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https://www.readbyqxmd.com/read/27933494/long-term-effects-of-increasing-acidity-on-low-ph-sulfate-reducing-bioprocess-and-bacterial-community
#1
Jing Zhao, Di Fang, Pengfei Zhang, Lixiang Zhou
An ethanol-fed, sulfate-reducing anaerobic baffled reactor was operated over a period of 260 days to assess the effects of sequentially more acidic conditions (pH 4.5-2.5) on sulfate reduction and bacterial community. Results showed that the reactor could reduce sulfate and generate alkalinity at progressively lower pH values of 4.5, 3.5, and 2.5 in a synthetic wastewater containing 2500 mg/L sulfate. About 93.9% of the influent sulfate was removed at a rate of 4691 mg/L/day, and the effluent pH was increased to 6...
December 8, 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27933053/waste-conversion-into-n-caprylate-and-n-caproate-resource-recovery-from-wine-lees-using-anaerobic-reactor-microbiomes-and-in-line-extraction
#2
Leo A Kucek, Jiajie Xu, Mytien Nguyen, Largus T Angenent
To convert wastes into sustainable liquid fuels and chemicals, new resource recovery technologies are required. Chain elongation is a carboxylate-platform bioprocess that converts short-chain carboxylates (SCCs) (e.g., acetate [C2] and n-butyrate [C4]) into medium-chain carboxylates (MCCs) (e.g., n-caprylate [C8] and n-caproate [C6]) with hydrogen gas as a side product. Ethanol or another electron donor (e.g., lactate, carbohydrate) is required. Competitive MCC productivities, yields (product vs. substrate fed), and specificities (product vs...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27932674/metabolic-adaptations-in-skeletal-muscle-after-84-days-bed-rest-with-and-without-concurrent-flywheel-resistance-exercise
#3
José Maria Irimia, Mario Guerrero, Paula Rodriguez-Miguelez, Joan Aureli Cadefau, Per A Tesch, Roser Cussó, Rodrigo Fernandez-Gonzalo
As metabolic changes in human skeletal muscle after long-term (simulated) spaceflight are not well understood, this study examined the effects of long-term microgravity, with and without concurrent resistance exercise on skeletal muscle oxidative and glycolytic capacity. Twenty-one men were subjected to 84 days head-down tilt bed rest with (BRE; n=9) or without (BR; n=12) concurrent flywheel resistance exercise. Activity and gene expression of glycogen synthase, glycogen phosphorylase (GPh), hexokinase, phosphofructokinase-1 (PFK-1) and citrate synthase (CS), as well as gene expression of succinate dehydrogenase (SDH), vascular endothelial growth factor (VEFG), peroxisome proliferator-activated receptor gamma coactivator-1 (PGC-1α) and myostatin, were analysed in samples from m...
December 8, 2016: Journal of Applied Physiology
https://www.readbyqxmd.com/read/27932661/draft-genome-sequence-of-the-anaerobic-ammonium-oxidizing-bacterium-candidatus-brocadia-sp-40
#4
Muhammad Ali, Mohamed Fauzi Haroon, Yuko Narita, Lei Zhang, Dario Rangel Shaw, Satoshi Okabe, Pascal E Saikaly
The anaerobic ammonium-oxidizing (anammox) bacterium "Candidatus Brocadia sp. 40" demonstrated the fastest growth rate compared to others in this taxon. Here, we report the 2.93-Mb draft genome sequence of this bacterium, which has 2,565 gene-coding regions, 41 tRNAs, and a single rrn operon.
December 8, 2016: Genome Announcements
https://www.readbyqxmd.com/read/27932039/anaerobic-digestion-of-nitrogen-rich-poultry-manure-impact-of-thermophilic-biogas-process-on-metal-release-and-microbial-resistances
#5
Reshma Anjum, Elisabeth Grohmann, Niclas Krakat
Poultry manure is a nitrogen rich fertilizer, which is usually recycled and spread on agricultural fields. Due to its high nutrient content, chicken manure is considered to be one of the most valuable animal wastes as organic fertilizer. However, when chicken litter is applied in its native form, concerns are raised as such fertilizers also include high amounts of antibiotic resistant pathogenic Bacteria and heavy metals. We studied the impact of an anaerobic thermophilic digestion process on poultry manure...
December 5, 2016: Chemosphere
https://www.readbyqxmd.com/read/27931936/biochemical-methane-potential-of-fractions-of-organic-matter-extracted-from-a-municipal-solid-waste-leachate-impact-of-their-hydrophobic-character
#6
Camille Baccot, Virginie Pallier, Geneviève Feuillade-Cathalifaud
Many data on anaerobic digestion (AD) and co-digestion of municipal solid waste leachate (MSWL) are already available in literature. They mainly deal with its performances to decrease the chemical oxygen demand (COD) of MSWL and no information is given on the impact of the specific characteristics of the dissolved organic matter (DOM) in leachate on these performances. DOM in leachate evolves towards more aromatic and hydrophobic compounds during landfilling with increasing specific ultra-violet absorbance index (SUVA) and hydrophobic character...
December 5, 2016: Waste Management
https://www.readbyqxmd.com/read/27931827/selection-of-an-endogenous-2-3-butanediol-pathway-in-escherichia-coli-by-fermentative-redox-balance
#7
Keming Liang, Claire R Shen
Fermentative redox balance has long been utilized as a metabolic evolution platform to improve efficiency of NADH-dependent pathways. However, such system relies on the complete recycling of NADH and may become limited when the target pathway results in excess NADH stoichiometrically. In this study, endogenous capability of Escherichia coli for 2,3-butanediol (2,3-BD) synthesis was explored using the anaerobic selection platform based on redox balance. To address the issue of NADH excess associated with the 2,3-BD pathway, we devised a substrate-decoupled system where a pathway intermediate is externally supplied in addition to the carbon source to decouple NADH recycling ratio from the intrinsic pathway stoichiometry...
December 5, 2016: Metabolic Engineering
https://www.readbyqxmd.com/read/27931390/thermal-effects
#8
Ming Yan, Panyue Zhang, Guangming Zeng
This review focuses on the research literatures published in 2015 relating to topics of thermal effects in water pollution control. This review is divided into the following sections: biological nitrogen and phosphorus removal, wastewater treatment for organic conversion, industrial wastewater treatment, anaerobic digestion of sewage sludge and solid waste, sludge biochar preparation and application, pyrolysis of sewage sludge, reduction heavy metal in sewage sludge and soil, and other issues of wastewater and sludge treatment...
October 2016: Water Environment Research: a Research Publication of the Water Environment Federation
https://www.readbyqxmd.com/read/27931382/mixing-and-transport
#9
Chein-Chi Chang, Tom Chapman, Elena Siverts-Wong, Li Wei, Ying Mei
This section covers research published during the calendar year 2015 on mixing and transport processes. The review covers mixing of anaerobic digesters, mixing of heat transfer, and environmental fate and transport.
October 2016: Water Environment Research: a Research Publication of the Water Environment Federation
https://www.readbyqxmd.com/read/27931375/chemical-waste-and-allied-products
#10
Yung-Tse Hung, Hamidi Abdul Aziz, Siti Fatihah Ramli, Ruth Yu-Li Yeh, Lian-Huey Liu, Christopher Robert Huhnke
This review of literature published in 2015 focuses on waste related to chemical and allied products. The topics cover the waste management, physicochemical treatment, aerobic granular, aerobic waste treatment, anaerobic granular, anaerobic waste treatment, chemical waste, chemical wastewater, fertilizer waste, fertilizer wastewater, pesticide wastewater, pharmaceutical wastewater, ozonation. cosmetics waste, groundwater remediation, nutrient removal, nitrification denitrification, membrane biological reactor, and pesticide waste...
October 2016: Water Environment Research: a Research Publication of the Water Environment Federation
https://www.readbyqxmd.com/read/27931366/anaerobic-process
#11
Qian Yang, Mei-Ting Ju, Wei-Zun Li, Le Liu, Yan-Nan Wang, Chein-Chi Chang
A review of the literature published in 2015 on the focus of Anaerobic Process. It is divided into the following sections. Pretreatment Organic waste Multiple-stage co-digestion Process Methodology and Technology.
October 2016: Water Environment Research: a Research Publication of the Water Environment Federation
https://www.readbyqxmd.com/read/27931365/membrane-processes
#12
Marie-Laure Pellegrin, Marie S Burbano, Mary E Sadler, Jason Diamond, Simon Baker, Anthony D Greiner, Sara Arabi, Joseph Wong, Alexandra Doody, Lokesh P Padhye, Keith Sears, Peter Kistenmacher, Fraser Kent, Leila Tootchi, Jorge Aguinaldo, Sara Saddredini, Bill Schilling, Kyungnan Min, Robert McCandless, Bryce Danker, Neranga P Gamage, Sunny Wang, Peter Aerts
This review, for literature published in 2015, contains information related to membrane processes for municipal and industrial applications. This review is a subsection of the Treatment Systems section of the annual Water Environment Federation literature review and covers the following topics: pretreatment, membrane bioreactor (MBR) configuration, design, nutrient removal, operation, industrial treatment, anaerobic membrane systems, reuse, microconstituents removal, membrane technology advances, membrane fouling, and modeling...
October 2016: Water Environment Research: a Research Publication of the Water Environment Federation
https://www.readbyqxmd.com/read/27931363/activated-sludge-and-other-aerobic-suspended-culture-processes
#13
Chunying Li, Li Wei, Chein-Chi Chang, Yuhua Zhang, Dong Wei
This is a literature review for the year 2015 and contains information specifically associated with suspended growth processes including activated sludge, upflow anaerobic sludge blanket, and sequencing batch reactors. The review encompasses modeling and kinetics, nutrient removal, system design and operation. Compared to past reviews, many topics show increase in activity in 2015. These include, fate and effect of xenobiotics, industrial wastes treatment with sludge, and pretreatment for the activated sludge...
October 2016: Water Environment Research: a Research Publication of the Water Environment Federation
https://www.readbyqxmd.com/read/27931175/a-simplified-stoichiometric-kinetic-model-for-estimating-the-concentration-of-reaction-products-in-anaerobic-digestion
#14
Moonil Kim, Fengaho Cui
Modelling the anaerobic digestion process is often complex and needs to consider many input parameters. This study simplified the modelling procedure by developing an idealized stoichiometric kinetic model that simulates the anaerobic digestion process with only a few parameters: composition coefficients (α and β), maximum substrate utilization rate (qmax), endogenous-decay coefficient (b), biodegradable fraction (fd), and temperature coefficient (Ф). We validated the model with the operating results of a pilot two-phase anaerobic digester for food wastewater disposal and calculated using the MATLAB programing software...
December 9, 2016: Environmental Technology
https://www.readbyqxmd.com/read/27931165/improvement-of-municipal-wastewater-pretreatment-by-direct-membrane-filtration
#15
Thiago A Nascimento, Fanny R Mejía, Fernando Fdz-Polanco, Mar Peña Miranda
The high content of particulate matter in municipal wastewater hinders the conventional anaerobic treatments at psychrophilic temperatures. The hydrolysis of the particulate chemical oxygen demand (pCOD) could be the limiting step under these conditions. Therefore, new pretreatments or improved conventional pretreatments are needed in order to separate pCOD. In this work, direct membrane filtration of municipal wastewater, using an ultrafiltration membrane, was investigated. This intensive pretreatment, which aims to separate soluble chemical oxygen demand (sCOD) and to concentrate pCOD, together with anaerobic treatments of both streams at psychrophilic and mesophilic conditions respectively, could be an alternative to the conventional activated sludge process...
December 8, 2016: Environmental Technology
https://www.readbyqxmd.com/read/27931052/a-6-week-sprint-interval-training-program-changes-anaerobic-power-quadriceps-moment-and-subcutaneous-tissue-thickness
#16
S Han, H Lee, H Kim, D Kim, C Choi, J Park
We examined the effects of a 6-week 40-m one-way sprint interval training program (based on sprint time). 13 untrained healthy male collegiate students performed six 40-m sprints with a 60-s resting interval between sprints during the first week, and one sprint was added each week until the sixth week. If the 40-m sprint time exceeded 110% of the fastest baseline 40-m sprint time, the run was repeated. Repeated-sprint cycling test (every 3 weeks), quadriceps moment (every 2 weeks), and abdominal and thigh subcutaneous tissue thickness (every 2 weeks) were measured...
December 8, 2016: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/27930996/stabilization-of-mercury-in-sediment-by-using-biochars-under-reducing-conditions
#17
Peng Liu, Carol J Ptacek, David W Blowes, Y Zou Finfrock, Robert A Gordon
Mercury (Hg) is widely distributed in different localities around the world and poses a serious health threat to humans, especially when ingested in the form of methylmercury (MeHg). Efforts have been directed toward decreasing the production of MeHg by converting Hg to stable forms. Activated carbon and biochar have been evaluated as stabilization agents for Hg in contaminated sediments. However, the long-term fate of Hg stabilized by these materials remains unclear. Here, we compare the effectiveness of Hg stabilization using two biochars prepared from switchgrass at 300°C (lowT) and 600°C (highT)...
November 10, 2016: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/27930957/treatment-of-landfill-leachate-in-municipal-wastewater-treatment-plants-and-impacts-on-effluent-ammonium-concentrations
#18
R B Brennan, E Clifford, C Devroedt, L Morrison, M G Healy
Landfill leachate is the result of water percolating through waste deposits that have undergone aerobic and anaerobic microbial decomposition. In recent years, increasingly stringent wastewater discharge requirements have raised questions regarding the efficacy of co-treatment of leachate in municipal wastewater treatment plants (WWTPs). This study aimed to (1) examine the co-treatment of leachate with a 5-day biochemical oxygen demand (BOD5): chemical oxygen demand (COD) ratio less than or slightly greater than 0...
December 5, 2016: Journal of Environmental Management
https://www.readbyqxmd.com/read/27930876/pioglitazone-on-improves-whole-body-aerobic-capacity-and-skeletal-muscle-energy-metabolism-in-patients-with-metabolic-syndrome
#19
Takashi Yokota, Shintaro Kinugawa, Kagami Hirabayashi, Tadashi Suga, Shingo Takada, Masashi Omokawa, Tomoyasu Kadoguchi, Masashige Takahashi, Arata Fukushima, Shouji Matsushima, Mayumi Yamato, Koichi Okita, Hiroyuki Tsutsui
AIMS/INTRODUCTION: Low aerobic capacity is a strong and independent predictor of all-cause mortality in patients with metabolic syndrome (MetS). Here, we investigated the effects of pioglitazone treatment on whole-body aerobic capacity and skeletal muscle energy metabolism in MetS patients. MATERIALS AND METHODS: Fourteen male patients with MetS received oral 15 mg/day pioglitazone for 4 months. To assess whole-body aerobic capacity, exercise testing with a bicycle ergometer was performed before and after pioglitazone treatment...
December 8, 2016: Journal of Diabetes Investigation
https://www.readbyqxmd.com/read/27930727/airway-microbiota-in-bronchoalveolar-lavage-fluid-from-clinically-well-infants-with-cystic-fibrosis
#20
Theresa A Laguna, Brandie D Wagner, Cynthia B Williams, Mark J Stevens, Charles E Robertson, Cole W Welchlin, Catherine E Moen, Edith T Zemanick, Jonathan K Harris
BACKGROUND: Upper airway cultures guide the identification and treatment of lung pathogens in infants with cystic fibrosis (CF); however, this may not fully reflect the spectrum of bacteria present in the lower airway. Our objectives were to characterize the airway microbiota using bronchoalveolar lavage fluid (BALF) from asymptomatic CF infants during the first year of life and to investigate the relationship between BALF microbiota, standard culture and clinical characteristics. METHODS: BALF, nasopharyngeal (NP) culture and infant pulmonary function testing data were collected at 6 months and one year of age during periods of clinical stability from infants diagnosed with CF by newborn screening...
2016: PloS One
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