Distribution of Antibiotics from the Wastewater Treatment Plant of a Swine Farm

• Main Authors: Huai-Shian Chiou, 邱懷嫻
• Other Authors: Kuei-Jyum Yeh
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/23020501341646098233

碩士 === 國立屏東科技大學 === 環境工程與科學系所 === 99 === The use of antibiotics is worldwide. In addition to be used in human and animal disease control, they are used as growth promoters in animal husbandry. Sulfonamides (SAs) and tetracyclines (TCs) are two kinds of antibiotics applied in concentrated animal feeding operations. The antibiotics can be discharged into the environment along with the effluents of wastewater treatment plants (WTP) of pig farms and thus pose a high risk to ecological systems and human health. Eight antibiotics contaminants, sulfadimethoxine (SDM), sulfamethazine (SMT), sulfamonomethoxine (SMM), sulfamerazine (SMR), sulfameter (SME), oxytetracycline (OTC), tetracycline (TC), and chlortetracycline (CTC) were tested in this study. In this study, a reliable and sensitive analytical procedure for SAs and TCs has been developed, using a combination of solid-phase extraction with liquid chromatography-tandem mass spectrometry (LC-MS-MS). It is found that the matrix in river sediments and solids in WTP units produced an interference for the LC-MS-MS analysis of SAs and TCs. The SAs and TCs were detected at every operation unit of the pig farm WTP at the average concentrations of 0.08~397.51 μgL-1. This study also evaluated the sorption-desorption and biodegradation of these antibiotic compounds in river sediments and suspended solids in the WTP. The SAs and TCs can be naturally photolyzed and degraded in water. The sulfonamides are adsorbed on WTP solids and river sediments in one day. A portion of the sorbed SAs is desorbed latter to the aqueous phase. The sorption-desorption behavior in sediments and WTP solids is associated with organic matter properties of the sediments and solids and the concentration of SAs. Biological decomposition is an important factor of sulfonamide distribution in the river sediment and WTP solid. The extent of biodegradation depends on the types and concentrations of SAs, and the adsorption/desorption and exposure of SAs in the sediment/WTP solids.