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https://www.readbyqxmd.com/read/28934676/simultaneous-biofiltration-of-btex-and-hg%C3%A2-from-a-petrochemical-waste-stream
#1
Mostafa Leili, Sima Farjadfard, George A Sorial, Bahman Ramavandi
A biofiltration system was developed to treat benzene, toluene, ethylbenzene, and xylene (BTEX) and Hg° vapour from a petrochemical waste stream during overhaul maintenance. The biofilter compost bed was inoculated with a microbial consortium provided by a petrochemical wastewater treatment plant. The effect of the a BTEX concentration (192.6-973.8 g/m(3)h) and empty bed residence time (EBRT) of 20-100 s were studied under the conditions of steady state, transient, shock BTEX-loading, and off-restart. The findings revealed that during a biofilter start-up, an increase in the influent BTEX concentration to around 334...
September 18, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28931205/bioelectrochemical-oxidation-of-organics-by-alkali-halotolerant-anodophilic-biofilm-under-nitrogen-deficient-alkaline-and-saline-conditions
#2
Tharanga N Weerasinghe Mohottige, Maneesha P Ginige, Anna H Kaksonen, Ranjan Sarukkalige, Ka Yu Cheng
This work aimed to study the feasibility of using bioelectrochemical systems (BES) for organics removal under alkaline-saline and nitrogen (N) deficient conditions. Two BES inoculated with activated sludge were examined for organics (oxalate, acetate, formate) oxidation under alkaline-saline (pH 9.5, 25g/L NaCl) and N deficient conditions. One reactor (R1) received ammonium chloride as an N-source, while the other (R2) without. The reactors were initially loaded with only oxalate (25mM), but start-up was achieved only when acetate was added as co-substrate (5mM)...
August 30, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28926915/bioelectrochemical-methane-ch4-production-in-anaerobic-digestion-at-different-supplemental-voltages
#3
Kwang-Soon Choi, Sanath Kondaveeti, Booki Min
Microbial electrolysis cells (MECs) at various cell voltages (0.5, 0.7 1.0 and 1.5V) were operated in anaerobic fermentation. During the start-up period, the cathode potential decreased from -0.63 to -1.01V, and CH4 generation increased from 168 to 199ml. At an applied voltage of 1.0V, the highest methane yields of 408.3ml CH4/g COD glucose was obtained, which was 30.3% higher than in the control tests (313.4ml CH4/g COD glucose). The average current of 5.1mA was generated at 1.0V at which the maximum methane yield was obtained...
September 8, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28926909/aerobic-composting-of-distilled-grain-waste-eluted-from-a-chinese-spirit-making-process-the-effects-of-initial-ph-adjustment
#4
Shi-Peng Wang, Xiao-Zhong Zhong, Ting-Ting Wang, Zhao-Yong Sun, Yue-Qin Tang, Kenji Kida
Aerobic composting of distilled grain waste (DGW) at different initial pH values adjusted by CaO addition was investigated. Three pH-adjusted treatments with initial pH values of 4 (R1), 5 (R2) and 6 (R3) and a control treatment (R0) with a pH value of 3.5 were conducted simultaneously. The results showed that R0 had an unsuccessful start-up of composting. However, the pH-adjusted treatments produced remarkable results, with a relatively high initial pH being beneficial for the start-up. Within 65days of composting, the degradation of volatile solids (VS) and the physicochemical properties of R2 and R3 displayed similar tendencies, and both produced a mature end-product, while R1 exhibited a lower VS degradation rate, and some of its physicochemical properties indicated the end-product was immature...
September 8, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28926908/importance-of-inoculum-source-and-initial-community-structure-for-biogas-production-from-agricultural-substrates
#5
Tong Liu, Li Sun, Bettina Müller, Anna Schnürer
This study evaluated the importance of inoculum source for start-up and operation of biogas processes. Three different inocula with different community structure were used to initiate six laboratory continuous stirred tank reactor (CSTR) processes operated with a grass manure mixture as substrate. The processes were evaluated by chemical and microbiological analysis, by targeting the overall bacterial community and potential cellulose-degrading bacteria. As expected, the results showed a large difference in community structure in the inocula and in process performance during the first hydraulic retention time (HRT)...
September 4, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28920947/the-capacity-building-approach-was-successful-in-the-start-up-process-of-the-first-hsct-center-in-iraqi-kurdistan
#6
I Majolino, A Rovelli, M Vacca, M Verna, M Canesi, V Conter, D Othman
No abstract text is available yet for this article.
September 18, 2017: Bone Marrow Transplantation
https://www.readbyqxmd.com/read/28914395/repetitive-on-demand-drug-release-from-polymeric-matrices-containing-a-macroscopic-spherical-iron-core
#7
Stefan A Rovers, Maartje F Kemmere, Jos T F Keurentjes, Richard Hoogenboom
A system for multiple on-demand drug release has been prepared that can be activated with an alternating magnetic field as external trigger. The core/shell samples have been developed based on a macroscopic spherical iron core coated with a thermoresponsive polymer, poly(styrene-stat-butyl methacrylate), containing ibuprofen as a model drug. During exposure of the samples to the magnetic field (ON state), the release rate of ibuprofen is significantly increased, up to 35 times the release rate without the magnetic field (OFF state)...
September 15, 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/28911214/growth-regulation-by-estrogen-in-breast-cancer-1-greb1-is-a-novel-progesterone-responsive-gene-required-for-human-endometrial-stromal-decidualization
#8
Alison J Camden, Maria M Szwarc, Sangappa B Chadchan, Francesco J DeMayo, Bert W O'Malley, John P Lydon, Ramakrishna Kommagani
STUDY QUESTION: Is Growth Regulation by Estrogen in Breast Cancer 1 (GREB1) required for progesterone-driven endometrial stromal cell decidualization? SUMMARY ANSWER: GREB1 is a novel progesterone-responsive gene required for progesterone-driven human endometrial stromal cell (HESC) decidualization. WHAT IS KNOWN ALREADY: Successful establishment of pregnancy requires HESCs to transform from fibroblastic to epithelioid cells in a process called decidualization...
September 1, 2017: Molecular Human Reproduction
https://www.readbyqxmd.com/read/28911209/intracellular-activation-of-ovastacin-mediates-pre-fertilization-hardening-of-the-zona-pellucida
#9
Hagen Körschgen, Michael Kuske, Konstantin Karmilin, Irene Yiallouros, Melanie Balbach, Julia Floehr, Dagmar Wachten, Willi Jahnen-Dechent, Walter Stöcker
STUDY QUESTION: How and where is pro-ovastacin activated and how does active ovastacin regulate zona pellucida hardening (ZPH) and successful fertilization? STUDY FINDING: Ovastacin is partially active before exocytosis and pre-hardens the zona pellucida (ZP) before fertilization. WHAT IS KNOWN ALREADY: The metalloproteinase ovastacin is stored in cortical granules, it cleaves zona pellucida protein 2 (ZP2) upon fertilization and thereby destroys the ZP sperm ligand and triggers ZPH...
September 1, 2017: Molecular Human Reproduction
https://www.readbyqxmd.com/read/28910583/performance-evaluation-of-startup-for-a-yeast-membrane-bioreactor-mbry-treating-landfill-leachate
#10
Míriam C S Amaral, Rosimeire F Gomes, Yara L Brasil, Sílvia M A Oliveira, Wagner G Moravia
The startup process of a membrane bioreactor inoculated with yeast biomass (Saccharomyces cerevisiae) and used in the treatment of landfill leachate was evaluated. The yeast membrane bioreactor (MBRy) was inoculated with an exogenous inoculum, a granulated active dry commercial bakers' yeast. The MBRy was successfully started up with a progressive increase in the landfill leachate percentage in the MBRy feed and the use of Sabouraud Dextrose Broth. The membrane plays an important role in the startup phase because of its full biomass retention and removal of organic matter...
September 14, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28899031/saccharomyces-cerevisiae-strains-for-second-generation-ethanol-production-from-academic-exploration-to-industrial-implementation
#11
Mickel L A Jansen, Jasmine M Bracher, Ioannis Papapetridis, Maarten D Verhoeven, Hans de Bruijn, Paul P de Waal, Antonius J A van Maris, Paul Klaassen, Jack T Pronk
The recent start-up of several full-scale 'second generation' ethanol plants marks a major milestone in the development of Saccharomyces cerevisiae strains for fermentation of lignocellulosic hydrolysates of agricultural residues and energy crops. After a discussion of the challenges that these novel industrial contexts impose on yeast strains, this minireview describes key metabolic engineering strategies that have been developed to address these challenges. Additionally, it outlines how proof-of-concept studies, often developed in academic settings, can be used for the development of robust strain platforms that meet the requirements for industrial application...
August 1, 2017: FEMS Yeast Research
https://www.readbyqxmd.com/read/28892796/a-solid-composite-microbial-inoculant-for-the-simultaneous-removal-of-volatile-organic-sulfide-compounds-preparation-characterization-and-its-bioaugmentation-of-a-biotrickling-filter
#12
Dong-Zhi Chen, Xiang-Yu Zhao, Xiao-Ping Miao, Jing Chen, Jie-Xu Ye, Zhuo-Wei Cheng, Shi-Han Zhang, Jian-Meng Chen
Volatile organic sulfide compounds (VOSCs) are usually resistant to biodegradation, thereby limiting the performance of traditional biotechnology dealing with waste gas containing such pollutants especially in mixture. In this study, a solid composite microbial inoculant (SCMI) was prepared to remove dimethyl sulfide (DMS) and propanethiol (PT). Given that the DMS degradation activity of Alcaligenes sp. SY1 is inducible and the PT-degradation activity of Pseudomonas putida S-1 is constitutive, different strategies are designed for cell cultivation to obtain high VOSC removal rates of SCMI...
September 1, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28887274/the-qualitative-grading-of-muscle-fat-infiltration-in-whiplash-using-fat-water-magnetic-resonance-imaging
#13
Rebecca Abbott, Anneli Peolsson, Janne West, James M Elliott, Ulrika Åslund, Anette Karlsson, Olof Dahlqvist Leinhard
BACKGROUND CONTEXT: Development of muscle fat infiltration (MFI) in the neck muscles is associated with poor functional recovery following whiplash injury. Custom software and time-consuming manual segmentation of magnetic resonance (MR) images is required for quantitative analysis and presents as a barrier for clinical translation. PURPOSE: The purpose of this work was to establish a qualitative MR measure for MFI and evaluate its ability to differentiate between individuals with severe whiplash-associated disorder (WAD), mild/moderate WAD, and healthy controls...
September 5, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/28871119/magnetite-nanoparticles-enhance-the-performance-of-a-combined-bioelectrode-uasb-reactor-for-reductive-transformation-of-2-4-dichloronitrobenzene
#14
Caiqin Wang, Lu Ye, Jie Jin, Hui Chen, Xiangyang Xu, Liang Zhu
Direct interspecies electron transfer (DIET) among the cometabolism microbes plays a key role in the anaerobic degradation of persistent organic pollutants and stability of anaerobic bioreactor. In this study, the COD removal efficiency increased to 99.0% during the start-up stage in the combined bioelectrode-UASB system (R1) with magnetite nanoparticles addition, which was higher than those in the coupled bioelectrode-UASB (R2; 83.2%) and regular UASB (R3; 71.0%). During the stable stage, the increase of 2,4-dichloronitrobenzene (2,4-DClNB) concentration from 25 mg L(-1) to 200 mg L(-1) did not affect the COD removal efficiencies in R1 and R2, whereas the performance of R3 was deteriorated obviously...
September 4, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28859547/fast-start-up-of-anammox-process-with-mixed-activated-sludge-and-settling-option
#15
Lihong Ye, Dong Li, Jie Zhang, Huiping Zeng
In this study, successful start-up of the anaerobic ammonium oxidation (anammox) process in a sequencing batch reactor (SBR) was achieved by seeding mixed activated sludge which included aerobic sludge, anaerobic sludge, simultaneous partial nitrification, anammox and denitrification (SNAD) sludge and anammox sludge with low activity at a 2200: 2100: 5: 2 volume ratio. On day 15, the effective anammox activity was attained in SBR, with the specific total nitrogen removal rate (SRR) of 0.214 gNg(-1)VSS d(-1)...
August 31, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28855815/start-up-performance-and-granular-sludge-features-of-an-improved-external-circulating-anaerobic-reactor-for-algae-laden-water-treatment
#16
Yaqin Yu, Xiwu Lu
The microbial characteristics of granular sludge during the rapid start of an enhanced external circulating anaerobic reactor were studied to improve algae-laden water treatment efficiency. Results showed that algae laden water was effectively removed after about 35 d, and the removal rates of chemical oxygen demand (COD) and algal toxin were around 85% and 92%, respectively. Simultaneously, the gas generation rate was around 380 mL/gCOD. The microbial community structure in the granular sludge of the reactor was complicated, and dominated by coccus and filamentous bacteria...
September 2017: Saudi Journal of Biological Sciences
https://www.readbyqxmd.com/read/28817513/from-start-up-to-sustainability-a-decade-of-collaboration-to-shape-the-future-of-nursing
#17
Paula Gubrud, Angela G Spencer, Linda Wagner
AIM: This article describes progress the Oregon Consortium for Nursing Education has made toward addressing the academic progression goals provided by the 2011 Institute of Medicine's Future of Nursing: Leading Change, Advancing Health report. BACKGROUND: The history of the consortium's development is described, emphasizing the creation of an efficient and sustainable organization infrastructure that supports a shared curriculum provided through a community college/university partnership...
September 2017: Nursing Education Perspectives
https://www.readbyqxmd.com/read/28811161/acceleration-of-electroactive-anammox-electroammox-start-up-by-switching-acetate-pre-acclimated-biofilms-to-electroammox-biofilms
#18
Jiahuan Tang, Shanshan Chen, Lingyan Huang, Xiaojuan Zhong, Guiqin Yang, Shungui Zhou
In this study, an operational method of switching acetate media to ammonium media after the formation of stable acetate-oxidizing biofilms (ACAM mode), was developed. The results showed that the start-up time was shortened to 48days in the ACAM mode compared to the AM (always ammonium media) mode (>120days), and an ammonia removal rate of 82±3% was achieved successfully and sustainably in the ACAM mode during the following long-term operation of more than 2months. Moreover, the ACAM mode was more efficient in enriching both electroammox bacteria and electricigens with Ignavibacteriaceae, Geobacteraceae and Nitrosomonadaceae as dominant families, which could favour the formation of high-performance electroammox biofilms...
August 9, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28810218/effect-of-cold-adapted-microbial-agent-inoculation-on-enzyme-activities-during-composting-start-up-at-low-temperature
#19
Qinghong Sun, Di Wu, Zhechao Zhang, Yue Zhao, Xinyu Xie, Junqiu Wu, Qian Lu, Zimin Wei
In order to put forward a method to promote composting start-up at low ambient temperature, the cold-adapted microbial agent (CAMA) was inoculated in chicken manure (CM), and compared the enzymes activities, including urease, proteases, β-glucosidase and invertase, with no CAMA group (CK). In this study, the temperature of CM reached 50°C in 53h, but it in CK was only around 30°C during the composting process. Moreover, the enzymes exhibited higher activity in CM than CK, indicating the effectiveness of CAMA...
November 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28807424/a-national-collaborative-approach-to-reduce-catheter-associated-urinary-tract-infections-in-nursing-homes-a-qualitative-assessment
#20
Sarah L Krein, Molly Harrod, Sue Collier, Kristina K Davis, Andrew J Rolle, Karen E Fowler, Lona Mody
BACKGROUND: Reducing health care-associated infections (HAIs), such as catheter-associated urinary tract infection (CAUTI), is a critical performance improvement target in nursing homes. The Agency for Healthcare Research and Quality Safety Program for Long-term Care: Health Care-Associated Infections/Catheter-Associated Urinary Tract Infection, a national performance improvement program, was designed to promote implementation of a CAUTI prevention program through state-based or regional collaboratives in more than 500 nursing homes across the United States...
August 12, 2017: American Journal of Infection Control
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