Treatment of brewery wastewater by pilot scale upflow anaerobic sludge blanket reactor in mesophilic temperature

248-251In this study, treatment of brewery wastewater by pilot scale upflow anaerobic sludge blanket (UASB) reactor in mesophilic phase was investigated. UASB reactor was achieved with brewery wastewater to an organic loading rate (OLR) of 7 kg COD/m3-d at 12 m/d upflow velocity with a hydraulic retention time (HRT) of 3.5 day, and chemical oxygen demand (COD) removal efficiency of 95% with a methane yield of 0.30 m3 CH4/kg COD removed. At an OLR 0.20 kg COD/m3-d, sludge concentration was increased and reached even 70000 mg/l at the end of 6 th month. At the end of experiment, a granular sludge with good settling properties was produced

Effects of geometry and PVP addition on mechanical behavior of PEI membranes for use in wastewater treatment

This study focuses on the mechanical behavior and design of membrane filters that are used in water and wastewater treatment. The aim of this study is, after characterizing the mechanical behavior of the membrane materials, to find a better shape in terms of mechanical parameters. As the first step, uniaxial tensile testing is applied to the produced polymeric membranes with certain contents of poly(ether imide), poly(vinylpyrrolidone), and N-methyl-2-pyrrolidone to get an understanding of the mechanical behavior of the membrane materials. The material data obtained from this experimental process are used as input to software where a finite element model of the membrane is built. Each geometry has the same boundary conditions and the same area, and the same pressure is applied to each geometry. Using these numerical models, the selected geometries are analyzed in terms of displacement, equivalent stress, and equivalent strain. The results are discussed based on these parameters

Serum Tryptase Concentrations in Patients with Hymenoptera Venom Allergy in Beekeeping Zone

Annual Meeting of the American-Academy-of-Allergy-Asthma-and-Immunology (AAAAI) -- FEB 20-24, 2015 -- Houston, TXDursun, A. Berna/0000-0002-6337-6326WOS: 000361129600686[No abstract available]Amer Acad Allergy, Asthma & Immuno

Determinants of Placebo Reaction at Oral Provocation Test in Adults

Annual Meeting of the American-Academy-of-Allergy-Asthma-and-Immunology (AAAAI) -- FEB 20-24, 2015 -- Houston, TXDursun, A. Berna/0000-0002-6337-6326WOS: 000361129600379[No abstract available]Amer Acad Allergy, Asthma & Immuno

The use of alum as coagulant for removing cyanobacterial cells in drinking water

A variety of problems can occur due to the presence of cyanobacteria in water resources used for drinking, agricultural, industrial, commercial, and recreational purposes. In addition, certain cyanobacteria genera are producers of several potent toxins, which endanger the human and animal health. Coagulation is the key step in water treatment process for algae and cyanobacteria, and their associated metabolites removal. The objective of this study was to examine the coagulation processes to optimize the removal of cyanobacterial cells from drinking water under various aluminum sulfate dose and pH values. The influence of cationic polyelectrolyte as a coagulant aid on the cells in accompany with aluminum sulfate was also studied. A set of jar test experiments at 200rpm of rapid mixing, and 30rpm of slow mixing and 30min settling time were conducted to find the optimum chemical dose and pH. From the results of the tests, the optimum dose and pH for aluminum sulfate coagulant and polyelectrolyte were obtained corresponding to the lowest concentrations of cyanobacterial cells and turbidity

Removal of intra- and extracellular microcystin by submerged ultrafiltration (UF) membrane combined with coagulation/flocculation and powdered activated carbon (PAC) adsorption

In this study, we investigated the performance of conventional (coagulation/flocculation -> powdered activated carbon [PAC] adsorption) and advanced treatment (coagulation/flocculation -> PAC adsorption -> submerged ultrafiltration [UF] membrane) processes separately and sequentially for the removal of total (intra- and extracellular) microcystin. Results of the conventional treatment process demonstrated that coagulation/flocculation alone was not effective (up to 70%) for the removal of total microcystin, while the uptake of total microcystin was achieved up to 84% by PAC adsorption (PAC dose of 20 mg/L). In addition, the adsorption kinetic mechanism of PAC was also examined using several kinetic models. Results showed that the pseudo-second order (PSOM) and Weber-Morris intraparticle diffusion model (IPDM) are the most suitable models for this study (r(2)>0.98 and p-values <= 0.05). On the other hand, up to 94% of microcystin was effectively removed when the coagulation/flocculation and PAC systems were combined with UF membranes. Also, the permeate concentration was found to be 0.3 mg/L, which is below the World Health Organization (WHO) guideline value of 1 mu g/L. Overall results indicated that higher removal of microcystin occurred using the advanced treatment process. Therefore, this combined system appears to be a promising treatment technique for the removal of total microcystin. (C) 2017 Elsevier B.V. All rights reserved

Anxiety and Depression in Patients with Allergic Disorders

Annual Meeting of the American-Academy-of-Allergy-Asthma-and-Immunology (AAAAI) -- FEB 20-24, 2015 -- Houston, TXDursun, A. Berna/0000-0002-6337-6326WOS: 000361129600436[No abstract available]Amer Acad Allergy, Asthma & Immuno

Effects of fulvic acid and ferric hydroxide on removal of Fe2+ and Mn2+ by oxidation and aerated/submerged ultrafiltration membrane system

The purpose of this study is to evaluate the effects of fulvic acid (FA) and ferric hydroxide on the Fe2+ and Mn2+ removal by oxidation and aerated/submerged membrane systems. Firstly, the oxidation kinetics of Fe2+ and Mn2+ in the presence of FA and ferric hydroxide are discussed and then the contribution of the oxidation step in membrane experiments is determined. All experiments are conducted with synthetic drinking water and the concentration of contaminants is determined by characterization of two different drinking water sources in the city of Istanbul: Omerli Dam Lake and Danamandira Village groundwater. The addition of ferric hydroxide helps to mitigate fouling and enhances the rejection of Mn2+ by up to 90% by developing a secondary filtration layer on the membrane surface which has been considered a challenge in drinking water treatment plants

Modeling of membrane fouling in a submerged membrane reactor using support vector regression

Removal rate of Fe2+ and Mn2+ using submerged membrane reactor for drinking water in the presence of fulvic acid and iron hydroxide is studied using the data from the experiments obtained from various concentrations of Fe2+, Mn2+, fulvic acid, and iron hydroxide. The relationship between these contaminants and membrane fouling is investigated. In the experiments, flux is kept as constant, and the pressure change with time is observed. To model the relationship, a regression analysis using the support vector regression (SVR) model is presented. Hyperparameter optimization for SVR is important, that is, wrong selection may cause underfitting/overfitting phenomena. In order to find optimal values, grid search method is performed with various parameters such as different kernel functions (radial basis functions, polynomial, linear), cost parameter (C), and scale parameters and epsilon. The results obtained by SVR show that proposed method is feasible

Effect of PVP content and polymer concentration on polyetherimide (PEI) and polyacrylonitrile (PAN) based ultrafiltration membrane fabrication and characterization

In this study, four different membranes were fabricated by using polyetherimide and polyacrylonitrile polymers, N-methyl-2-pyrrolidone and polyvinylpyrrolidone (PVP) via phase inversion method to improve the membrane performance in fruit juice wastewater (FJWW) treatment. The addition of PVP to the casting solution increased membrane hydrophilicity, water content, contact angle, porosity, Fourier transform infrared spectroscopy peaks, membrane thickness, average roughness and viscosity of cast solutions compared to the bare membrane. It can be said that the addition of a lower polymer concentration and PVP intensively increases the pure water flux of the membrane. However, as the flux increased, a small decrease in FJWW rejection was observed