Item


Long-term assessment of the six-stacked scaled-up MFCs treating swine manure with different electrode materials

Microbial fuel cells (MFCs) technology is a bio-approach to remove organic matter and nitrogen from wastewater with concomitant production of renewable electricity. Nowadays, it exists a clear interest in moving MFCs towards application. This study aimed to demonstrate MFCs technology feasibility treating swine manure. A couple of 6-stacked MFCs presenting a total volume of 115 L were designed and operated to treat swine manure at 50 L·d-1 for more than 6 months. Two different electrodes were tested, one for each stacked MFC: Granular graphite (GG-MFC) and stainless steel mesh (SS-MFC). Organic matter was oxidised in the anode compartments, ammonium was oxidized to nitrate in an external aerated reactor, and nitrate was reduced to dinitrogen gas in the biocathodes. GG and SS-MFCs reached similar organic matter and nitrogen removal rates (1.9±0.3 kg COD m-3 d-1; 0.35±0.02 kg N m-3 d-1) with power densities between 2-4 Wm-3, being the central units the most electroactive. However, the GG-MFC performance declined overtime due to electrode crushing and the clogging of granular graphite which reduced its applicability in comparison with stainless steel. The application of stacked SS-MFC with mixed electric circuit is a feasible strategy to maintain or even improve treatment efficiencies and power densities when scaling-up MFCs

This research was financially supported by the 532 Company Abengoa Water within the TEcoAgua project (CIEN-20091028), the Spanish 533 Government (CTQ2014-53718-R) and the Catalan Government (2014 FI-B 00093)

Royal Society of Chemistry (RSC)

Manager: Ministerio de Economía y Competitividad (Espanya)
Author: Vilajeliu Pons, Anna
Puig Broch, Sebastià
Salcedo Dávila, Inmaculada
Balaguer i Condom, Maria Dolors
Colprim Galceran, Jesús
Date: 2018 June 5
Abstract: Microbial fuel cells (MFCs) technology is a bio-approach to remove organic matter and nitrogen from wastewater with concomitant production of renewable electricity. Nowadays, it exists a clear interest in moving MFCs towards application. This study aimed to demonstrate MFCs technology feasibility treating swine manure. A couple of 6-stacked MFCs presenting a total volume of 115 L were designed and operated to treat swine manure at 50 L·d-1 for more than 6 months. Two different electrodes were tested, one for each stacked MFC: Granular graphite (GG-MFC) and stainless steel mesh (SS-MFC). Organic matter was oxidised in the anode compartments, ammonium was oxidized to nitrate in an external aerated reactor, and nitrate was reduced to dinitrogen gas in the biocathodes. GG and SS-MFCs reached similar organic matter and nitrogen removal rates (1.9±0.3 kg COD m-3 d-1; 0.35±0.02 kg N m-3 d-1) with power densities between 2-4 Wm-3, being the central units the most electroactive. However, the GG-MFC performance declined overtime due to electrode crushing and the clogging of granular graphite which reduced its applicability in comparison with stainless steel. The application of stacked SS-MFC with mixed electric circuit is a feasible strategy to maintain or even improve treatment efficiencies and power densities when scaling-up MFCs
This research was financially supported by the 532 Company Abengoa Water within the TEcoAgua project (CIEN-20091028), the Spanish 533 Government (CTQ2014-53718-R) and the Catalan Government (2014 FI-B 00093)
Document access: http://hdl.handle.net/2072/319721
Language: eng
Publisher: Royal Society of Chemistry (RSC)
Rights: Attribution 3.0 Spain
Rights URI: http://creativecommons.org/licenses/by/3.0/es/
Subject: Aigües residuals -- Depuració -- Desnitrificació
Sewage -- Purification -- Nitrogen removal
Aigües residuals -- Depuració -- Eliminació de compostos orgànics
Sewage -- Purification -- Organic compounds removal
Title: Long-term assessment of the six-stacked scaled-up MFCs treating swine manure with different electrode materials
Type: info:eu-repo/semantics/article
Repository: Recercat

Subjects

Authors


Warning: Unknown: write failed: No space left on device (28) in Unknown on line 0

Warning: Unknown: Failed to write session data (files). Please verify that the current setting of session.save_path is correct (/var/lib/php5) in Unknown on line 0