Removal of antibiotics (amoxicillin and tetracycline) from hospital wastewater using hybrid Chemical purification (PS/Fe <SUP>+۲</SUP>/UV) and Batch biological reactor (RBS).

Background: The purpose of this study is to investigate the performance of tetracycline and amoxicillin antibiotics removal from hospital wastewater using a combination of chemical treatment and Batch biological reactor.Metods: In this study, the effect of PS/Fe۲+/UV to remove tetracycline and amoxicillin was investigated. Different parameters including pH, different concentrations of iron, antibiotics and prosulfate were investigated for removal efficiency. The remaining concentration of the solution was measured using an HPLC device. The degree of mineralization of the process was evaluated using the COD parameter Then, the removal of tetracycline, amoxicillin and COD from the pre-treated wastewater in the batch biological reactor (RBS) was investigated.Results: The results showed that the PS/Fe۲+/UV process alone was able to remove ۱۰۰% of tetracycline and ۹۷.۳% of amoxicillin from laboratory conditions and ۶۹% of tetracycline and ۶۷.۲% of amoxicillin from wastewater in a reaction time of ۶۰ minutes. Also, the amount of mineralization of tetracycline and amoxicillin antibiotics by PS/Fe۲+/UV process was evaluated using COD index, which resulted in removal of more than ۶۰% of COD for both antibiotics. The combination of this process and the batch biological reactor (RBS) also succeeded in removing ۹۹% of BOD۵ from both antibiotics and ۹۸% of COD from real wastewater containing ۱۰ mg of tetracycline and amoxicillin.Conclusion: Combined PS/Fe۲+/UV process and batch biological reactor is an efficient method. And it is effective in removing antibiotics and its mineralization for wastewater treatment containing tetracycline and amoxicillin antibiotics.

Keywords:

Antibiotic , advanced purification , discontinuous biological reactor , tetracycline and amoxicillin