1. Dipartimento di Ingegneria Civile e Ambientale─Sezione Ambientale, Politecnico di Milano, Milan 20133, Italy
2. Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
3. Laboratoire Ecologie et Biologie des Interactions (EBI), Equipe Microorganismes, Hôtes, Environnements, Université de Poitiers, Poitiers 86073, France
4. KWR Watercycle Research Institute, 3433 PE Nieuwegein, The Netherlands
5. Department of Microbiology, Radboud University, Heyendaalseweg 135, 6525 AJ Nijmegen, The Netherlands
6. Laboratory of Microbiology, Wageningen University, 6700 HB Wageningen, The Netherlands
7. School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States