Windrow composting mitigated CH4 emissions: characterization of methanogenic and methanotrophic communities in manure management. Issue 3 (26th September 2014)

• Record Type: Journal Article
• Authors: Chen, Ruirui; Wang, Yiming; Wei, Shiping; Wang, Wei; Lin, Xiangui
• Is Part Of: FEMS microbiology ecology. Volume 90:Issue 3(2014)
• Page Start: 575
• Page End: 586
• Publication Date: 2014-09-26
• Subjects: Microbial ecology -- Periodicals; Microbiology -- Periodicals; 579.17
• DOI: 10.1111/1574-6941.12417
• Languages: English
• ISSNs: 0168-6496

Abstract

<abstract abstract-type="main" id="fem12417-abs-0001"> <title>Abstract</title> <p>With increasing livestock breeding, methane (CH<sub>4</sub>) emissions from manure management will increasingly contribute more to atmospheric CH<sub>4</sub> concentration. The dynamics of methanogens and methanotrophs have not yet been studied in the manure environment. The current study combines surface CH<sub>4</sub> emissions with methanogenic and methanotrophic community analyses from two management practices, windrow composting (WCOM) and solid storage (SSTO). Our results showed that there was an <italic>c</italic>. 50% reduction of CH<sub>4</sub> emissions with WCOM compared with SSTO over a 50‐day period. A sharp decrease in the quantities of both methanogens and methanotrophs in WCOM suggested that CH<sub>4</sub> mitigation was mainly due to decreased CH<sub>4</sub> production rather than increased CH<sub>4</sub> oxidation. Pyrosequencing analysis demonstrated that aeration caused a clear shift of dominant methanogens in the manure, with specifically a significant decrease in <italic>Methanosarcina</italic> and increase in <italic>Methanobrevibacter</italic>. The composition of methanogenic community was influenced by manure management and regulated CH<sub>4</sub> production. A sharp increase in the quantity of methanotrophs in SSTO suggested that microbial CH<sub>4</sub> oxidation is an important sink for the CH<sub>4</sub> produced. The increased abundance of <italic>Methylococcaceae</italic> in SSTO suggested that Type I methanotrophs have an advantage in CH<sub>4</sub> oxidation in occupying niches under low CH<sub>4</sub> and high O<sub>2</sub> conditions.</p> </abstract>