The invention belongs to the field of microorganisms, and particularly relates to a salt-tolerant Methanobacterium sp.strain YSL and application thereof. The Methanobacterium sp.strain YSL is preserved in China General Microbiological Culture Collection Center (CGMCC), with the preservation number being CGMCC NO.18876. Currently, the bacterial strain is the first reported methanogenic archaea which can utilize formic acid but not hydrogen, and can improve the methanogenic efficiency in a biogas digester, with a wide application prospect in the aspect of biological energy.
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