Title: Investigation of microbial communities in the field-scale co-composting of sewage sludge and organic municipal solid wastes

Authors: Şenol Yıldız; Emre Oğuz Köroğlu; Ahmet Demir; Bestami Özkaya; Osman Atilla Arikan

Addresses: ISTAÇ, Istanbul Metropolitan Municipality, International Natural Gas Training, Test and Certification Center (UGETAM), Pendik, Istanbul, Turkey ' Department of Environmental Engineering, Yildiz Technical University, Istanbul, Turkey ' Department of Environmental Engineering, Yildiz Technical University, Istanbul, Turkey ' Department of Environmental Engineering, Yildiz Technical University, Istanbul, Turkey ' Department of Environmental Engineering, Istanbul Technical University, Istanbul, Turkey

Abstract: The alternative methods should be used to treat sewage sludge and municipal solid wastes which are mostly landfilled in Turkey. Therefore co-composting of these waste streams is a suitable disposal method yielding a useful product. The aim of this study was to investigate the microbial community during the field scale co-composting of sewage sludge and organic municipal solid wastes with addition of bulking agents. Aerated static pile of approximately 26 m³ was used for composting process during 56 days. Investigations of diversity dynamics depending on the temperature were determined by denaturing gradient gel electrophoresis and sequencing of bacterial 16SrDNA-PCR products. The variations of physicochemical parameters and biodegradability during the process were also monitored. The results showed that most of microbial group's role in composting process was temperature dependent and composting was designated by its characteristic thermal profile.

Keywords: aerated static pile; composting; microbial community; organic municipal solid wastes; sewage sludge.

DOI: 10.1504/IJGW.2019.101780

International Journal of Global Warming, 2019 Vol.19 No.1/2, pp.177 - 192

Received: 03 Oct 2018
Accepted: 20 Apr 2019
Published online: 26 Aug 2019 *

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