Antibiotics are commonly used in livestock for preventing diseases and promote growth. However, the presence of antibiotics in the wastewater from livestock farm can cause negative effect on the various biological treatment processes such as activated sludge, anaerobic digestion In this study, we aimed to evaluate the effect of some common used antibiotics in the Korea livestock farm such as bezathine penicillin G, procaine penicillin G and sulfadimethoxine sodium to nitrification efficiency as well as organic compounds removal rate in biological system for treating swine wastewater. The experiment was conducted in aeration batch reactor and using activated sludge collecting from municipal wastewater treatment plant. For batch test, diluted piggery wastewater was used, two commercial antibiotics products, PPS (mainly consisted of bezathine/procaine penicillin G) and SULFA-40 (sulfadimethoxine sodium) were selected for subsequent experiment. The control and each antibiotic experiment were conducted identically in 1.0 L batch reactor. The results showed that the nitrification rate is reduced when the addition of PPS increase in range of 50 - 500 ppm. The profile of NOx - during the batch test indicated that the decrease of ammonium oxidation rate is mostly due to the decline of ammonia oxidizing bacteria (AOB) activity. In the different way, the nitrification rate was not significantly affected by the SULFA-40 under the antibiotic concentration up to 700 ppm. COD removal rate was also examined, it showed that the oxidation of biodegradable organic matters were not inhibited by such commercial antibiotic products. However, it seemed that those antibiotics are hardly degraded biologically after short acclimation time using activated sludge. Further work for evaluating the long-term effect of common used antibiotics should be done in order to stabilize the biological treatment system of livestock wastewater.
한국생물공학회 [The Korean Society for Biotechnology and Bioengineering]
설립연도
1984
분야
공학>생물공학
소개
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