Anaerobic co-digestion of raw glycerol and swine manure: microbial communities
In the present study, we evaluated the biogas production from the anaerobic co-digestion of raw glycerol (RG) in combination with swine manure (SM) and the interaction of the microbial community during anaerobic co-digestion. In the same way, different RG and SM concentrations were examined in the r...
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Published in | Biomass conversion and biorefinery Vol. 13; no. 8; pp. 7127 - 7138 |
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Main Authors | , , , , , , |
Format | Journal Article |
Language | English |
Published |
Berlin/Heidelberg
Springer Berlin Heidelberg
01.06.2023
Springer Nature B.V |
Subjects | |
Online Access | Get full text |
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Summary: | In the present study, we evaluated the biogas production from the anaerobic co-digestion of raw glycerol (RG) in combination with swine manure (SM) and the interaction of the microbial community during anaerobic co-digestion. In the same way, different RG and SM concentrations were examined in the range of 6 to 15 g L
−1
and 7.5 to 22.5 g L
−1
, respectively. According to the results, the highest values for biogas yield and methane yield were observed in test 1(6 g RG/7.5 g SM) with 340 mL g
−1
COD, test 2 (6 g RG/22.5 g SM) with 330 mL g
−1
COD, test 4 (15 g RG/22.5 g SM) with 344 mL g
−1
COD, and test 5 (3.75 g RG/15 g SM) with 328 mL g
−1
COD. Although the concentration of substrates increases, glycerol remains between 20 and 21% of RG for both tests (2 and 5). An increase in the concentration of RG (> 21% w/w) generated inhibitory effects for the co-digestion process since there was an overload of organic acids, which increase the impurity concentration and lower the biogas yield. Thus, the microbial consortium is a function of the organic load of the RG/SM ratio. The greater the concentration of RG, the higher the population of clostridium and low biogas yield in anaerobic co-digestion. |
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ISSN: | 2190-6815 2190-6823 |
DOI: | 10.1007/s13399-021-01914-y |