Biodegradation, Bioreactors - microbiology, Sewage - microbiology, Hydrogen-Ion Concentration - drug effects, Environmental - drug effects, Aerobiosis - drug effects, Disinfectants - pharmacology, Microbial Viability - drug effects, Nitrates - analysis, Nitrites - analysis, Nitrous Acid - pharmacology, Oxidation-Reduction - drug effects, Oxygen - analysis, Q...