Szukana fraza: [Abstract = "Trace elements \(Co, Ni, Cu, Mn, Fe, Zn, Se and Mo\) are components of enzymes, some bacterial nucleic acids and essential for the synthesis of vitamins. The role of some trace elements, eg. Fe or Mo, has been well understood, while the importance of others still needs to be clarified. Literature data indicate that supplementing trace elements not only prevents process inhibition, but can also improve its performance by providing higher methane production."]

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