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Electricity generation from industrial wastewaters in bioelectrochemical systems

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Electricity generation from industrial wastewaters in bioelectrochemical systems. / Haavisto, Johanna.

Tampere University, 2019. 70 p. (Tampere University Dissertations; Vol. 136).

Research output: Book/ReportDoctoral thesisCollection of Articles

Harvard

Haavisto, J 2019, Electricity generation from industrial wastewaters in bioelectrochemical systems. Tampere University Dissertations, vol. 136, vol. 136, Tampere University.

APA

Haavisto, J. (2019). Electricity generation from industrial wastewaters in bioelectrochemical systems. (Tampere University Dissertations; Vol. 136). Tampere University.

Vancouver

Haavisto J. Electricity generation from industrial wastewaters in bioelectrochemical systems. Tampere University, 2019. 70 p. (Tampere University Dissertations).

Author

Haavisto, Johanna. / Electricity generation from industrial wastewaters in bioelectrochemical systems. Tampere University, 2019. 70 p. (Tampere University Dissertations).

Bibtex - Download

@book{0ce819e08c4d4a5995371b4e5e4a83d1,
title = "Electricity generation from industrial wastewaters in bioelectrochemical systems",
abstract = "Brewing and pulp and paper making are water-intensive industries generating biodegradable wastewaters that need to be treated prior to discharge. These wastewaters are generally treated with conventional activated sludge process, producing good quality effluent. To avoid energy intensive aeration, anaerobic methods are another option for the treatment. In microbial fuel cells (MFCs), electrochemically active microorganisms degrade organic compounds with simultaneous electricity generation. Compared to more traditional methanogenic treatment, MFCs can be operated at lower temperatures and with less concentrated wastewaters. The aim of this work was to study the applicability of MFCs for treatment and resource recovery from synthetic wastewaters and real brewery and thermomechanical (TMP) wastewaters. Varying wastewater flow rates and compositions are typical for industrial operations, but challenging for biological treatment processes. For this reason, as a preparation to possible process upsets, different start-up methods were studied to accelerate the start-up of bioelectrochemical treatment. In addition, stable operation was optimized by comparing different anode electrode materials and organic loading rates. The start-up was studied in semi-continuously operated air-cathode and three-chamber MFCs, and process optimization in a continuously fed up-flow MFC. Among studied electrochemical methods, -200 mV vs. Ag/AgCl adjusted anode potential resulted in the highest average power density of 0.65 Wm-3 after the start-up in brewery wastewater fed reactors. MFCs inoculated with stored (at +4 or -20 °C) anolyte demonstrated for the first time that power densities recovered after one month storing, but not after six months storing. Granular activated carbon was the most potential anode electrode material among the studied electrode materials. In xylose-fed up-flow MFC, organic loading rates of 0.31 and 0.53 gCODL-1d-1 enabled the highest power densities.This study demonstrates the applicability of brewery and for the first time TMP wastewaters for bioelectrochemical treatment in MFCs. Power densities can likely be further increased by optimizing MFC design and operation. Partial removal of degradable compounds in brewery and TMP wastewater indicated the need for e.g. aerobic post-treatment.",
author = "Johanna Haavisto",
year = "2019",
month = "10",
day = "4",
language = "English",
isbn = "978-952-03-1263-3",
volume = "136",
series = "Tampere University Dissertations",
publisher = "Tampere University",

}

RIS (suitable for import to EndNote) - Download

TY - BOOK

T1 - Electricity generation from industrial wastewaters in bioelectrochemical systems

AU - Haavisto, Johanna

PY - 2019/10/4

Y1 - 2019/10/4

N2 - Brewing and pulp and paper making are water-intensive industries generating biodegradable wastewaters that need to be treated prior to discharge. These wastewaters are generally treated with conventional activated sludge process, producing good quality effluent. To avoid energy intensive aeration, anaerobic methods are another option for the treatment. In microbial fuel cells (MFCs), electrochemically active microorganisms degrade organic compounds with simultaneous electricity generation. Compared to more traditional methanogenic treatment, MFCs can be operated at lower temperatures and with less concentrated wastewaters. The aim of this work was to study the applicability of MFCs for treatment and resource recovery from synthetic wastewaters and real brewery and thermomechanical (TMP) wastewaters. Varying wastewater flow rates and compositions are typical for industrial operations, but challenging for biological treatment processes. For this reason, as a preparation to possible process upsets, different start-up methods were studied to accelerate the start-up of bioelectrochemical treatment. In addition, stable operation was optimized by comparing different anode electrode materials and organic loading rates. The start-up was studied in semi-continuously operated air-cathode and three-chamber MFCs, and process optimization in a continuously fed up-flow MFC. Among studied electrochemical methods, -200 mV vs. Ag/AgCl adjusted anode potential resulted in the highest average power density of 0.65 Wm-3 after the start-up in brewery wastewater fed reactors. MFCs inoculated with stored (at +4 or -20 °C) anolyte demonstrated for the first time that power densities recovered after one month storing, but not after six months storing. Granular activated carbon was the most potential anode electrode material among the studied electrode materials. In xylose-fed up-flow MFC, organic loading rates of 0.31 and 0.53 gCODL-1d-1 enabled the highest power densities.This study demonstrates the applicability of brewery and for the first time TMP wastewaters for bioelectrochemical treatment in MFCs. Power densities can likely be further increased by optimizing MFC design and operation. Partial removal of degradable compounds in brewery and TMP wastewater indicated the need for e.g. aerobic post-treatment.

AB - Brewing and pulp and paper making are water-intensive industries generating biodegradable wastewaters that need to be treated prior to discharge. These wastewaters are generally treated with conventional activated sludge process, producing good quality effluent. To avoid energy intensive aeration, anaerobic methods are another option for the treatment. In microbial fuel cells (MFCs), electrochemically active microorganisms degrade organic compounds with simultaneous electricity generation. Compared to more traditional methanogenic treatment, MFCs can be operated at lower temperatures and with less concentrated wastewaters. The aim of this work was to study the applicability of MFCs for treatment and resource recovery from synthetic wastewaters and real brewery and thermomechanical (TMP) wastewaters. Varying wastewater flow rates and compositions are typical for industrial operations, but challenging for biological treatment processes. For this reason, as a preparation to possible process upsets, different start-up methods were studied to accelerate the start-up of bioelectrochemical treatment. In addition, stable operation was optimized by comparing different anode electrode materials and organic loading rates. The start-up was studied in semi-continuously operated air-cathode and three-chamber MFCs, and process optimization in a continuously fed up-flow MFC. Among studied electrochemical methods, -200 mV vs. Ag/AgCl adjusted anode potential resulted in the highest average power density of 0.65 Wm-3 after the start-up in brewery wastewater fed reactors. MFCs inoculated with stored (at +4 or -20 °C) anolyte demonstrated for the first time that power densities recovered after one month storing, but not after six months storing. Granular activated carbon was the most potential anode electrode material among the studied electrode materials. In xylose-fed up-flow MFC, organic loading rates of 0.31 and 0.53 gCODL-1d-1 enabled the highest power densities.This study demonstrates the applicability of brewery and for the first time TMP wastewaters for bioelectrochemical treatment in MFCs. Power densities can likely be further increased by optimizing MFC design and operation. Partial removal of degradable compounds in brewery and TMP wastewater indicated the need for e.g. aerobic post-treatment.

M3 - Doctoral thesis

SN - 978-952-03-1263-3

VL - 136

T3 - Tampere University Dissertations

BT - Electricity generation from industrial wastewaters in bioelectrochemical systems

PB - Tampere University

ER -