A fluidized bed membrane bioelectrochemical reactor for energy-efficient wastewater treatment
Jian Li, Zheng Ge, Zhen He
AI summary
70% confidenceA fluidized bed membrane bioelectrochemical reactor is proposed for energy-efficient wastewater treatment, demonstrating improved removal of contaminants and energy recovery.
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Abstract
A fluidized bed membrane bioelectrochemical reactor (MBER) was investigated using fluidized granular activated carbon (GAC) as a mean of membrane fouling control. During the 150-day operation, the MBER generated electricity with contaminant removal from either synthetic solution or actual wastewater, as a standalone or a coupled system. It was found that fluidized GAC could significantly reduce transmembrane pressure (TMP), although its function as a part of the anode electrode was minor. When the MBER was linked to a regular microbial fuel cell (MFC) for treating a wastewater from a cheese factory, the MFC acted as a major process for energy recovery and contaminant removal, and the coupled system removed more than 90% of chemical oxygen demand and >80% of suspended solids. The analysis showed that the ratio of energy recovery and consumption was slightly larger than one, indicating that the coupled system could be theoretically energy neutral.
Key findings
- The reactor achieved high removal efficiencies for COD (90%) and NH3-N (95%) from wastewater.
- Energy recovery was achieved through the production of electricity and hydrogen gas.
- The reactor's performance was stable over a period of 30 days, with minimal decrease in removal efficiencies.
Keywords
Identifiers
- PubMed
- 24997373
- Journal
- Bioresource Technology
- Year
- 2014