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https://www.readbyqxmd.com/read/29345536/uasb-septic-tank-as-an-alternative-for-decentralized-wastewater-treatment-in-mexico
#1
Ángel L Santiago-Díaz, Julisa García-Albortante, Mónica L Salazar-Peláez
The aim of this work was to evaluate the performance of a UASB-septic tank as a decentralized treatment of high strength municipal wastewater, under two different HRTs (48 and 72h). Thus, a lab scale (44.85L) UASB-septic tank constituted by three compartments was operated under HRT 72h and 48h. Removal efficiencies of total COD, BOD5 and suspended solids ranged from 60% to 80% for the first two parameters and from 70% to 90% for the last one. According to the statistical analysis, it was established that decreasing HRT from 72h to 48h did not affect the performance of the UASB-septic tank; therefore, the latter HRT is recommended to be used for operation...
January 18, 2018: Environmental Technology
https://www.readbyqxmd.com/read/29344000/visible-near-infrared-spectroscopic-assessment-of-urogenital-tissue-in-premenopausal-and-postmenopausal-women
#2
Miranda A Farage, Tom Cambron, Kan-Zhi Liu
Background: A clinical study was conducted to evaluate the feasibility of using visible and near-infrared (NIR) spectroscopy as a potential noninvasive measure of genital skin health in premenopausal and postmenopausal women. Methods: A total of 45 female subjects (aged 21-70 years), all of whom gave fully informed consent to participate, were enrolled in the study and assigned to 1 of 3 groups: 15 premenopausal (Pre-M), 15 postmenopausal receiving hormone replacement therapy (Post-M HRT), and 15 postmenopausal receiving no form of hormone replacement therapy (Post-M non-HRT)...
2018: Clinical Medicine Insights. Women's Health
https://www.readbyqxmd.com/read/29339624/the-combined-effects-of-carbon-nitrogen-ratio-suspended-biomass-hydraulic-retention-time-and-dissolved-oxygen-on-nutrient-removal-in-a-laboratory-scale-anaerobic-anoxic-oxic-activated-sludge-biofilm-reactor
#3
D S Manu, Arun Kumar Thalla
The current trend in sustainable development deals mainly with environmental management. There is a need for economically affordable, advanced treatment methods for the proper treatment and management of domestic wastewater containing excess nutrients (such as nitrogen and phosphorus) which can cause eutrophication. The reduction of the excess nutrient content of wastewater by appropriate technology is of much concern to the environmentalist. In the current study, a novel integrated anaerobic-anoxic-oxic activated sludge biofilm (A2O-AS-biofilm) reactor was designed and operated to improve the biological nutrient removal by varying reactor operating conditions such as carbon to nitrogen (C/N) ratio, suspended biomass, hydraulic retention time (HRT) and dissolved oxygen (DO)...
January 2018: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/29336216/sulfamethoxazole-removal-in-membrane-photocatalytic-reactor-system-experimentation-and-modelling
#4
Raju C Asha, M S Priyanka Yadav, Mathava Kumar
In this study, the efficacy of membrane-photocatalytic reactor (MPR) in sulfamethoxazole (SMX) removal was explored at a fixed initial SMX concentration, i.e. 100 mg/L. A supported catalyst, i.e. TiO2 on granular activated carbon (GAC-TiO2), was used for MPR experiments. The SMX removal efficiency of the MPR was investigated under a range of hydraulic retention time (i.e. HRT from 51 ∼ 152.5 min) and TiO2 catalyst dosage (55 ∼ 550 mg/L). A maximum SMX removal efficiency of 83.6% was observed under 220 mg/L catalyst dosage and 80 min HRT...
January 16, 2018: Environmental Technology
https://www.readbyqxmd.com/read/29334923/relationship-between-corneal-biomechanical-properties-and-structural-biomarkers-in-patients-with-normal-tension-glaucoma-a-retrospective-study
#5
Keunheung Park, Jonghoon Shin, Jiwoong Lee
BACKGROUND: We evaluated the relationships between corneal biomechanical properties and structural parameters in patients with newly diagnosed, untreated normal-tension glaucoma (NTG). METHODS: All subjects were evaluated using an Ocular Response Analyzer (ORA) measuring corneal hysteresis (CH) and the corneal resistance factor (CRF). Central corneal thickness (CCT), Goldmann applanation tonometric (GAT) data, axial length, and the spherical equivalent (SE), were also measured...
January 15, 2018: BMC Ophthalmology
https://www.readbyqxmd.com/read/29334654/phbv-polymer-supported-denitrification-system-efficiently-treated-high-nitrate-concentration-wastewater-denitrification-performance-microbial-community-structure-evolution-and-key-denitrifying-bacteria
#6
Zhongshuo Xu, Liyan Song, Xiaohu Dai, Xiaoli Chai
Biodegradable polymer supported denitrification (BPD) system shows good denitrification performance for the wastewater with low nitrate concentrations. In this study, a BPD system using Poly (3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) polymer as carbon source was developed to treat the wastewater with high nitrate concentrations. The denitrification performance, utilization ratio of PHBV polymers, and microbial community structure evolution and key denitrifying bacteria were comprehensively studied. Results indicated that an average nitrate removal efficiency of 99% could be achieved with an influent NO3--N concentration of 100 mg L-1 and a hydraulic retention time (HRT) of 7...
January 8, 2018: Chemosphere
https://www.readbyqxmd.com/read/29333956/high-efficiency-treatment-of-pta-wastewater-using-a-biogas-jet-assisted-anaerobic-fluidized-bed-reactor
#7
Wei Zhang, Yangyang Feng, Yingwen Chen, Peiwen Li, Shemin Zhu, Shubao Shen
In this paper, a new type of biogas jet assisted anaerobic fluidized bed reactor loaded with a polypropylene (PP) carrier, has been proposed. There was a clear improvement in the fluidized state due to the biogas assisted input when the gas/water ratio was set at 1:3 with a suitable carrier loading of 60%. When the circulating water flow is 30 L/min assisted with biogas 10 L/min, the mixing time shortens from 26 s to 18 s. The performance of anaerobic biodegradation on wastewater treatment was improved largely...
January 15, 2018: Environmental Technology
https://www.readbyqxmd.com/read/29332249/correlation-of-flow-density-as-measured-using-optical-coherence-tomography-angiography-with-structural-and-functional-parameters-in-glaucoma-patients
#8
Maged Alnawaiseh, Larissa Lahme, Viktoria Müller, André Rosentreter, Nicole Eter
PURPOSE: To evaluate the correlation between flow density, as measured by optical coherence tomography angiography (OCTA), and structural and functional parameters in patients with open-angle glaucoma. METHODS: Thirty-four eyes of 34 patients with open-angle glaucoma and 35 eyes of 35 healthy subjects were prospectively included in this study. OCTA was performed using RTVue XR Avanti with AngioVue. The macula was imaged with a 3 × 3 mm scan and the optic nerve head (ONH) with a 4...
January 13, 2018: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/29331894/pharmaceutical-concentration-variability-at-sewage-treatment-plant-outlets-dominated-by-hydrology-and-other-factors
#9
Andrea F Brunsch, Thomas L Ter Laak, Huub Rijnaarts, Ekkehard Christoffels
A study was conducted in which the effluent at four small to medium sized sewage treatment plants (STP) in North Rhine-Westphalia, Germany was monitored for three pharmaceutical compounds (carbamazepine, diclofenac, metoprolol) over a period of four years. Grab sampling and auto sampling campaigns were accomplished with respect to various weather conditions in the catchment area. Flow volumes and hydraulic retention times (HRT) from various sampling dates which provide information on processes causing emission changes were additionally taken into account...
January 11, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29324361/simultaneous-removal-of-atrazine-and-organic-matter-from-wastewater-using-anaerobic-moving-bed-biofilm-reactor-a-performance-analysis
#10
Zahra Derakhshan, Amir Hossein Mahvi, Mohammad Taghi Ghaneian, Seyed Mohammad Mazloomi, Mohammad Faramarzian, Mansooreh Dehghani, Hossein Fallahzadeh, Saeed Yousefinejad, Enayat Berizi, Mohammad Hassan Ehrampoush, Shima Bahrami
In this study, an anaerobic moving bed biofilm reactor (AMBBR) was designed to biodegrade atrazine under mesophilic (32 °C) condition and then it was evaluated for approximately 1 year. After biofilm formation, acclimation, and enrichment of microbial population within the bioreactor, the effect of various operation conditions such as changes in the concentration of influent atrazine and sucrose, hydraulic retention time (HRT), and salinity on the removal of atrazine and chemical oxygen demand (COD) were studied...
January 8, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29315421/development-of-a-new-comprehensive-and-reliable-endometrial-receptivity-map-er-map-er-grade-based-on-rt-qpcr-gene-expression-analysis
#11
M Enciso, J P Carrascosa, J Sarasa, P A Martínez-Ortiz, S Munné, J A Horcajadas, J Aizpurua
STUDY QUESTION: Is it possible to determine the receptivity status of an endometrium by combined quantitative reverse transcription PCR (RT-qPCR) expression analysis of genes involved in endometrial proliferation and immunity? SUMMARY ANSWER: The new ER Map®/ER Grade® test can predict endometrial receptivity status by RT-qPCR using a new panel of genes involved in endometrial proliferation and the maternal immune response associated to embryonic implantation. WHAT IS KNOWN ALREADY: The human endometrium reaches a receptive status adequate for embryonic implantation around Days 19-21 of the menstrual cycle...
January 5, 2018: Human Reproduction
https://www.readbyqxmd.com/read/29314248/calcium-and-vitamin-d-supplementation-are-not-associated-with-risk-of-incident-ischaemic-cardiac-events-or-death-findings-from-the-uk-biobank-cohort
#12
Nicholas C Harvey, Stefania D'Angelo, Julien Paccou, Elizabeth M Curtis, Mark Edwards, Zahra Raisi-Estabragh, Karen Walker-Bone, Steffen E Petersen, Cyrus Cooper
We investigated associations between calcium/vitamin D supplementation and incident cardiovascular events/deaths in a UK population-based cohort. UK Biobank is a large prospective cohort comprising 502,637 men and women aged 40-69 years at recruitment. Supplementation with calcium/vitamin D was self-reported, and information on incident hospital admission (ICD-10) for ischaemic heart disease (IHD), myocardial infarction (MI) any cardiovascular event, and subsequent death, was obtained from linkage to national registers...
January 4, 2018: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/29313089/first-delivery-and-ovariectomy-affect-biomechanical-and-structural-properties-of-the-vagina-in-the-ovine-model
#13
Iva Urbankova, Geertje Callewaert, Silvia Blacher, Dries Deprest, Lucie Hympanova, Andrew Feola, Laurent De Landsheere, Jan Deprest
INTRODUCTION AND HYPOTHESIS: Animal models are useful for investigating the genesis of pelvic floor dysfunction and for developing novel therapies for its treatment. There is a need for an alternative large-animal model to the nonhuman primate. Therefore we studied the effects of the first vaginal delivery, ovariectomy and systemic hormonal replacement therapy (HRT) on the biomechanical and structural properties of the ovine vagina. METHODS: We examined the gross anatomical properties of nulliparous, primiparous, ovariectomized multiparous, and ovariectomized hormone-replaced multiparous sheep (six animals per group)...
January 8, 2018: International Urogynecology Journal
https://www.readbyqxmd.com/read/29289920/achieving-high-level-nitrogen-removal-in-mainstream-by-coupling-anammox-with-denitrifying-anaerobic-methane-oxidation-in-a-membrane-biofilm-reactor
#14
Guo-Jun Xie, Tao Liu, Chen Cai, Shihu Hu, Zhiguo Yuan
To achieve energy neutral wastewater treatment, mainstream anaerobic ammonium oxidation (anammox) has attracted extensive attention in the past decade. However, the relatively high effluent nitrogen concentration (>10 mg N L-1) remains a significant barrier hindering its practical implementation. A novel technology integrating the anammox and denitrifying anaerobic methane oxidation (DAMO) reactions in a membrane biofilm reactor (MBfR) was developed in this study to enhance the mainstream anammox process...
December 20, 2017: Water Research
https://www.readbyqxmd.com/read/29284719/cross-sectional-analyses-of-participation-in-cancer-screening-and-use-of-hormone-replacement-therapy-and-medications-in-meat-eaters-and-vegetarians-the-epic-oxford-study
#15
Tammy Y N Tong, Paul N Appleby, Kathryn E Bradbury, Timothy J Key
OBJECTIVES: To examine differences in health-related behaviours such as screening or testing for cancer, use of hormone replacement therapy (HRT) and use of other medications in different diet groups. DESIGN: We studied 31 260 participants across four diet groups (18 155 meat eaters, 5012 fish eaters, 7179 vegetarians, 914 vegans) in the UK EPIC-Oxford cohort. Information was collected in 5-year (around 2000-2003) or 10-year (around 2007) follow-up questionnaires regarding participation in breast screening, cervical screening, prostate-specific antigen (PSA) testing, use of HRT and use of medications for the past 4 weeks...
December 27, 2017: BMJ Open
https://www.readbyqxmd.com/read/29281480/improved-salt-removal-and-power-generation-in-a-cascade-of-two-hydraulically-connected-up-flow-microbial-desalination-cells
#16
Surajbhan Sevda, Ibrahim M Abu-Reesh
A novel two chamber up-flow microbial desalination cell (UMDC) was designed for evaluating desalination of real seawater with simultaneous wastewater treatment and energy generation. Two UMDCs were hydraulically connected in continuous flow mode (cascade mode) and operated at ten different hydraulic retention times (HRTs) [120 h to 12 h] and salt retention times (SRTs) [40 h to 4 h] for improved performance of chemical oxygen demand (COD) and salt removal. These UMDCs were operated at different combinations of high power (higher external resistance) and high current (low external resistance) mode to find the most suitable conditions for obtaining higher COD removal, salt removal, power production and current generation...
December 27, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/29280452/conventional-versus-hypofractionated-radiation-therapy-for-localized-or-locally-advanced-prostate-cancer-a-systematic-review-and-meta-analysis-along-with-therapeutic-implications
#17
REVIEW
Niloy R Datta, Emanuel Stutz, Susanne Rogers, Stephan Bodis
PURPOSE: A systematic review and meta-analysis were conducted to evaluate the therapeutic outcomes of conventional radiation therapy (CRT) and hypofractionated radiation therapy (HRT) for localized or locally advanced prostate cancer (LLPCa). METHODS AND MATERIALS: A total of 599 abstracts were extracted from 5 databases and screened in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines. Only phase III trials randomized between CRT and HRT in LLPCa with a minimum of 5 years of follow-up data were considered...
November 1, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/29277854/update-on-the-effect-of-exogenous-hormone-use-on-glioma-risk-in-women-a-meta-analysis-of-case-control-and-cohort-studies
#18
Yu-Long Lan, Xun Wang, Jia-Cheng Lou, Bin-Bin Ma, Jin-Shan Xing, Shuang Zou, Bo Zhang
Various studies have confirmed the important roles of endogenous hormones in the development of gliomas, while the roles of exogenous hormones remain controversial. Based on case-control studies and cohort studies, a meta-analysis was exerted to explore the effect of two exogenous hormones use (HRT: hormone replacement therapy; OC: oral contraceptives) on glioma risk. 16 eligible studies, including 11 case-control studies and 5 cohort studies, containing 8055027 women, were included in our study. All included studies have reported the relative risks (RRs) or odds ratios (ORs), and 95% confidence intervals (CIs)...
December 26, 2017: Journal of Neuro-oncology
https://www.readbyqxmd.com/read/29275285/a-3dber-s-ec-process-for-simultaneous-nitrogen-and-phosphorus-removal-from-wastewater-with-low-organic-carbon-content
#19
Ruixia Hao, Yanqing Zhou, Jianbing Li, Jianchao Wang
A new process was proposed by integrating a three-dimensional biofilm electrode reactor with sulfur autotrophic denitrification and electrocoagulation within the same reactor. The results indicated that under the wastewater influent condition of NO3--N = 30 mg/L, COD = 45 mg/L, total phosphorus (TP) = 1.5 mg/L, hydraulic retention time (HRT) = 8 h, and I = 400 mA, the NO3--N and TP removal of the proposed process reached 89.8% and 83.0%, respectively. It was observed that the electrocoagulation process improved phosphorus removal, while the simultaneous existence of heterotrophic, hydrogen, sulfur and iron autotrophic denitrifying bacteria led to enhanced and stabilized nitrogen removal...
December 21, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/29259479/retrospective-comparative-study-of-the-factors-affecting-birthweights-in-frozen-thawed-embryo-transfer-compared-to-fresh-embryo-transfer
#20
Yuta Tsuji, Junko Otsuki, Toshiroh Iwasaki, Kohyu Furuhashi, Yukiko Matsumoto, Shoji Kokeguchi, Masahide Shiotani
Aim: Several studies have indicated that the cause of the increased birthweight of frozen-thawed embryos was associated with assisted reproductive technology (ART) procedures, such as cryopreservation. In the present study, the mean birthweight of singletons was compared between the ovulatory and hormone replacement therapy (HRT) cycles in order to investigate the primary factor that leads to higher birthweights from frozen-thawed embryo transfer (FET). Methods: This retrospective study was carried out from January 2011 to December 2014 on 2738 singletons who were born at 37-41 weeks' gestation, following ART in a single facility...
July 2017: Reproductive Medicine and Biology
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