INHIBITION AND ASSESSMENT OF TOXICITY ON ANAEROBIC DEGRADATION OF ANTI-OSMOTIC DRUG BASED PHARMACEUTICAL EFFLUENT IN AN UP-FLOW ANAEROBIC FLUIDIZED BED SYSTEM

摘要

Pharmaceutical industries, mainly antibiotic and synthetic drug based industries suffer from inadequate treatment due to the presence of toxic substances and complex biomass formed during the secondary treatment process. Aromatic compounds such as phenols and methylated phenyls are commonly encountered pollutants, originating typically from modern industrial activities. Because of their bacterial toxicity and recalcitrance, when present in wastewaters, they play a key role in decreasing COD removal rates in treatment systems. As a result of their toxicity and despite their usually relatively low concentration, their removal from contaminated effluents is as important as removal of the COD fraction. Anaerobic degradation of different constituents of antibiotic and synthetic drug based effluents has recently been proved, under methanogenic [1-4], sulphate reducing [2,5-7], nitrate reducing [8,9] and iron reducing [10] conditions. In this paper, the effect of toxicity and anaerobic degradation of cephradine with volatile fatty acid (VFA) as co -substrate were checked in batch systems with adapted and non-adapted cultures. The effect of bioaugmentation on COD removal efficiency was also determined in batch as well as continuous mode using pharmaceutical effluent.