Sorption and biodegradation of veterinary antibiotics in livestock wastewater treatment process

  • 王 荏鴻

Student thesis: Master's Thesis

Abstract

The occurrence and fate of antibiotics in environment including surface water groundwater and soils has drawn great attention of researchers all over the world in recent years The persistence of antibiotics in the aquatic environment exerts a selective pressure on autochthonous bacterial communities which eventually poses risks to the ecosystem and human health The occurrences and the removal efficiencies of four groups of antibiotics in two livestock wastewater treatment plants including tetracyclines sulfonamides lincosamides and macrolides were analyzed regularly for long-term monitoring Two lab-scale aerobic SBR were built to simulate aerobic treatment condition One was regularly fed with four sulfonamides and the other was used as control group without providing additional antibiotics In addition batch tests were used to clarify how the antibiotics interact with the matrix in the wastewater In this study the adsorption behavior and biodegradation of sulfadiazine (SDZ) sulfathiazole (STZ) sulfamerazine (SMR) and sulfamethoxazole (SMX) on activated sludge were investigated Tetracycline (TC) oxytetracycline (OTC) and chlortetracycline (CTC) were chosen to compare adsorption characteristic with sulfonamides The results of batch tests showed that four sulfonamides were not interrupted by the wastewater on instrument analysis However tetracyclines were significantly adsorbed by livestock wastewater In the test of sludge adsorption little adsorption was observed for sulfonamides but rapid and significant adsorption was observed for tetracyclines In the tests of biodegradation sulfonamides could be completely removed by the enriched sludge which was fed with sulfonamides for a long time but it was found that tetracyclines were not degraded during tests Overall this study could help to clarify the fate and behavior of sulfonamide and tetracyclines in the activated sludge process and assess consequent environmental risks arising from sludge disposal as well
Date of Award2015 Aug 6
Original languageEnglish
SupervisorWan-Ru Chen (Supervisor)

Cite this

Sorption and biodegradation of veterinary antibiotics in livestock wastewater treatment process
荏鴻, 王. (Author). 2015 Aug 6

Student thesis: Master's Thesis