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The treatment of PPCP-containing sewage in an anoxic/aerobic reactor coupled with a novel design of solid plain graphite-plates microbial fuel cell.

Chang YT, Yang CW, Chang YJ, Chang TC, Wei DJ - Biomed Res Int (2014)

Bottom Line: A novel design of solid plain graphite plates (SPGRPs) was used for the high surface area biodegradation of the PPCP-containing sewage and for the generation of electricity.A maximum power density of 532.61 mW/cm(2) and a maximum coulombic efficiency of 25.20% were measured for the SPGRP MFC at the anode.Distinct differences in the bacterial community were presented at various locations including the mixed liquor suspended solids and biofilms.

View Article: PubMed Central - PubMed

Affiliation: Department of Microbiology, Soochow University, 70 Linhsi Road, Shilin District, Taipei 11102, Taiwan.

ABSTRACT
Synthetic sewage containing high concentrations of pharmaceuticals and personal care products (PPCPs, mg/L level) was treated using an anoxic/aerobic (A/O) reactor coupled with a microbial fuel cell (MFC) at hydraulic retention time (HRT) of 8 h. A novel design of solid plain graphite plates (SPGRPs) was used for the high surface area biodegradation of the PPCP-containing sewage and for the generation of electricity. The average CODCr and total nitrogen removal efficiencies achieved were 97.20% and 83.75%, respectively. High removal efficiencies of pharmaceuticals, including acetaminophen, ibuprofen, and sulfamethoxazole, were also obtained and ranged from 98.21% to 99.89%. A maximum power density of 532.61 mW/cm(2) and a maximum coulombic efficiency of 25.20% were measured for the SPGRP MFC at the anode. Distinct differences in the bacterial community were presented at various locations including the mixed liquor suspended solids and biofilms. The bacterial groups involved in PPCP biodegradation were identified as Dechloromonas spp., Sphingomonas sp., and Pseudomonas aeruginosa. This design, which couples an A/O reactor with a novel design of SPGRP MFC, allows the simultaneous removal of PPCPs and successful electricity production.

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Related in: MedlinePlus

DGGE profiles analysis of the MFC A/O reactor in the MFC A/O system on the 109th day. Lines A, B, and C present the profiles of the MLSS, SPGRP biofilm, and PEM biofilm from the aerobic tank; lines D, E, and F present the profiles of the MLSS, SPGRP biofilm, and PEM biofilm from the anoxic reactor.
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fig5: DGGE profiles analysis of the MFC A/O reactor in the MFC A/O system on the 109th day. Lines A, B, and C present the profiles of the MLSS, SPGRP biofilm, and PEM biofilm from the aerobic tank; lines D, E, and F present the profiles of the MLSS, SPGRP biofilm, and PEM biofilm from the anoxic reactor.

Mentions: Figure 5 displays the biodiversity of bacterial community in the MFC A/O systems by comparing their DGGE profiles. Table 4 compares the RI values for the DGGE bands detected across the different bacterial populations. Distinct differences were found in the bacterial species present at the three sampling locations within the MFC A/O system. The highest difference in band number ratios was 86.96% and this occurred between the SPGRP biofilms in the anoxic reactor and the PEM biofilms in the aerobic reactor. Even the lowest difference in band number ratios was as high as 65.00%, which was between the PEM biofilms in anoxic reactor and MLSS in aerobic reactor. These findings indicate the various different bacterial communities are likely to play distinctly different roles in the two chambers. For example, redox shuttling within the MFC anoxic chamber appears mainly to be present within the SPGRP and PEM biofilms and does not seem to occur within the MLSS biofilm.


The treatment of PPCP-containing sewage in an anoxic/aerobic reactor coupled with a novel design of solid plain graphite-plates microbial fuel cell.

Chang YT, Yang CW, Chang YJ, Chang TC, Wei DJ - Biomed Res Int (2014)

DGGE profiles analysis of the MFC A/O reactor in the MFC A/O system on the 109th day. Lines A, B, and C present the profiles of the MLSS, SPGRP biofilm, and PEM biofilm from the aerobic tank; lines D, E, and F present the profiles of the MLSS, SPGRP biofilm, and PEM biofilm from the anoxic reactor.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4150452&req=5

fig5: DGGE profiles analysis of the MFC A/O reactor in the MFC A/O system on the 109th day. Lines A, B, and C present the profiles of the MLSS, SPGRP biofilm, and PEM biofilm from the aerobic tank; lines D, E, and F present the profiles of the MLSS, SPGRP biofilm, and PEM biofilm from the anoxic reactor.
Mentions: Figure 5 displays the biodiversity of bacterial community in the MFC A/O systems by comparing their DGGE profiles. Table 4 compares the RI values for the DGGE bands detected across the different bacterial populations. Distinct differences were found in the bacterial species present at the three sampling locations within the MFC A/O system. The highest difference in band number ratios was 86.96% and this occurred between the SPGRP biofilms in the anoxic reactor and the PEM biofilms in the aerobic reactor. Even the lowest difference in band number ratios was as high as 65.00%, which was between the PEM biofilms in anoxic reactor and MLSS in aerobic reactor. These findings indicate the various different bacterial communities are likely to play distinctly different roles in the two chambers. For example, redox shuttling within the MFC anoxic chamber appears mainly to be present within the SPGRP and PEM biofilms and does not seem to occur within the MLSS biofilm.

Bottom Line: A novel design of solid plain graphite plates (SPGRPs) was used for the high surface area biodegradation of the PPCP-containing sewage and for the generation of electricity.A maximum power density of 532.61 mW/cm(2) and a maximum coulombic efficiency of 25.20% were measured for the SPGRP MFC at the anode.Distinct differences in the bacterial community were presented at various locations including the mixed liquor suspended solids and biofilms.

View Article: PubMed Central - PubMed

Affiliation: Department of Microbiology, Soochow University, 70 Linhsi Road, Shilin District, Taipei 11102, Taiwan.

ABSTRACT
Synthetic sewage containing high concentrations of pharmaceuticals and personal care products (PPCPs, mg/L level) was treated using an anoxic/aerobic (A/O) reactor coupled with a microbial fuel cell (MFC) at hydraulic retention time (HRT) of 8 h. A novel design of solid plain graphite plates (SPGRPs) was used for the high surface area biodegradation of the PPCP-containing sewage and for the generation of electricity. The average CODCr and total nitrogen removal efficiencies achieved were 97.20% and 83.75%, respectively. High removal efficiencies of pharmaceuticals, including acetaminophen, ibuprofen, and sulfamethoxazole, were also obtained and ranged from 98.21% to 99.89%. A maximum power density of 532.61 mW/cm(2) and a maximum coulombic efficiency of 25.20% were measured for the SPGRP MFC at the anode. Distinct differences in the bacterial community were presented at various locations including the mixed liquor suspended solids and biofilms. The bacterial groups involved in PPCP biodegradation were identified as Dechloromonas spp., Sphingomonas sp., and Pseudomonas aeruginosa. This design, which couples an A/O reactor with a novel design of SPGRP MFC, allows the simultaneous removal of PPCPs and successful electricity production.

Show MeSH
Related in: MedlinePlus