Functional enhancement of anaerobic digestion for ensuring the safety of dairy manure resource

本研究旨在建立一种新型的牛粪厌氧消化处理方法，以保证牛粪的安全性。我们假设奶牛粪便注射兽用抗生素，并专注于在厌氧消化过程中的抗生素耐药菌的生存，和厌氧消化泥浆中的抗生素耐药菌的电化学灭活。三个不同养殖场粪便样品的结果显示了相似的趋势，即厌氧消化后，除特定抗生素外，耐药性细菌的数量减少。电化学消毒过程减少了厌氧消化浆料中的耐药性细菌的数量。结果表明，间歇式中温厌氧消化和电化学处理可以降低畜禽粪便中耐药性细菌的相对风险。

The purpose of this study is to establish a novel management of dairy manure by anaerobic digestion for ensuring the safety. We assumed the manure from dairy cows injected with veterinary antibiotics, and focused on the survival of antibiotic resistant bacteria during anaerobic digestion, and electrochemical inactivation of antibiotic resistant bacteria in anaerobically digested slurry. Results with manure samples from three different farms showed a similar trend that numbers of antibiotic-resistant bacteria decreased after the anaerobic digestion except for specific antibiotics. The electrochemical disinfection process decreased numbers of antibiotic-resistant bacteria in the anaerobically digested slurry. The result indicates that the batch mesophilic anaerobic digestion and electrochemical process can reduce relative risks of antibiotic-resistance bacteria in livestock manure.