The effect of applying ozonation and perozonation to antibiotic cefazolin-Na formulation effluents were investigated in this study. Twenty minutes of ozonation at a rate of 1,500 mg/L-h was observed to remove COD by 38%, whereas a COD removal efficiency of 40% was achieved via H2O2 enhanced ozonation (same conditions + 31.25 mM H2O2). Both of the pretreatment alternatives were monitored to elevate the BOD5/COD ratio from 0.01 to 0.08. The initially inert COD was reduced by 38% using ozonation and by 60% employing H2O2 enhanced ozonation. In terms of the lowest achievable effluent COD levels after bio-treatment, ozonation was observed to yield a residual COD of 205 mg L−1, while a residual COD of 135 mg L−1 was involved for perozonation. According to the results of acute toxicity on Phaedactylum tricornutum, ozonated and perozonated samples exhibited more toxicity than the untreated effluent after 4 days. The activated sludge inhibition test demonstrated that both of the pretreatment alternatives efficiently eliminated the inhibition of investigated formulation effluent.
Treatability of cefazolin antibiotic formulation effluent with O3 and O3/H2O2 processes
G. Iskender, A. Sezer, I. Arslan-Alaton, F. Germirli Babuna, O.S. Okay; Treatability of cefazolin antibiotic formulation effluent with O3 and O3/H2O2 processes. Water Sci Technol 1 May 2007; 55 (10): 217–225. doi: https://doi.org/10.2166/wst.2007.325
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