Effect of packing material on organic matter removal efficiency in an anaerobic-aerobic baffled bioreactor.

Environmental technology

PubMedID: 28406061

Tabla-Hernandez J, Lopez-Galvan E. Effect of packing material on organic matter removal efficiency in an anaerobic-aerobic baffled bioreactor. Environ Technol. 2017;1-30.
THE AIM
of the present work was to study the effect of packing material on the organic matter removal efficiency (OMRE) in an anaerobic-aerobic baffled bioreactor (AAB).For this purpose, two different experiments were conducted with two types of packing material: activated carbon particles (AC) and polyurethane foam (PF). The system consisted of two treatments; the first one was anaerobic, where it took place hydrolysis, acetogenesis and methanogenesis. In anaerobic chambers, there were no packing material and the operating conditions were the same in both experiments. The second treatment was aerobic and both materials were placed at different times as a bedding. The parameters measured were: chemical oxygen demand (COD) dissolved chemical oxygen demand (CODd), total organic carbon (TOC), nitrate concentration (NO3(-)), ammonium concentration (NH4(+)), electric conductivity (s), alkalinity (Alky) and hydrogen potential (pH). Paired t-student test showed that there was no significant difference between the OMRE in anaerobic treatment, whereas there was in aerobic treatment, due to the effect of packing material. NH4(+) and NO3(-) showed a negative Pearson correlation in both experiments, witnessing the presence of the nitrification process in aerobic chamber. AAB packed with PF (AAB-PF) had better performance at obtaining an OMRE of around 63%, whereas AAB packed with AC (AAB-AC) presented an OMRE of around 51%.