Journal
BIORESOURCE TECHNOLOGY
Volume 149, Issue -, Pages 244-252Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2013.09.048
Keywords
Anaerobic digestion; Antibiotic degradation; Biogas; Methane
Funding
- M.J. Murdock grant
- Washington State University Center for Sustaining Agriculture and Natural Resources BIOAg program
- Washington State University, College of Agricultural, Human, and Natural Resources Sciences, Agricultural Research Center
- U.S. Environmental Protection Agency (EPA) [FP-91714401-4]
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The impacts of four common animal husbandry antibiotics (ampicillin, florfenicol, sulfamethazine, and tylosin) on anaerobic digestion (AD) treatment efficiency and the potential for antibiotic degradation during digestion were evaluated. Sulfamethazine and ampicillin exhibited no impact on total biogas production up to 280 and 350 mg/L, respectively, although ampicillin inhibited biogas production rates during early stages of AD. Tylosin reduced biogas production by 10-38% between 130 and 913 mg/L. Florfenicol reduced biogas by similar to 5%, 40% and 75% at 6.4, 36 and 210 mg/L, respectively. These antibiotic concentrations are higher than commonly seen for mixed feedlot manure, so impacts on full scale AD should be minimal. Antibiotic degradation products were found, confirming AD effectively degraded ampicillin, florfenicol, and tylosin, although some products were persistent throughout the process. Contamination of AD solid and liquid effluents with sulfamethazine and antibiotic transformation products from florfenicol and tylosin could present an environmental concern. Published by Elsevier Ltd.
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