Fig. 6From: Microbial network for waste activated sludge cascade utilization in an integrated system of microbial electrolysis and anaerobic fermentationCommunity change and linkage during sludge cascade utilization (from fermentation to MEC) after different sludge treatments. Bacterial communities based on OUT (3 % distance), and the taxonomic identification of OTUs at phylum level, during sludge cascade utilization of alkaline treated SFL; anode biofilm communities (MEC) changed into a new biofilm community (M-a) after feeding SFL (communities of F-control)Back to article page