Micronutrient dynamics after thermal pretreatment of olive mill solid waste

© 2015 Elsevier Ltd. This study investigated metal dynamics, and their bioavailability, before and after thermal pretreatment of olive mill solid waste (OMSW), using a sequential metal extraction scheme. The 11.5% increase of cobalt in the most available fraction after the pretreatment coupled to the increase of methane production rate have been a good indicator that the OMSW anaerobic digestion might be metal limited due to the lack of cobalt.The authors wish to express their gratitude to the Spanish “Ministerio de Economia y Competitividad” (project CTM2014-55095-R) for providing financial support. The authors acknowledge funding within the framework of the COST Action 1302 (‘European Network on Ecological Roles of Trace Metals in Anaerobic Biotechnologies’)Peer Reviewe