| Title |
Effect of humic acid on anaerobic digestion of cellulose and xylan in completely stirred tank reactors: inhibitory effect, mitigation of the inhibition and the dynamics of the microbial communities.
|
|---|---|
| Published in |
Applied Microbiology and Biotechnology, November 2016
|
| DOI | 10.1007/s00253-016-8010-x |
| Pubmed ID | |
| Authors |
Samet Azman, Ahmad F. Khadem, Caroline M. Plugge, Alfons J. M. Stams, Sabina Bec, Grietje Zeeman |
| Abstract |
Inhibition effect of humic acid (HA) on anaerobic digestion of cellulose and xylan and the mitigation potential of the inhibition were evaluated in controlled fed batch reactors at 30 °C and a hydraulic retention time (HRT) of 20 days. Reactor performances were evaluated by biogas production and metabolite measurements for 220 days. Microbial population dynamics of the reactors were monitored with next-generation 16S rRNA gene sequencing at nine different sampling times. Our results showed that increasing levels of HA inhibited the hydrolysis efficiency of the digestion by 40% and concomitantly reduced the methane yield. Addition of hydrolytic enzymes helped to reverse the negative effects of HA, whereas calcium addition did not reverse HA inhibition. Microbiological analyses showed that the relative abundance of hydrolytic/fermentative bacterial groups such as Clostridiales, Bacteroidales and Anaerolineales was significantly lowered by the presence of HA. HA also affected the archaeal populations. Mostly hydrogenotrophic methanogens were negatively affected by HA. The relative abundance of Methanobacteriaceae, Methanomicrobiales-WCHA208 and Unassigned Thermoplasmata WCHA1-57 were negatively affected by the presence of HA, whereas Methanosaetacea was not affected. |
Mendeley readers
The data shown below were compiled from readership statistics for 117 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Unknown | 117 | 100% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Master | 24 | 21% |
| Student > Ph. D. Student | 15 | 13% |
| Student > Bachelor | 14 | 12% |
| Researcher | 12 | 10% |
| Student > Doctoral Student | 5 | 4% |
| Other | 17 | 15% |
| Unknown | 30 | 26% |
| Readers by discipline | Count | As % |
|---|---|---|
| Environmental Science | 24 | 21% |
| Engineering | 17 | 15% |
| Agricultural and Biological Sciences | 15 | 13% |
| Chemical Engineering | 7 | 6% |
| Biochemistry, Genetics and Molecular Biology | 7 | 6% |
| Other | 5 | 4% |
| Unknown | 42 | 36% |
Attention Score in Context
This research output has an Altmetric Attention Score of 1. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 13 October 2017.
All research outputs
#16,371,088
of 24,119,703 outputs
Outputs from Applied Microbiology and Biotechnology
#5,817
of 8,034 outputs
Outputs of similar age
#259,020
of 424,262 outputs
Outputs of similar age from Applied Microbiology and Biotechnology
#54
of 88 outputs
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