Enhanced bioelectrochemical nitrogen removal in flow through electrodes

In the past decade, bioelectrochemical systems (BESs) have been studied extensively for generation of power and maximizing densities. recent years, it was noticed that BESs applications can critically improve wastewater treatment. Most previous work has used varied reactor geometry configuration, composition, electrolyte solution, constant electrode size to maximize generation. However, there is limited research investigating influence increased on treatment process. We investigated effect surface area efficiency mechanism nitrogen removal. this study, we developed a flow-through in 3-electrode reactor. The anodic biofilms were enriched electrodes one week. Following enrichment period, operated semi-continuous mode with raw domestic wastewater. To investigate efficiency, chemical oxygen demand (COD), total (TN), ammonia (NH3-N), nitrite (NO2–-N), nitrate (NO3–-N) concentrations measured. found anode did not significantly contribute COD removal rate, most likely indicating limits BES. On other hand, TN rate proportionally also outlet NO3–-N NO2–-N 1.2 ± 0.2 3.2 0.9 mg/L, respectively. Our results indicated possible remove simultaneously. Analysis microbial community structure showed dominated by sulfidogenesis, oxidation, autotrophic heterotrophic denitrification as well reducing using Geobacter species our system.