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Changes in the microbial communities during co-composting of digestates
Citation Link: https://doi.org/10.15480/882.2299
Publikationstyp
Journal Article
Date Issued
2014-01-21
Sprache
English
TORE-DOI
TORE-URI
Journal
Volume
34.2014
Start Page
632
End Page
641
Citation
Waste Management 3 (34): 632-641 (2014-03-01)
Publisher DOI
Scopus ID
Publisher
Elsevier
Anaerobic digestion is a waste treatment method which is of increasing interest worldwide. At the end of the process, a digestate remains, which can gain added value by being composted. A study was conducted in order to investigate microbial community dynamics during the composting process of a mixture of anaerobic digestate (derived from the anaerobic digestion of municipal food waste), green wastes and a screened compost (green waste/kitchen waste compost), using the COMPOCHIP microarray. The composting process showed a typical temperature development, and the highest degradation rates occurred during the first 14days of composting, as seen from the elevated CO2 content in the exhaust air. With an exception of elevated nitrite and nitrate levels in the day 34 samples, physical-chemical parameters for all compost samples collected during the 63day process indicated typical composting conditions. The microbial communities changed over the 63days of composting. According to principal component analysis of the COMPOCHIP microarray results, compost samples from the start of the experiment were found to cluster most closely with the digestate and screened compost samples. The green waste samples were found to group separately. All starting materials investigated were found to yield fewer and lower signals when compared to the samples collected during the composting experiment. © 2014 The Authors.
Subjects
composting
Anaerobic digestion
COMPOCHIP
Microarray
Nitrogen compounds
DDC Class
620: Ingenieurwissenschaften
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