Erratum to: Environ Sci Pollut Res

DOI 10.1007/s11356-014-3130-2

The original publication of this article contains a mistake. The correct title is: “Sequential anaerobic/aerobic digestion for enhanced sludge stabilization: comparison of the process performance for mixed and waste sludge”, which replaces the previous one : “Sequential anaerobic/anaerobic digestion for enhanced sludge stabilization: comparison of the process perfor-mance for mixed and waste sludge”.