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首页> 外文期刊>Environmental toxicology and chemistry >Inhibition of microbial metabolism in anaerobic lagoons by selected sulfonamides, tetracyclines, lincomycin, and tylosin tartrate.
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Inhibition of microbial metabolism in anaerobic lagoons by selected sulfonamides, tetracyclines, lincomycin, and tylosin tartrate.

机译：选定的磺酰胺，四环素，林可霉素和酒石酸泰乐菌素可抑制厌氧泻湖中的微生物代谢。

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摘要

Antibiotics are used to maintain healthy livestock and to promote weight gain in concentrated animal feed operations. Antibiotics rarely are metabolized completely by livestock and, thus, are often present in livestock waste and in waste-treatment lagoons. The introduction of antibiotics into anaerobic lagoons commonly used for swine waste treatment has the potential for negative impacts on lagoon performance, which relies on a consortium of microbes ranging from fermentative microorganisms to methanogens. To address this concern, the effects of eight common veterinary antibiotics on anaerobic activity were studied. Anaerobic microcosms, prepared from freshly collected lagoon slurries, were amended with individual antibiotics at 10 mg/L for the initial screening study and at 1, 5, and 25 mg/L for the dose-response study. Monitored metabolic indicators included hydrogen, methane, and volatile fatty acid concentrations as well as chemical oxygen demand. The selected antibiotics significantly inhibited methane production relative to unamended controls, thus indicating that antibiotics at concentrations commonly found in swine lagoons can negatively impact anaerobic metabolism. Additionally, historical antibiotic usage seems to be a potential factor in affecting methane production. Specifically, less inhibition of methane production was noted in samples taken from the lagoon with a history of multiple-antibiotic use.
机译：抗生素可用于维持健康的牲畜并在浓缩的动物饲料操作中促进体重增加。抗生素很少被牲畜完全代谢，因此经常存在于牲畜废物和废物处理泻湖中。将抗生素引入通常用于猪粪处理的厌氧泻湖中，可能会对泻湖性能产生负面影响，这取决于从发酵微生物到产甲烷菌的微生物群。为了解决这个问题，研究了八种常见兽用抗生素对厌氧活性的影响。由新鲜收集的泻湖浆液制备的厌氧微生物世界，分别以10 mg / L的抗生素进行了初步筛选研究，并以1、5和25 mg / L的剂量对抗生素进行了修正。监测的代谢指标包括氢气，甲烷和挥发性脂肪酸浓度以及化学需氧量。相对于未经修改的对照，所选择的抗生素显着抑制了甲烷的产生，因此表明猪泻湖中常见浓度的抗生素会对厌氧代谢产生负面影响。此外，历史上抗生素的使用似乎是影响甲烷生产的潜在因素。具体而言，从泻湖中采集的具有多种抗生素使用史的样品中对甲烷产生的抑制作用较小。

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