTOR; CODIGESTION;

D O I：

10.1016/j.biortech.2012.01.080

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

Crude glycerol derived from biodiesel production is characterized by its high concentration of organic carbon and its solubility in water; properties that make it a suitable co-substrate to improve the efficiency of a manure digester. An increase of about 400% in biogas production was obtained under mesophilic conditions when pig manure was co-digested with 4% of glycerol, on a wet-basis, compared to mono-digestion. The increase in biogas production was mainly a consequence of the increase in organic loading rate. However, the differences could also be related to the synergy between both substrates and the carbon-to-nitrogen ratio. Moreover, the analysis of the macro-compounds, protein, lipids, carbohydrates and fibers, showed lower removal efficiencies in the co-digester as the microorganisms obtained nutrients from the soluble carbohydrates provided by the glycerol. The digestate stability, evaluated through a respirometric assay, showed that co-substrate addition does not exert a negative impact on digestate quality. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：63 / 70

页数：8

共 38 条

[1] A comparative study of the advanced oxidation of 2,4-dichlorophenol [J].