Pollutant Removal and Energy Recovery from Swine Wastewater Using Anaerobic Membrane Bioreactor: A Comparative Study with Up-Flow Anaerobic Sludge Blanket

Due to its high content of organics and nutrients, swine wastewater has become one the main environment pollution sources. Exploring high-efficient technologies for treatment is urgent becoming a hot topic in recent years. The present study introduces anaerobic membrane bioreactor (AnMBR) efficient wastewater, compared with up-flow sludge blanket (UASB) as traditional system. Pollutant removal performance, methanogenic properties, microbial community structures were investigated both reactors. Results showed that by intercepting particulate organics, AnMBR achieved stable much higher chemical oxygen demand (COD) rate (approximately 90%) than UASB (around 60%). activity sludge, methane yield (0.23 L/g-COD) was UASB. Microbial structure analysis enrichment functional bacteria can remove refractory organic matter AnMBR, which promoted conversion processes. In addition, obvious accumulation acetotrophic hydrotrophic methanogens system recorded, could broaden degradation pathways methanogenesis processes, ensuring yield. Through energy balance analysis, results concluded net recovery efficiency system, indicating applying livestock not only efficiently pollutants, but also significantly enhance recovery.