Degradation of tetracycline and sulfadiazine during continuous thermophilic composting of pig manure and sawdust
During composting, the thermophilic phase resulted in high degradation of antibiotics in the composting mass; thus temperature is considered as the major factor for degradation of antibiotics. Therefore, to achieve complete removal of antibiotics, the effect of continuous thermophilic composting on...
| Veröffentlicht in: | Environmental technology. - 1993. - 34(2013), 13-16 vom: 17. Juli, Seite 2433-41 |
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| Weitere Verfasser: | , , , , |
| Format: | Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2013
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| Zugriff auf das übergeordnete Werk: | Environmental technology |
| Schlagworte: | Journal Article Research Support, Non-U.S. Gov't Manure Soil Sulfadiazine 0N7609K889 Carbon Dioxide 142M471B3J Carbon 7440-44-0 mehr... |
| Zusammenfassung: | During composting, the thermophilic phase resulted in high degradation of antibiotics in the composting mass; thus temperature is considered as the major factor for degradation of antibiotics. Therefore, to achieve complete removal of antibiotics, the effect of continuous thermophilic composting on the degradation of antibiotics and their effect on antibiotic resistant bacteria in the pig manure were evaluated. Pig manure was mixed with sawdust, spiked with tetracycline (10 and 100 mg/kg) and sulfadiazine (2 and 20mg/kg) on dry weight (DW) basis and composted at 55 degrees C for six weeks. Based on the organic decomposition, the antibiotics did not affect the composting process significantly, but negatively influenced the bacterial population. Tetracycline clearly exhibited a negative but marginal influence on carbon decomposition at 100 mg/kg level. The bacterial population initially decreased steeply approximately 2 logs and slowly increased thereafter. Sulfadiazine and tetracycline resistant bacterial populations were stable/marginally increased after an initial decrease of about 2 or 3-5 logs, respectively. Sulfadiazine was not detectable after three days; whereas, approximately 8% of tetracycline was detected after 42 days of composting with a t(1/2) of approximately 11 days, irrespective of the initial concentration. The presence of tetracycline in the compost after 42 days of thermophilic composting indicates the involvement of a mesophilic microbial-mediated degradation; however, further studies are required to confirm the direct microbial involvement in the degradation of antibiotics |
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| Beschreibung: | Date Completed 16.01.2014 Date Revised 16.11.2017 published: Print Citation Status MEDLINE |
| ISSN: | 1479-487X |