Schematic diagram of Hollow Fiber Membrane Biofilm Reactor (Hf-MBfR) system [11].

<p>Schematic diagram of Hollow Fiber Membrane Biofilm Reactor (Hf-MBfR) system [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0144999#pone.0144999.ref011" target="_blank">11</a>].</p>