MESSAI.iO

AI summary

65% confidence

This study investigated the use of organic waste as a feedstock for bioelectricity generation in microbial fuel cells (MFCs) and found that food waste resulted in the highest power density and COD removal. The study also examined the effects of feed particle size and moisture content on MFC performance, finding that smaller particle sizes and higher moisture contents improved power density and COD removal.

Generated by MESSAI extraction pipeline · review against source PDF

Generic MFCRepresentative model
Click to animate flow
loading 3D model…

Representative MFC — matched on the paper’s system type only, not its reactor or geometry.

Extraction

Reported parameters

4 extracted values

View extracted values

Open in lab for full controls, parameter editing, and template overlays.

Open in lab →

What they did

System
MFC

What worked

No outcome metrics extracted yet.

Abstract

Food waste (FW), piggery waste (PW), and activated sludge (AS) were investigated as potential organic feeds for bioelectricity generation in laboratory-scale microbial fuel cells (MFCs). The MFCs fed by FW gained the highest maximum power density at 7.25 W/m³, followed by those fed by PW at 3.86 W/m³ and AS at 1.54 W/m³. The tCOD removal in the FW-, PW-, and AS-MFCs reached 76.9%, 63.9%, and 55.22%, respectively, within a 30-day retention time. Food waste, which resulted in the highest power density and tCOD removal, was selected for a series of following tests to investigate the effects of some physicochemical properties of organic feed on the performance of MFCs. The effect of feed particle size was tested with three controlled size ranges (i.e., 3, 1, and <1 mm) in MFCs. A smaller feed particle size provided a higher power density of 7.25 W/m³ and a tCOD removal of 76.9% compared to the MFCs fed with organic waste with a larger particle size. An increment in feed moisture from 70% to 90% improved the maximum power density from 7.2 to 8.5 W/m³, with a 17.5% enhancement, and improved the tCOD removal from 75.8% to 83.3%, with a 10.0% enhancement. A moderate C/N ratio of approximately 30/1 maximized the power density and COD removal (7.25 W/m³ and 81.73%) in the MFCs compared to C/N ratios of 20/1 (4.0 W/m³ and 64.14%) and 45/1 (4.38 W/m³ and 71.34%).

Key findings

  • [object Object]
  • [object Object]
  • [object Object]

Keywords

Microbial fuel cellWaste managementBiodegradable wasteBiochemical engineeringPulp and paper industryProcess engineering

Identifiers

DOI
10.3390/pr12061110
Journal
Processes
Year
2024