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The study evaluates the influence of inherent buffering nature of real field pharmaceutical wastewater on microbial fuel cell performance, showing improved electrogenic activity and power density with increasing organic loads.

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What they did

System
MFC

What worked

Power density137mW/m²

Abstract

Influence of inherent buffering nature of real field pharmaceutical wastewater (PW) was evaluated in a microbial fuel cell (MFC) at varying organic loads (OL1‐OL4). Dynamics of in situ buffers present in the wastewater during remediation enhanced the electrogenic activity. Improvement in power density (PD) and open circuit voltage (OCV) was observed as the organic load increased from OL1 to OL4 (PD of 62.45 to137 mW/m 2 ; OCV‐245 to 324 mV). It was concluded from the buffering capacity ( β ) profiles that base β values were relatively more stable than acid β values indicating the dynamics of nutrients and salts present in PW. pH increased with increase in OL documenting improvement in power output and waste remediation. Present study depicted an optimum pH range suitable for effective operation of MFC for bioelectrogenesis using PW as substrate. © 2013 American Institute of Chemical Engineers Environ Prog, 33: 454–462, 2014

Key findings

  • In situ buffers in wastewater enhance electrogenic activity
  • Power density and open circuit voltage improve with increasing organic loads
  • Base buffering capacity is relatively more stable than acid buffering capacity

Keywords

Microbial fuel cellEnvironmental remediationWastewaterOpen-circuit voltageNutrientSewage treatment

Identifiers

DOI
10.1002/ep.11809
Journal
Environmental Progress & Sustainable Energy
Year
2013