The Experts below are selected from a list of 213726 Experts worldwide ranked by ideXlab platform
Yi Zhang - One of the best experts on this subject based on the ideXlab platform.
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Impact of applied current on sulfate-rich wastewater treatment and microbial biodiversity in the cathode chamber of microbial electrolysis cell (MEC) reactor
'Elsevier BV', 2017Co-Authors: Wang Kai, Sheng Yuxing, Cao Hongbin, Yan Keping, Yi ZhangAbstract:Microbial electrolysis cell (MEC) coupled with sulfate-reducing bacteria (SRB) was used to degrade sulfate-rich wastewater which was deficient in electron donors. Results confirmed that SRB could trigger vigorous synergy with an applied current. An applied electrical field of 1.5 mA (R1) resulted in the highest sulfate removal, which was 14.9% higher than that of the control reactor (R0). In addition, organic substance consumption decreased with the increase of applied current. The concentration of lactic dehydrogenase (LDH), an indicator of cell rupture, increased by 3.59 times at 2.5 mA; that of ATP, an indicator of cell metabolism, sharply decreased under 2.5 and 3.5 mA. This finding indicated that high current led to plasmatorrhexis, Low Growth Rate, and metabolic activity, subsequently reduced sulfate-reduction efficiency. Conversely, a proper current resulted in the enhancement of extracellular secretion, which was conducive to biofilm formation as further confirmed by detection through SEM. Electrochemical impedance spectroscopy (EIS) illustRated the SRB in the biofilm could acceleRate the Rate of direct electron transfer to cathode. Genus-level results further revealed that the dominant bacterium Desulfovibrio, an SRB, was richer in the cathode biofilm and RI, compared with RO. (C) 2016 Elsevier B.V. All rights reserved.
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impact of applied current on sulfate rich wastewater treatment and microbial biodiversity in the cathode chamber of microbial electrolysis cell mec reactor
Chemical Engineering Journal, 2017Co-Authors: Yi Zhang, Kai Wang, Yuxing ShengAbstract:Abstract Microbial electrolysis cell (MEC) coupled with sulfate-reducing bacteria (SRB) was used to degrade sulfate-rich wastewater which was deficient in electron donors. Results confirmed that SRB could trigger vigorous synergy with an applied current. An applied electrical field of 1.5 mA (R1) resulted in the highest sulfate removal, which was 14.9% higher than that of the control reactor (R0). In addition, organic-substance consumption decreased with the increase of applied current. The concentration of lactic dehydrogenase (LDH), an indicator of cell rupture, increased by 3.59 times at 2.5 mA; that of ATP, an indicator of cell metabolism, sharply decreased under 2.5 and 3.5 mA. This finding indicated that high current led to plasmatorrhexis, Low Growth Rate, and metabolic activity, subsequently reduced sulfate-reduction efficiency. Conversely, a proper current resulted in the enhancement of extracellular secretion, which was conducive to biofilm formation as further confirmed by detection through SEM. Electrochemical impedance spectroscopy (EIS) illustRated the SRB in the biofilm could acceleRate the Rate of direct electron transfer to cathode. Genus-level results further revealed that the dominant bacterium Desulfovibrio , an SRB, was richer in the cathode biofilm and R1, compared with R0.
Dieter Schmeisser - One of the best experts on this subject based on the ideXlab platform.
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quantum size effects in tio2 thin films grown by atomic layer deposition
Beilstein Journal of Nanotechnology, 2014Co-Authors: Massimo Tallarida, Dieter SchmeisserAbstract:We study the atomic layer deposition of TiO2 by means of X-ray absorption spectroscopy. The Ti precursor, titanium isopropoxide, was used in combination with H2O on Si/SiO2 substRates that were heated at 200 °C. The Low Growth Rate (0.15 A/cycle) and the in situ characterization permitted to folLow changes in the electronic structure of TiO2 in the sub-nanometer range, which are influenced by quantum size effects. The modified electronic properties may play an important role in charge carrier transport and separation, and increase the efficiency of energy conversion systems.
Kai Wang - One of the best experts on this subject based on the ideXlab platform.
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impact of applied current on sulfate rich wastewater treatment and microbial biodiversity in the cathode chamber of microbial electrolysis cell mec reactor
Chemical Engineering Journal, 2017Co-Authors: Yi Zhang, Kai Wang, Yuxing ShengAbstract:Abstract Microbial electrolysis cell (MEC) coupled with sulfate-reducing bacteria (SRB) was used to degrade sulfate-rich wastewater which was deficient in electron donors. Results confirmed that SRB could trigger vigorous synergy with an applied current. An applied electrical field of 1.5 mA (R1) resulted in the highest sulfate removal, which was 14.9% higher than that of the control reactor (R0). In addition, organic-substance consumption decreased with the increase of applied current. The concentration of lactic dehydrogenase (LDH), an indicator of cell rupture, increased by 3.59 times at 2.5 mA; that of ATP, an indicator of cell metabolism, sharply decreased under 2.5 and 3.5 mA. This finding indicated that high current led to plasmatorrhexis, Low Growth Rate, and metabolic activity, subsequently reduced sulfate-reduction efficiency. Conversely, a proper current resulted in the enhancement of extracellular secretion, which was conducive to biofilm formation as further confirmed by detection through SEM. Electrochemical impedance spectroscopy (EIS) illustRated the SRB in the biofilm could acceleRate the Rate of direct electron transfer to cathode. Genus-level results further revealed that the dominant bacterium Desulfovibrio , an SRB, was richer in the cathode biofilm and R1, compared with R0.
Ping Zheng - One of the best experts on this subject based on the ideXlab platform.
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microbial and physicochemical characteristics of compact anaerobic ammonium oxidizing granules in an upfLow anaerobic sludge blanket reactor
Applied and Environmental Microbiology, 2010Co-Authors: Fang Fang, Wenming Xie, Boran Kartal, Xianwei Liu, Guoping Sheng, Mike S M Jetten, Ping ZhengAbstract:Anaerobic ammonium oxidation (anammox) is a promising new process to treat high-strength nitrogenous wastewater. Due to the Low Growth Rate of anaerobic ammonium-oxidizing bacteria, efficient biomass retention is essential for reactor operation. Therefore, we studied the settling ability and community composition of the anaerobic ammonium-oxidizing granules, which were cultivated in an upfLow anaerobic sludge blanket (UASB) reactor seeded with aerobic granules. With this seed, the start-up period was less than 160 days at a NH4+-N removal efficiency of 94% and a loading Rate of 0.064 kg N per kg volatile suspended solids per day. The formed granules were bright red and had a high settling velocity (41 to 79 m h−1). Cells and extracellular polymeric substances were evenly distributed over the anaerobic ammonium-oxidizing granules. The high percentage of anaerobic ammonium-oxidizing bacteria in the granules could be visualized by fluorescent in situ hybridization and electron microscopy. The copy numbers of 16S rRNA genes of anaerobic ammonium-oxidizing bacteria in the granules were determined to be 4.6 × 108 copies ml−1. The results of this study could be used for a better design, shorter start-up time, and more stable operation of anammox systems for the treatment of nitrogen-rich wastewaters.
Huili Grace Xing - One of the best experts on this subject based on the ideXlab platform.
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ingan channel high electron mobility transistor structures grown by metal organic chemical vapor deposition
Applied Physics Letters, 2012Co-Authors: Oleg Laboutin, Wayne Johnson, Ronghua Wang, Guowang Li, Debdeep Jena, Huili Grace XingAbstract:High electron mobility transistor (HEMT) structures of AlInGaN/AlN/InGaN/GaN were grown by metal-organic chemical vapor deposition. A combination of Low Growth Rate and high Growth temperature during synthesis of the InGaN channel layer led to significant improvement in HEMT electron transport properties. The improvement was correlated with an evolution of both surface roughness and photoluminescence intensity of InGaN. Record electron mobilities from 1070 to 1290 cm2/V·s with associated sheet charge density of ∼2 × 1013 cm−2 were obtained across the InxGa1-xN channel composition range x = 0.05 to 0.10.
