Erratum to: Evaluation of heavy metal content in digestate from batch anaerobic co-digestion of sunflower hulls and poultry manure

Erratum to: J Mater Cycles Waste Manag (2013) 15:242–246 DOI: 10.1007/s10163-012-0107-4

Lines 1–14 of “The presence of heavy metals in the digestate” in “Results and discussion” and Table 3 should read as follow:

The final concentrations of heavy metals in the biogas digestate are given in Table 3 and the results are compared with the limit values stated in Turkish regulations [17]. The concentrations of Ni, Zn, Cu, Pb, Cr, Cd, and Hg in the digestate varied between 0.51–2.01, 0.81–43.00, 0.12–0.55, 0.02–0.24, 0.10–1.66, 0.05–0.06, and 0.16–1.34 mg/kg, respectively. These concentrations were all below the limit values stated in the regulation.

Table 3 The concentrations of heavy metals in the biogas digestate after batch experiments