![Sample our Food Science & Technology journals, sign in here to start your access, latest two full volumes FREE to you for 14 days]({"type":"image" , "src" : "/sda/5936/TOC-Subject-Sample-2021-Food-Science-Technology.jpg"})
ABSTRACT
Pentachlorophenol (PCP) biodegradation was studied comparatively in anaerobic and aerobic conditions. Two laboratory scale systems of completely mixed continuos flow bioreactor and secondary clarifier were used. Simultaneous treatment of municipal and industrial wastewater with high concentration of PCP (25 mg/l) was investigated. The results show that the biodegradation of trivial organic and PCP in aerobic conditions was better than in anaerobic conditions: the removal efficiencies were 83,3%(COD) and 55%(PCP) in the aerobic system against 41,3% (COD) and 47%(PCP) in the anaerobic system. The mean values of the effluent concentrations were 337 mg/l (COD) and 11 mg/l (PCP) for the aerobic experiment against 1263 mg/l (COD) and 12,8 mg/l (PCP) for the anaerobic experiment. Although the removal efficiencies of PCP and COD were relatively good for the investigated extremely high influent PCP concentration, both schemes did not meet the standards for the effluent concentration. Therefore the investigated bioreactors could be used only as a first stage in a system of bioreactors for completely PCP removal.