2023 journal article

Combined effects of oxytetracycline concentration and organic loading rate on semi-continuous anaerobic digestion of swine wastewater

BIORESOURCE TECHNOLOGY, 382.

By: Z. Huang*, Q. Niu*, W. Nie*, Y. Lin*, S. Wu*, X. Li*, J. Cheng n, C. Yang*

co-author countries: China 🇨🇳 United States of America 🇺🇸
author keywords: Methane; Extracellular polymeric substance; Microbial activity; Antibiotic; Biological treatment
MeSH headings : Animals; Swine; Wastewater; Waste Disposal, Fluid / methods; Oxytetracycline; Anaerobiosis; Bioreactors; Anti-Bacterial Agents; Methane
Source: Web Of Science
Added: July 10, 2023

High concentrations of antibiotics in swine wastewater raises concerns about the potential adverse effects of anaerobic digestion (AD). Current studies mainly focused on the effects of various antibiotic concentrations. However, these studies didn't take into account the fluctuation of swine wastewater quality and the change of reactor operating conditions in practical engineering applications. In this study, it was found that in the operating systems with COD of 3300 mg/L and hydraulic retention time (HRT) of 4.4 days, the continuous addition of oxytetracycline for 30 days had no effect on the AD performance. Nevertheless, when COD and HRT were changed to 4950 mg/L and 1.5 days respectively, oxytetracycline at 2 and 8 mg/L increased the cumulative methane yield by 27% and 38% at the cost of destroying cell membrane, respectively, while oxytetracycline at 0.3 mg/L improved the performance and stability of AD. These results could be referred for practical engineering applications.