1. Laboratory of Microbiology, Wageningen University & Research, Stippeneng 4, 6708 WE Wageningen, The Netherlands
2. Flemish Institute
for Technological Research (VITO), Separation and Conversion Technology, Boeretang 200, 2400 Mol, Belgium
3. KU Leuven, Division of Soil and Water Management, Kasteelpark Arenberg 20, B-3001 Heverlee, Belgium