title: The microbial ecology of the activated sludge process.
mesh_terms: D001419:Bacteria / Q000302:isolation & purification; D016798:Ciliophora / Q000302:isolation & purification; D004463:Ecology; D004770:Enterovirus / Q000302:isolation & purification; D004926:Escherichia coli / Q000302:isolation & purification; D056890:Eukaryota / Q000302:isolation & purification; D005427:Flocculation; D005658:Fungi / Q000302:isolation & purification; D006088:Gram-Negative Aerobic Bacteria / Q000378:metabolism; D008433:Mathematics; D008954:Models, Biological; D009576:Nitrobacter / Q000302:isolation & purification; D009606:Nitrosomonas / Q000302:isolation & purification; D012722:Sewage; D014871:Water Microbiology
chemical_list: D012722:Sewage