Biodegradation of Estrogens and Veterinary Antibiotics during Aerobic and Anaerobic Processes for Livestock Wastewater Treatment

  • 蘇 哲立

Student thesis: Master's Thesis


Water scarcity causes serious problems Thus developing more water resources for reuse becomes an important issue Livestock wastewater accounting for 27% of overall wastewater in Taiwan and containing high concentration of nitrogen and phosphate nutrients is a potential source of fertilizer for agriculture Nevertheless conventional wastewater treatment plants could not remove estrogens and antibiotics contented in livestock wastewater efficiently Estrogens discharged into environment will disrupt normal endocrine system function of animals while antibiotics discharged into environment will increase antibiotics resistances in microorganisms Two livestock wastewater treatment plants (LWTPs) were investigated the occurrence of estrogens and antibiotics regularly Lab-scale sequencing batch reactors were built to simulate the treatment processes part of them were spiked with estrogens or antibiotics and others were used as control group without additional estrogens and antibiotics Then batch tests were conducted to clarify removal mechanisms of estrogens and antibiotics in biological treatment process In the study the sorption behavior and biodegradation of estrone (E1) 17β-estradiol (E2) and estriol (E3) were investigated The biotic and abiotic behaviors of tetracycline (TC) oxytetracycline (OTC) chlortetracycline (CTC) sulfadiazine (SDZ) sulfathiazole (STZ) sulfamerazine (SMR) sulfamethoxazole (SMX) lincomycin (LCM) tylosin (TYL) and erythromycin (ERY) were summarized and discussed Besides the unfished part of anaerobic biodegradability of tetracycline (TC) oxytetracycline (OTC) chlortetracycline (CTC) sulfadiazine (SDZ) sulfathiazole (STZ) and sulfamerazine (SMR) in previous studies were also clarified The results of batch tests showed that tetracyclines were largely affected by wastewater and sludge while E1 and E2 were significantly affected by sludge LCM TYL ERY and STZ were slightly affected and the interaction of E3 SDZ SMR and SMX with wastewater matrix could be neglected Moreover estrogens sulfonamides LCM TYL and ERY had aerobic biodegradation potential while E2 TYL ERY and SMX had anaerobic biodegradation potential There were no biodegradation potential for tetracyclines and no anaerobic biodegradation potential for E1 E3 LCM SDZ STZ and SMR Overall this study could help to clarify the fate and behavior of three estrogens and ten antibiotics in the aerobic and anaerobic biological treatment process
Date of Award2017 Aug 24
Original languageEnglish
SupervisorWan-Ru Chen (Supervisor)

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