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Bruce E Logan – One of the best experts on this subject based on the ideXlab platform.

  • evaluation of low cost cathode materials for treatment of industrial and food processing Wastewater using microbial electrolysis cells
    International Journal of Hydrogen Energy, 2013
    Co-Authors: A Tenca, Roland D Cusick, Andrea Schievano, R Oberti, Bruce E Logan

    Abstract Microbial electrolysis cells (MECs) can be used to treat Wastewater and produce hydrogen gas, but low cost cathode catalysts are needed to make this approach economical. Molybdenum disulfide (MoS 2 ) and stainless steel (SS) were evaluated as alternative cathode catalysts to platinum (Pt) in terms of treatment efficiency and energy recovery using actual Wastewaters. Two different types of Wastewaters were examined, a methanol-rich industrial (IN) Wastewater and a food processing (FP) Wastewater. The use of the MoS 2 catalyst generally resulted in better performance than the SS cathodes for both Wastewaters, although the use of the Pt catalyst provided the best performance in terms of biogas production, current density, and TCOD removal. Overall, the Wastewater composition was more of a factor than catalyst type for accomplishing overall treatment. The IN Wastewater had higher biogas production rates (0.8–1.8 m 3 /m 3 -d), and COD removal rates (1.8–2.8 kg-COD/m 3 -d) than the FP Wastewater. The overall energy recoveries were positive for the IN Wastewater (3.1–3.8 kWh/kg-COD removed), while the FP Wastewater required a net energy input of −0.7–−1.2 kWh/kg-COD using MoS 2 or Pt cathodes, and −3.1 kWh/kg-COD with SS. These results suggest that MoS 2 is the most suitable alternative to Pt as a cathode catalyst for Wastewater treatment using MECs, but that net energy recovery will be highly dependent on the specific Wastewater.

  • electricity generation and treatment of paper recycling Wastewater using a microbial fuel cell
    Applied Microbiology and Biotechnology, 2008
    Co-Authors: Liping Huang, Bruce E Logan

    Increased interest in sustainable agriculture and bio-based industries requires that we find more energy-efficient methods for treating cellulose-containing Wastewaters. We examined the effectiveness of simultaneous electricity production and treatment of a paper recycling plant Wastewater using microbial fuel cells. Treatment efficiency was limited by Wastewater conductivity. When a 50 mM phosphate buffer solution (PBS, 5.9 mS/cm) was added to the Wastewater, power densities reached 501 ± 20 mW/m2, with a coulombic efficiency of 16 ± 2%. There was efficient removal of soluble organic matter, with 73 ± 1% removed based on soluble chemical oxygoxygen demand (SCOD) and only slightly greater total removal (76 ± 4%) based on total COD (TCOD) over a 500-h batch cycle. Cellulose was nearly completely removed (96 ± 1%) during treatment. Further increasing the conductivity (100 mM PBS) increased power to 672 ± 27 mW/m2. In contrast, only 144 ± 7 mW/m2 was produced using an unamended Wastewater (0.8 mS/cm) with TCOD, SCOD, and cellulose removals of 29 ± 1%, 51 ± 2%, and 16 ± 1% (350-h batch cycle). These results demonstrate limitations to treatment efficiencies with actual Wastewaters caused by solution conductivity compared to laboratory experiments under more optimal conditions.

  • electricity generation from swine Wastewater using microbial fuel cells
    Water Research, 2005
    Co-Authors: Sang-eun Oh, John M Regan, Bruce E Logan

    Microbial fuel cells (MFCs) represent a new method for treating animal Wastewaters and simultaneously producing electricity. Preliminary tests using a two-chambered MFC with an aqueous cathode indicated that electricity could be generated from swine Wastewater containing 83207190 mg/L of soluble chemical oxygoxygen demand (SCOD) (maximum power density of 45 mW/m 2 ). More extensive tests with a single-chambered air cathode MFC produced a maximum power density with the animal Wastewater of 261 mW/m 2 (200O resistor), which was 79% larger than that previously obtained with the same system using domestic Wastewater (14678 mW/m 2 ) due to the higher concentration of organic matter in the swine Wastewater. Power generation as a function of substrate concentration was modeled according to saturation kinetics, with a maximum power density of Pmax ¼ 225 mW=m 2 (fixed 1000O resistor) and half-saturation

Antonis A. Zorpas – One of the best experts on this subject based on the ideXlab platform.

  • Testing an electrochemical method for treatment of textile dye Wastewater
    Waste Management, 2000
    Co-Authors: A G Vlyssides, Danai Papaioannou, M Loizidoy, P.k Karlis, Antonis A. Zorpas

    Wastewater from total dyeing and finishing stages (TDFW) and Wastewater only from dyeing stage (DW) from a Textile cellulosic reactive azo dyeing process were treated separately by an electrochemical method using Ti/Pt as anode and Stainless Steel 304 as cathode. In this technique, sodium chloride was used as an electrolyte and the mixture was passed through an electrolytic cell. Due to the strong oxidizing potential of the chemicals produced (chlorine, oxygen, hydroxyl radicals and other oxidants) the COD, BOD of the Wastewaters were substantially decreased using this electrochemical technique. A number of experiments were run in a batch 5 litre apparatus and the results of the electrochemical treatment on the two kinds of Wastewaters are reported here. The results indicate that the electrochemical method used is feasible for treatment of textile dyeing Wastewaters.

Elayne Emilia Santos Souza – One of the best experts on this subject based on the ideXlab platform.

  • Decolourisation effects of Vat Green 01 textile dye and textile Wastewater using H2O2/UV process
    Journal of Photochemistry and Photobiology A: Chemistry, 2007
    Co-Authors: Silvia Gabriela Schrank, Jean Nonato Ribeiro Dos Santos, Danillo Santos Souza, Elayne Emilia Santos Souza

    Wastewaters from textile industry contain various pollutants including a high content of organic matter, surfactants, additives and dyes. Dyes have obtained notoriety as hazardous substances, because most of them are toxic and considered to be resistant to biodegradation. Recently, advanced oxidation processes (AOP) have received considerable attention because it is possible to degrade organic compounds and colour from Wastewaters. The decolourisation of Vat Green 01 textile dyestuff and real textile Wastewater was investigated using UV radiation in the presence of H2O2 as function of pH, hydrogen peroxide concentration and dye concentration (in the study with the dyestuff). The results showed that the degradation increases as the initial H2O2 concentration increased up to a certain point at which hydrogen peroxide inhibited the Wastewater photolytic degradation. The decolourisation rate follows pseudo-first order kinetic with the respect to the dye concentration. ?? 2006 Elsevier B.V. All rights reserved.