| 四环素类抗生素污染畜禽粪便的厌氧消化特征 |
| 摘要点击 4638 全文点击 2298 修订日期：2011-10-16 |
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| 中文关键词 四环素 金霉素 厌氧消化 畜禽粪便 生物降解 |
| 英文关键词 tetracycline (TC) chlortetracycline (CTC) anaerobic digestion animal manure biodegradation |
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| 中文摘要 |
| 应用间歇试验研究了外源添加四环素(TC)和金霉素(CTC)的猪粪中温(35℃)厌氧消化特征及抗生素的降解过程.结果表明,猪粪厌氧水解酸化过程中产生的挥发性脂肪酸以丙酸为主,乙酸次之; 相比于CTC添加组,TC+CTC混合添加组对易降解有机物的水解酸化有明显的抑制作用; 添加TC、CTC和TC+CTC组在45 d的消化期内累积产甲烷量分别为386.4、406.0和412.1 mL,与不添加TC和CTC的对照组(464.6 mL)相比,分别减少了16.8%、12.6%、11.3%.四环素和金霉素的降解过程符合一级反应动力学方程; 四环素降解的半衰期为14~18 d,金霉素为10 d.经过45 d厌氧消化处理后,四环素的降解率达88.6%~91.6%,金霉素达97.7%~98.2%.因此,畜禽粪便厌氧消化处理不仅能回收生物质能源,还能降解残留的四环素类抗生素,有效地降低抗生素污染产生的生态风险. |
| 英文摘要 |
| Anaerobic digestion of pig manure spiked with tetracycline(TC)and chlortetracycline(CTC)and the degradation of the two antibiotics during the anaerobic digestion at 35℃ were investigated. The results indicate that propionate was the main volatile fatty acid produced during the anaerobic digestion followed by acetate. Compared with the CTC addition, TC+CTC addition showed obvious inhibitory effect on the hydrolysis and acidification of easily digestible organic components of pig manure. The cumulative methane production of TC,CTC,TC+CTC and CK2 during anaerobic digestion was 386.4 mL, 406.0 mL, 412.1 mL and 464.6 mL, respectively. Degradation of TC and CTC followed the first-order kinetic equation. The half-life of TC and CTC was 14-18 days and 10 days, respectively. After the treatment of 45-day anaerobic digestion, the degradation efficiency of TC was 88.6%-91.6% with 97.7%-98.2% of CTC. Therefore, anaerobic digestion shows the benefit on the management of animal manures contaminated by tetracyclines. |
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