Potential availability of metals in anaerobic mono- and co-digestion of pig manure and maize

[Display omitted] •The metal speciation in digestates was influenced by those of the feedstocks.•The HMs bioavailability stabled around 24–37 days of mono- and co-digestion.•Zn, Mn, and Cd were predominantly bioavailable in mono and co-digestion.•Cr, Cu, Fe, and Pb were mainly linked with the oxidis...

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