Interaction between Swine Manure Containing Sulfachloropyridazine (SCP) and Anaerobic Digestion (AD) Process for Volatile Fatty Acids (VFAs): SCP Reduction, VFAs Production and Microbial Communities

Abstract

Anaerobic digestion (AD) for volatile fatty acids (VFAs) production has attracted much attention due to their high benefit. However, antibiotics have been detected in swine manure, but the interaction between AD process for VFAs and antibiotics has not been clearly understood. This research aims to investigate the antibiotic of sulfachloropyridazine (SCP) reduction and its effects on VFA accumulation and microbial community structures during AD process for VFA production. Results showed that initial SCP concentration has a positive correlation with reduction of SCP and accumulation of VFAs, and the removal rates of SCP were 22.21%, 30.00%, 39.31% and 42.59% and the maximum production of VFAs were 4005, 3947, 6180, 6462 and 6032 mg/L for initial SCP concentrations of 0, 25, 50, 75 and 100 mg/kg·TS, respectively. SCP did not increase bacterial diversity but altered bacterial composition.

Keywords: sulfachloropyridazine, Anaerobic digestion, Volatile fatty acids, degradation, microbial community